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Add missing license/copyright
[SVN r35070]
This commit is contained in:
Dave Abrahams
parent
f482354ffd
commit
5184d64b80
@ -3,48 +3,333 @@
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Default cascading style sheet for the HTML output of Docutils.
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See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
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</head>
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<body>
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<h1 class="title">Bidirectional Traversal Concept</h1>
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<div class="document" id="bidirectional-traversal-concept">
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<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Bidirectional Traversal</em>
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concept if, in addition to <tt class="literal"><span class="pre">X</span></tt> meeting the requirements of Forward
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<h1 class="title">Bidirectional Traversal Concept</h1>
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<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
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<!-- Software License, Version 1.0. (See accompanying -->
|
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Bidirectional Traversal</em>
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concept if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> meeting the requirements of Forward
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Traversal Iterator, the following expressions are valid and respect
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the stated semantics.</p>
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<table border="1" class="table">
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<table border="1" class="docutils">
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<colgroup>
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<col width="38%" />
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<col width="37%" />
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<col width="25%" />
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</colgroup>
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<thead valign="bottom">
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<tr><th colspan="3">Bidirectional Traversal Iterator Requirements (in addition to Forward Traversal
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<tr><th class="head" colspan="3">Bidirectional Traversal Iterator Requirements (in addition to Forward Traversal
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Iterator)</th>
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</tr>
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<tr><th>Expression</th>
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<th>Return Type</th>
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<th>Assertion/Semantics /
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<tr><th class="head">Expression</th>
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<th class="head">Return Type</th>
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<th class="head">Assertion/Semantics /
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Pre-/Post-condition</th>
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</tr>
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</thead>
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<tbody valign="top">
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<tr><td><tt class="literal"><span class="pre">--r</span></tt></td>
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<td><tt class="literal"><span class="pre">X&</span></tt></td>
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<tr><td><tt class="docutils literal"><span class="pre">--r</span></tt></td>
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<td><tt class="docutils literal"><span class="pre">X&</span></tt></td>
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<td>pre: there exists
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<tt class="literal"><span class="pre">s</span></tt> such that <tt class="literal"><span class="pre">r</span>
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<tt class="docutils literal"><span class="pre">s</span></tt> such that <tt class="docutils literal"><span class="pre">r</span>
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<span class="pre">==</span> <span class="pre">++s</span></tt>. post:
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<tt class="docutils literal"><span class="pre">s</span></tt> is
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<tt class="literal"><span class="pre">--r</span> <span class="pre">==</span> <span class="pre">--s</span></tt>
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implies <tt class="literal"><span class="pre">r</span> <span class="pre">==</span>
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<span class="pre">s</span></tt>. <tt class="literal"><span class="pre">&r</span> <span class="pre">==</span> <span class="pre">&--r</span></tt>.</td>
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<tt class="docutils literal"><span class="pre">--(++r)</span> <span class="pre">==</span> <span class="pre">r</span></tt>.
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<tt class="docutils literal"><span class="pre">--r</span> <span class="pre">==</span> <span class="pre">--s</span></tt>
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implies <tt class="docutils literal"><span class="pre">r</span> <span class="pre">==</span>
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<span class="pre">s</span></tt>. <tt class="docutils literal"><span class="pre">&r</span> <span class="pre">==</span> <span class="pre">&--r</span></tt>.</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre">r--</span></tt></td>
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<td>convertible to <tt class="literal"><span class="pre">const</span> <span class="pre">X&</span></tt></td>
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<tr><td><tt class="docutils literal"><span class="pre">r--</span></tt></td>
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<td>convertible to <tt class="docutils literal"><span class="pre">const</span> <span class="pre">X&</span></tt></td>
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<td><pre class="first last literal-block">
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{
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X tmp = r;
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@ -54,18 +339,13 @@ implies <tt class="literal"><span class="pre">r</span> <span class="pre">==</spa
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</pre>
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</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre">iterator_traversal<X>::type</span></tt></td>
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<tr><td><tt class="docutils literal"><span class="pre">iterator_traversal<X>::type</span></tt></td>
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<td>Convertible to
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<tt class="literal"><span class="pre">bidirectional_traversal_tag</span></tt></td>
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<tt class="docutils literal"><span class="pre">bidirectional_traversal_tag</span></tt></td>
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<td> </td>
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</div>
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<hr class="footer" />
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<div class="footer">
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<a class="reference" href="BidirectionalTraversal.rst">View document source</a>.
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Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
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@ -1,3 +1,7 @@
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.. Copyright David Abrahams 2006. Distributed under the Boost
|
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.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
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Bidirectional Traversal Concept
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...............................
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@ -3,60 +3,340 @@
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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|
||||
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
||||
<title>Forward Traversal Concept</title>
|
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<link rel="stylesheet" href="default.css" type="text/css" />
|
||||
<style type="text/css">
|
||||
|
||||
/*
|
||||
:Author: David Goodger
|
||||
:Contact: goodger@users.sourceforge.net
|
||||
:Date: $Date$
|
||||
:Revision: $Revision$
|
||||
:Copyright: This stylesheet has been placed in the public domain.
|
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|
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Default cascading style sheet for the HTML output of Docutils.
|
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|
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See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
|
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customize this style sheet.
|
||||
*/
|
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|
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/* used to remove borders from tables and images */
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||||
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|
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|
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|
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|
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|
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<h1 class="title">Forward Traversal Concept</h1>
|
||||
<div class="document" id="forward-traversal-concept">
|
||||
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Forward Traversal</em>
|
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concept if, in addition to <tt class="literal"><span class="pre">X</span></tt> meeting the requirements of Default
|
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<h1 class="title">Forward Traversal Concept</h1>
|
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<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
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<!-- Software License, Version 1.0. (See accompanying -->
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Forward Traversal</em>
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concept if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> meeting the requirements of Default
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Constructible and Single Pass Iterator, the following expressions are
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<tr><th class="head" colspan="3">Forward Traversal Iterator Requirements (in addition to Default Constructible and Single Pass Iterator)</th>
|
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|
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<tr><th>Expression</th>
|
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|
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<a class="reference" href="ForwardTraversal.rst">View document source</a>.
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Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
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@ -1,3 +1,7 @@
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.. Copyright David Abrahams 2006. Distributed under the Boost
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.. Software License, Version 1.0. (See accompanying
|
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.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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Forward Traversal Concept
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.........................
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<h1 class="title">Incrementable Iterator Concept</h1>
|
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|
||||
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Incrementable Iterator</em>
|
||||
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|
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<h1 class="title">Incrementable Iterator Concept</h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
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|
||||
concept if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> being Assignable and Copy
|
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Constructible, the following expressions are valid and respect the
|
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|
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|
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|
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|
||||
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|
||||
<tr><th class="head" colspan="3">Incrementable Iterator Requirements (in addition to Assignable, Copy Constructible)</th>
|
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|
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|
||||
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|
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|
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|
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|
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|
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|
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|
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{
|
||||
X tmp = r;
|
||||
@ -44,18 +329,13 @@ stated semantics.</p>
|
||||
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|
||||
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|
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<a class="reference" href="IncrementableIterator.rst">View document source</a>.
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Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
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@ -1,3 +1,7 @@
|
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.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Incrementable Iterator Concept
|
||||
..............................
|
||||
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
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Interoperable Iterator Concept
|
||||
..............................
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||||
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||||
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<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
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<!-- Software License, Version 1.0. (See accompanying -->
|
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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|
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|
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|
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|
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|
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|
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|
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<a class="reference" href="LvalueIterator.rst">View document source</a>.
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Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
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||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
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Lvalue Iterator Concept
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.......................
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|
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<h1 class="title">Random Access Traversal Concept</h1>
|
||||
<div class="document" id="random-access-traversal-concept">
|
||||
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Random Access Traversal</em>
|
||||
<h1 class="title">Random Access Traversal Concept</h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Random Access Traversal</em>
|
||||
concept if the following expressions are valid and respect the stated
|
||||
semantics. In the table below, <tt class="literal"><span class="pre">Distance</span></tt> is
|
||||
<tt class="literal"><span class="pre">iterator_traits<X>::difference_type</span></tt> and <tt class="literal"><span class="pre">n</span></tt> represents a
|
||||
constant object of type <tt class="literal"><span class="pre">Distance</span></tt>.</p>
|
||||
<table border="1" class="table">
|
||||
semantics. In the table below, <tt class="docutils literal"><span class="pre">Distance</span></tt> is
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<X>::difference_type</span></tt> and <tt class="docutils literal"><span class="pre">n</span></tt> represents a
|
||||
constant object of type <tt class="docutils literal"><span class="pre">Distance</span></tt>.</p>
|
||||
<table border="1" class="docutils">
|
||||
<colgroup>
|
||||
<col width="28%" />
|
||||
<col width="30%" />
|
||||
@ -23,18 +308,18 @@ constant object of type <tt class="literal"><span class="pre">Distance</span></t
|
||||
<col width="20%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr><th colspan="4">Random Access Traversal Iterator Requirements (in addition to Bidirectional Traversal)</th>
|
||||
<tr><th class="head" colspan="4">Random Access Traversal Iterator Requirements (in addition to Bidirectional Traversal)</th>
|
||||
</tr>
|
||||
<tr><th>Expression</th>
|
||||
<th>Return Type</th>
|
||||
<th>Operational Semantics</th>
|
||||
<th>Assertion/
|
||||
<tr><th class="head">Expression</th>
|
||||
<th class="head">Return Type</th>
|
||||
<th class="head">Operational Semantics</th>
|
||||
<th class="head">Assertion/
|
||||
Precondition</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody valign="top">
|
||||
<tr><td><tt class="literal"><span class="pre">r</span> <span class="pre">+=</span> <span class="pre">n</span></tt></td>
|
||||
<td><tt class="literal"><span class="pre">X&</span></tt></td>
|
||||
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<td><tt class="docutils literal"><span class="pre">X&</span></tt></td>
|
||||
<td><pre class="first last literal-block">
|
||||
{
|
||||
Distance m = n;
|
||||
@ -50,80 +335,75 @@ Precondition</th>
|
||||
</td>
|
||||
<td> </td>
|
||||
</tr>
|
||||
<tr><td><tt class="literal"><span class="pre">a</span> <span class="pre">+</span> <span class="pre">n</span></tt>, <tt class="literal"><span class="pre">n</span> <span class="pre">+</span> <span class="pre">a</span></tt></td>
|
||||
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|
||||
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|
||||
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||||
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|
||||
<span class="pre">+=</span> <span class="pre">n;</span> <span class="pre">}</span></tt></td>
|
||||
<td> </td>
|
||||
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|
||||
<tr><td><tt class="literal"><span class="pre">r</span> <span class="pre">-=</span> <span class="pre">n</span></tt></td>
|
||||
<td><tt class="literal"><span class="pre">X&</span></tt></td>
|
||||
<td><tt class="literal"><span class="pre">return</span> <span class="pre">r</span> <span class="pre">+=</span> <span class="pre">-n</span></tt></td>
|
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|
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|
||||
<td> </td>
|
||||
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|
||||
<tr><td><tt class="literal"><span class="pre">a</span> <span class="pre">-</span> <span class="pre">n</span></tt></td>
|
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<td><tt class="literal"><span class="pre">X</span></tt></td>
|
||||
<td><tt class="literal"><span class="pre">{</span> <span class="pre">X</span> <span class="pre">tmp</span> <span class="pre">=</span> <span class="pre">a;</span> <span class="pre">return</span> <span class="pre">tmp</span>
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|
||||
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|
||||
<td> </td>
|
||||
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|
||||
<tr><td><tt class="literal"><span class="pre">b</span> <span class="pre">-</span> <span class="pre">a</span></tt></td>
|
||||
<td><tt class="literal"><span class="pre">Distance</span></tt></td>
|
||||
<td><tt class="literal"><span class="pre">a</span> <span class="pre"><</span> <span class="pre">b</span> <span class="pre">?</span> <span class="pre">distance(a,b)</span>
|
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|
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|
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|
||||
<span class="pre">:</span> <span class="pre">-distance(b,a)</span></tt></td>
|
||||
<td>pre: there exists a
|
||||
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|
||||
<tt class="literal"><span class="pre">Distance</span></tt> such that
|
||||
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|
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|
||||
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|
||||
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|
||||
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<a class="reference" href="RandomAccessTraversal.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
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|
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|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Random Access Traversal Concept
|
||||
...............................
|
||||
|
||||
|
||||
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<h1 class="title">Readable Iterator Concept</h1>
|
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<div class="document" id="readable-iterator-concept">
|
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<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Readable Iterator</em> concept
|
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for value type <tt class="literal"><span class="pre">T</span></tt> if, in addition to <tt class="literal"><span class="pre">X</span></tt> being Assignable and
|
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<h1 class="title">Readable Iterator Concept</h1>
|
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<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
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<!-- Software License, Version 1.0. (See accompanying -->
|
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
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<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Readable Iterator</em> concept
|
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for value type <tt class="docutils literal"><span class="pre">T</span></tt> if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> being Assignable and
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|
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the stated semantics. <tt class="docutils literal"><span class="pre">U</span></tt> is the type of any specified member of
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|
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<tr><th colspan="3">Readable Iterator Requirements (in addition to Assignable and Copy Constructible)</th>
|
||||
<tr><th class="head" colspan="3">Readable Iterator Requirements (in addition to Assignable and Copy Constructible)</th>
|
||||
</tr>
|
||||
<tr><th>Expression</th>
|
||||
<th>Return Type</th>
|
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|
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|
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|
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|
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|
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
<td><tt class="literal"><span class="pre">U&</span></tt></td>
|
||||
<td>pre: <tt class="literal"><span class="pre">pre:</span> <span class="pre">(*a).m</span></tt> is well-defined. Equivalent to <tt class="literal"><span class="pre">(*a).m</span></tt>.</td>
|
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|
||||
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|
||||
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|
||||
</table>
|
||||
</div>
|
||||
<hr class="footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="ReadableIterator.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,6 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Readable Iterator Concept
|
||||
.........................
|
||||
|
||||
@ -3,61 +3,341 @@
|
||||
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<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
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<title>Single Pass Iterator Concept</title>
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|
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<body>
|
||||
<h1 class="title">Single Pass Iterator Concept</h1>
|
||||
<div class="document" id="single-pass-iterator-concept">
|
||||
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Single Pass Iterator</em>
|
||||
<h1 class="title">Single Pass Iterator Concept</h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Single Pass Iterator</em>
|
||||
concept if the following expressions are valid and respect the stated
|
||||
semantics.</p>
|
||||
<table border="1" class="table">
|
||||
<table border="1" class="docutils">
|
||||
<colgroup>
|
||||
<col width="36%" />
|
||||
<col width="33%" />
|
||||
<col width="31%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr><th colspan="3">Single Pass Iterator Requirements (in addition to Incrementable Iterator and Equality
|
||||
<tr><th class="head" colspan="3">Single Pass Iterator Requirements (in addition to Incrementable Iterator and Equality
|
||||
Comparable)</th>
|
||||
</tr>
|
||||
<tr><th>Expression</th>
|
||||
<th>Return Type</th>
|
||||
<th>Assertion/Semantics /
|
||||
<tr><th class="head">Expression</th>
|
||||
<th class="head">Return Type</th>
|
||||
<th class="head">Assertion/Semantics /
|
||||
Pre-/Post-condition</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody valign="top">
|
||||
<tr><td><tt class="literal"><span class="pre">++r</span></tt></td>
|
||||
<td><tt class="literal"><span class="pre">X&</span></tt></td>
|
||||
<td>pre: <tt class="literal"><span class="pre">r</span></tt> is
|
||||
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|
||||
<td><tt class="docutils literal"><span class="pre">X&</span></tt></td>
|
||||
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|
||||
dereferenceable; post:
|
||||
<tt class="literal"><span class="pre">r</span></tt> is dereferenceable or
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
<td>convertible to <tt class="literal"><span class="pre">bool</span></tt></td>
|
||||
<td><tt class="literal"><span class="pre">==</span></tt> is an equivalence
|
||||
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|
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
<td>convertible to <tt class="literal"><span class="pre">bool</span></tt></td>
|
||||
<td><tt class="literal"><span class="pre">!(a</span> <span class="pre">==</span> <span class="pre">b)</span></tt></td>
|
||||
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|
||||
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|
||||
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|
||||
<tr><td><tt class="literal"><span class="pre">iterator_traversal<X>::type</span></tt></td>
|
||||
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|
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|
||||
<tt class="literal"><span class="pre">single_pass_traversal_tag</span></tt></td>
|
||||
<tt class="docutils literal"><span class="pre">single_pass_traversal_tag</span></tt></td>
|
||||
<td> </td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<hr class="footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="SinglePassIterator.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Single Pass Iterator Concept
|
||||
............................
|
||||
|
||||
|
||||
@ -3,47 +3,327 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
||||
<title>Swappable Iterator Concept</title>
|
||||
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||
<style type="text/css">
|
||||
|
||||
/*
|
||||
:Author: David Goodger
|
||||
:Contact: goodger@users.sourceforge.net
|
||||
:Date: $Date$
|
||||
:Revision: $Revision$
|
||||
:Copyright: This stylesheet has been placed in the public domain.
|
||||
|
||||
Default cascading style sheet for the HTML output of Docutils.
|
||||
|
||||
See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
|
||||
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|
||||
*/
|
||||
|
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|
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|
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The right padding separates the table cells. */
|
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|
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|
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|
||||
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|
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|
||||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||||
<h1 class="title">Swappable Iterator Concept</h1>
|
||||
<div class="document" id="swappable-iterator-concept">
|
||||
<p>A class or built-in type <tt class="literal"><span class="pre">X</span></tt> models the <em>Swappable Iterator</em> concept
|
||||
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|
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<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
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|
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<tr><th class="head" colspan="3">Swappable Iterator Requirements (in addition to Copy Constructible)</th>
|
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|
||||
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|
||||
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|
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|
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<dd>is also a model of <em>Swappable Iterator</em>. <em>--end note</em>]</dd>
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<a class="reference" href="SwappableIterator.rst">View document source</a>.
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Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
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@ -1,3 +1,7 @@
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.. Copyright David Abrahams 2006. Distributed under the Boost
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.. Software License, Version 1.0. (See accompanying
|
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.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
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|
||||
Swappable Iterator Concept
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||||
..........................
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||||
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|
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|
||||
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|
||||
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|
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|
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<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
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|
||||
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|
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|
||||
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|
||||
Iterators have an associated <em>set of value types</em>.</p>
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|
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|
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<tr><th class="head" colspan="3">Writable Iterator Requirements (in addition to Copy Constructible)</th>
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
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|
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|
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|
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|
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<a class="reference" href="WritableIterator.rst">View document source</a>.
|
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Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
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|
||||
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|
||||
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|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Writable Iterator Concept
|
||||
.........................
|
||||
|
||||
|
||||
@ -3,13 +3,295 @@
|
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<title>Counting Iterator</title>
|
||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
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|
||||
<div class="document" id="counting-iterator">
|
||||
@ -32,6 +314,9 @@ Railway Operation and Construction</a></td></tr>
|
||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
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|
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<col class="field-name" />
|
||||
<col class="field-body" />
|
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@ -44,6 +329,9 @@ The counting iterator adaptor adds this crucial piece of
|
||||
functionality to whatever type it wraps. One can use the
|
||||
counting iterator adaptor not only with integer types, but with
|
||||
any incrementable type.</p>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<p class="last"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> adapts an object by adding an <tt class="docutils literal"><span class="pre">operator*</span></tt> that
|
||||
returns the current value of the object. All other iterator operations
|
||||
are forwarded to the adapted object.</p>
|
||||
@ -51,8 +339,8 @@ are forwarded to the adapted object.</p>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#counting-iterator-synopsis" id="id2" name="id2"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> synopsis</a></li>
|
||||
<li><a class="reference" href="#counting-iterator-requirements" id="id3" name="id3"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> requirements</a></li>
|
||||
@ -61,8 +349,11 @@ are forwarded to the adapted object.</p>
|
||||
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="counting-iterator-synopsis">
|
||||
<h1><a class="toc-backref" href="#id2" name="counting-iterator-synopsis"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> synopsis</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id2" id="counting-iterator-synopsis" name="counting-iterator-synopsis"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> synopsis</a></h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template <
|
||||
class Incrementable
|
||||
@ -102,7 +393,7 @@ else if (numeric_limits<Incrementable>::is_specialized)
|
||||
random_access_traversal_tag, Incrementable, const Incrementable&)
|
||||
else
|
||||
return <a class="reference" href="iterator_facade.html#iterator-category"><em>iterator-category</em></a>(
|
||||
iterator_traversal<Incrementable>::type,
|
||||
iterator_traversal<Incrementable>::type,
|
||||
Incrementable, const Incrementable&)
|
||||
</pre>
|
||||
<dl class="docutils">
|
||||
@ -112,8 +403,8 @@ the cases where <tt class="docutils literal"><span class="pre">std::numeric_limi
|
||||
is true.]</dd>
|
||||
</dl>
|
||||
</div>
|
||||
<div class="section" id="counting-iterator-requirements">
|
||||
<h1><a class="toc-backref" href="#id3" name="counting-iterator-requirements"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> requirements</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id3" id="counting-iterator-requirements" name="counting-iterator-requirements"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> requirements</a></h1>
|
||||
<p>The <tt class="docutils literal"><span class="pre">Incrementable</span></tt> argument shall be Copy Constructible and Assignable.</p>
|
||||
<p>If <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible to <tt class="docutils literal"><span class="pre">forward_iterator_tag</span></tt>
|
||||
or <tt class="docutils literal"><span class="pre">forward_traversal_tag</span></tt>, the following must be well-formed:</p>
|
||||
@ -138,8 +429,8 @@ n = i - j;
|
||||
i < j;
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section" id="counting-iterator-models">
|
||||
<h1><a class="toc-backref" href="#id4" name="counting-iterator-models"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> models</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id4" id="counting-iterator-models" name="counting-iterator-models"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> models</a></h1>
|
||||
<p>Specializations of <tt class="docutils literal"><span class="pre">counting_iterator</span></tt> model Readable Lvalue
|
||||
Iterator. In addition, they model the concepts corresponding to the
|
||||
iterator tags to which their <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible.
|
||||
@ -154,8 +445,8 @@ concepts modeled by <tt class="docutils literal"><span class="pre">Incrementable
|
||||
<tt class="docutils literal"><span class="pre">counting_iterator<Y,C2,D2></span></tt> if and only if <tt class="docutils literal"><span class="pre">X</span></tt> is
|
||||
interoperable with <tt class="docutils literal"><span class="pre">Y</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="counting-iterator-operations">
|
||||
<h1><a class="toc-backref" href="#id5" name="counting-iterator-operations"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> operations</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id5" id="counting-iterator-operations" name="counting-iterator-operations"><tt class="docutils literal"><span class="pre">counting_iterator</span></tt> operations</a></h1>
|
||||
<p>In addition to the operations required by the concepts modeled by
|
||||
<tt class="docutils literal"><span class="pre">counting_iterator</span></tt>, <tt class="docutils literal"><span class="pre">counting_iterator</span></tt> provides the following
|
||||
operations.</p>
|
||||
@ -228,6 +519,9 @@ operations.</p>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template <class Incrementable>
|
||||
counting_iterator<Incrementable> make_counting_iterator(Incrementable x);
|
||||
@ -241,9 +535,12 @@ with <tt class="docutils literal"><span class="pre">current</span></tt> construc
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
</div>
|
||||
<div class="section" id="example">
|
||||
<h1><a class="toc-backref" href="#id6" name="example">Example</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id6" id="example" name="example">Example</a></h1>
|
||||
<p>This example fills an array with numbers and a second array with
|
||||
pointers into the first array, using <tt class="docutils literal"><span class="pre">counting_iterator</span></tt> for both
|
||||
tasks. Finally <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> is used to print out the numbers
|
||||
@ -261,7 +558,7 @@ std::copy(boost::make_counting_iterator(numbers.begin()),
|
||||
boost::make_counting_iterator(numbers.end()),
|
||||
std::back_inserter(pointers));
|
||||
|
||||
std::cout << "indirectly printing out the numbers from 0 to "
|
||||
std::cout << "indirectly printing out the numbers from 0 to "
|
||||
<< N << std::endl;
|
||||
std::copy(boost::make_indirect_iterator(pointers.begin()),
|
||||
boost::make_indirect_iterator(pointers.end()),
|
||||
@ -271,15 +568,10 @@ std::cout << std::endl;
|
||||
<p>The output is:</p>
|
||||
<pre class="literal-block">
|
||||
indirectly printing out the numbers from 0 to 7
|
||||
0 1 2 3 4 5 6
|
||||
0 1 2 3 4 5 6
|
||||
</pre>
|
||||
<p>The source code for this example can be found <a class="reference" href="../example/counting_iterator_example.cpp">here</a>.</p>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="counting_iterator.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
+++++++++++++++++++
|
||||
Counting Iterator
|
||||
+++++++++++++++++++
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
``counting_iterator`` adapts an object by adding an ``operator*`` that
|
||||
returns the current value of the object. All other iterator operations
|
||||
are forwarded to the adapted object.
|
||||
|
||||
@ -1,3 +1,6 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Example
|
||||
.......
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
::
|
||||
|
||||
template <
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
+++++++++++++++++++++++++++++
|
||||
Iterator Facade and Adaptor
|
||||
+++++++++++++++++++++++++++++
|
||||
|
||||
@ -3,15 +3,298 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||
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|
||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
||||
<title>Filter Iterator</title>
|
||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, University of Hanover Institute for Transport Railway Operation and Construction" />
|
||||
<meta name="date" content="2004-11-01" />
|
||||
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003." />
|
||||
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||||
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|
||||
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||||
/*
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||||
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||||
:Contact: goodger@users.sourceforge.net
|
||||
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|
||||
:Revision: $Revision$
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||||
:Copyright: This stylesheet has been placed in the public domain.
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||||
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||||
Default cascading style sheet for the HTML output of Docutils.
|
||||
|
||||
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|
||||
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|
||||
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|
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|
||||
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|
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|
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|
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|
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|
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|
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|
||||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||||
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|
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|
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|
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|
||||
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|
||||
|
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|
||||
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|
||||
|
||||
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|
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|
||||
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||||
|
||||
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|
||||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||||
|
||||
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|
||||
</head>
|
||||
<body>
|
||||
<div class="document" id="filter-iterator">
|
||||
<h1 class="title">Filter Iterator</h1>
|
||||
<table class="docinfo" frame="void" rules="none">
|
||||
<col class="docinfo-name" />
|
||||
@ -31,16 +314,21 @@ Railway Operation and Construction</a></td></tr>
|
||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="document" id="filter-iterator">
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The filter iterator adaptor creates a view of an iterator range in
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
The filter iterator adaptor creates a view of an iterator range in
|
||||
which some elements of the range are skipped. A predicate function
|
||||
object controls which elements are skipped. When the predicate is
|
||||
applied to an element, if it returns <tt class="literal"><span class="pre">true</span></tt> then the element is
|
||||
retained and if it returns <tt class="literal"><span class="pre">false</span></tt> then the element is skipped
|
||||
applied to an element, if it returns <tt class="docutils literal"><span class="pre">true</span></tt> then the element is
|
||||
retained and if it returns <tt class="docutils literal"><span class="pre">false</span></tt> then the element is skipped
|
||||
over. When skipping over elements, it is necessary for the filter
|
||||
adaptor to know when to stop so as to avoid going past the end of the
|
||||
underlying range. A filter iterator is therefore constructed with pair
|
||||
@ -49,22 +337,22 @@ sequence to be traversed.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#filter-iterator-synopsis" id="id3" name="id3"><tt class="literal"><span class="pre">filter_iterator</span></tt> synopsis</a></li>
|
||||
<li><a class="reference" href="#filter-filter-iterator" id="id4" name="id4"><tt class="literal"><span class="pre">filter_iterator</span></tt> requirements</a></li>
|
||||
<li><a class="reference" href="#filter-iterator-models" id="id5" name="id5"><tt class="literal"><span class="pre">filter_iterator</span></tt> models</a></li>
|
||||
<li><a class="reference" href="#id1" id="id6" name="id6"><tt class="literal"><span class="pre">filter_iterator</span></tt> operations</a></li>
|
||||
<li><a class="reference" href="#example" id="id7" name="id7">Example</a></li>
|
||||
<li><a class="reference" href="#filter-iterator-synopsis" id="id2" name="id2"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> synopsis</a></li>
|
||||
<li><a class="reference" href="#filter-iterator-requirements" id="id3" name="id3"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> requirements</a></li>
|
||||
<li><a class="reference" href="#filter-iterator-models" id="id4" name="id4"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models</a></li>
|
||||
<li><a class="reference" href="#filter-iterator-operations" id="id5" name="id5"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> operations</a></li>
|
||||
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="filter-iterator-synopsis">
|
||||
<h1><a class="toc-backref" href="#id3" name="filter-iterator-synopsis"><tt class="literal"><span class="pre">filter_iterator</span></tt> synopsis</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id2" id="filter-iterator-synopsis" name="filter-iterator-synopsis"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> synopsis</a></h1>
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt -->
|
||||
<!-- 2004. Use, modification and distribution is subject to the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying file -->
|
||||
<!-- LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<!-- LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template <class Predicate, class Iterator>
|
||||
class filter_iterator
|
||||
@ -95,39 +383,39 @@ private:
|
||||
Iterator m_end; // exposition only
|
||||
};
|
||||
</pre>
|
||||
<p>If <tt class="literal"><span class="pre">Iterator</span></tt> models Readable Lvalue Iterator and Bidirectional Traversal
|
||||
Iterator then <tt class="literal"><span class="pre">iterator_category</span></tt> is convertible to
|
||||
<tt class="literal"><span class="pre">std::bidirectional_iterator_tag</span></tt>.
|
||||
Otherwise, if <tt class="literal"><span class="pre">Iterator</span></tt> models Readable Lvalue Iterator and Forward Traversal
|
||||
Iterator then <tt class="literal"><span class="pre">iterator_category</span></tt> is convertible to
|
||||
<tt class="literal"><span class="pre">std::forward_iterator_tag</span></tt>.
|
||||
Otherwise <tt class="literal"><span class="pre">iterator_category</span></tt> is
|
||||
convertible to <tt class="literal"><span class="pre">std::input_iterator_tag</span></tt>.</p>
|
||||
<p>If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models Readable Lvalue Iterator and Bidirectional Traversal
|
||||
Iterator then <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible to
|
||||
<tt class="docutils literal"><span class="pre">std::bidirectional_iterator_tag</span></tt>.
|
||||
Otherwise, if <tt class="docutils literal"><span class="pre">Iterator</span></tt> models Readable Lvalue Iterator and Forward Traversal
|
||||
Iterator then <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible to
|
||||
<tt class="docutils literal"><span class="pre">std::forward_iterator_tag</span></tt>.
|
||||
Otherwise <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is
|
||||
convertible to <tt class="docutils literal"><span class="pre">std::input_iterator_tag</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="filter-filter-iterator">
|
||||
<h1><a class="toc-backref" href="#id4" name="filter-filter-iterator"><tt class="literal"><span class="pre">filter_iterator</span></tt> requirements</a></h1>
|
||||
<p>The <tt class="literal"><span class="pre">Iterator</span></tt> argument shall meet the requirements of Readable
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id3" id="filter-iterator-requirements" name="filter-iterator-requirements"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> requirements</a></h1>
|
||||
<p>The <tt class="docutils literal"><span class="pre">Iterator</span></tt> argument shall meet the requirements of Readable
|
||||
Iterator and Single Pass Iterator or it shall meet the requirements of
|
||||
Input Iterator.</p>
|
||||
<p>The <tt class="literal"><span class="pre">Predicate</span></tt> argument must be Assignable, Copy Constructible, and
|
||||
the expression <tt class="literal"><span class="pre">p(x)</span></tt> must be valid where <tt class="literal"><span class="pre">p</span></tt> is an object of type
|
||||
<tt class="literal"><span class="pre">Predicate</span></tt>, <tt class="literal"><span class="pre">x</span></tt> is an object of type
|
||||
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, and where the type of
|
||||
<tt class="literal"><span class="pre">p(x)</span></tt> must be convertible to <tt class="literal"><span class="pre">bool</span></tt>.</p>
|
||||
<p>The <tt class="docutils literal"><span class="pre">Predicate</span></tt> argument must be Assignable, Copy Constructible, and
|
||||
the expression <tt class="docutils literal"><span class="pre">p(x)</span></tt> must be valid where <tt class="docutils literal"><span class="pre">p</span></tt> is an object of type
|
||||
<tt class="docutils literal"><span class="pre">Predicate</span></tt>, <tt class="docutils literal"><span class="pre">x</span></tt> is an object of type
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, and where the type of
|
||||
<tt class="docutils literal"><span class="pre">p(x)</span></tt> must be convertible to <tt class="docutils literal"><span class="pre">bool</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="filter-iterator-models">
|
||||
<h1><a class="toc-backref" href="#id5" name="filter-iterator-models"><tt class="literal"><span class="pre">filter_iterator</span></tt> models</a></h1>
|
||||
<p>The concepts that <tt class="literal"><span class="pre">filter_iterator</span></tt> models are dependent on which
|
||||
concepts the <tt class="literal"><span class="pre">Iterator</span></tt> argument models, as specified in the
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id4" id="filter-iterator-models" name="filter-iterator-models"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models</a></h1>
|
||||
<p>The concepts that <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models are dependent on which
|
||||
concepts the <tt class="docutils literal"><span class="pre">Iterator</span></tt> argument models, as specified in the
|
||||
following tables.</p>
|
||||
<table border="1" class="table">
|
||||
<table border="1" class="docutils">
|
||||
<colgroup>
|
||||
<col width="44%" />
|
||||
<col width="56%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr><th>If <tt class="literal"><span class="pre">Iterator</span></tt> models</th>
|
||||
<th>then <tt class="literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||
<tr><th class="head">If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models</th>
|
||||
<th class="head">then <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody valign="top">
|
||||
@ -142,14 +430,14 @@ following tables.</p>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<table border="1" class="table">
|
||||
<table border="1" class="docutils">
|
||||
<colgroup>
|
||||
<col width="41%" />
|
||||
<col width="59%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr><th>If <tt class="literal"><span class="pre">Iterator</span></tt> models</th>
|
||||
<th>then <tt class="literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||
<tr><th class="head">If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models</th>
|
||||
<th class="head">then <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody valign="top">
|
||||
@ -164,14 +452,14 @@ following tables.</p>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<table border="1" class="table">
|
||||
<table border="1" class="docutils">
|
||||
<colgroup>
|
||||
<col width="63%" />
|
||||
<col width="38%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr><th>If <tt class="literal"><span class="pre">Iterator</span></tt> models</th>
|
||||
<th>then <tt class="literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||
<tr><th class="head">If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models</th>
|
||||
<th class="head">then <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody valign="top">
|
||||
@ -189,49 +477,49 @@ following tables.</p>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">filter_iterator<P1,</span> <span class="pre">X></span></tt> is interoperable with <tt class="literal"><span class="pre">filter_iterator<P2,</span> <span class="pre">Y></span></tt>
|
||||
if and only if <tt class="literal"><span class="pre">X</span></tt> is interoperable with <tt class="literal"><span class="pre">Y</span></tt>.</p>
|
||||
<p><tt class="docutils literal"><span class="pre">filter_iterator<P1,</span> <span class="pre">X></span></tt> is interoperable with <tt class="docutils literal"><span class="pre">filter_iterator<P2,</span> <span class="pre">Y></span></tt>
|
||||
if and only if <tt class="docutils literal"><span class="pre">X</span></tt> is interoperable with <tt class="docutils literal"><span class="pre">Y</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="id1">
|
||||
<h1><a class="toc-backref" href="#id6" name="id1"><tt class="literal"><span class="pre">filter_iterator</span></tt> operations</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id5" id="filter-iterator-operations" name="filter-iterator-operations"><tt class="docutils literal"><span class="pre">filter_iterator</span></tt> operations</a></h1>
|
||||
<p>In addition to those operations required by the concepts that
|
||||
<tt class="literal"><span class="pre">filter_iterator</span></tt> models, <tt class="literal"><span class="pre">filter_iterator</span></tt> provides the following
|
||||
<tt class="docutils literal"><span class="pre">filter_iterator</span></tt> models, <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> provides the following
|
||||
operations.</p>
|
||||
<p><tt class="literal"><span class="pre">filter_iterator();</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">filter_iterator();</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Predicate</span></tt> and <tt class="literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Predicate</span></tt> and <tt class="docutils literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="literal"><span class="pre">filter_iterator</span></tt> whose``m_pred``, <tt class="literal"><span class="pre">m_iter</span></tt>, and <tt class="literal"><span class="pre">m_end</span></tt>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> whose``m_pred``, <tt class="docutils literal"><span class="pre">m_iter</span></tt>, and <tt class="docutils literal"><span class="pre">m_end</span></tt>
|
||||
members are a default constructed.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">filter_iterator(Predicate</span> <span class="pre">f,</span> <span class="pre">Iterator</span> <span class="pre">x,</span> <span class="pre">Iterator</span> <span class="pre">end</span> <span class="pre">=</span> <span class="pre">Iterator());</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">filter_iterator(Predicate</span> <span class="pre">f,</span> <span class="pre">Iterator</span> <span class="pre">x,</span> <span class="pre">Iterator</span> <span class="pre">end</span> <span class="pre">=</span> <span class="pre">Iterator());</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="literal"><span class="pre">filter_iterator</span></tt> where <tt class="literal"><span class="pre">m_iter</span></tt> is either
|
||||
the first position in the range <tt class="literal"><span class="pre">[x,end)</span></tt> such that <tt class="literal"><span class="pre">f(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>
|
||||
or else``m_iter == end``. The member <tt class="literal"><span class="pre">m_pred</span></tt> is constructed from
|
||||
<tt class="literal"><span class="pre">f</span></tt> and <tt class="literal"><span class="pre">m_end</span></tt> from <tt class="literal"><span class="pre">end</span></tt>.</td>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> where <tt class="docutils literal"><span class="pre">m_iter</span></tt> is either
|
||||
the first position in the range <tt class="docutils literal"><span class="pre">[x,end)</span></tt> such that <tt class="docutils literal"><span class="pre">f(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>
|
||||
or else``m_iter == end``. The member <tt class="docutils literal"><span class="pre">m_pred</span></tt> is constructed from
|
||||
<tt class="docutils literal"><span class="pre">f</span></tt> and <tt class="docutils literal"><span class="pre">m_end</span></tt> from <tt class="docutils literal"><span class="pre">end</span></tt>.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">filter_iterator(Iterator</span> <span class="pre">x,</span> <span class="pre">Iterator</span> <span class="pre">end</span> <span class="pre">=</span> <span class="pre">Iterator());</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">filter_iterator(Iterator</span> <span class="pre">x,</span> <span class="pre">Iterator</span> <span class="pre">end</span> <span class="pre">=</span> <span class="pre">Iterator());</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Predicate</span></tt> must be Default Constructible and
|
||||
<tt class="literal"><span class="pre">Predicate</span></tt> is a class type (not a function pointer).</td>
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Predicate</span></tt> must be Default Constructible and
|
||||
<tt class="docutils literal"><span class="pre">Predicate</span></tt> is a class type (not a function pointer).</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="literal"><span class="pre">filter_iterator</span></tt> where <tt class="literal"><span class="pre">m_iter</span></tt> is either
|
||||
the first position in the range <tt class="literal"><span class="pre">[x,end)</span></tt> such that <tt class="literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>
|
||||
or else``m_iter == end``. The member <tt class="literal"><span class="pre">m_pred</span></tt> is default constructed.</td>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> where <tt class="docutils literal"><span class="pre">m_iter</span></tt> is either
|
||||
the first position in the range <tt class="docutils literal"><span class="pre">[x,end)</span></tt> such that <tt class="docutils literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>
|
||||
or else``m_iter == end``. The member <tt class="docutils literal"><span class="pre">m_pred</span></tt> is default constructed.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
@ -242,71 +530,74 @@ filter_iterator(
|
||||
, typename enable_if_convertible<OtherIterator, Iterator>::type* = 0 // exposition
|
||||
);``
|
||||
</pre>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">OtherIterator</span></tt> is implicitly convertible to <tt class="literal"><span class="pre">Iterator</span></tt>.</td>
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">OtherIterator</span></tt> is implicitly convertible to <tt class="docutils literal"><span class="pre">Iterator</span></tt>.</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a filter iterator whose members are copied from <tt class="literal"><span class="pre">t</span></tt>.</td>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs a filter iterator whose members are copied from <tt class="docutils literal"><span class="pre">t</span></tt>.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">Predicate</span> <span class="pre">predicate()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">Predicate</span> <span class="pre">predicate()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_pred</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_pred</span></tt></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">Iterator</span> <span class="pre">end()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">Iterator</span> <span class="pre">end()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_end</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_end</span></tt></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">Iterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">Iterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_iterator</span></tt></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*m_iter</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*m_iter</span></tt></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">filter_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">filter_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Increments <tt class="literal"><span class="pre">m_iter</span></tt> and then continues to
|
||||
increment <tt class="literal"><span class="pre">m_iter</span></tt> until either <tt class="literal"><span class="pre">m_iter</span> <span class="pre">==</span> <span class="pre">m_end</span></tt>
|
||||
or <tt class="literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>.</td>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Increments <tt class="docutils literal"><span class="pre">m_iter</span></tt> and then continues to
|
||||
increment <tt class="docutils literal"><span class="pre">m_iter</span></tt> until either <tt class="docutils literal"><span class="pre">m_iter</span> <span class="pre">==</span> <span class="pre">m_end</span></tt>
|
||||
or <tt class="docutils literal"><span class="pre">m_pred(*m_iter)</span> <span class="pre">==</span> <span class="pre">true</span></tt>.</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template <class Predicate, class Iterator>
|
||||
filter_iterator<Predicate,Iterator>
|
||||
make_filter_iterator(Predicate f, Iterator x, Iterator end = Iterator());
|
||||
</pre>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
@ -319,7 +610,7 @@ template <class Predicate, class Iterator>
|
||||
filter_iterator<Predicate,Iterator>
|
||||
make_filter_iterator(Iterator x, Iterator end = Iterator());
|
||||
</pre>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
@ -327,13 +618,16 @@ make_filter_iterator(Iterator x, Iterator end = Iterator());
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
</div>
|
||||
<div class="section" id="example">
|
||||
<h1><a class="toc-backref" href="#id7" name="example">Example</a></h1>
|
||||
<p>This example uses <tt class="literal"><span class="pre">filter_iterator</span></tt> and then
|
||||
<tt class="literal"><span class="pre">make_filter_iterator</span></tt> to output only the positive integers from an
|
||||
array of integers. Then <tt class="literal"><span class="pre">make_filter_iterator</span></tt> is is used to output
|
||||
the integers greater than <tt class="literal"><span class="pre">-2</span></tt>.</p>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id6" id="example" name="example">Example</a></h1>
|
||||
<p>This example uses <tt class="docutils literal"><span class="pre">filter_iterator</span></tt> and then
|
||||
<tt class="docutils literal"><span class="pre">make_filter_iterator</span></tt> to output only the positive integers from an
|
||||
array of integers. Then <tt class="docutils literal"><span class="pre">make_filter_iterator</span></tt> is is used to output
|
||||
the integers greater than <tt class="docutils literal"><span class="pre">-2</span></tt>.</p>
|
||||
<pre class="literal-block">
|
||||
struct is_positive_number {
|
||||
bool operator()(int x) { return 0 < x; }
|
||||
@ -384,17 +678,12 @@ int main()
|
||||
</pre>
|
||||
<p>The output is:</p>
|
||||
<pre class="literal-block">
|
||||
4 5 8
|
||||
4 5 8
|
||||
0 -1 4 5 8
|
||||
4 5 8
|
||||
4 5 8
|
||||
0 -1 4 5 8
|
||||
</pre>
|
||||
<p>The source code for this example can be found <a class="reference" href="../example/filter_iterator_example.cpp">here</a>.</p>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="filter_iterator.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
+++++++++++++++++
|
||||
Filter Iterator
|
||||
+++++++++++++++++
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
The filter iterator adaptor creates a view of an iterator range in
|
||||
which some elements of the range are skipped. A predicate function
|
||||
object controls which elements are skipped. When the predicate is
|
||||
|
||||
@ -1,3 +1,6 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Example
|
||||
.......
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
The function output iterator adaptor makes it easier to create custom
|
||||
output iterators. The adaptor takes a unary function and creates a
|
||||
model of Output Iterator. Each item assigned to the output iterator is
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Header
|
||||
......
|
||||
|
||||
|
||||
@ -3,13 +3,295 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||
<head>
|
||||
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|
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|
||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
||||
<title>Function Output Iterator</title>
|
||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, University of Hanover Institute for Transport Railway Operation and Construction" />
|
||||
<meta name="date" content="2004-11-01" />
|
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|
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Default cascading style sheet for the HTML output of Docutils.
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|
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|
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|
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|
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|
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<body>
|
||||
<div class="document" id="function-output-iterator">
|
||||
@ -32,11 +314,17 @@ Railway Operation and Construction</a></td></tr>
|
||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The function output iterator adaptor makes it easier to create custom
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
The function output iterator adaptor makes it easier to create custom
|
||||
output iterators. The adaptor takes a unary function and creates a
|
||||
model of Output Iterator. Each item assigned to the output iterator is
|
||||
passed as an argument to the unary function. The motivation for this
|
||||
@ -46,8 +334,8 @@ proxy object.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#header" id="id1" name="id1">Header</a></li>
|
||||
<li><a class="reference" href="#function-output-iterator-requirements" id="id2" name="id2"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> requirements</a></li>
|
||||
@ -56,8 +344,11 @@ proxy object.</td>
|
||||
<li><a class="reference" href="#example" id="id5" name="id5">Example</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="header">
|
||||
<h1><a class="toc-backref" href="#id1" name="header">Header</a></h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id1" id="header" name="header">Header</a></h1>
|
||||
<pre class="literal-block">
|
||||
#include <boost/function_output_iterator.hpp>
|
||||
</pre>
|
||||
@ -83,23 +374,23 @@ private:
|
||||
};
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section" id="function-output-iterator-requirements">
|
||||
<h1><a class="toc-backref" href="#id2" name="function-output-iterator-requirements"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> requirements</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id2" id="function-output-iterator-requirements" name="function-output-iterator-requirements"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> requirements</a></h1>
|
||||
<p><tt class="docutils literal"><span class="pre">UnaryFunction</span></tt> must be Assignable and Copy Constructible.</p>
|
||||
</div>
|
||||
<div class="section" id="function-output-iterator-models">
|
||||
<h1><a class="toc-backref" href="#id3" name="function-output-iterator-models"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> models</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id3" id="function-output-iterator-models" name="function-output-iterator-models"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> models</a></h1>
|
||||
<p><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> is a model of the Writable and
|
||||
Incrementable Iterator concepts.</p>
|
||||
</div>
|
||||
<div class="section" id="function-output-iterator-operations">
|
||||
<h1><a class="toc-backref" href="#id4" name="function-output-iterator-operations"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> operations</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id4" id="function-output-iterator-operations" name="function-output-iterator-operations"><tt class="docutils literal"><span class="pre">function_output_iterator</span></tt> operations</a></h1>
|
||||
<p><tt class="docutils literal"><span class="pre">explicit</span> <span class="pre">function_output_iterator(const</span> <span class="pre">UnaryFunction&</span> <span class="pre">f</span> <span class="pre">=</span> <span class="pre">UnaryFunction());</span></tt></p>
|
||||
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|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">function_output_iterator</span></tt>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">function_output_iterator</span></tt>
|
||||
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|
||||
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|
||||
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|
||||
@ -132,9 +423,12 @@ is equivalent to <tt class="docutils literal"><span class="pre">m_f(t)</span></t
|
||||
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|
||||
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|
||||
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|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
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|
||||
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||||
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|
||||
<h1><a class="toc-backref" href="#id5" id="example" name="example">Example</a></h1>
|
||||
<pre class="literal-block">
|
||||
struct string_appender
|
||||
{
|
||||
@ -159,7 +453,7 @@ int main(int, char*[])
|
||||
x.push_back("!");
|
||||
|
||||
std::string s = "";
|
||||
std::copy(x.begin(), x.end(),
|
||||
std::copy(x.begin(), x.end(),
|
||||
boost::make_function_output_iterator(string_appender(s)));
|
||||
|
||||
std::cout << s << std::endl;
|
||||
@ -169,10 +463,5 @@ int main(int, char*[])
|
||||
</pre>
|
||||
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|
||||
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|
||||
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<a class="reference" href="function_output_iterator.rst">View document source</a>.
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||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
++++++++++++++++++++++++++
|
||||
Function Output Iterator
|
||||
++++++++++++++++++++++++++
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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Example
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.......
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332
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<!-- Distributed under the Boost -->
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|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents"><strong>Table of Contents</strong></a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents"><strong>Table of Contents</strong></a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#new-style-iterators" id="id22" name="id22">New-Style Iterators</a></li>
|
||||
<li><a class="reference" href="#iterator-facade-and-adaptor" id="id23" name="id23">Iterator Facade and Adaptor</a></li>
|
||||
@ -66,8 +351,8 @@ older Boost Iterator Adaptor Library.</td>
|
||||
</ul>
|
||||
</div>
|
||||
<hr class="docutils" />
|
||||
<div class="section" id="new-style-iterators">
|
||||
<h1><a class="toc-backref" href="#id22" name="new-style-iterators">New-Style Iterators</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id22" id="new-style-iterators" name="new-style-iterators">New-Style Iterators</a></h1>
|
||||
<p>The iterator categories defined in C++98 are extremely limiting
|
||||
because they bind together two orthogonal concepts: traversal and
|
||||
element access. For example, because a random access iterator is
|
||||
@ -85,8 +370,8 @@ concepts, see our</p>
|
||||
<blockquote>
|
||||
<a class="reference" href="new-iter-concepts.html">Standard Proposal For New-Style Iterators</a> (<a class="reference" href="new-iter-concepts.pdf">PDF</a>)</blockquote>
|
||||
</div>
|
||||
<div class="section" id="iterator-facade-and-adaptor">
|
||||
<h1><a class="toc-backref" href="#id23" name="iterator-facade-and-adaptor">Iterator Facade and Adaptor</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id23" id="iterator-facade-and-adaptor" name="iterator-facade-and-adaptor">Iterator Facade and Adaptor</a></h1>
|
||||
<p>Writing standard-conforming iterators is tricky, but the need comes
|
||||
up often. In order to ease the implementation of new iterators,
|
||||
the Boost.Iterator library provides the <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> class template,
|
||||
@ -112,8 +397,8 @@ and accepted into the first C++ technical report; see our</p>
|
||||
<a class="reference" href="facade-and-adaptor.html">Standard Proposal For Iterator Facade and Adaptor</a> (<a class="reference" href="facade-and-adaptor.pdf">PDF</a>)</blockquote>
|
||||
<p>for more details.</p>
|
||||
</div>
|
||||
<div class="section" id="specialized-adaptors">
|
||||
<h1><a class="toc-backref" href="#id24" name="specialized-adaptors">Specialized Adaptors</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id24" id="specialized-adaptors" name="specialized-adaptors">Specialized Adaptors</a></h1>
|
||||
<p>The iterator library supplies a useful suite of standard-conforming
|
||||
iterator templates based on the Boost <a class="reference" href="#iterator-facade-and-adaptor">iterator facade and adaptor</a>.</p>
|
||||
<ul class="simple">
|
||||
@ -141,10 +426,10 @@ underlying sequence. This component also replaces the old
|
||||
positions of heterogeneous underlying iterators.</li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="iterator-utilities">
|
||||
<h1><a class="toc-backref" href="#id25" name="iterator-utilities">Iterator Utilities</a></h1>
|
||||
<div class="section" id="traits">
|
||||
<h2><a class="toc-backref" href="#id26" name="traits">Traits</a></h2>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id25" id="iterator-utilities" name="iterator-utilities">Iterator Utilities</a></h1>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id26" id="traits" name="traits">Traits</a></h2>
|
||||
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|
||||
<li><a class="reference" href="pointee.html"><tt class="docutils literal"><span class="pre">pointee.hpp</span></tt></a> (<a class="reference" href="pointee.pdf">PDF</a>): Provides the capability to deduce the referent types
|
||||
of pointers, smart pointers and iterators in generic code. Used
|
||||
@ -157,17 +442,17 @@ of broken implementations of <tt class="docutils literal"><span class="pre">std:
|
||||
testing iterator interoperability -->
|
||||
<!-- comment! __ interoperable.pdf -->
|
||||
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|
||||
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|
||||
<h2><a class="toc-backref" href="#id27" name="testing-and-concept-checking">Testing and Concept Checking</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id27" id="testing-and-concept-checking" name="testing-and-concept-checking">Testing and Concept Checking</a></h2>
|
||||
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|
||||
<li><a class="reference" href="iterator_concepts.html"><tt class="docutils literal"><span class="pre">iterator_concepts.hpp</span></tt></a> (<a class="reference" href="iterator_concepts.pdf">PDF</a>): Concept checking classes for the new iterator concepts.</li>
|
||||
<li><a class="reference" href="iterator_archetypes.html"><tt class="docutils literal"><span class="pre">iterator_archetypes.hpp</span></tt></a> (<a class="reference" href="iterator_archetypes.pdf">PDF</a>): Concept archetype classes for the new iterators concepts.</li>
|
||||
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|
||||
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|
||||
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|
||||
<div class="section" id="upgrading-from-the-old-boost-iterator-adaptor-library">
|
||||
<h1><a class="toc-backref" href="#id28" name="upgrading-from-the-old-boost-iterator-adaptor-library">Upgrading from the old Boost Iterator Adaptor Library</a></h1>
|
||||
<a class="target" id="upgrading" name="upgrading"></a><p>If you have been using the old Boost Iterator Adaptor library to
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id28" id="upgrading-from-the-old-boost-iterator-adaptor-library" name="upgrading-from-the-old-boost-iterator-adaptor-library">Upgrading from the old Boost Iterator Adaptor Library</a></h1>
|
||||
<p id="upgrading">If you have been using the old Boost Iterator Adaptor library to
|
||||
implement iterators, you probably wrote a <tt class="docutils literal"><span class="pre">Policies</span></tt> class which
|
||||
captures the core operations of your iterator. In the new library
|
||||
design, you'll move those same core operations into the body of the
|
||||
@ -190,8 +475,8 @@ template argument, if explicitly specified) is a true reference
|
||||
type, <tt class="docutils literal"><span class="pre">transform_iterator</span></tt> will behave like
|
||||
<tt class="docutils literal"><span class="pre">projection_iterator</span></tt> used to.</p>
|
||||
</div>
|
||||
<div class="section" id="history">
|
||||
<h1><a class="toc-backref" href="#id29" name="history">History</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id29" id="history" name="history">History</a></h1>
|
||||
<p>In 2000 Dave Abrahams was writing an iterator for a container of
|
||||
pointers, which would access the pointed-to elements when
|
||||
dereferenced. Naturally, being a library writer, he decided to
|
||||
@ -232,10 +517,5 @@ LocalWords: incrementable xxx min prev inplace png oldeqnew AccessTag struct
|
||||
LocalWords: TraversalTag typename lvalues DWA Hmm JGS -->
|
||||
</div>
|
||||
</div>
|
||||
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|
||||
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|
||||
<a class="reference" href="index.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
+++++++++++++++++++++++++++++++++++++++++++++++++
|
||||
The Boost.Iterator Library |(logo)|__
|
||||
+++++++++++++++++++++++++++++++++++++++++++++++++
|
||||
|
||||
@ -3,13 +3,295 @@
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
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@ -32,11 +314,17 @@ Railway Operation and Construction</a></td></tr>
|
||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||
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<!-- Distributed under the Boost -->
|
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<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> adapts an iterator by applying an
|
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<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
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<!-- Software License, Version 1.0. (See accompanying -->
|
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||||
<tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> adapts an iterator by applying an
|
||||
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|
||||
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|
||||
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|
||||
@ -47,8 +335,8 @@ not an iterator.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#indirect-iterator-synopsis" id="id2" name="id2"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> synopsis</a></li>
|
||||
<li><a class="reference" href="#indirect-iterator-requirements" id="id3" name="id3"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> requirements</a></li>
|
||||
@ -57,8 +345,11 @@ not an iterator.</td>
|
||||
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="indirect-iterator-synopsis">
|
||||
<h1><a class="toc-backref" href="#id2" name="indirect-iterator-synopsis"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> synopsis</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id2" id="indirect-iterator-synopsis" name="indirect-iterator-synopsis"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> synopsis</a></h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template <
|
||||
class Iterator
|
||||
@ -115,9 +406,9 @@ if (Reference is use_default) then
|
||||
else
|
||||
typedef Reference reference;
|
||||
|
||||
if (Value is use_default) then
|
||||
if (Value is use_default) then
|
||||
typedef pointee<V>::type* pointer;
|
||||
else
|
||||
else
|
||||
typedef Value* pointer;
|
||||
|
||||
if (Difference is use_default)
|
||||
@ -135,8 +426,8 @@ else
|
||||
) iterator_category;
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section" id="indirect-iterator-requirements">
|
||||
<h1><a class="toc-backref" href="#id3" name="indirect-iterator-requirements"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> requirements</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id3" id="indirect-iterator-requirements" name="indirect-iterator-requirements"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> requirements</a></h1>
|
||||
<p>The expression <tt class="docutils literal"><span class="pre">*v</span></tt>, where <tt class="docutils literal"><span class="pre">v</span></tt> is an object of
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, shall be valid
|
||||
expression and convertible to <tt class="docutils literal"><span class="pre">reference</span></tt>. <tt class="docutils literal"><span class="pre">Iterator</span></tt> shall
|
||||
@ -149,8 +440,8 @@ the requirements indicated by <tt class="docutils literal"><span class="pre">ite
|
||||
parameter is not <tt class="docutils literal"><span class="pre">use_default</span></tt>, as implied by the algorithm for
|
||||
deducing the default for the <tt class="docutils literal"><span class="pre">value_type</span></tt> member.]</p>
|
||||
</div>
|
||||
<div class="section" id="indirect-iterator-models">
|
||||
<h1><a class="toc-backref" href="#id4" name="indirect-iterator-models"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> models</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id4" id="indirect-iterator-models" name="indirect-iterator-models"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> models</a></h1>
|
||||
<p>In addition to the concepts indicated by <tt class="docutils literal"><span class="pre">iterator_category</span></tt>
|
||||
and by <tt class="docutils literal"><span class="pre">iterator_traversal<indirect_iterator>::type</span></tt>, a
|
||||
specialization of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> models the following
|
||||
@ -170,8 +461,8 @@ expression (where <tt class="docutils literal"><span class="pre">t</span></tt> i
|
||||
<tt class="docutils literal"><span class="pre">indirect_iterator<Y,V2,C2,R2,D2></span></tt> if and only if <tt class="docutils literal"><span class="pre">X</span></tt> is
|
||||
interoperable with <tt class="docutils literal"><span class="pre">Y</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="indirect-iterator-operations">
|
||||
<h1><a class="toc-backref" href="#id5" name="indirect-iterator-operations"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> operations</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id5" id="indirect-iterator-operations" name="indirect-iterator-operations"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> operations</a></h1>
|
||||
<p>In addition to the operations required by the concepts described
|
||||
above, specializations of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> provide the
|
||||
following operations.</p>
|
||||
@ -182,7 +473,7 @@ following operations.</p>
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> with
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> with
|
||||
a default-constructed <tt class="docutils literal"><span class="pre">m_iterator</span></tt>.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
@ -215,7 +506,7 @@ indirect_iterator(
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Iterator2</span></tt> is implicitly convertible to <tt class="docutils literal"><span class="pre">Iterator</span></tt>.</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> whose
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> whose
|
||||
<tt class="docutils literal"><span class="pre">m_iterator</span></tt> subobject is constructed from <tt class="docutils literal"><span class="pre">y.base()</span></tt>.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
@ -260,9 +551,12 @@ indirect_iterator(
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
</div>
|
||||
<div class="section" id="example">
|
||||
<h1><a class="toc-backref" href="#id6" name="example">Example</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id6" id="example" name="example">Example</a></h1>
|
||||
<p>This example prints an array of characters, using
|
||||
<tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> to access the array of characters through an
|
||||
array of pointers. Next <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> is used with the
|
||||
@ -309,7 +603,7 @@ std::cout << std::endl;
|
||||
|
||||
// Example of using make_indirect_iterator()
|
||||
|
||||
std::copy(boost::make_indirect_iterator(pointers_to_chars),
|
||||
std::copy(boost::make_indirect_iterator(pointers_to_chars),
|
||||
boost::make_indirect_iterator(pointers_to_chars + N),
|
||||
std::ostream_iterator<char>(std::cout, ","));
|
||||
std::cout << std::endl;
|
||||
@ -323,10 +617,5 @@ a,b,c,d,e,f,g,
|
||||
<p>The source code for this example can be found <a class="reference" href="../example/indirect_iterator_example.cpp">here</a>.</p>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="indirect_iterator.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
+++++++++++++++++++
|
||||
Indirect Iterator
|
||||
+++++++++++++++++++
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
``indirect_iterator`` adapts an iterator by applying an
|
||||
*extra* dereference inside of ``operator*()``. For example, this
|
||||
iterator adaptor makes it possible to view a container of pointers
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Example
|
||||
.......
|
||||
|
||||
|
||||
@ -3,12 +3,297 @@
|
||||
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|
||||
font-size: 100% }
|
||||
|
||||
tt.docutils {
|
||||
background-color: #eeeeee }
|
||||
|
||||
ul.auto-toc {
|
||||
list-style-type: none }
|
||||
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<div class="document">
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template <
|
||||
class Iterator
|
||||
@ -48,9 +333,9 @@ private:
|
||||
Iterator m_iterator; // exposition
|
||||
};
|
||||
</pre>
|
||||
<p>The member types of <tt class="literal"><span class="pre">indirect_iterator</span></tt> are defined according to
|
||||
the following pseudo-code, where <tt class="literal"><span class="pre">V</span></tt> is
|
||||
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt></p>
|
||||
<p>The member types of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> are defined according to
|
||||
the following pseudo-code, where <tt class="docutils literal"><span class="pre">V</span></tt> is
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt></p>
|
||||
<pre class="literal-block">
|
||||
if (Value is use_default) then
|
||||
typedef remove_const<pointee<V>::type>::type value_type;
|
||||
@ -65,9 +350,9 @@ if (Reference is use_default) then
|
||||
else
|
||||
typedef Reference reference;
|
||||
|
||||
if (Value is use_default) then
|
||||
if (Value is use_default) then
|
||||
typedef pointee<V>::type* pointer;
|
||||
else
|
||||
else
|
||||
typedef Value* pointer;
|
||||
|
||||
if (Difference is use_default)
|
||||
@ -84,65 +369,65 @@ else
|
||||
CategoryOrTraversal,``reference``,``value_type``
|
||||
) iterator_category;
|
||||
</pre>
|
||||
<div class="section" id="indirect-iterator-requirements">
|
||||
<h1><a name="indirect-iterator-requirements"><tt class="literal"><span class="pre">indirect_iterator</span></tt> requirements</a></h1>
|
||||
<p>The expression <tt class="literal"><span class="pre">*v</span></tt>, where <tt class="literal"><span class="pre">v</span></tt> is an object of
|
||||
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, shall be valid
|
||||
expression and convertible to <tt class="literal"><span class="pre">reference</span></tt>. <tt class="literal"><span class="pre">Iterator</span></tt> shall
|
||||
model the traversal concept indicated by <tt class="literal"><span class="pre">iterator_category</span></tt>.
|
||||
<tt class="literal"><span class="pre">Value</span></tt>, <tt class="literal"><span class="pre">Reference</span></tt>, and <tt class="literal"><span class="pre">Difference</span></tt> shall be chosen so
|
||||
that <tt class="literal"><span class="pre">value_type</span></tt>, <tt class="literal"><span class="pre">reference</span></tt>, and <tt class="literal"><span class="pre">difference_type</span></tt> meet
|
||||
the requirements indicated by <tt class="literal"><span class="pre">iterator_category</span></tt>.</p>
|
||||
<div class="section">
|
||||
<h1><a id="indirect-iterator-requirements" name="indirect-iterator-requirements"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> requirements</a></h1>
|
||||
<p>The expression <tt class="docutils literal"><span class="pre">*v</span></tt>, where <tt class="docutils literal"><span class="pre">v</span></tt> is an object of
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, shall be valid
|
||||
expression and convertible to <tt class="docutils literal"><span class="pre">reference</span></tt>. <tt class="docutils literal"><span class="pre">Iterator</span></tt> shall
|
||||
model the traversal concept indicated by <tt class="docutils literal"><span class="pre">iterator_category</span></tt>.
|
||||
<tt class="docutils literal"><span class="pre">Value</span></tt>, <tt class="docutils literal"><span class="pre">Reference</span></tt>, and <tt class="docutils literal"><span class="pre">Difference</span></tt> shall be chosen so
|
||||
that <tt class="docutils literal"><span class="pre">value_type</span></tt>, <tt class="docutils literal"><span class="pre">reference</span></tt>, and <tt class="docutils literal"><span class="pre">difference_type</span></tt> meet
|
||||
the requirements indicated by <tt class="docutils literal"><span class="pre">iterator_category</span></tt>.</p>
|
||||
<p>[Note: there are further requirements on the
|
||||
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt> if the <tt class="literal"><span class="pre">Value</span></tt>
|
||||
parameter is not <tt class="literal"><span class="pre">use_default</span></tt>, as implied by the algorithm for
|
||||
deducing the default for the <tt class="literal"><span class="pre">value_type</span></tt> member.]</p>
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt> if the <tt class="docutils literal"><span class="pre">Value</span></tt>
|
||||
parameter is not <tt class="docutils literal"><span class="pre">use_default</span></tt>, as implied by the algorithm for
|
||||
deducing the default for the <tt class="docutils literal"><span class="pre">value_type</span></tt> member.]</p>
|
||||
</div>
|
||||
<div class="section" id="indirect-iterator-models">
|
||||
<h1><a name="indirect-iterator-models"><tt class="literal"><span class="pre">indirect_iterator</span></tt> models</a></h1>
|
||||
<p>In addition to the concepts indicated by <tt class="literal"><span class="pre">iterator_category</span></tt>
|
||||
and by <tt class="literal"><span class="pre">iterator_traversal<indirect_iterator>::type</span></tt>, a
|
||||
specialization of <tt class="literal"><span class="pre">indirect_iterator</span></tt> models the following
|
||||
concepts, Where <tt class="literal"><span class="pre">v</span></tt> is an object of
|
||||
<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>:</p>
|
||||
<div class="section">
|
||||
<h1><a id="indirect-iterator-models" name="indirect-iterator-models"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> models</a></h1>
|
||||
<p>In addition to the concepts indicated by <tt class="docutils literal"><span class="pre">iterator_category</span></tt>
|
||||
and by <tt class="docutils literal"><span class="pre">iterator_traversal<indirect_iterator>::type</span></tt>, a
|
||||
specialization of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> models the following
|
||||
concepts, Where <tt class="docutils literal"><span class="pre">v</span></tt> is an object of
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>:</p>
|
||||
<blockquote>
|
||||
<ul class="simple">
|
||||
<li>Readable Iterator if <tt class="literal"><span class="pre">reference(*v)</span></tt> is convertible to
|
||||
<tt class="literal"><span class="pre">value_type</span></tt>.</li>
|
||||
<li>Writable Iterator if <tt class="literal"><span class="pre">reference(*v)</span> <span class="pre">=</span> <span class="pre">t</span></tt> is a valid
|
||||
expression (where <tt class="literal"><span class="pre">t</span></tt> is an object of type
|
||||
<tt class="literal"><span class="pre">indirect_iterator::value_type</span></tt>)</li>
|
||||
<li>Lvalue Iterator if <tt class="literal"><span class="pre">reference</span></tt> is a reference type.</li>
|
||||
<li>Readable Iterator if <tt class="docutils literal"><span class="pre">reference(*v)</span></tt> is convertible to
|
||||
<tt class="docutils literal"><span class="pre">value_type</span></tt>.</li>
|
||||
<li>Writable Iterator if <tt class="docutils literal"><span class="pre">reference(*v)</span> <span class="pre">=</span> <span class="pre">t</span></tt> is a valid
|
||||
expression (where <tt class="docutils literal"><span class="pre">t</span></tt> is an object of type
|
||||
<tt class="docutils literal"><span class="pre">indirect_iterator::value_type</span></tt>)</li>
|
||||
<li>Lvalue Iterator if <tt class="docutils literal"><span class="pre">reference</span></tt> is a reference type.</li>
|
||||
</ul>
|
||||
</blockquote>
|
||||
<p><tt class="literal"><span class="pre">indirect_iterator<X,V1,C1,R1,D1></span></tt> is interoperable with
|
||||
<tt class="literal"><span class="pre">indirect_iterator<Y,V2,C2,R2,D2></span></tt> if and only if <tt class="literal"><span class="pre">X</span></tt> is
|
||||
interoperable with <tt class="literal"><span class="pre">Y</span></tt>.</p>
|
||||
<p><tt class="docutils literal"><span class="pre">indirect_iterator<X,V1,C1,R1,D1></span></tt> is interoperable with
|
||||
<tt class="docutils literal"><span class="pre">indirect_iterator<Y,V2,C2,R2,D2></span></tt> if and only if <tt class="docutils literal"><span class="pre">X</span></tt> is
|
||||
interoperable with <tt class="docutils literal"><span class="pre">Y</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="indirect-iterator-operations">
|
||||
<h1><a name="indirect-iterator-operations"><tt class="literal"><span class="pre">indirect_iterator</span></tt> operations</a></h1>
|
||||
<div class="section">
|
||||
<h1><a id="indirect-iterator-operations" name="indirect-iterator-operations"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> operations</a></h1>
|
||||
<p>In addition to the operations required by the concepts described
|
||||
above, specializations of <tt class="literal"><span class="pre">indirect_iterator</span></tt> provide the
|
||||
above, specializations of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> provide the
|
||||
following operations.</p>
|
||||
<p><tt class="literal"><span class="pre">indirect_iterator();</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">indirect_iterator();</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="literal"><span class="pre">indirect_iterator</span></tt> with
|
||||
a default-constructed <tt class="literal"><span class="pre">m_iterator</span></tt>.</td>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> with
|
||||
a default-constructed <tt class="docutils literal"><span class="pre">m_iterator</span></tt>.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">indirect_iterator(Iterator</span> <span class="pre">x);</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">indirect_iterator(Iterator</span> <span class="pre">x);</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="literal"><span class="pre">indirect_iterator</span></tt> with
|
||||
<tt class="literal"><span class="pre">m_iterator</span></tt> copy constructed from <tt class="literal"><span class="pre">x</span></tt>.</td>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> with
|
||||
<tt class="docutils literal"><span class="pre">m_iterator</span></tt> copy constructed from <tt class="docutils literal"><span class="pre">x</span></tt>.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
@ -158,63 +443,58 @@ indirect_iterator(
|
||||
, typename enable_if_convertible<Iterator2, Iterator>::type* = 0 // exposition
|
||||
);
|
||||
</pre>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="literal"><span class="pre">Iterator2</span></tt> is implicitly convertible to <tt class="literal"><span class="pre">Iterator</span></tt>.</td>
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Iterator2</span></tt> is implicitly convertible to <tt class="docutils literal"><span class="pre">Iterator</span></tt>.</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="literal"><span class="pre">indirect_iterator</span></tt> whose
|
||||
<tt class="literal"><span class="pre">m_iterator</span></tt> subobject is constructed from <tt class="literal"><span class="pre">y.base()</span></tt>.</td>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">indirect_iterator</span></tt> whose
|
||||
<tt class="docutils literal"><span class="pre">m_iterator</span></tt> subobject is constructed from <tt class="docutils literal"><span class="pre">y.base()</span></tt>.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">Iterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">Iterator</span> <span class="pre">const&</span> <span class="pre">base()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">m_iterator</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">m_iterator</span></tt></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">reference</span> <span class="pre">operator*()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">**m_iterator</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">**m_iterator</span></tt></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">indirect_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">indirect_iterator&</span> <span class="pre">operator++();</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">++m_iterator</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="docutils literal"><span class="pre">++m_iterator</span></tt></td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p><tt class="literal"><span class="pre">indirect_iterator&</span> <span class="pre">operator--();</span></tt></p>
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<p><tt class="docutils literal"><span class="pre">indirect_iterator&</span> <span class="pre">operator--();</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="literal"><span class="pre">--m_iterator</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body"><tt class="docutils literal"><span class="pre">--m_iterator</span></tt></td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="literal"><span class="pre">*this</span></tt></td>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><tt class="docutils literal"><span class="pre">*this</span></tt></td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="indirect_iterator_ref.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
::
|
||||
|
||||
template <
|
||||
|
||||
415
doc/issues.html
415
doc/issues.html
@ -3,68 +3,354 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||
<meta name="generator" content="Docutils 0.3.6: http://docutils.sourceforge.net/" />
|
||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
||||
<title>Problem with is_writable and is_swappable in N1550</title>
|
||||
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||
<meta name="author" content="David Abrahams and Jeremy Siek" />
|
||||
<meta name="organization" content="Boost Consulting, Indiana University Bloomington" />
|
||||
<meta name="date" content="2003-11-19" />
|
||||
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek 2003. Use, modification and distribution is subject to the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)" />
|
||||
<style type="text/css">
|
||||
|
||||
/*
|
||||
:Author: David Goodger
|
||||
:Contact: goodger@users.sourceforge.net
|
||||
:Date: $Date$
|
||||
:Revision: $Revision$
|
||||
:Copyright: This stylesheet has been placed in the public domain.
|
||||
|
||||
Default cascading style sheet for the HTML output of Docutils.
|
||||
|
||||
See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
|
||||
customize this style sheet.
|
||||
*/
|
||||
|
||||
/* used to remove borders from tables and images */
|
||||
.borderless, table.borderless td, table.borderless th {
|
||||
border: 0 }
|
||||
|
||||
table.borderless td, table.borderless th {
|
||||
/* Override padding for "table.docutils td" with "! important".
|
||||
The right padding separates the table cells. */
|
||||
padding: 0 0.5em 0 0 ! important }
|
||||
|
||||
.first {
|
||||
/* Override more specific margin styles with "! important". */
|
||||
margin-top: 0 ! important }
|
||||
|
||||
.last, .with-subtitle {
|
||||
margin-bottom: 0 ! important }
|
||||
|
||||
.hidden {
|
||||
display: none }
|
||||
|
||||
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|
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|
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|
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|
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|
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|
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|
||||
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|
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|
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|
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|
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|
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|
||||
*/
|
||||
|
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|
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|
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|
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|
||||
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|
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|
||||
|
||||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
compound paragraphs.
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||||
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|
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
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|
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
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|
||||
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|
||||
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|
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|
||||
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|
||||
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|
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
/* font-size relative to parent (h1..h6 element) */
|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
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|
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|
||||
|
||||
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|
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|
||||
|
||||
ul.auto-toc {
|
||||
list-style-type: none }
|
||||
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<h1 class="title">Problem with <tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt> in <a class="reference" href="http://www.boost-consulting.com/writing/n1550.html">N1550</a></h1>
|
||||
<div class="document" id="problem-with-is-writable-and-is-swappable-in-n1550">
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<h1 class="title">Problem with <tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt> in <a class="reference" href="http://www.boost-consulting.com/writing/n1550.html">N1550</a></h1>
|
||||
<table class="docinfo" frame="void" rules="none">
|
||||
<col class="docinfo-name" />
|
||||
<col class="docinfo-content" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Author:</th><td class="field-body">David Abrahams and Jeremy Siek</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Contact:</th><td class="field-body"><a class="reference" href="mailto:dave@boost-consulting.com">dave@boost-consulting.com</a>, <a class="reference" href="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</a></td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Organization:</th><td class="field-body"><a class="reference" href="http://www.boost-consulting.com">Boost Consulting</a>, Indiana University Bloomington</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">date:</th><td class="field-body">$Date$</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Copyright:</th><td class="field-body">Copyright David Abrahams, Jeremy Siek 2003. Use, modification and
|
||||
<tr><th class="docinfo-name">Author:</th>
|
||||
<td>David Abrahams and Jeremy Siek</td></tr>
|
||||
<tr><th class="docinfo-name">Contact:</th>
|
||||
<td><a class="first reference" href="mailto:dave@boost-consulting.com">dave@boost-consulting.com</a>, <a class="last reference" href="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</a></td></tr>
|
||||
<tr><th class="docinfo-name">Organization:</th>
|
||||
<td><a class="first reference" href="http://www.boost-consulting.com">Boost Consulting</a>, Indiana University Bloomington</td></tr>
|
||||
<tr><th class="docinfo-name">Date:</th>
|
||||
<td>2003-11-19</td></tr>
|
||||
<tr><th class="docinfo-name">Copyright:</th>
|
||||
<td>Copyright David Abrahams, Jeremy Siek 2003. Use, modification and
|
||||
distribution is subject to the Boost Software License,
|
||||
Version 1.0. (See accompanying file LICENSE_1_0.txt or copy
|
||||
at <a class="reference" href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</td>
|
||||
</tr>
|
||||
at <a class="reference" href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#introduction" id="id1" name="id1">Introduction</a></li>
|
||||
<li><a class="reference" href="#proposed-resolution" id="id2" name="id2">Proposed Resolution</a></li>
|
||||
<li><a class="reference" href="#rationale" id="id3" name="id3">Rationale</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="introduction">
|
||||
<h1><a class="toc-backref" href="#id1" name="introduction">Introduction</a></h1>
|
||||
<p>The <tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt> traits classes in <a class="reference" href="http://www.boost-consulting.com/writing/n1550.html">N1550</a>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id1" id="introduction" name="introduction">Introduction</a></h1>
|
||||
<p>The <tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt> traits classes in <a class="reference" href="http://www.boost-consulting.com/writing/n1550.html">N1550</a>
|
||||
provide a mechanism for determining at compile time if an iterator
|
||||
type is a model of the new Writable Iterator and Swappable Iterator
|
||||
concepts, analogous to <tt class="literal"><span class="pre">iterator_traits<X>::iterator_category</span></tt>
|
||||
concepts, analogous to <tt class="docutils literal"><span class="pre">iterator_traits<X>::iterator_category</span></tt>
|
||||
for the old iterator concepts. For backward compatibility,
|
||||
<tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt> not only work with new
|
||||
<tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt> not only work with new
|
||||
iterators, but they also are intended to work for old
|
||||
iterators (iterators that meet the requirements for one of the
|
||||
iterator concepts in the current standard). In the case of old
|
||||
iterators, the writability and swapability is deduced based on the
|
||||
<tt class="literal"><span class="pre">iterator_category</span></tt> and also the <tt class="literal"><span class="pre">reference</span></tt> type. The
|
||||
<tt class="docutils literal"><span class="pre">iterator_category</span></tt> and also the <tt class="docutils literal"><span class="pre">reference</span></tt> type. The
|
||||
specification for this deduction gives false positives for forward
|
||||
iterators that have non-assignable value types.</p>
|
||||
<p>To review, the part of the <tt class="literal"><span class="pre">is_writable</span></tt> trait definition which
|
||||
<p>To review, the part of the <tt class="docutils literal"><span class="pre">is_writable</span></tt> trait definition which
|
||||
applies to old iterators is:</p>
|
||||
<pre class="literal-block">
|
||||
if (cat is convertible to output_iterator_tag)
|
||||
return true;
|
||||
else if (cat is convertible to forward_iterator_tag
|
||||
and iterator_traits<Iterator>::reference is a
|
||||
and iterator_traits<Iterator>::reference is a
|
||||
mutable reference)
|
||||
return true;
|
||||
else
|
||||
return false;
|
||||
</pre>
|
||||
<p>Suppose the <tt class="literal"><span class="pre">value_type</span></tt> of the iterator <tt class="literal"><span class="pre">It</span></tt> has a private
|
||||
<p>Suppose the <tt class="docutils literal"><span class="pre">value_type</span></tt> of the iterator <tt class="docutils literal"><span class="pre">It</span></tt> has a private
|
||||
assignment operator:</p>
|
||||
<pre class="literal-block">
|
||||
class B {
|
||||
@ -74,31 +360,31 @@ private:
|
||||
B& operator=(const B&);
|
||||
};
|
||||
</pre>
|
||||
<p>and suppose the <tt class="literal"><span class="pre">reference</span></tt> type of the iterator is <tt class="literal"><span class="pre">B&</span></tt>. In
|
||||
that case, <tt class="literal"><span class="pre">is_writable<It>::value</span></tt> will be true when in fact
|
||||
attempting to write into <tt class="literal"><span class="pre">B</span></tt> will cause an error.</p>
|
||||
<p>The same problem applies to <tt class="literal"><span class="pre">is_swappable</span></tt>.</p>
|
||||
<p>and suppose the <tt class="docutils literal"><span class="pre">reference</span></tt> type of the iterator is <tt class="docutils literal"><span class="pre">B&</span></tt>. In
|
||||
that case, <tt class="docutils literal"><span class="pre">is_writable<It>::value</span></tt> will be true when in fact
|
||||
attempting to write into <tt class="docutils literal"><span class="pre">B</span></tt> will cause an error.</p>
|
||||
<p>The same problem applies to <tt class="docutils literal"><span class="pre">is_swappable</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="proposed-resolution">
|
||||
<h1><a class="toc-backref" href="#id2" name="proposed-resolution">Proposed Resolution</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id2" id="proposed-resolution" name="proposed-resolution">Proposed Resolution</a></h1>
|
||||
<ol class="arabic">
|
||||
<li><p class="first">Remove the <tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt> traits, and remove the
|
||||
<li><p class="first">Remove the <tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt> traits, and remove the
|
||||
requirements in the Writable Iterator and Swappable Iterator concepts
|
||||
that require their models to support these traits.</p>
|
||||
</li>
|
||||
<li><p class="first">Change the <tt class="literal"><span class="pre">is_readable</span></tt> specification to be:
|
||||
<tt class="literal"><span class="pre">is_readable<X>::type</span></tt> is <tt class="literal"><span class="pre">true_type</span></tt> if the
|
||||
result type of <tt class="literal"><span class="pre">X::operator*</span></tt> is convertible to
|
||||
<tt class="literal"><span class="pre">iterator_traits<X>::value_type</span></tt> and is <tt class="literal"><span class="pre">false_type</span></tt>
|
||||
otherwise. Also, <tt class="literal"><span class="pre">is_readable</span></tt> is required to satisfy
|
||||
<li><p class="first">Change the <tt class="docutils literal"><span class="pre">is_readable</span></tt> specification to be:
|
||||
<tt class="docutils literal"><span class="pre">is_readable<X>::type</span></tt> is <tt class="docutils literal"><span class="pre">true_type</span></tt> if the
|
||||
result type of <tt class="docutils literal"><span class="pre">X::operator*</span></tt> is convertible to
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<X>::value_type</span></tt> and is <tt class="docutils literal"><span class="pre">false_type</span></tt>
|
||||
otherwise. Also, <tt class="docutils literal"><span class="pre">is_readable</span></tt> is required to satisfy
|
||||
the requirements for the UnaryTypeTrait concept
|
||||
(defined in the type traits proposal).</p>
|
||||
<p>Remove the requirement for support of the <tt class="literal"><span class="pre">is_readable</span></tt> trait from
|
||||
<p>Remove the requirement for support of the <tt class="docutils literal"><span class="pre">is_readable</span></tt> trait from
|
||||
the Readable Iterator concept.</p>
|
||||
</li>
|
||||
<li><p class="first">Remove the <tt class="literal"><span class="pre">iterator_tag</span></tt> class.</p>
|
||||
<li><p class="first">Remove the <tt class="docutils literal"><span class="pre">iterator_tag</span></tt> class.</p>
|
||||
</li>
|
||||
<li><p class="first">Change the specification of <tt class="literal"><span class="pre">traversal_category</span></tt> to:</p>
|
||||
<li><p class="first">Change the specification of <tt class="docutils literal"><span class="pre">traversal_category</span></tt> to:</p>
|
||||
<pre class="literal-block">
|
||||
traversal-category(Iterator) =
|
||||
let cat = iterator_traits<Iterator>::iterator_category
|
||||
@ -120,14 +406,14 @@ traversal-category(Iterator) =
|
||||
</li>
|
||||
</ol>
|
||||
</div>
|
||||
<div class="section" id="rationale">
|
||||
<h1><a class="toc-backref" href="#id3" name="rationale">Rationale</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id3" id="rationale" name="rationale">Rationale</a></h1>
|
||||
<ol class="arabic simple">
|
||||
<li>There are two reasons for removing <tt class="literal"><span class="pre">is_writable</span></tt>
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
motivation for having <tt class="literal"><span class="pre">is_writable</span></tt> and <tt class="literal"><span class="pre">is_swappable</span></tt>
|
||||
motivation for having <tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt>
|
||||
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|
||||
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|
||||
so we should have tags for the new iterator categories.
|
||||
@ -137,34 +423,29 @@ less of a need for dispatching based on writability
|
||||
and swappability, since typically algorithms
|
||||
that need these capabilities have no alternative if
|
||||
they are not provided.</li>
|
||||
<li>We discovered that the <tt class="literal"><span class="pre">is_readable</span></tt> trait can be implemented
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
Readable Iterator concept, and change the definition of
|
||||
<tt class="literal"><span class="pre">is_readable</span></tt> so that it works for any iterator type.</li>
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
With <tt class="docutils literal"><span class="pre">is_writable</span></tt> and <tt class="docutils literal"><span class="pre">is_swappable</span></tt> gone, and
|
||||
<tt class="docutils literal"><span class="pre">is_readable</span></tt> no longer in need of special hints,
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
</ol>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="issues.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
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|
||||
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|
||||
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||||
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||||
@ -3,13 +3,295 @@
|
||||
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|
||||
<title>Iterator Adaptor</title>
|
||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, University of Hanover Institute for Transport Railway Operation and Construction" />
|
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<meta name="date" content="2004-11-01" />
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</head>
|
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<body>
|
||||
<div class="document" id="iterator-adaptor">
|
||||
@ -32,6 +314,9 @@ Railway Operation and Construction</a></td></tr>
|
||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
@ -40,9 +325,12 @@ Railway Operation and Construction</a></td></tr>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<!-- Version 1.1 of this ReStructuredText document corresponds to
|
||||
n1530_, the paper accepted by the LWG. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<p>Each specialization of the <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> class template is derived from
|
||||
a specialization of <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>. The core interface functions
|
||||
expected by <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> are implemented in terms of the
|
||||
@ -53,8 +341,8 @@ Whether the derived class models any of the standard iterator concepts
|
||||
depends on the operations supported by the <tt class="docutils literal"><span class="pre">Base</span></tt> type and which
|
||||
core interface functions of <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> are redefined in the
|
||||
<tt class="docutils literal"><span class="pre">Derived</span></tt> class.</p>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#overview" id="id6" name="id6">Overview</a></li>
|
||||
<li><a class="reference" href="#reference" id="id7" name="id7">Reference</a><ul>
|
||||
@ -68,11 +356,14 @@ core interface functions of <tt class="docutils literal"><span class="pre">itera
|
||||
<li><a class="reference" href="#tutorial-example" id="id13" name="id13">Tutorial Example</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="overview">
|
||||
<h1><a class="toc-backref" href="#id6" name="overview">Overview</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id6" id="overview" name="overview">Overview</a></h1>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<!-- Version 1.2 of this ReStructuredText document corresponds to
|
||||
n1530_, the paper accepted by the LWG for TR1. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<p>The <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> class template adapts some <tt class="docutils literal"><span class="pre">Base</span></tt> <a class="footnote-reference" href="#base" id="id1" name="id1">[1]</a>
|
||||
type to create a new iterator. Instantiations of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>
|
||||
are derived from a corresponding instantiation of <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>
|
||||
@ -109,11 +400,14 @@ template parameter may not always be identical to the iterator's
|
||||
<tt class="docutils literal"><span class="pre">reference</span></tt> type, and will keep users from making mistakes based on
|
||||
that assumption.</p>
|
||||
</div>
|
||||
<div class="section" id="reference">
|
||||
<h1><a class="toc-backref" href="#id7" name="reference">Reference</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id7" id="reference" name="reference">Reference</a></h1>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<!-- Version 1.4 of this ReStructuredText document corresponds to
|
||||
n1530_, the paper accepted by the LWG for TR1. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<pre class="literal-block">
|
||||
template <
|
||||
class Derived
|
||||
@ -123,7 +417,7 @@ template <
|
||||
, class Reference = use_default
|
||||
, class Difference = use_default
|
||||
>
|
||||
class iterator_adaptor
|
||||
class iterator_adaptor
|
||||
: public iterator_facade<Derived, <em>V'</em>, <em>C'</em>, <em>R'</em>, <em>D'</em>> // see <a class="reference" href="#base-parameters">details</a>
|
||||
{
|
||||
friend class iterator_core_access;
|
||||
@ -136,12 +430,12 @@ class iterator_adaptor
|
||||
typedef iterator_adaptor iterator_adaptor_;
|
||||
Base const& base_reference() const;
|
||||
Base& base_reference();
|
||||
private: // Core iterator interface for iterator_facade.
|
||||
private: // Core iterator interface for iterator_facade.
|
||||
typename iterator_adaptor::reference dereference() const;
|
||||
|
||||
template <
|
||||
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||
>
|
||||
>
|
||||
bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& x) const;
|
||||
|
||||
void advance(typename iterator_adaptor::difference_type n);
|
||||
@ -150,7 +444,7 @@ class iterator_adaptor
|
||||
|
||||
template <
|
||||
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||
>
|
||||
>
|
||||
typename iterator_adaptor::difference_type distance_to(
|
||||
iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& y) const;
|
||||
|
||||
@ -158,13 +452,13 @@ class iterator_adaptor
|
||||
Base m_iterator; // exposition only
|
||||
};
|
||||
</pre>
|
||||
<a class="target" id="requirements" name="requirements"></a><div class="section" id="iterator-adaptor-requirements">
|
||||
<h2><a class="toc-backref" href="#id8" name="iterator-adaptor-requirements"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> requirements</a></h2>
|
||||
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|
||||
<h2><a class="toc-backref" href="#id8" id="iterator-adaptor-requirements" name="iterator-adaptor-requirements"><span id="requirements"></span><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> requirements</a></h2>
|
||||
<p><tt class="docutils literal"><span class="pre">static_cast<Derived*>(iterator_adaptor*)</span></tt> shall be well-formed.
|
||||
The <tt class="docutils literal"><span class="pre">Base</span></tt> argument shall be Assignable and Copy Constructible.</p>
|
||||
<a class="target" id="base-parameters" name="base-parameters"></a></div>
|
||||
<div class="section" id="iterator-adaptor-base-class-parameters">
|
||||
<h2><a class="toc-backref" href="#id9" name="iterator-adaptor-base-class-parameters"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></h2>
|
||||
</div>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id9" id="iterator-adaptor-base-class-parameters" name="iterator-adaptor-base-class-parameters"><span id="base-parameters"></span><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></h2>
|
||||
<p>The <em>V'</em>, <em>C'</em>, <em>R'</em>, and <em>D'</em> parameters of the <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>
|
||||
used as a base class in the summary of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>
|
||||
above are defined as follows:</p>
|
||||
@ -204,8 +498,8 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
||||
<!-- The above is confusing and needs a rewrite. -JGS -->
|
||||
<!-- That's why it's removed. We're embracing inheritance, remember? -->
|
||||
</div>
|
||||
<div class="section" id="iterator-adaptor-public-operations">
|
||||
<h2><a class="toc-backref" href="#id10" name="iterator-adaptor-public-operations"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id10" id="iterator-adaptor-public-operations" name="iterator-adaptor-public-operations"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></h2>
|
||||
<p><tt class="docutils literal"><span class="pre">iterator_adaptor();</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
@ -213,7 +507,7 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body">The <tt class="docutils literal"><span class="pre">Base</span></tt> type must be Default Constructible.</td>
|
||||
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|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> with
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> with
|
||||
<tt class="docutils literal"><span class="pre">m_iterator</span></tt> default constructed.</td>
|
||||
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|
||||
</tbody>
|
||||
@ -238,8 +532,8 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<div class="section" id="iterator-adaptor-protected-member-functions">
|
||||
<h2><a class="toc-backref" href="#id11" name="iterator-adaptor-protected-member-functions"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id11" id="iterator-adaptor-protected-member-functions" name="iterator-adaptor-protected-member-functions"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></h2>
|
||||
<p><tt class="docutils literal"><span class="pre">Base</span> <span class="pre">const&</span> <span class="pre">base_reference()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
@ -259,8 +553,8 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<div class="section" id="iterator-adaptor-private-member-functions">
|
||||
<h2><a class="toc-backref" href="#id12" name="iterator-adaptor-private-member-functions"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id12" id="iterator-adaptor-private-member-functions" name="iterator-adaptor-private-member-functions"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></h2>
|
||||
<p><tt class="docutils literal"><span class="pre">typename</span> <span class="pre">iterator_adaptor::reference</span> <span class="pre">dereference()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
@ -273,7 +567,7 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
||||
<pre class="literal-block">
|
||||
template <
|
||||
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||
>
|
||||
>
|
||||
bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& x) const;
|
||||
</pre>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
@ -314,7 +608,7 @@ bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const
|
||||
<pre class="literal-block">
|
||||
template <
|
||||
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||
>
|
||||
>
|
||||
typename iterator_adaptor::difference_type distance_to(
|
||||
iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& y) const;
|
||||
</pre>
|
||||
@ -328,8 +622,8 @@ typename iterator_adaptor::difference_type distance_to(
|
||||
</table>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="tutorial-example">
|
||||
<h1><a class="toc-backref" href="#id13" name="tutorial-example">Tutorial Example</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id13" id="tutorial-example" name="tutorial-example">Tutorial Example</a></h1>
|
||||
<!-- Copyright David Abrahams 2004. Use, modification and distribution is -->
|
||||
<!-- subject to the Boost Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
@ -439,10 +733,5 @@ adaptor, and also <a class="reference" href="counting_iterator.html"><tt class="
|
||||
<tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>'s <tt class="docutils literal"><span class="pre">Base</span></tt> type needn't be an iterator.</p>
|
||||
</div>
|
||||
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|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="iterator_adaptor.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
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|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
+++++++++++++++++
|
||||
Iterator Adaptor
|
||||
+++++++++++++++++
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
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|
||||
n1530_, the paper accepted by the LWG.
|
||||
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
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|
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|
||||
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|
||||
<div class="document">
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<!-- Version 1.4 of this ReStructuredText document corresponds to
|
||||
n1530_, the paper accepted by the LWG for TR1. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<pre class="literal-block">
|
||||
template <
|
||||
class Derived
|
||||
@ -21,7 +306,7 @@ template <
|
||||
, class Reference = use_default
|
||||
, class Difference = use_default
|
||||
>
|
||||
class iterator_adaptor
|
||||
class iterator_adaptor
|
||||
: public iterator_facade<Derived, <em>V'</em>, <em>C'</em>, <em>R'</em>, <em>D'</em>> // see <a class="reference" href="#base-parameters">details</a>
|
||||
{
|
||||
friend class iterator_core_access;
|
||||
@ -34,12 +319,12 @@ class iterator_adaptor
|
||||
typedef iterator_adaptor iterator_adaptor_;
|
||||
Base const& base_reference() const;
|
||||
Base& base_reference();
|
||||
private: // Core iterator interface for iterator_facade.
|
||||
private: // Core iterator interface for iterator_facade.
|
||||
typename iterator_adaptor::reference dereference() const;
|
||||
|
||||
template <
|
||||
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||
>
|
||||
>
|
||||
bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& x) const;
|
||||
|
||||
void advance(typename iterator_adaptor::difference_type n);
|
||||
@ -48,7 +333,7 @@ class iterator_adaptor
|
||||
|
||||
template <
|
||||
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||
>
|
||||
>
|
||||
typename iterator_adaptor::difference_type distance_to(
|
||||
iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& y) const;
|
||||
|
||||
@ -56,13 +341,13 @@ class iterator_adaptor
|
||||
Base m_iterator; // exposition only
|
||||
};
|
||||
</pre>
|
||||
<div class="section" id="iterator-adaptor-requirements">
|
||||
<h1><a name="iterator-adaptor-requirements"><span class="target" id="requirements"></span><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> requirements</a></h1>
|
||||
<div class="section">
|
||||
<h1><a id="iterator-adaptor-requirements" name="iterator-adaptor-requirements"><span id="requirements"></span><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> requirements</a></h1>
|
||||
<p><tt class="docutils literal"><span class="pre">static_cast<Derived*>(iterator_adaptor*)</span></tt> shall be well-formed.
|
||||
The <tt class="docutils literal"><span class="pre">Base</span></tt> argument shall be Assignable and Copy Constructible.</p>
|
||||
</div>
|
||||
<div class="section" id="iterator-adaptor-base-class-parameters">
|
||||
<h1><a name="iterator-adaptor-base-class-parameters"><span class="target" id="base-parameters"></span><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></h1>
|
||||
<div class="section">
|
||||
<h1><a id="iterator-adaptor-base-class-parameters" name="iterator-adaptor-base-class-parameters"><span id="base-parameters"></span><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> base class parameters</a></h1>
|
||||
<p>The <em>V'</em>, <em>C'</em>, <em>R'</em>, and <em>D'</em> parameters of the <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>
|
||||
used as a base class in the summary of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt>
|
||||
above are defined as follows:</p>
|
||||
@ -102,8 +387,8 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
||||
<!-- The above is confusing and needs a rewrite. -JGS -->
|
||||
<!-- That's why it's removed. We're embracing inheritance, remember? -->
|
||||
</div>
|
||||
<div class="section" id="iterator-adaptor-public-operations">
|
||||
<h1><a name="iterator-adaptor-public-operations"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></h1>
|
||||
<div class="section">
|
||||
<h1><a id="iterator-adaptor-public-operations" name="iterator-adaptor-public-operations"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> public operations</a></h1>
|
||||
<p><tt class="docutils literal"><span class="pre">iterator_adaptor();</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
@ -111,7 +396,7 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body">The <tt class="docutils literal"><span class="pre">Base</span></tt> type must be Default Constructible.</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> with
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body">An instance of <tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> with
|
||||
<tt class="docutils literal"><span class="pre">m_iterator</span></tt> default constructed.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
@ -136,8 +421,8 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<div class="section" id="iterator-adaptor-protected-member-functions">
|
||||
<h1><a name="iterator-adaptor-protected-member-functions"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></h1>
|
||||
<div class="section">
|
||||
<h1><a id="iterator-adaptor-protected-member-functions" name="iterator-adaptor-protected-member-functions"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> protected member functions</a></h1>
|
||||
<p><tt class="docutils literal"><span class="pre">Base</span> <span class="pre">const&</span> <span class="pre">base_reference()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
@ -157,8 +442,8 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<div class="section" id="iterator-adaptor-private-member-functions">
|
||||
<h1><a name="iterator-adaptor-private-member-functions"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></h1>
|
||||
<div class="section">
|
||||
<h1><a id="iterator-adaptor-private-member-functions" name="iterator-adaptor-private-member-functions"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt> private member functions</a></h1>
|
||||
<p><tt class="docutils literal"><span class="pre">typename</span> <span class="pre">iterator_adaptor::reference</span> <span class="pre">dereference()</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
@ -171,7 +456,7 @@ expression involving ``Derived`` in those concepts' requirements. -->
|
||||
<pre class="literal-block">
|
||||
template <
|
||||
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||
>
|
||||
>
|
||||
bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& x) const;
|
||||
</pre>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
@ -212,7 +497,7 @@ bool equal(iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const
|
||||
<pre class="literal-block">
|
||||
template <
|
||||
class OtherDerived, class OtherIterator, class V, class C, class R, class D
|
||||
>
|
||||
>
|
||||
typename iterator_adaptor::difference_type distance_to(
|
||||
iterator_adaptor<OtherDerived, OtherIterator, V, C, R, D> const& y) const;
|
||||
</pre>
|
||||
@ -226,10 +511,5 @@ typename iterator_adaptor::difference_type distance_to(
|
||||
</table>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="iterator_adaptor_ref.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
.. Version 1.4 of this ReStructuredText document corresponds to
|
||||
n1530_, the paper accepted by the LWG for TR1.
|
||||
|
||||
|
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@ -3,13 +3,295 @@
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<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
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<title>Iterator Archetype</title>
|
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<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
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|
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|
||||
|
||||
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|
||||
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|
||||
<body>
|
||||
<div class="document" id="iterator-archetype">
|
||||
@ -31,6 +313,9 @@ Lab</a>, <a class="last reference" href="http://www.styleadvisor.com">Zephyr Ass
|
||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2004.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
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|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
@ -43,8 +328,8 @@ For further information see the documentation for the <a class="reference" href=
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#reference" id="id1" name="id1">Reference</a><ul>
|
||||
<li><a class="reference" href="#iterator-archetype-synopsis" id="id2" name="id2"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Synopsis</a></li>
|
||||
@ -56,10 +341,10 @@ For further information see the documentation for the <a class="reference" href=
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="reference">
|
||||
<h1><a class="toc-backref" href="#id1" name="reference">Reference</a></h1>
|
||||
<div class="section" id="iterator-archetype-synopsis">
|
||||
<h2><a class="toc-backref" href="#id2" name="iterator-archetype-synopsis"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Synopsis</a></h2>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id1" id="reference" name="reference">Reference</a></h1>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id2" id="iterator-archetype-synopsis" name="iterator-archetype-synopsis"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Synopsis</a></h2>
|
||||
<pre class="literal-block">
|
||||
namespace iterator_archetypes
|
||||
{
|
||||
@ -88,8 +373,8 @@ class iterator_archetype
|
||||
};
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section" id="access-category-tags">
|
||||
<h2><a class="toc-backref" href="#id3" name="access-category-tags"><tt class="docutils literal"><span class="pre">Access</span> <span class="pre">Category</span> <span class="pre">Tags</span></tt></a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id3" id="access-category-tags" name="access-category-tags"><tt class="docutils literal"><span class="pre">Access</span> <span class="pre">Category</span> <span class="pre">Tags</span></tt></a></h2>
|
||||
<p>The access category types provided correspond to the following
|
||||
standard iterator access concept combinations:</p>
|
||||
<pre class="literal-block">
|
||||
@ -114,27 +399,27 @@ writeable_lvalue_iterator_t :=
|
||||
Readable Iterator & Writeable Iterator & Swappable Iterator & Lvalue Iterator
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section" id="iterator-archetype-requirements">
|
||||
<h2><a class="toc-backref" href="#id4" name="iterator-archetype-requirements"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Requirements</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id4" id="iterator-archetype-requirements" name="iterator-archetype-requirements"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Requirements</a></h2>
|
||||
<p>The <tt class="docutils literal"><span class="pre">AccessCategory</span></tt> argument must be one of the predefined access
|
||||
category tags. The <tt class="docutils literal"><span class="pre">TraversalCategory</span></tt> must be one of the standard
|
||||
traversal tags. The <tt class="docutils literal"><span class="pre">Value</span></tt> type must satisfy the requirements of
|
||||
the iterator concept specified by <tt class="docutils literal"><span class="pre">AccessCategory</span></tt> and
|
||||
<tt class="docutils literal"><span class="pre">TraversalCategory</span></tt> as implied by the nested traits types.</p>
|
||||
</div>
|
||||
<div class="section" id="iterator-archetype-models">
|
||||
<h2><a class="toc-backref" href="#id5" name="iterator-archetype-models"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Models</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id5" id="iterator-archetype-models" name="iterator-archetype-models"><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> Models</a></h2>
|
||||
<p><tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> models the iterator concepts specified by the
|
||||
<tt class="docutils literal"><span class="pre">AccessCategory</span></tt> and <tt class="docutils literal"><span class="pre">TraversalCategory</span></tt>
|
||||
arguments. <tt class="docutils literal"><span class="pre">iterator_archetype</span></tt> does not model any other access
|
||||
concepts or any more derived traversal concepts.</p>
|
||||
</div>
|
||||
<div class="section" id="traits">
|
||||
<h2><a class="toc-backref" href="#id6" name="traits"><tt class="docutils literal"><span class="pre">Traits</span></tt></a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id6" id="traits" name="traits"><tt class="docutils literal"><span class="pre">Traits</span></tt></a></h2>
|
||||
<p>The nested trait types are defined as follows:</p>
|
||||
<pre class="literal-block">
|
||||
if (AccessCategory == readable_iterator_t)
|
||||
|
||||
|
||||
value_type = Value
|
||||
reference = Value
|
||||
pointer = Value*
|
||||
@ -152,7 +437,7 @@ else if (AccessCategory == readable_writable_iterator_t)
|
||||
reference :=
|
||||
|
||||
A type X that is convertible to Value for which the following
|
||||
expression is valid. Given an object x of type X and v of type
|
||||
expression is valid. Given an object x of type X and v of type
|
||||
Value.
|
||||
|
||||
x = v
|
||||
@ -160,13 +445,13 @@ else if (AccessCategory == readable_writable_iterator_t)
|
||||
pointer = Value*
|
||||
|
||||
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|
||||
|
||||
|
||||
value_type = Value
|
||||
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|
||||
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|
||||
|
||||
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|
||||
|
||||
|
||||
value_type = Value
|
||||
reference = Value&
|
||||
pointer = Value*
|
||||
@ -180,7 +465,7 @@ else
|
||||
difference_type := unspecified type
|
||||
|
||||
|
||||
iterator_category :=
|
||||
iterator_category :=
|
||||
|
||||
A type X satisfying the following two constraints:
|
||||
|
||||
@ -211,10 +496,5 @@ iterator_category :=
|
||||
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|
||||
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|
||||
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|
||||
<hr class="docutils footer" />
|
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|
||||
<a class="reference" href="iterator_archetypes.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
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|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
++++++++++++++++++++
|
||||
Iterator Archetype
|
||||
++++++++++++++++++++
|
||||
|
||||
@ -3,13 +3,295 @@
|
||||
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<title>Iterator Concepts</title>
|
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|
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<div class="document" id="iterator-concepts">
|
||||
@ -31,6 +313,9 @@ Lab</a>, <a class="last reference" href="http://www.styleadvisor.com">Zephyr Ass
|
||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2004.</td></tr>
|
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</table>
|
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<!-- Distributed under the Boost -->
|
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<!-- Software License, Version 1.0. (See accompanying -->
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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@ -44,10 +329,10 @@ the template.</td>
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</table>
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<p>For an introduction to using concept checking classes, see
|
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the documentation for the <a class="reference" href="../../concept_check/index.html"><tt class="docutils literal"><span class="pre">boost::concept_check</span></tt></a> library.</p>
|
||||
<div class="section" id="reference">
|
||||
<h1><a name="reference">Reference</a></h1>
|
||||
<div class="section" id="iterator-access-concepts">
|
||||
<h2><a name="iterator-access-concepts">Iterator Access Concepts</a></h2>
|
||||
<div class="section">
|
||||
<h1><a id="reference" name="reference">Reference</a></h1>
|
||||
<div class="section">
|
||||
<h2><a id="iterator-access-concepts" name="iterator-access-concepts">Iterator Access Concepts</a></h2>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="ReadableIterator.html"><em>Readable Iterator</em></a></li>
|
||||
<li><a class="reference" href="WritableIterator.html"><em>Writable Iterator</em></a></li>
|
||||
@ -55,8 +340,8 @@ the documentation for the <a class="reference" href="../../concept_check/index.h
|
||||
<li><a class="reference" href="LvalueIterator.html"><em>Lvalue Iterator</em></a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="iterator-traversal-concepts">
|
||||
<h2><a name="iterator-traversal-concepts">Iterator Traversal Concepts</a></h2>
|
||||
<div class="section">
|
||||
<h2><a id="iterator-traversal-concepts" name="iterator-traversal-concepts">Iterator Traversal Concepts</a></h2>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="IncrementableIterator.html"><em>Incrementable Iterator</em></a></li>
|
||||
<li><a class="reference" href="SinglePassIterator.html"><em>Single Pass Iterator</em></a></li>
|
||||
@ -65,8 +350,8 @@ the documentation for the <a class="reference" href="../../concept_check/index.h
|
||||
<li><a class="reference" href="RandomAccessTraversal.html"><em>Random Access Traversal</em></a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="iterator-concepts-hpp-synopsis">
|
||||
<h2><a name="iterator-concepts-hpp-synopsis"><tt class="docutils literal"><span class="pre">iterator_concepts.hpp</span></tt> Synopsis</a></h2>
|
||||
<div class="section">
|
||||
<h2><a id="iterator-concepts-hpp-synopsis" name="iterator-concepts-hpp-synopsis"><tt class="docutils literal"><span class="pre">iterator_concepts.hpp</span></tt> Synopsis</a></h2>
|
||||
<pre class="literal-block">
|
||||
namespace boost_concepts {
|
||||
|
||||
@ -114,10 +399,5 @@ namespace boost_concepts {
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
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|
||||
<a class="reference" href="iterator_concepts.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
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|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,4 +1,6 @@
|
||||
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
++++++++++++++++++
|
||||
Iterator Concepts
|
||||
|
||||
@ -3,13 +3,295 @@
|
||||
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<title>Iterator Facade</title>
|
||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||
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<meta name="date" content="2004-11-01" />
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||||
<div class="document" id="iterator-facade">
|
||||
@ -32,18 +314,24 @@ Railway Operation and Construction</a></td></tr>
|
||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><tt class="docutils literal"><span class="pre">iterator_facade</span></tt> is a base class template that implements the
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<tt class="docutils literal"><span class="pre">iterator_facade</span></tt> is a base class template that implements the
|
||||
interface of standard iterators in terms of a few core functions
|
||||
and associated types, to be supplied by a derived iterator class.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#overview" id="id23" name="id23">Overview</a><ul>
|
||||
<li><a class="reference" href="#usage" id="id24" name="id24">Usage</a></li>
|
||||
@ -80,11 +368,14 @@ and associated types, to be supplied by a derived iterator class.</td>
|
||||
</li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="overview">
|
||||
<h1><a class="toc-backref" href="#id23" name="overview">Overview</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id23" id="overview" name="overview">Overview</a></h1>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<!-- Version 1.1 of this ReStructuredText document corresponds to
|
||||
n1530_, the paper accepted by the LWG for TR1. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<p>While the iterator interface is rich, there is a core subset of the
|
||||
interface that is necessary for all the functionality. We have
|
||||
identified the following core behaviors for iterators:</p>
|
||||
@ -124,8 +415,8 @@ iterators, and a separate <tt class="docutils literal"><span class="pre">iterato
|
||||
impossible.</li>
|
||||
</ol>
|
||||
</blockquote>
|
||||
<div class="section" id="usage">
|
||||
<h2><a class="toc-backref" href="#id24" name="usage">Usage</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id24" id="usage" name="usage">Usage</a></h2>
|
||||
<p>The user of <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> derives his iterator class from a
|
||||
specialization of <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> and passes the derived
|
||||
iterator class as <tt class="docutils literal"><span class="pre">iterator_facade</span></tt>'s first template parameter.
|
||||
@ -148,8 +439,8 @@ requirements.</p>
|
||||
<col width="56%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr><th>Expression</th>
|
||||
<th>Effects</th>
|
||||
<tr><th class="head">Expression</th>
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<th class="head">Effects</th>
|
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</tr>
|
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</thead>
|
||||
<tbody valign="top">
|
||||
@ -188,8 +479,8 @@ constructor. Finally, if the iterator is to model Forward Traversal
|
||||
Iterator or a more-refined iterator concept, a default constructor is
|
||||
required.</p>
|
||||
</div>
|
||||
<div class="section" id="iterator-core-access">
|
||||
<h2><a class="toc-backref" href="#id25" name="iterator-core-access">Iterator Core Access</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id25" id="iterator-core-access" name="iterator-core-access">Iterator Core Access</a></h2>
|
||||
<p><tt class="docutils literal"><span class="pre">iterator_facade</span></tt> and the operator implementations need to be able
|
||||
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|
||||
core member functions public would expose an implementation detail to
|
||||
@ -212,7 +503,7 @@ provided, a class that acts as a gateway to the core member functions
|
||||
in the derived iterator class. The author of the derived class only
|
||||
needs to grant friendship to <tt class="docutils literal"><span class="pre">iterator_core_access</span></tt> to make his core
|
||||
member functions available to the library.</p>
|
||||
<!-- This is no long uptodate -thw -->
|
||||
<!-- This is no long uptodate -thw -->
|
||||
<!-- Yes it is; I made sure of it! -DWA -->
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||||
<p><tt class="docutils literal"><span class="pre">iterator_core_access</span></tt> will be typically implemented as an empty
|
||||
class containing only private static member functions which invoke the
|
||||
@ -222,8 +513,8 @@ standardize the gateway protocol. Note that even if
|
||||
open a safety loophole, as every core member function preserves the
|
||||
invariants of the iterator.</p>
|
||||
</div>
|
||||
<div class="section" id="operator">
|
||||
<h2><a class="toc-backref" href="#id26" name="operator"><tt class="docutils literal"><span class="pre">operator[]</span></tt></a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id26" id="operator" name="operator"><tt class="docutils literal"><span class="pre">operator[]</span></tt></a></h2>
|
||||
<p>The indexing operator for a generalized iterator presents special
|
||||
challenges. A random access iterator's <tt class="docutils literal"><span class="pre">operator[]</span></tt> is only
|
||||
required to return something convertible to its <tt class="docutils literal"><span class="pre">value_type</span></tt>.
|
||||
@ -245,8 +536,8 @@ the implementation of her iterator is free to implement an
|
||||
class; it will hide the one supplied by <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> from
|
||||
clients of her iterator.</p>
|
||||
</div>
|
||||
<div class="section" id="id2">
|
||||
<h2><a class="toc-backref" href="#id27" name="id2"><span class="target" id="operator-arrow"></span><tt class="docutils literal"><span class="pre">operator-></span></tt></a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id27" id="id2" name="id2"><span id="operator-arrow"></span><tt class="docutils literal"><span class="pre">operator-></span></tt></a></h2>
|
||||
<p>The <tt class="docutils literal"><span class="pre">reference</span></tt> type of a readable iterator (and today's input
|
||||
iterator) need not in fact be a reference, so long as it is
|
||||
convertible to the iterator's <tt class="docutils literal"><span class="pre">value_type</span></tt>. When the <tt class="docutils literal"><span class="pre">value_type</span></tt>
|
||||
@ -267,11 +558,14 @@ Patterns, C++ Report, February 1995, pp. 24-27.</td></tr>
|
||||
</table>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="reference">
|
||||
<h1><a class="toc-backref" href="#id28" name="reference">Reference</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id28" id="reference" name="reference">Reference</a></h1>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<!-- Version 1.3 of this ReStructuredText document corresponds to
|
||||
n1530_, the paper accepted by the LWG for TR1. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<!-- Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003. -->
|
||||
<pre class="literal-block">
|
||||
template <
|
||||
class Derived
|
||||
@ -355,12 +649,12 @@ template <class Dr, class V, class TC, class R, class D>
|
||||
Derived operator+ (typename Derived::difference_type n,
|
||||
iterator_facade<Dr,V,TC,R,D> const&);
|
||||
</pre>
|
||||
<span class="target" id="iterator-category"></span><p>The <tt class="docutils literal"><span class="pre">iterator_category</span></tt> member of <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> is</p>
|
||||
<p id="iterator-category">The <tt class="docutils literal"><span class="pre">iterator_category</span></tt> member of <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> is</p>
|
||||
<pre class="literal-block">
|
||||
<em>iterator-category</em>(CategoryOrTraversal, value_type, reference)
|
||||
</pre>
|
||||
<p>where <em>iterator-category</em> is defined as follows:</p>
|
||||
<span class="target" id="id7"></span><pre class="literal-block">
|
||||
<pre class="literal-block" id="id7">
|
||||
<em>iterator-category</em>(C,R,V) :=
|
||||
if (C is convertible to std::input_iterator_tag
|
||||
|| C is convertible to std::output_iterator_tag
|
||||
@ -407,10 +701,10 @@ traversal tags would add no information]</p>
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<p>The <tt class="docutils literal"><span class="pre">enable_if_interoperable</span></tt> template used above is for exposition
|
||||
purposes. The member operators should only be in an overload set
|
||||
provided the derived types <tt class="docutils literal"><span class="pre">Dr1</span></tt> and <tt class="docutils literal"><span class="pre">Dr2</span></tt> are interoperable,
|
||||
provided the derived types <tt class="docutils literal"><span class="pre">Dr1</span></tt> and <tt class="docutils literal"><span class="pre">Dr2</span></tt> are interoperable,
|
||||
meaning that at least one of the types is convertible to the other. The
|
||||
<tt class="docutils literal"><span class="pre">enable_if_interoperable</span></tt> approach uses SFINAE to take the operators
|
||||
out of the overload set when the types are not interoperable.
|
||||
out of the overload set when the types are not interoperable.
|
||||
The operators should behave <em>as-if</em> <tt class="docutils literal"><span class="pre">enable_if_interoperable</span></tt>
|
||||
were defined to be:</p>
|
||||
<pre class="literal-block">
|
||||
@ -428,8 +722,8 @@ struct enable_if_interoperable
|
||||
>
|
||||
{};
|
||||
</pre>
|
||||
<div class="section" id="iterator-facade-requirements">
|
||||
<h2><a class="toc-backref" href="#id29" name="iterator-facade-requirements"><tt class="docutils literal"><span class="pre">iterator_facade</span></tt> Requirements</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id29" id="iterator-facade-requirements" name="iterator-facade-requirements"><tt class="docutils literal"><span class="pre">iterator_facade</span></tt> Requirements</a></h2>
|
||||
<p>The following table describes the typical valid expressions on
|
||||
<tt class="docutils literal"><span class="pre">iterator_facade</span></tt>'s <tt class="docutils literal"><span class="pre">Derived</span></tt> parameter, depending on the
|
||||
iterator concept(s) it will model. The operations in the first
|
||||
@ -442,8 +736,8 @@ object of type <tt class="docutils literal"><span class="pre">X</span></tt>, <tt
|
||||
object of a single pass iterator type interoperable with <tt class="docutils literal"><span class="pre">X</span></tt>, and <tt class="docutils literal"><span class="pre">z</span></tt>
|
||||
is a constant object of a random access traversal iterator type
|
||||
interoperable with <tt class="docutils literal"><span class="pre">X</span></tt>.</p>
|
||||
<span class="target" id="core-operations"></span><div class="topic">
|
||||
<p class="topic-title first"><tt class="docutils literal"><span class="pre">iterator_facade</span></tt> Core Operations</p>
|
||||
<div class="topic">
|
||||
<p class="topic-title first"><a id="core-operations" name="core-operations"><tt class="docutils literal"><span class="pre">iterator_facade</span></tt> Core Operations</a></p>
|
||||
<table border="1" class="docutils">
|
||||
<colgroup>
|
||||
<col width="21%" />
|
||||
@ -452,10 +746,10 @@ interoperable with <tt class="docutils literal"><span class="pre">X</span></tt>.
|
||||
<col width="29%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr><th>Expression</th>
|
||||
<th>Return Type</th>
|
||||
<th>Assertion/Note</th>
|
||||
<th>Used to implement Iterator
|
||||
<tr><th class="head">Expression</th>
|
||||
<th class="head">Return Type</th>
|
||||
<th class="head">Assertion/Note</th>
|
||||
<th class="head">Used to implement Iterator
|
||||
Concept(s)</th>
|
||||
</tr>
|
||||
</thead>
|
||||
@ -502,8 +796,8 @@ Iterator</td>
|
||||
</table>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="iterator-facade-operations">
|
||||
<h2><a class="toc-backref" href="#id30" name="iterator-facade-operations"><tt class="docutils literal"><span class="pre">iterator_facade</span></tt> operations</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id30" id="iterator-facade-operations" name="iterator-facade-operations"><tt class="docutils literal"><span class="pre">iterator_facade</span></tt> operations</a></h2>
|
||||
<p>The operations in this section are described in terms of operations on
|
||||
the core interface of <tt class="docutils literal"><span class="pre">Derived</span></tt> which may be inaccessible
|
||||
(i.e. private). The implementation should access these operations
|
||||
@ -527,14 +821,14 @@ of type <tt class="docutils literal"><span class="pre">pointer</span></tt> equal
|
||||
<pre class="literal-block">
|
||||
&static_cast<Derived const*>(this)->dereference()
|
||||
</pre>
|
||||
<p class="last">Otherwise returns an object of unspecified type such that,
|
||||
<p class="last">Otherwise returns an object of unspecified type such that,
|
||||
<tt class="docutils literal"><span class="pre">(*static_cast<Derived</span> <span class="pre">const*>(this))->m</span></tt> is equivalent to <tt class="docutils literal"><span class="pre">(w</span> <span class="pre">=</span> <span class="pre">**static_cast<Derived</span> <span class="pre">const*>(this),</span>
|
||||
<span class="pre">w.m)</span></tt> for some temporary object <tt class="docutils literal"><span class="pre">w</span></tt> of type <tt class="docutils literal"><span class="pre">value_type</span></tt>.</p>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<span class="target" id="brackets"></span><p><em>unspecified</em> <tt class="docutils literal"><span class="pre">operator[](difference_type</span> <span class="pre">n)</span> <span class="pre">const;</span></tt></p>
|
||||
<p id="brackets"><em>unspecified</em> <tt class="docutils literal"><span class="pre">operator[](difference_type</span> <span class="pre">n)</span> <span class="pre">const;</span></tt></p>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
@ -675,10 +969,12 @@ operator ==(iterator_facade<Dr1,V1,TC1,R1,D1> const& lhs,
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">if <tt class="docutils literal"><span class="pre">is_convertible<Dr2,Dr1>::value</span></tt></p>
|
||||
<dl class="last docutils">
|
||||
<dt>then </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr1</span> <span class="pre">const&)lhs).equal((Dr2</span> <span class="pre">const&)rhs)</span></tt>.</dd>
|
||||
<dt>Otherwise, </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).equal((Dr1</span> <span class="pre">const&)lhs)</span></tt>.</dd>
|
||||
<dt>then</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr1</span> <span class="pre">const&)lhs).equal((Dr2</span> <span class="pre">const&)rhs)</span></tt>.</p>
|
||||
</dd>
|
||||
<dt>Otherwise,</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).equal((Dr1</span> <span class="pre">const&)lhs)</span></tt>.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</td>
|
||||
</tr>
|
||||
@ -697,10 +993,12 @@ operator !=(iterator_facade<Dr1,V1,TC1,R1,D1> const& lhs,
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">if <tt class="docutils literal"><span class="pre">is_convertible<Dr2,Dr1>::value</span></tt></p>
|
||||
<dl class="last docutils">
|
||||
<dt>then </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">!((Dr1</span> <span class="pre">const&)lhs).equal((Dr2</span> <span class="pre">const&)rhs)</span></tt>.</dd>
|
||||
<dt>Otherwise, </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">!((Dr2</span> <span class="pre">const&)rhs).equal((Dr1</span> <span class="pre">const&)lhs)</span></tt>.</dd>
|
||||
<dt>then</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">!((Dr1</span> <span class="pre">const&)lhs).equal((Dr2</span> <span class="pre">const&)rhs)</span></tt>.</p>
|
||||
</dd>
|
||||
<dt>Otherwise,</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">!((Dr2</span> <span class="pre">const&)rhs).equal((Dr1</span> <span class="pre">const&)lhs)</span></tt>.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</td>
|
||||
</tr>
|
||||
@ -719,10 +1017,12 @@ operator <(iterator_facade<Dr1,V1,TC1,R1,D1> const& lhs,
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">if <tt class="docutils literal"><span class="pre">is_convertible<Dr2,Dr1>::value</span></tt></p>
|
||||
<dl class="last docutils">
|
||||
<dt>then </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr1</span> <span class="pre">const&)lhs).distance_to((Dr2</span> <span class="pre">const&)rhs)</span> <span class="pre"><</span> <span class="pre">0</span></tt>.</dd>
|
||||
<dt>Otherwise, </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).distance_to((Dr1</span> <span class="pre">const&)lhs)</span> <span class="pre">></span> <span class="pre">0</span></tt>.</dd>
|
||||
<dt>then</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr1</span> <span class="pre">const&)lhs).distance_to((Dr2</span> <span class="pre">const&)rhs)</span> <span class="pre"><</span> <span class="pre">0</span></tt>.</p>
|
||||
</dd>
|
||||
<dt>Otherwise,</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).distance_to((Dr1</span> <span class="pre">const&)lhs)</span> <span class="pre">></span> <span class="pre">0</span></tt>.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</td>
|
||||
</tr>
|
||||
@ -741,10 +1041,12 @@ operator <=(iterator_facade<Dr1,V1,TC1,R1,D1> const& lhs,
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">if <tt class="docutils literal"><span class="pre">is_convertible<Dr2,Dr1>::value</span></tt></p>
|
||||
<dl class="last docutils">
|
||||
<dt>then </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr1</span> <span class="pre">const&)lhs).distance_to((Dr2</span> <span class="pre">const&)rhs)</span> <span class="pre"><=</span> <span class="pre">0</span></tt>.</dd>
|
||||
<dt>Otherwise, </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).distance_to((Dr1</span> <span class="pre">const&)lhs)</span> <span class="pre">>=</span> <span class="pre">0</span></tt>.</dd>
|
||||
<dt>then</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr1</span> <span class="pre">const&)lhs).distance_to((Dr2</span> <span class="pre">const&)rhs)</span> <span class="pre"><=</span> <span class="pre">0</span></tt>.</p>
|
||||
</dd>
|
||||
<dt>Otherwise,</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).distance_to((Dr1</span> <span class="pre">const&)lhs)</span> <span class="pre">>=</span> <span class="pre">0</span></tt>.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</td>
|
||||
</tr>
|
||||
@ -763,10 +1065,12 @@ operator >(iterator_facade<Dr1,V1,TC1,R1,D1> const& lhs,
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">if <tt class="docutils literal"><span class="pre">is_convertible<Dr2,Dr1>::value</span></tt></p>
|
||||
<dl class="last docutils">
|
||||
<dt>then </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr1</span> <span class="pre">const&)lhs).distance_to((Dr2</span> <span class="pre">const&)rhs)</span> <span class="pre">></span> <span class="pre">0</span></tt>.</dd>
|
||||
<dt>Otherwise, </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).distance_to((Dr1</span> <span class="pre">const&)lhs)</span> <span class="pre"><</span> <span class="pre">0</span></tt>.</dd>
|
||||
<dt>then</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr1</span> <span class="pre">const&)lhs).distance_to((Dr2</span> <span class="pre">const&)rhs)</span> <span class="pre">></span> <span class="pre">0</span></tt>.</p>
|
||||
</dd>
|
||||
<dt>Otherwise,</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).distance_to((Dr1</span> <span class="pre">const&)lhs)</span> <span class="pre"><</span> <span class="pre">0</span></tt>.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</td>
|
||||
</tr>
|
||||
@ -785,16 +1089,18 @@ operator >=(iterator_facade<Dr1,V1,TC1,R1,D1> const& lhs,
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">if <tt class="docutils literal"><span class="pre">is_convertible<Dr2,Dr1>::value</span></tt></p>
|
||||
<dl class="last docutils">
|
||||
<dt>then </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr1</span> <span class="pre">const&)lhs).distance_to((Dr2</span> <span class="pre">const&)rhs)</span> <span class="pre">>=</span> <span class="pre">0</span></tt>.</dd>
|
||||
<dt>Otherwise, </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).distance_to((Dr1</span> <span class="pre">const&)lhs)</span> <span class="pre"><=</span> <span class="pre">0</span></tt>.</dd>
|
||||
<dt>then</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr1</span> <span class="pre">const&)lhs).distance_to((Dr2</span> <span class="pre">const&)rhs)</span> <span class="pre">>=</span> <span class="pre">0</span></tt>.</p>
|
||||
</dd>
|
||||
<dt>Otherwise,</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).distance_to((Dr1</span> <span class="pre">const&)lhs)</span> <span class="pre"><=</span> <span class="pre">0</span></tt>.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<span class="target" id="minus"></span><pre class="literal-block">
|
||||
<pre class="literal-block" id="minus">
|
||||
template <class Dr1, class V1, class TC1, class R1, class D1,
|
||||
class Dr2, class V2, class TC2, class R2, class D2>
|
||||
typename enable_if_interoperable<Dr1,Dr2,difference>::type
|
||||
@ -806,23 +1112,27 @@ operator -(iterator_facade<Dr1,V1,TC1,R1,D1> const& lhs,
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Return Type:</th><td class="field-body"><p class="first">if <tt class="docutils literal"><span class="pre">is_convertible<Dr2,Dr1>::value</span></tt></p>
|
||||
<blockquote class="last">
|
||||
<blockquote>
|
||||
<dl class="docutils">
|
||||
<dt>then </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">difference</span></tt> shall be
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<Dr1>::difference_type</span></tt>.</dd>
|
||||
<dt>Otherwise </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">difference</span></tt> shall be <tt class="docutils literal"><span class="pre">iterator_traits<Dr2>::difference_type</span></tt></dd>
|
||||
<dt>then</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">difference</span></tt> shall be
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<Dr1>::difference_type</span></tt>.</p>
|
||||
</dd>
|
||||
<dt>Otherwise</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">difference</span></tt> shall be <tt class="docutils literal"><span class="pre">iterator_traits<Dr2>::difference_type</span></tt></p>
|
||||
</dd>
|
||||
</dl>
|
||||
</blockquote>
|
||||
</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Returns:</th><td class="field-body"><p class="first">if <tt class="docutils literal"><span class="pre">is_convertible<Dr2,Dr1>::value</span></tt></p>
|
||||
<dl class="last docutils">
|
||||
<dt>then </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">-((Dr1</span> <span class="pre">const&)lhs).distance_to((Dr2</span> <span class="pre">const&)rhs)</span></tt>.</dd>
|
||||
<dt>Otherwise, </dt>
|
||||
<dd><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).distance_to((Dr1</span> <span class="pre">const&)lhs)</span></tt>.</dd>
|
||||
<dt>then</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">-((Dr1</span> <span class="pre">const&)lhs).distance_to((Dr2</span> <span class="pre">const&)rhs)</span></tt>.</p>
|
||||
</dd>
|
||||
<dt>Otherwise,</dt>
|
||||
<dd><p class="first last"><tt class="docutils literal"><span class="pre">((Dr2</span> <span class="pre">const&)rhs).distance_to((Dr1</span> <span class="pre">const&)lhs)</span></tt>.</p>
|
||||
</dd>
|
||||
</dl>
|
||||
</td>
|
||||
</tr>
|
||||
@ -830,8 +1140,8 @@ operator -(iterator_facade<Dr1,V1,TC1,R1,D1> const& lhs,
|
||||
</table>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="tutorial-example">
|
||||
<h1><a class="toc-backref" href="#id31" name="tutorial-example">Tutorial Example</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id31" id="tutorial-example" name="tutorial-example">Tutorial Example</a></h1>
|
||||
<!-- Copyright David Abrahams 2004. Use, modification and distribution is -->
|
||||
<!-- subject to the Boost Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
@ -840,8 +1150,8 @@ iterators using <tt class="docutils literal"><span class="pre">iterator_facade</
|
||||
example of a linked list of polymorphic objects. This example was
|
||||
inspired by a <a class="reference" href="http://thread.gmane.org/gmane.comp.lib.boost.user/5100">posting</a> by Keith Macdonald on the <a class="reference" href="../../../more/mailing_lists.htm#users">Boost-Users</a>
|
||||
mailing list.</p>
|
||||
<div class="section" id="the-problem">
|
||||
<h2><a class="toc-backref" href="#id32" name="the-problem">The Problem</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id32" id="the-problem" name="the-problem">The Problem</a></h2>
|
||||
<p>Say we've written a polymorphic linked list node base class:</p>
|
||||
<pre class="literal-block">
|
||||
# include <iostream>
|
||||
@ -858,16 +1168,16 @@ struct node_base
|
||||
|
||||
// print to the stream
|
||||
virtual void print(std::ostream& s) const = 0;
|
||||
|
||||
|
||||
// double the value
|
||||
virtual void double_me() = 0;
|
||||
|
||||
void append(node_base* p)
|
||||
{
|
||||
if (m_next)
|
||||
m_next->append(p);
|
||||
if (m_next)
|
||||
m_next->append(p);
|
||||
else
|
||||
m_next = p;
|
||||
m_next = p;
|
||||
}
|
||||
|
||||
private:
|
||||
@ -902,8 +1212,8 @@ inline std::ostream& operator<<(std::ostream& s, node_base const&a
|
||||
<p>Our first challenge is to build an appropriate iterator over these
|
||||
lists.</p>
|
||||
</div>
|
||||
<div class="section" id="a-basic-iterator-using-iterator-facade">
|
||||
<h2><a class="toc-backref" href="#id33" name="a-basic-iterator-using-iterator-facade">A Basic Iterator Using <tt class="docutils literal"><span class="pre">iterator_facade</span></tt></a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id33" id="a-basic-iterator-using-iterator-facade" name="a-basic-iterator-using-iterator-facade">A Basic Iterator Using <tt class="docutils literal"><span class="pre">iterator_facade</span></tt></a></h2>
|
||||
<p>We will construct a <tt class="docutils literal"><span class="pre">node_iterator</span></tt> class using inheritance from
|
||||
<tt class="docutils literal"><span class="pre">iterator_facade</span></tt> to implement most of the iterator's operations.</p>
|
||||
<pre class="literal-block">
|
||||
@ -916,25 +1226,25 @@ class node_iterator
|
||||
...
|
||||
};
|
||||
</pre>
|
||||
<div class="section" id="template-arguments-for-iterator-facade">
|
||||
<h3><a class="toc-backref" href="#id34" name="template-arguments-for-iterator-facade">Template Arguments for <tt class="docutils literal"><span class="pre">iterator_facade</span></tt></a></h3>
|
||||
<div class="section">
|
||||
<h3><a class="toc-backref" href="#id34" id="template-arguments-for-iterator-facade" name="template-arguments-for-iterator-facade">Template Arguments for <tt class="docutils literal"><span class="pre">iterator_facade</span></tt></a></h3>
|
||||
<p><tt class="docutils literal"><span class="pre">iterator_facade</span></tt> has several template parameters, so we must decide
|
||||
what types to use for the arguments. The parameters are <tt class="docutils literal"><span class="pre">Derived</span></tt>,
|
||||
<tt class="docutils literal"><span class="pre">Value</span></tt>, <tt class="docutils literal"><span class="pre">CategoryOrTraversal</span></tt>, <tt class="docutils literal"><span class="pre">Reference</span></tt>, and <tt class="docutils literal"><span class="pre">Difference</span></tt>.</p>
|
||||
<div class="section" id="derived">
|
||||
<h4><a class="toc-backref" href="#id35" name="derived"><tt class="docutils literal"><span class="pre">Derived</span></tt></a></h4>
|
||||
<div class="section">
|
||||
<h4><a class="toc-backref" href="#id35" id="derived" name="derived"><tt class="docutils literal"><span class="pre">Derived</span></tt></a></h4>
|
||||
<p>Because <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> is meant to be used with the CRTP
|
||||
<a class="citation-reference" href="#cop95" id="id10" name="id10">[Cop95]</a> the first parameter is the iterator class name itself,
|
||||
<tt class="docutils literal"><span class="pre">node_iterator</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="value">
|
||||
<h4><a class="toc-backref" href="#id36" name="value"><tt class="docutils literal"><span class="pre">Value</span></tt></a></h4>
|
||||
<div class="section">
|
||||
<h4><a class="toc-backref" href="#id36" id="value" name="value"><tt class="docutils literal"><span class="pre">Value</span></tt></a></h4>
|
||||
<p>The <tt class="docutils literal"><span class="pre">Value</span></tt> parameter determines the <tt class="docutils literal"><span class="pre">node_iterator</span></tt>'s
|
||||
<tt class="docutils literal"><span class="pre">value_type</span></tt>. In this case, we are iterating over <tt class="docutils literal"><span class="pre">node_base</span></tt>
|
||||
objects, so <tt class="docutils literal"><span class="pre">Value</span></tt> will be <tt class="docutils literal"><span class="pre">node_base</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="categoryortraversal">
|
||||
<h4><a class="toc-backref" href="#id37" name="categoryortraversal"><tt class="docutils literal"><span class="pre">CategoryOrTraversal</span></tt></a></h4>
|
||||
<div class="section">
|
||||
<h4><a class="toc-backref" href="#id37" id="categoryortraversal" name="categoryortraversal"><tt class="docutils literal"><span class="pre">CategoryOrTraversal</span></tt></a></h4>
|
||||
<p>Now we have to determine which <a class="reference" href="new-iter-concepts.html#iterator-traversal-concepts-lib-iterator-traversal">iterator traversal concept</a> our
|
||||
<tt class="docutils literal"><span class="pre">node_iterator</span></tt> is going to model. Singly-linked lists only have
|
||||
forward links, so our iterator can't can't be a <a class="reference" href="new-iter-concepts.html#bidirectional-traversal-iterators-lib-bidirectional-traversal-iterators">bidirectional
|
||||
@ -953,8 +1263,8 @@ end up being <tt class="docutils literal"><span class="pre">std::forward_iterato
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<div class="section" id="id12">
|
||||
<h4><a class="toc-backref" href="#id38" name="id12"><tt class="docutils literal"><span class="pre">Reference</span></tt></a></h4>
|
||||
<div class="section">
|
||||
<h4><a class="toc-backref" href="#id38" id="id12" name="id12"><tt class="docutils literal"><span class="pre">Reference</span></tt></a></h4>
|
||||
<p>The <tt class="docutils literal"><span class="pre">Reference</span></tt> argument becomes the type returned by
|
||||
<tt class="docutils literal"><span class="pre">node_iterator</span></tt>'s dereference operation, and will also be the
|
||||
same as <tt class="docutils literal"><span class="pre">std::iterator_traits<node_iterator>::reference</span></tt>. The
|
||||
@ -962,8 +1272,8 @@ library's default for this parameter is <tt class="docutils literal"><span class
|
||||
<tt class="docutils literal"><span class="pre">node_base&</span></tt> is a good choice for the iterator's <tt class="docutils literal"><span class="pre">reference</span></tt>
|
||||
type, we can omit this argument, or pass <tt class="docutils literal"><span class="pre">use_default</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="difference">
|
||||
<h4><a class="toc-backref" href="#id39" name="difference"><tt class="docutils literal"><span class="pre">Difference</span></tt></a></h4>
|
||||
<div class="section">
|
||||
<h4><a class="toc-backref" href="#id39" id="difference" name="difference"><tt class="docutils literal"><span class="pre">Difference</span></tt></a></h4>
|
||||
<p>The <tt class="docutils literal"><span class="pre">Difference</span></tt> argument determines how the distance between
|
||||
two <tt class="docutils literal"><span class="pre">node_iterator</span></tt>s will be measured and will also be the
|
||||
same as <tt class="docutils literal"><span class="pre">std::iterator_traits<node_iterator>::difference_type</span></tt>.
|
||||
@ -989,8 +1299,8 @@ class node_iterator
|
||||
</pre>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="constructors-and-data-members">
|
||||
<h3><a class="toc-backref" href="#id40" name="constructors-and-data-members">Constructors and Data Members</a></h3>
|
||||
<div class="section">
|
||||
<h3><a class="toc-backref" href="#id40" id="constructors-and-data-members" name="constructors-and-data-members">Constructors and Data Members</a></h3>
|
||||
<p>Next we need to decide how to represent the iterator's position.
|
||||
This representation will take the form of data members, so we'll
|
||||
also need to write constructors to initialize them. The
|
||||
@ -1034,8 +1344,8 @@ default constructor to leave <tt class="docutils literal"><span class="pre">m_no
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<div class="section" id="implementing-the-core-operations">
|
||||
<h3><a class="toc-backref" href="#id41" name="implementing-the-core-operations">Implementing the Core Operations</a></h3>
|
||||
<div class="section">
|
||||
<h3><a class="toc-backref" href="#id41" id="implementing-the-core-operations" name="implementing-the-core-operations">Implementing the Core Operations</a></h3>
|
||||
<p>The last step is to implement the <a class="reference" href="#core-operations">core operations</a> required by
|
||||
the concepts we want our iterator to model. Referring to the
|
||||
<a class="reference" href="#core-operations">table</a>, we can see that the first three rows are applicable
|
||||
@ -1085,8 +1395,8 @@ class node_iterator
|
||||
iterator! For a working example of its use, see <a class="reference" href="../example/node_iterator1.cpp">this program</a>.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="a-constant-node-iterator">
|
||||
<h2><a class="toc-backref" href="#id42" name="a-constant-node-iterator">A constant <tt class="docutils literal"><span class="pre">node_iterator</span></tt></a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id42" id="a-constant-node-iterator" name="a-constant-node-iterator">A constant <tt class="docutils literal"><span class="pre">node_iterator</span></tt></a></h2>
|
||||
<div class="sidebar">
|
||||
<p class="first sidebar-title">Constant and Mutable iterators</p>
|
||||
<p>The term <strong>mutable iterator</strong> means an iterator through which
|
||||
@ -1186,8 +1496,8 @@ typedef node_iter<node_base> node_iterator;
|
||||
typedef node_iter<node_base const> node_const_iterator;
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section" id="interoperability">
|
||||
<h2><a class="toc-backref" href="#id43" name="interoperability">Interoperability</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id43" id="interoperability" name="interoperability">Interoperability</a></h2>
|
||||
<p>Our <tt class="docutils literal"><span class="pre">const_node_iterator</span></tt> works perfectly well on its own, but
|
||||
taken together with <tt class="docutils literal"><span class="pre">node_iterator</span></tt> it doesn't quite meet
|
||||
expectations. For example, we'd like to be able to pass a
|
||||
@ -1226,7 +1536,7 @@ class node_iter
|
||||
|
||||
template <class OtherValue>
|
||||
bool equal(node_iter<OtherValue> const& other) const
|
||||
{
|
||||
{
|
||||
return this->m_node == other.m_node;
|
||||
}
|
||||
|
||||
@ -1259,8 +1569,8 @@ traversal iterator</a>, we'd have had to templatize its
|
||||
<p>You can see an example program which exercises our interoperable
|
||||
iterators <a class="reference" href="../example/node_iterator2.cpp">here</a>.</p>
|
||||
</div>
|
||||
<div class="section" id="telling-the-truth">
|
||||
<h2><a class="toc-backref" href="#id44" name="telling-the-truth">Telling the Truth</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id44" id="telling-the-truth" name="telling-the-truth">Telling the Truth</a></h2>
|
||||
<p>Now <tt class="docutils literal"><span class="pre">node_iterator</span></tt> and <tt class="docutils literal"><span class="pre">node_const_iterator</span></tt> behave exactly as
|
||||
you'd expect... almost. We can compare them and we can convert in
|
||||
one direction: from <tt class="docutils literal"><span class="pre">node_iterator</span></tt> to <tt class="docutils literal"><span class="pre">node_const_iterator</span></tt>.
|
||||
@ -1286,7 +1596,7 @@ appropriate:</p>
|
||||
|
||||
...
|
||||
|
||||
private:
|
||||
private:
|
||||
struct enabler {};
|
||||
|
||||
public:
|
||||
@ -1301,8 +1611,8 @@ public:
|
||||
: m_node(other.m_node) {}
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section" id="wrap-up">
|
||||
<h2><a class="toc-backref" href="#id45" name="wrap-up">Wrap Up</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id45" id="wrap-up" name="wrap-up">Wrap Up</a></h2>
|
||||
<p>This concludes our <tt class="docutils literal"><span class="pre">iterator_facade</span></tt> tutorial, but before you
|
||||
stop reading we urge you to take a look at <a class="reference" href="iterator_adaptor.html"><tt class="docutils literal"><span class="pre">iterator_adaptor</span></tt></a>.
|
||||
There's another way to approach writing these iterators which might
|
||||
@ -1310,10 +1620,5 @@ even be superior.</p>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="iterator_facade.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
++++++++++++++++
|
||||
Iterator Facade
|
||||
++++++++++++++++
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
``iterator_facade`` is a base class template that implements the
|
||||
interface of standard iterators in terms of a few core functions
|
||||
and associated types, to be supplied by a derived iterator class.
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
.. Version 1.1 of this ReStructuredText document corresponds to
|
||||
n1530_, the paper accepted by the LWG for TR1.
|
||||
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
.. Version 1.3 of this ReStructuredText document corresponds to
|
||||
n1530_, the paper accepted by the LWG for TR1.
|
||||
|
||||
|
||||
@ -3,13 +3,295 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||
<meta name="generator" content="Docutils 0.3.8: http://docutils.sourceforge.net/" />
|
||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
||||
<title>Iterator Traits</title>
|
||||
<meta name="author" content="David Abrahams" />
|
||||
<meta name="organization" content="Boost Consulting" />
|
||||
<meta name="date" content="2004-11-01" />
|
||||
<meta name="copyright" content="Copyright David Abrahams 2004." />
|
||||
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||
<style type="text/css">
|
||||
|
||||
/*
|
||||
:Author: David Goodger
|
||||
:Contact: goodger@users.sourceforge.net
|
||||
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|
||||
:Revision: $Revision$
|
||||
:Copyright: This stylesheet has been placed in the public domain.
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||||
|
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Default cascading style sheet for the HTML output of Docutils.
|
||||
|
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See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
|
||||
customize this style sheet.
|
||||
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|
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|
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|
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The right padding separates the table cells. */
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|
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|
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|
||||
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|
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||||
dl.docutils dt {
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font-weight: bold }
|
||||
*/
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|
||||
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|
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<div class="document" id="iterator-traits">
|
||||
@ -30,41 +312,44 @@
|
||||
<td>Copyright David Abrahams 2004.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
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<!-- Software License, Version 1.0. (See accompanying -->
|
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<tr class="field"><th class="field-name">abstract:</th><td class="field-body">Header <tt class="docutils literal"><span class="pre"><boost/iterator/iterator_traits.hpp></span></tt> provides
|
||||
the ability to access an iterator's associated types using
|
||||
MPL-compatible <a class="reference" href="../../mpl/doc/refmanual/metafunction.html">metafunctions</a>.</td>
|
||||
MPL-compatible <a class="reference" href="../../mpl/doc/index.html#metafunctions">metafunctions</a>.</td>
|
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</tr>
|
||||
</tbody>
|
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</table>
|
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<div class="section" id="overview">
|
||||
<h1><a name="overview">Overview</a></h1>
|
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|
||||
<h1><a id="overview" name="overview">Overview</a></h1>
|
||||
<p><tt class="docutils literal"><span class="pre">std::iterator_traits</span></tt> provides access to five associated types
|
||||
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|
||||
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|
||||
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|
||||
metaprogramming context. <tt class="docutils literal"><span class="pre"><boost/iterator/iterator_traits.hpp></span></tt>
|
||||
provides access to these types using a standard <a class="reference" href="../../mpl/doc/refmanual/metafunction.html">metafunctions</a>.</p>
|
||||
provides access to these types using a standard <a class="reference" href="../../mpl/doc/index.html#metafunctions">metafunctions</a>.</p>
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|
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<h1><a name="summary">Summary</a></h1>
|
||||
<div class="section">
|
||||
<h1><a id="summary" name="summary">Summary</a></h1>
|
||||
<p>Header <tt class="docutils literal"><span class="pre"><boost/iterator/iterator_traits.hpp></span></tt>:</p>
|
||||
<pre class="literal-block">
|
||||
template <class Iterator>
|
||||
struct iterator_value
|
||||
{
|
||||
typedef typename
|
||||
std::iterator_traits<Iterator>::value_type
|
||||
typedef typename
|
||||
std::iterator_traits<Iterator>::value_type
|
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type;
|
||||
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|
||||
|
||||
template <class Iterator>
|
||||
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|
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|
||||
typedef typename
|
||||
typedef typename
|
||||
std::iterator_traits<Iterator>::reference
|
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type;
|
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|
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@ -73,8 +358,8 @@ struct iterator_reference
|
||||
template <class Iterator>
|
||||
struct iterator_pointer
|
||||
{
|
||||
typedef typename
|
||||
std::iterator_traits<Iterator>::pointer
|
||||
typedef typename
|
||||
std::iterator_traits<Iterator>::pointer
|
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type;
|
||||
};
|
||||
|
||||
@ -95,14 +380,14 @@ struct iterator_category
|
||||
};
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||||
</pre>
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||||
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<div class="section" id="broken-compiler-notes">
|
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<h1><a name="broken-compiler-notes">Broken Compiler Notes</a></h1>
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<div class="section">
|
||||
<h1><a id="broken-compiler-notes" name="broken-compiler-notes">Broken Compiler Notes</a></h1>
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<p>Because of workarounds in Boost, you may find that these
|
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|
||||
<a class="reference" href="../../mpl/doc/index.html#metafunctions">metafunctions</a> actually work better than the facilities provided by
|
||||
your compiler's standard library.</p>
|
||||
<p>On compilers that don't support partial specialization, such as
|
||||
Microsoft Visual C++ 6.0 or 7.0, you may need to manually invoke
|
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<a class="reference" href="../../../doc/html/boost_typetraits/category.html#boost_typetraits.transform">BOOST_BROKEN_COMPILER_TYPE_TRAITS_SPECIALIZATION</a> on the
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<a class="reference" href="../../type_traits/index.html#transformations">BOOST_BROKEN_COMPILER_TYPE_TRAITS_SPECIALIZATION</a> on the
|
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<tt class="docutils literal"><span class="pre">value_type</span></tt> of pointers that are passed to these metafunctions.</p>
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||||
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@ -111,10 +396,5 @@ either <tt class="docutils literal"><span class="pre">iterator_category</span></
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<a class="reference" href="iterator_traits.rst">View document source</a>.
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Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
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@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
+++++++++++++++++
|
||||
Iterator Traits
|
||||
+++++++++++++++++
|
||||
|
||||
@ -1,3 +1,6 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
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.. Software License, Version 1.0. (See accompanying
|
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.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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|
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|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template <class Predicate, class Iterator>
|
||||
filter_iterator<Predicate,Iterator>
|
||||
make_filter_iterator(Predicate f, Iterator x, Iterator end = Iterator());
|
||||
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|
||||
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<col class="field-name" />
|
||||
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|
||||
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|
||||
@ -27,7 +312,7 @@ template <class Predicate, class Iterator>
|
||||
filter_iterator<Predicate,Iterator>
|
||||
make_filter_iterator(Iterator x, Iterator end = Iterator());
|
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|
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@ -36,10 +321,5 @@ make_filter_iterator(Iterator x, Iterator end = Iterator());
|
||||
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|
||||
</table>
|
||||
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|
||||
<hr class="footer" />
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||||
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|
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<a class="reference" href="make_filter_iterator.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
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@ -1,3 +1,6 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
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|
||||
::
|
||||
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
::
|
||||
|
||||
template <class BidirectionalIterator>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
::
|
||||
|
||||
template <class UnaryFunction, class Iterator>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
::
|
||||
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template<typename IteratorTuple>
|
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@ -3,13 +3,295 @@
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<title>New Iterator Concepts</title>
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<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
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<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, Zephyr Associates, Inc." />
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<meta name="date" content="2004-11-01" />
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<meta name="date" content="2006-04-30" />
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|
||||
<body>
|
||||
<div class="document" id="new-iterator-concepts">
|
||||
@ -26,8 +308,8 @@
|
||||
<td><a class="first reference" href="http://www.boost-consulting.com">Boost Consulting</a>, Indiana University <a class="reference" href="http://www.osl.iu.edu">Open Systems
|
||||
Lab</a>, <a class="last reference" href="http://www.styleadvisor.com">Zephyr Associates, Inc.</a></td></tr>
|
||||
<tr><th class="docinfo-name">Date:</th>
|
||||
<td>2004-11-01</td></tr>
|
||||
<tr class="field"><th class="docinfo-name">Number:</th><td class="field-body">This is a revised version of <a class="reference" href="http://www.open-std.org/jtc1/sc22/WG21/docs/papers/2003/n1550.htm">n1550</a>=03-0133, which was
|
||||
<td>2006-04-30</td></tr>
|
||||
<tr class="field"><th class="docinfo-name">Number:</th><td class="field-body">This is a revised version of <a class="reference" href="http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/papers/2003/n1550.html">n1550</a>=03-0133, which was
|
||||
accepted for Technical Report 1 by the C++ standard
|
||||
committee's library working group. This proposal is a
|
||||
revision of paper <a class="reference" href="http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/papers/2001/n1297.html">n1297</a>, <a class="reference" href="http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/papers/2003/n1477.html">n1477</a>, and <a class="reference" href="http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/papers/2003/n1531.html">n1531</a>.</td>
|
||||
@ -37,6 +319,9 @@ revision of paper <a class="reference" href="http://anubis.dkuug.dk/jtc1/sc22/wg
|
||||
2003.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<!-- Version 1.25 of this ReStructuredText document is the same as
|
||||
n1550_, the paper accepted by the LWG. -->
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
@ -1014,10 +1299,5 @@ LocalWords: incrementable xxx min prev inplace png oldeqnew AccessTag struct
|
||||
LocalWords: TraversalTag typename lvalues DWA Hmm JGS mis enum -->
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="new-iter-concepts.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
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|
||||
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|
||||
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|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
++++++++++++++++++++++
|
||||
New Iterator Concepts
|
||||
++++++++++++++++++++++
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
The permutation iterator adaptor provides a permuted view of a given
|
||||
range. That is, the view includes every element of the given range but
|
||||
in a potentially different order.
|
||||
|
||||
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||||
<title>Permutation Iterator</title>
|
||||
<meta name="author" content="Toon Knapen, David Abrahams, Roland Richter, Jeremy Siek" />
|
||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab" />
|
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<meta name="date" content="2004-11-01" />
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|
||||
<div class="document" id="permutation-iterator">
|
||||
@ -31,18 +313,24 @@ Lab</a></td></tr>
|
||||
<td>Copyright Toon Knapen, David Abrahams, Roland Richter, and Jeremy Siek 2003.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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<col class="field-body" />
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|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The permutation iterator adaptor provides a permuted view of a given
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
The permutation iterator adaptor provides a permuted view of a given
|
||||
range. That is, the view includes every element of the given range but
|
||||
in a potentially different order.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#introduction" id="id2" name="id2">Introduction</a></li>
|
||||
<li><a class="reference" href="#reference" id="id3" name="id3">Reference</a><ul>
|
||||
@ -54,8 +342,11 @@ in a potentially different order.</td>
|
||||
<li><a class="reference" href="#example" id="id7" name="id7">Example</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="introduction">
|
||||
<h1><a class="toc-backref" href="#id2" name="introduction">Introduction</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id2" id="introduction" name="introduction">Introduction</a></h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<p>The adaptor takes two arguments:</p>
|
||||
<blockquote>
|
||||
<ul class="simple">
|
||||
@ -74,8 +365,11 @@ to be unique. In this same context, it must be noted that the past the
|
||||
end permutation iterator is completely defined by means of the
|
||||
past-the-end iterator to the indices.</p>
|
||||
</div>
|
||||
<div class="section" id="reference">
|
||||
<h1><a class="toc-backref" href="#id3" name="reference">Reference</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id3" id="reference" name="reference">Reference</a></h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template< class ElementIterator
|
||||
, class IndexIterator
|
||||
@ -104,28 +398,28 @@ private:
|
||||
};
|
||||
|
||||
template <class ElementIterator, class IndexIterator>
|
||||
permutation_iterator<ElementIterator, IndexIterator>
|
||||
permutation_iterator<ElementIterator, IndexIterator>
|
||||
make_permutation_iterator( ElementIterator e, IndexIterator i);
|
||||
</pre>
|
||||
<div class="section" id="permutation-iterator-requirements">
|
||||
<h2><a class="toc-backref" href="#id4" name="permutation-iterator-requirements"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> requirements</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id4" id="permutation-iterator-requirements" name="permutation-iterator-requirements"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> requirements</a></h2>
|
||||
<p><tt class="docutils literal"><span class="pre">ElementIterator</span></tt> shall model Random Access Traversal Iterator.
|
||||
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|
||||
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|
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|
||||
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|
||||
<div class="section" id="permutation-iterator-models">
|
||||
<h2><a class="toc-backref" href="#id5" name="permutation-iterator-models"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id5" id="permutation-iterator-models" name="permutation-iterator-models"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models</a></h2>
|
||||
<p><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models the same iterator traversal concepts
|
||||
as <tt class="docutils literal"><span class="pre">IndexIterator</span></tt> and the same iterator access concepts as
|
||||
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|
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|
||||
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|
||||
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|
||||
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|
||||
<tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models Forward Iterator.</p>
|
||||
<p>If <tt class="docutils literal"><span class="pre">IndexIterator</span></tt> models Bidirectional Traversal Iterator and
|
||||
<p>If <tt class="docutils literal"><span class="pre">IndexIterator</span></tt> models Bidirectional Traversal Iterator and
|
||||
<tt class="docutils literal"><span class="pre">ElementIterator</span></tt> models Readable Lvalue Iterator then
|
||||
<tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models Bidirectional Iterator.</p>
|
||||
<p>If <tt class="docutils literal"><span class="pre">IndexIterator</span></tt> models Random Access Traversal Iterator and
|
||||
@ -136,8 +430,8 @@ with <tt class="docutils literal"><span class="pre">permutation_iterator<E2,<
|
||||
<tt class="docutils literal"><span class="pre">X</span></tt> is interoperable with <tt class="docutils literal"><span class="pre">Y</span></tt> and <tt class="docutils literal"><span class="pre">E1</span></tt> is convertible
|
||||
to <tt class="docutils literal"><span class="pre">E2</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="permutation-iterator-operations">
|
||||
<h2><a class="toc-backref" href="#id6" name="permutation-iterator-operations"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> operations</a></h2>
|
||||
<div class="section">
|
||||
<h2><a class="toc-backref" href="#id6" id="permutation-iterator-operations" name="permutation-iterator-operations"><tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> operations</a></h2>
|
||||
<p>In addition to those operations required by the concepts that
|
||||
<tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> models, <tt class="docutils literal"><span class="pre">permutation_iterator</span></tt> provides the
|
||||
following operations.</p>
|
||||
@ -207,7 +501,7 @@ permutation_iterator(
|
||||
</table>
|
||||
<pre class="literal-block">
|
||||
template <class ElementIterator, class IndexIterator>
|
||||
permutation_iterator<ElementIterator, IndexIterator>
|
||||
permutation_iterator<ElementIterator, IndexIterator>
|
||||
make_permutation_iterator(ElementIterator e, IndexIterator i);
|
||||
</pre>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
@ -220,8 +514,11 @@ make_permutation_iterator(ElementIterator e, IndexIterator i);
|
||||
</table>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="example">
|
||||
<h1><a class="toc-backref" href="#id7" name="example">Example</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id7" id="example" name="example">Example</a></h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
using namespace boost;
|
||||
int i = 0;
|
||||
@ -237,7 +534,7 @@ for(element_range_type::iterator el_it = elements.begin() ; el_it != elements.en
|
||||
*el_it = std::distance(elements.begin(), el_it);
|
||||
|
||||
index_type indices( index_size );
|
||||
for(index_type::iterator i_it = indices.begin() ; i_it != indices.end() ; ++i_it )
|
||||
for(index_type::iterator i_it = indices.begin() ; i_it != indices.end() ; ++i_it )
|
||||
*i_it = element_range_size - index_size + std::distance(indices.begin(), i_it);
|
||||
std::reverse( indices.begin(), indices.end() );
|
||||
|
||||
@ -276,20 +573,15 @@ std::cout << "\n";
|
||||
</pre>
|
||||
<p>The output is:</p>
|
||||
<pre class="literal-block">
|
||||
The original range is : 0 1 2 3 4 5 6 7 8 9
|
||||
The reindexing scheme is : 9 8 7 6
|
||||
The permutated range is : 9 8 7 6
|
||||
Elements at even indices in the permutation : 9 7
|
||||
Permutation backwards : 6 7 8 9
|
||||
Iterate backward with stride 2 : 6 8
|
||||
The original range is : 0 1 2 3 4 5 6 7 8 9
|
||||
The reindexing scheme is : 9 8 7 6
|
||||
The permutated range is : 9 8 7 6
|
||||
Elements at even indices in the permutation : 9 7
|
||||
Permutation backwards : 6 7 8 9
|
||||
Iterate backward with stride 2 : 6 8
|
||||
</pre>
|
||||
<p>The source code for this example can be found <a class="reference" href="../example/permutation_iter_example.cpp">here</a>.</p>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="permutation_iterator.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
++++++++++++++++++++++
|
||||
Permutation Iterator
|
||||
++++++++++++++++++++++
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
The adaptor takes two arguments:
|
||||
|
||||
* an iterator to the range V on which the permutation
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
::
|
||||
|
||||
using namespace boost;
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
.. parsed-literal::
|
||||
|
||||
template< class ElementIterator
|
||||
|
||||
318
doc/pointee.html
318
doc/pointee.html
@ -3,13 +3,295 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||
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|
||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
||||
<title>pointee and indirect_reference</title>
|
||||
<meta name="author" content="David Abrahams" />
|
||||
<meta name="organization" content="Boost Consulting" />
|
||||
<meta name="date" content="2005-02-27" />
|
||||
<meta name="copyright" content="Copyright David Abrahams 2004." />
|
||||
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||
<style type="text/css">
|
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|
||||
/*
|
||||
:Author: David Goodger
|
||||
:Contact: goodger@users.sourceforge.net
|
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|
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:Revision: $Revision$
|
||||
:Copyright: This stylesheet has been placed in the public domain.
|
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|
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Default cascading style sheet for the HTML output of Docutils.
|
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|
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See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
||||
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|
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</head>
|
||||
<body>
|
||||
<div class="document" id="pointee-and-indirect-reference">
|
||||
@ -30,6 +312,9 @@
|
||||
<td>Copyright David Abrahams 2004.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
@ -39,8 +324,8 @@ pointers, smart pointers and iterators in generic code.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="section" id="overview">
|
||||
<h1><a name="overview">Overview</a></h1>
|
||||
<div class="section">
|
||||
<h1><a id="overview" name="overview">Overview</a></h1>
|
||||
<p>Have you ever wanted to write a generic function that can operate
|
||||
on any kind of dereferenceable object? If you have, you've
|
||||
probably run into the problem of how to determine the type that the
|
||||
@ -53,8 +338,8 @@ void f(Dereferenceable p)
|
||||
...
|
||||
}
|
||||
</pre>
|
||||
<div class="section" id="pointee">
|
||||
<h2><a name="pointee"><tt class="docutils literal"><span class="pre">pointee</span></tt></a></h2>
|
||||
<div class="section">
|
||||
<h2><a id="pointee" name="pointee"><tt class="docutils literal"><span class="pre">pointee</span></tt></a></h2>
|
||||
<p>It turns out to be impossible to come up with a fully-general
|
||||
algorithm to do determine <em>what-goes-here</em> directly, but it is
|
||||
possible to require that <tt class="docutils literal"><span class="pre">pointee<Dereferenceable>::type</span></tt> is
|
||||
@ -75,8 +360,8 @@ namespace boost
|
||||
}
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section" id="indirect-reference">
|
||||
<h2><a name="indirect-reference"><tt class="docutils literal"><span class="pre">indirect_reference</span></tt></a></h2>
|
||||
<div class="section">
|
||||
<h2><a id="indirect-reference" name="indirect-reference"><tt class="docutils literal"><span class="pre">indirect_reference</span></tt></a></h2>
|
||||
<p><tt class="docutils literal"><span class="pre">indirect_reference<T>::type</span></tt> is rather more specialized than
|
||||
<tt class="docutils literal"><span class="pre">pointee</span></tt>, and is meant to be used to forward the result of
|
||||
dereferencing an object of its argument type. Most dereferenceable
|
||||
@ -87,10 +372,10 @@ information is needed, call on <tt class="docutils literal"><span class="pre">in
|
||||
<a class="reference" href="indirect_iterator.html"><tt class="docutils literal"><span class="pre">indirect_iterator</span></tt></a>.</p>
|
||||
</div>
|
||||
</div>
|
||||
<div class="section" id="reference">
|
||||
<h1><a name="reference">Reference</a></h1>
|
||||
<div class="section" id="id1">
|
||||
<h2><a name="id1"><tt class="docutils literal"><span class="pre">pointee</span></tt></a></h2>
|
||||
<div class="section">
|
||||
<h1><a id="reference" name="reference">Reference</a></h1>
|
||||
<div class="section">
|
||||
<h2><a id="id1" name="id1"><tt class="docutils literal"><span class="pre">pointee</span></tt></a></h2>
|
||||
<!-- Copyright David Abrahams 2004. Use, modification and distribution is -->
|
||||
<!-- subject to the Boost Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
@ -133,8 +418,8 @@ else
|
||||
}
|
||||
</pre>
|
||||
</div>
|
||||
<div class="section" id="id2">
|
||||
<h2><a name="id2"><tt class="docutils literal"><span class="pre">indirect_reference</span></tt></a></h2>
|
||||
<div class="section">
|
||||
<h2><a id="id2" name="id2"><tt class="docutils literal"><span class="pre">indirect_reference</span></tt></a></h2>
|
||||
<!-- Copyright David Abrahams 2004. Use, modification and distribution is -->
|
||||
<!-- subject to the Boost Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
@ -170,10 +455,5 @@ else
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="pointee.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
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++++++++++++++++++++++++++++++++++++++++
|
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``pointee`` and ``indirect_reference``
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</head>
|
||||
<body>
|
||||
<h1 class="title">Problem with <tt class="literal"><span class="pre">reference</span></tt> and old/new iterator category correspondance</h1>
|
||||
<div class="document" id="problem-with-reference-and-old-new-iterator-category-correspondance">
|
||||
<table class="field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<h1 class="title">Problem with <tt class="docutils literal"><span class="pre">reference</span></tt> and old/new iterator category correspondance</h1>
|
||||
<table class="docinfo" frame="void" rules="none">
|
||||
<col class="docinfo-name" />
|
||||
<col class="docinfo-content" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Author:</th><td class="field-body">David Abrahams and Jeremy Siek</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Contact:</th><td class="field-body"><a class="reference" href="mailto:dave@boost-consulting.com">dave@boost-consulting.com</a>, <a class="reference" href="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</a></td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Organization:</th><td class="field-body"><a class="reference" href="http://www.boost-consulting.com">Boost Consulting</a>, Indiana University Bloomington</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">date:</th><td class="field-body">$Date$</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Copyright:</th><td class="field-body">Copyright David Abrahams, Jeremy Siek 2003. Use, modification and
|
||||
<tr><th class="docinfo-name">Author:</th>
|
||||
<td>David Abrahams and Jeremy Siek</td></tr>
|
||||
<tr><th class="docinfo-name">Contact:</th>
|
||||
<td><a class="first reference" href="mailto:dave@boost-consulting.com">dave@boost-consulting.com</a>, <a class="last reference" href="mailto:jsiek@osl.iu.edu">jsiek@osl.iu.edu</a></td></tr>
|
||||
<tr><th class="docinfo-name">Organization:</th>
|
||||
<td><a class="first reference" href="http://www.boost-consulting.com">Boost Consulting</a>, Indiana University Bloomington</td></tr>
|
||||
<tr><th class="docinfo-name">Date:</th>
|
||||
<td>2003-11-17</td></tr>
|
||||
<tr><th class="docinfo-name">Copyright:</th>
|
||||
<td>Copyright David Abrahams, Jeremy Siek 2003. Use, modification and
|
||||
distribution is subject to the Boost Software License,
|
||||
Version 1.0. (See accompanying file LICENSE_1_0.txt or copy
|
||||
at <a class="reference" href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</td>
|
||||
</tr>
|
||||
at <a class="reference" href="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</a>)</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="section" id="introduction">
|
||||
<h1><a name="introduction">Introduction</a></h1>
|
||||
<div class="section">
|
||||
<h1><a id="introduction" name="introduction">Introduction</a></h1>
|
||||
<p>The new iterator categories are intended to correspond to the old
|
||||
iterator categories, as specified in a diagram in <a class="reference" href="http://www.boost-consulting.com/writing/n1550.html">N1550</a>. For example,
|
||||
an iterator categorized as a mutable Forward Iterator under the old
|
||||
scheme is now a Writable, Lvalue, and Foward Traversal iterator.
|
||||
However, there is a problem with this correspondance, the new iterator
|
||||
categories place requirements on the <tt class="literal"><span class="pre">iterator_traits<X>::reference</span></tt>
|
||||
categories place requirements on the <tt class="docutils literal"><span class="pre">iterator_traits<X>::reference</span></tt>
|
||||
type whereas the standard iterator requirements say nothing about the
|
||||
<tt class="literal"><span class="pre">reference</span></tt> type . In particular, the new Readable Iterator
|
||||
requirements say that the return type of <tt class="literal"><span class="pre">*a</span></tt> must be
|
||||
<tt class="literal"><span class="pre">iterator_traits<X>::reference</span></tt> and the Lvalue Iterator requirements
|
||||
says that <tt class="literal"><span class="pre">iterator_traits<X>::reference</span></tt> must be <tt class="literal"><span class="pre">T&</span></tt> or <tt class="literal"><span class="pre">const</span>
|
||||
<tt class="docutils literal"><span class="pre">reference</span></tt> type . In particular, the new Readable Iterator
|
||||
requirements say that the return type of <tt class="docutils literal"><span class="pre">*a</span></tt> must be
|
||||
<tt class="docutils literal"><span class="pre">iterator_traits<X>::reference</span></tt> and the Lvalue Iterator requirements
|
||||
says that <tt class="docutils literal"><span class="pre">iterator_traits<X>::reference</span></tt> must be <tt class="docutils literal"><span class="pre">T&</span></tt> or <tt class="docutils literal"><span class="pre">const</span>
|
||||
<span class="pre">T&</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="proposed-resolution">
|
||||
<h1><a name="proposed-resolution">Proposed Resolution</a></h1>
|
||||
<div class="section">
|
||||
<h1><a id="proposed-resolution" name="proposed-resolution">Proposed Resolution</a></h1>
|
||||
<p>Change the standard requirements to match the requirements of the new
|
||||
iterators. (more details to come)</p>
|
||||
</div>
|
||||
<div class="section" id="rationale">
|
||||
<h1><a name="rationale">Rationale</a></h1>
|
||||
<p>The lack of specification in the standard of the <tt class="literal"><span class="pre">reference</span></tt> type is
|
||||
<div class="section">
|
||||
<h1><a id="rationale" name="rationale">Rationale</a></h1>
|
||||
<p>The lack of specification in the standard of the <tt class="docutils literal"><span class="pre">reference</span></tt> type is
|
||||
certainly a defect. Without specification, it is entirely useless in a
|
||||
generic function. The current practice in the community is generally
|
||||
to assume there are requirements on the <tt class="literal"><span class="pre">reference</span></tt> type, such as
|
||||
to assume there are requirements on the <tt class="docutils literal"><span class="pre">reference</span></tt> type, such as
|
||||
those proposed in the new iterator categories.</p>
|
||||
<p>There is some danger in <em>adding</em> requirements to existing concepts.
|
||||
This will mean that some existing iterator types will no longer meet
|
||||
the iterator requirements. However, we feel that the impact of this is
|
||||
small enough to warrant going ahead with this change.</p>
|
||||
<p>An alternative solution would be to leave the standard requirements as
|
||||
is, and to remove the requirements for the <tt class="literal"><span class="pre">reference</span></tt> type in the
|
||||
is, and to remove the requirements for the <tt class="docutils literal"><span class="pre">reference</span></tt> type in the
|
||||
new iterator concepts. We are not in favor of this approach because it
|
||||
extends what we see as a defect further into the future.</p>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="ref_problem.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -3,13 +3,295 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||
<meta name="generator" content="Docutils 0.3.8: http://docutils.sourceforge.net/" />
|
||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
||||
<title>Reverse Iterator</title>
|
||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, University of Hanover Institute for Transport Railway Operation and Construction" />
|
||||
<meta name="date" content="2004-11-01" />
|
||||
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|
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|
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|
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|
||||
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|
||||
</head>
|
||||
<body>
|
||||
<div class="document" id="reverse-iterator">
|
||||
@ -32,17 +314,23 @@ Railway Operation and Construction</a></td></tr>
|
||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The reverse iterator adaptor iterates through the adapted iterator
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
The reverse iterator adaptor iterates through the adapted iterator
|
||||
range in the opposite direction.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#reverse-iterator-synopsis" id="id2" name="id2"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> synopsis</a></li>
|
||||
<li><a class="reference" href="#reverse-iterator-requirements" id="id3" name="id3"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> requirements</a></li>
|
||||
@ -51,8 +339,11 @@ range in the opposite direction.</td>
|
||||
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="reverse-iterator-synopsis">
|
||||
<h1><a class="toc-backref" href="#id2" name="reverse-iterator-synopsis"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> synopsis</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id2" id="reverse-iterator-synopsis" name="reverse-iterator-synopsis"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> synopsis</a></h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template <class Iterator>
|
||||
class reverse_iterator
|
||||
@ -88,14 +379,14 @@ Lvalue Iterator, then <tt class="docutils literal"><span class="pre">iterator_ca
|
||||
<tt class="docutils literal"><span class="pre">bidirectional_iterator_tag</span></tt>. Otherwise, <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is
|
||||
convertible to <tt class="docutils literal"><span class="pre">input_iterator_tag</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="reverse-iterator-requirements">
|
||||
<h1><a class="toc-backref" href="#id3" name="reverse-iterator-requirements"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> requirements</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id3" id="reverse-iterator-requirements" name="reverse-iterator-requirements"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> requirements</a></h1>
|
||||
<p><tt class="docutils literal"><span class="pre">Iterator</span></tt> must be a model of Bidirectional Traversal Iterator. The
|
||||
type <tt class="docutils literal"><span class="pre">iterator_traits<Iterator>::reference</span></tt> must be the type of
|
||||
<tt class="docutils literal"><span class="pre">*i</span></tt>, where <tt class="docutils literal"><span class="pre">i</span></tt> is an object of type <tt class="docutils literal"><span class="pre">Iterator</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="reverse-iterator-models">
|
||||
<h1><a class="toc-backref" href="#id4" name="reverse-iterator-models"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> models</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id4" id="reverse-iterator-models" name="reverse-iterator-models"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> models</a></h1>
|
||||
<p>A specialization of <tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> models the same iterator
|
||||
traversal and iterator access concepts modeled by its <tt class="docutils literal"><span class="pre">Iterator</span></tt>
|
||||
argument. In addition, it may model old iterator concepts
|
||||
@ -106,8 +397,8 @@ specified in the following table:</p>
|
||||
<col width="47%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr><th>If <tt class="docutils literal"><span class="pre">I</span></tt> models</th>
|
||||
<th>then <tt class="docutils literal"><span class="pre">reverse_iterator<I></span></tt> models</th>
|
||||
<tr><th class="head">If <tt class="docutils literal"><span class="pre">I</span></tt> models</th>
|
||||
<th class="head">then <tt class="docutils literal"><span class="pre">reverse_iterator<I></span></tt> models</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody valign="top">
|
||||
@ -133,8 +424,8 @@ Random Access Traversal Iterator</td>
|
||||
<tt class="docutils literal"><span class="pre">reverse_iterator<Y></span></tt> if and only if <tt class="docutils literal"><span class="pre">X</span></tt> is interoperable with
|
||||
<tt class="docutils literal"><span class="pre">Y</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="reverse-iterator-operations">
|
||||
<h1><a class="toc-backref" href="#id5" name="reverse-iterator-operations"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> operations</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id5" id="reverse-iterator-operations" name="reverse-iterator-operations"><tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> operations</a></h1>
|
||||
<p>In addition to the operations required by the concepts modeled by
|
||||
<tt class="docutils literal"><span class="pre">reverse_iterator</span></tt>, <tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> provides the following
|
||||
operations.</p>
|
||||
@ -145,7 +436,7 @@ operations.</p>
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">Iterator</span></tt> must be Default Constructible.</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> with <tt class="docutils literal"><span class="pre">m_iterator</span></tt>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs an instance of <tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> with <tt class="docutils literal"><span class="pre">m_iterator</span></tt>
|
||||
default constructed.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
@ -173,7 +464,7 @@ reverse_iterator(
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">Requires:</th><td class="field-body"><tt class="docutils literal"><span class="pre">OtherIterator</span></tt> is implicitly convertible to <tt class="docutils literal"><span class="pre">Iterator</span></tt>.</td>
|
||||
</tr>
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs instance of <tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> whose
|
||||
<tr class="field"><th class="field-name">Effects:</th><td class="field-body">Constructs instance of <tt class="docutils literal"><span class="pre">reverse_iterator</span></tt> whose
|
||||
<tt class="docutils literal"><span class="pre">m_iterator</span></tt> subobject is constructed from <tt class="docutils literal"><span class="pre">y.base()</span></tt>.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
@ -222,6 +513,9 @@ return *--tmp;
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template <class BidirectionalIterator>
|
||||
reverse_iterator<BidirectionalIterator>n
|
||||
@ -236,9 +530,12 @@ with a <tt class="docutils literal"><span class="pre">current</span></tt> constr
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
</div>
|
||||
<div class="section" id="example">
|
||||
<h1><a class="toc-backref" href="#id6" name="example">Example</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id6" id="example" name="example">Example</a></h1>
|
||||
<p>The following example prints an array of characters in reverse order
|
||||
using <tt class="docutils literal"><span class="pre">reverse_iterator</span></tt>.</p>
|
||||
<pre class="literal-block">
|
||||
@ -272,10 +569,5 @@ sequence in double-reversed (normal) order: hello world!
|
||||
<p>The source code for this example can be found <a class="reference" href="../example/reverse_iterator_example.cpp">here</a>.</p>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="reverse_iterator.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
++++++++++++++++++
|
||||
Reverse Iterator
|
||||
++++++++++++++++++
|
||||
|
||||
@ -1,3 +1,6 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
The reverse iterator adaptor iterates through the adapted iterator
|
||||
range in the opposite direction.
|
||||
|
||||
@ -1,3 +1,6 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Example
|
||||
.......
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
::
|
||||
|
||||
template <class Iterator>
|
||||
|
||||
@ -1,7 +1,10 @@
|
||||
#!/bin/sh
|
||||
# Copyright David Abrahams 2006. Distributed under the Boost
|
||||
# Software License, Version 1.0. (See accompanying
|
||||
# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
PYTHONPATH="c:/src/docutils;c:/src/docutils/extras"
|
||||
export PYTHONPATH
|
||||
python c:/src/docutils/tools/rst2html.py -gs $1 `echo $1 | sed 's/\(.*\)\..*/\1.html/'`
|
||||
python rst2html.py -gs $1 `echo $1 | sed 's/\(.*\)\..*/\1.html/'`
|
||||
|
||||
|
||||
|
||||
|
||||
@ -1,4 +1,7 @@
|
||||
#!/bin/sh
|
||||
# Copyright David Abrahams 2006. Distributed under the Boost
|
||||
# Software License, Version 1.0. (See accompanying
|
||||
# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
PYTHONPATH="c:/src/docutils;c:/src/docutils/extras"
|
||||
export PYTHONPATH
|
||||
python c:/src/docutils/tools/rst2latex.py --documentoptions pdftex --stylesheet=docutils.sty $1 `echo $1 | sed 's/\(.*\)\..*/\1.tex/'`
|
||||
|
||||
@ -3,13 +3,295 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
||||
<head>
|
||||
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||||
<meta name="generator" content="Docutils 0.3.8: http://docutils.sourceforge.net/" />
|
||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
||||
<title>Transform Iterator</title>
|
||||
<meta name="author" content="David Abrahams, Jeremy Siek, Thomas Witt" />
|
||||
<meta name="organization" content="Boost Consulting, Indiana University Open Systems Lab, University of Hanover Institute for Transport Railway Operation and Construction" />
|
||||
<meta name="date" content="2004-11-01" />
|
||||
<meta name="copyright" content="Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003." />
|
||||
<link rel="stylesheet" href="default.css" type="text/css" />
|
||||
<style type="text/css">
|
||||
|
||||
/*
|
||||
:Author: David Goodger
|
||||
:Contact: goodger@users.sourceforge.net
|
||||
:Date: $Date$
|
||||
:Revision: $Revision$
|
||||
:Copyright: This stylesheet has been placed in the public domain.
|
||||
|
||||
Default cascading style sheet for the HTML output of Docutils.
|
||||
|
||||
See http://docutils.sf.net/docs/howto/html-stylesheets.html for how to
|
||||
customize this style sheet.
|
||||
*/
|
||||
|
||||
/* used to remove borders from tables and images */
|
||||
.borderless, table.borderless td, table.borderless th {
|
||||
border: 0 }
|
||||
|
||||
table.borderless td, table.borderless th {
|
||||
/* Override padding for "table.docutils td" with "! important".
|
||||
The right padding separates the table cells. */
|
||||
padding: 0 0.5em 0 0 ! important }
|
||||
|
||||
.first {
|
||||
/* Override more specific margin styles with "! important". */
|
||||
margin-top: 0 ! important }
|
||||
|
||||
.last, .with-subtitle {
|
||||
margin-bottom: 0 ! important }
|
||||
|
||||
.hidden {
|
||||
display: none }
|
||||
|
||||
a.toc-backref {
|
||||
text-decoration: none ;
|
||||
color: black }
|
||||
|
||||
blockquote.epigraph {
|
||||
margin: 2em 5em ; }
|
||||
|
||||
dl.docutils dd {
|
||||
margin-bottom: 0.5em }
|
||||
|
||||
/* Uncomment (and remove this text!) to get bold-faced definition list terms
|
||||
dl.docutils dt {
|
||||
font-weight: bold }
|
||||
*/
|
||||
|
||||
div.abstract {
|
||||
margin: 2em 5em }
|
||||
|
||||
div.abstract p.topic-title {
|
||||
font-weight: bold ;
|
||||
text-align: center }
|
||||
|
||||
div.admonition, div.attention, div.caution, div.danger, div.error,
|
||||
div.hint, div.important, div.note, div.tip, div.warning {
|
||||
margin: 2em ;
|
||||
border: medium outset ;
|
||||
padding: 1em }
|
||||
|
||||
div.admonition p.admonition-title, div.hint p.admonition-title,
|
||||
div.important p.admonition-title, div.note p.admonition-title,
|
||||
div.tip p.admonition-title {
|
||||
font-weight: bold ;
|
||||
font-family: sans-serif }
|
||||
|
||||
div.attention p.admonition-title, div.caution p.admonition-title,
|
||||
div.danger p.admonition-title, div.error p.admonition-title,
|
||||
div.warning p.admonition-title {
|
||||
color: red ;
|
||||
font-weight: bold ;
|
||||
font-family: sans-serif }
|
||||
|
||||
/* Uncomment (and remove this text!) to get reduced vertical space in
|
||||
compound paragraphs.
|
||||
div.compound .compound-first, div.compound .compound-middle {
|
||||
margin-bottom: 0.5em }
|
||||
|
||||
div.compound .compound-last, div.compound .compound-middle {
|
||||
margin-top: 0.5em }
|
||||
*/
|
||||
|
||||
div.dedication {
|
||||
margin: 2em 5em ;
|
||||
text-align: center ;
|
||||
font-style: italic }
|
||||
|
||||
div.dedication p.topic-title {
|
||||
font-weight: bold ;
|
||||
font-style: normal }
|
||||
|
||||
div.figure {
|
||||
margin-left: 2em ;
|
||||
margin-right: 2em }
|
||||
|
||||
div.footer, div.header {
|
||||
clear: both;
|
||||
font-size: smaller }
|
||||
|
||||
div.line-block {
|
||||
display: block ;
|
||||
margin-top: 1em ;
|
||||
margin-bottom: 1em }
|
||||
|
||||
div.line-block div.line-block {
|
||||
margin-top: 0 ;
|
||||
margin-bottom: 0 ;
|
||||
margin-left: 1.5em }
|
||||
|
||||
div.sidebar {
|
||||
margin-left: 1em ;
|
||||
border: medium outset ;
|
||||
padding: 1em ;
|
||||
background-color: #ffffee ;
|
||||
width: 40% ;
|
||||
float: right ;
|
||||
clear: right }
|
||||
|
||||
div.sidebar p.rubric {
|
||||
font-family: sans-serif ;
|
||||
font-size: medium }
|
||||
|
||||
div.system-messages {
|
||||
margin: 5em }
|
||||
|
||||
div.system-messages h1 {
|
||||
color: red }
|
||||
|
||||
div.system-message {
|
||||
border: medium outset ;
|
||||
padding: 1em }
|
||||
|
||||
div.system-message p.system-message-title {
|
||||
color: red ;
|
||||
font-weight: bold }
|
||||
|
||||
div.topic {
|
||||
margin: 2em }
|
||||
|
||||
h1.section-subtitle, h2.section-subtitle, h3.section-subtitle,
|
||||
h4.section-subtitle, h5.section-subtitle, h6.section-subtitle {
|
||||
margin-top: 0.4em }
|
||||
|
||||
h1.title {
|
||||
text-align: center }
|
||||
|
||||
h2.subtitle {
|
||||
text-align: center }
|
||||
|
||||
hr.docutils {
|
||||
width: 75% }
|
||||
|
||||
img.align-left {
|
||||
clear: left }
|
||||
|
||||
img.align-right {
|
||||
clear: right }
|
||||
|
||||
ol.simple, ul.simple {
|
||||
margin-bottom: 1em }
|
||||
|
||||
ol.arabic {
|
||||
list-style: decimal }
|
||||
|
||||
ol.loweralpha {
|
||||
list-style: lower-alpha }
|
||||
|
||||
ol.upperalpha {
|
||||
list-style: upper-alpha }
|
||||
|
||||
ol.lowerroman {
|
||||
list-style: lower-roman }
|
||||
|
||||
ol.upperroman {
|
||||
list-style: upper-roman }
|
||||
|
||||
p.attribution {
|
||||
text-align: right ;
|
||||
margin-left: 50% }
|
||||
|
||||
p.caption {
|
||||
font-style: italic }
|
||||
|
||||
p.credits {
|
||||
font-style: italic ;
|
||||
font-size: smaller }
|
||||
|
||||
p.label {
|
||||
white-space: nowrap }
|
||||
|
||||
p.rubric {
|
||||
font-weight: bold ;
|
||||
font-size: larger ;
|
||||
color: maroon ;
|
||||
text-align: center }
|
||||
|
||||
p.sidebar-title {
|
||||
font-family: sans-serif ;
|
||||
font-weight: bold ;
|
||||
font-size: larger }
|
||||
|
||||
p.sidebar-subtitle {
|
||||
font-family: sans-serif ;
|
||||
font-weight: bold }
|
||||
|
||||
p.topic-title {
|
||||
font-weight: bold }
|
||||
|
||||
pre.address {
|
||||
margin-bottom: 0 ;
|
||||
margin-top: 0 ;
|
||||
font-family: serif ;
|
||||
font-size: 100% }
|
||||
|
||||
pre.literal-block, pre.doctest-block {
|
||||
margin-left: 2em ;
|
||||
margin-right: 2em ;
|
||||
background-color: #eeeeee }
|
||||
|
||||
span.classifier {
|
||||
font-family: sans-serif ;
|
||||
font-style: oblique }
|
||||
|
||||
span.classifier-delimiter {
|
||||
font-family: sans-serif ;
|
||||
font-weight: bold }
|
||||
|
||||
span.interpreted {
|
||||
font-family: sans-serif }
|
||||
|
||||
span.option {
|
||||
white-space: nowrap }
|
||||
|
||||
span.pre {
|
||||
white-space: pre }
|
||||
|
||||
span.problematic {
|
||||
color: red }
|
||||
|
||||
span.section-subtitle {
|
||||
/* font-size relative to parent (h1..h6 element) */
|
||||
font-size: 80% }
|
||||
|
||||
table.citation {
|
||||
border-left: solid 1px gray;
|
||||
margin-left: 1px }
|
||||
|
||||
table.docinfo {
|
||||
margin: 2em 4em }
|
||||
|
||||
table.docutils {
|
||||
margin-top: 0.5em ;
|
||||
margin-bottom: 0.5em }
|
||||
|
||||
table.footnote {
|
||||
border-left: solid 1px black;
|
||||
margin-left: 1px }
|
||||
|
||||
table.docutils td, table.docutils th,
|
||||
table.docinfo td, table.docinfo th {
|
||||
padding-left: 0.5em ;
|
||||
padding-right: 0.5em ;
|
||||
vertical-align: top }
|
||||
|
||||
table.docutils th.field-name, table.docinfo th.docinfo-name {
|
||||
font-weight: bold ;
|
||||
text-align: left ;
|
||||
white-space: nowrap ;
|
||||
padding-left: 0 }
|
||||
|
||||
h1 tt.docutils, h2 tt.docutils, h3 tt.docutils,
|
||||
h4 tt.docutils, h5 tt.docutils, h6 tt.docutils {
|
||||
font-size: 100% }
|
||||
|
||||
tt.docutils {
|
||||
background-color: #eeeeee }
|
||||
|
||||
ul.auto-toc {
|
||||
list-style-type: none }
|
||||
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
<div class="document" id="transform-iterator">
|
||||
@ -32,18 +314,24 @@ Railway Operation and Construction</a></td></tr>
|
||||
<td>Copyright David Abrahams, Jeremy Siek, and Thomas Witt 2003.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The transform iterator adapts an iterator by modifying the
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
The transform iterator adapts an iterator by modifying the
|
||||
<tt class="docutils literal"><span class="pre">operator*</span></tt> to apply a function object to the result of
|
||||
dereferencing the iterator and returning the result.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#transform-iterator-synopsis" id="id2" name="id2"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt> synopsis</a></li>
|
||||
<li><a class="reference" href="#transform-iterator-requirements" id="id3" name="id3"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt> requirements</a></li>
|
||||
@ -52,13 +340,16 @@ dereferencing the iterator and returning the result.</td>
|
||||
<li><a class="reference" href="#example" id="id6" name="id6">Example</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="transform-iterator-synopsis">
|
||||
<h1><a class="toc-backref" href="#id2" name="transform-iterator-synopsis"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt> synopsis</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id2" id="transform-iterator-synopsis" name="transform-iterator-synopsis"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt> synopsis</a></h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<!-- Version 1.3 of this document was accepted for TR1 -->
|
||||
<pre class="literal-block">
|
||||
template <class UnaryFunction,
|
||||
class Iterator,
|
||||
class Reference = use_default,
|
||||
class Iterator,
|
||||
class Reference = use_default,
|
||||
class Value = use_default>
|
||||
class transform_iterator
|
||||
{
|
||||
@ -105,8 +396,8 @@ convertible to <tt class="docutils literal"><span class="pre">forward_iterator_t
|
||||
model Readable Lvalue Iterator then <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is
|
||||
convertible to <tt class="docutils literal"><span class="pre">input_iterator_tag</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="transform-iterator-requirements">
|
||||
<h1><a class="toc-backref" href="#id3" name="transform-iterator-requirements"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt> requirements</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id3" id="transform-iterator-requirements" name="transform-iterator-requirements"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt> requirements</a></h1>
|
||||
<p>The type <tt class="docutils literal"><span class="pre">UnaryFunction</span></tt> must be Assignable, Copy Constructible, and
|
||||
the expression <tt class="docutils literal"><span class="pre">f(*i)</span></tt> must be valid where <tt class="docutils literal"><span class="pre">f</span></tt> is an object of
|
||||
type <tt class="docutils literal"><span class="pre">UnaryFunction</span></tt>, <tt class="docutils literal"><span class="pre">i</span></tt> is an object of type <tt class="docutils literal"><span class="pre">Iterator</span></tt>, and
|
||||
@ -114,8 +405,8 @@ where the type of <tt class="docutils literal"><span class="pre">f(*i)</span></t
|
||||
<tt class="docutils literal"><span class="pre">result_of<UnaryFunction(iterator_traits<Iterator>::reference)>::type</span></tt>.</p>
|
||||
<p>The argument <tt class="docutils literal"><span class="pre">Iterator</span></tt> shall model Readable Iterator.</p>
|
||||
</div>
|
||||
<div class="section" id="transform-iterator-models">
|
||||
<h1><a class="toc-backref" href="#id4" name="transform-iterator-models"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt> models</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id4" id="transform-iterator-models" name="transform-iterator-models"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt> models</a></h1>
|
||||
<p>The resulting <tt class="docutils literal"><span class="pre">transform_iterator</span></tt> models the most refined of the
|
||||
following that is also modeled by <tt class="docutils literal"><span class="pre">Iterator</span></tt>.</p>
|
||||
<blockquote>
|
||||
@ -136,8 +427,8 @@ the <tt class="docutils literal"><span class="pre">Iterator</span></tt> argument
|
||||
<col width="53%" />
|
||||
</colgroup>
|
||||
<thead valign="bottom">
|
||||
<tr><th>If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models</th>
|
||||
<th>then <tt class="docutils literal"><span class="pre">transform_iterator</span></tt> models</th>
|
||||
<tr><th class="head">If <tt class="docutils literal"><span class="pre">Iterator</span></tt> models</th>
|
||||
<th class="head">then <tt class="docutils literal"><span class="pre">transform_iterator</span></tt> models</th>
|
||||
</tr>
|
||||
</thead>
|
||||
<tbody valign="top">
|
||||
@ -161,8 +452,8 @@ mutable iterator (as defined in the old iterator requirements).</p>
|
||||
<tt class="docutils literal"><span class="pre">transform_iterator<F2,</span> <span class="pre">Y,</span> <span class="pre">R2,</span> <span class="pre">V2></span></tt> if and only if <tt class="docutils literal"><span class="pre">X</span></tt> is
|
||||
interoperable with <tt class="docutils literal"><span class="pre">Y</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="transform-iterator-operations">
|
||||
<h1><a class="toc-backref" href="#id5" name="transform-iterator-operations"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt> operations</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id5" id="transform-iterator-operations" name="transform-iterator-operations"><tt class="docutils literal"><span class="pre">transform_iterator</span></tt> operations</a></h1>
|
||||
<p>In addition to the operations required by the concepts modeled by
|
||||
<tt class="docutils literal"><span class="pre">transform_iterator</span></tt>, <tt class="docutils literal"><span class="pre">transform_iterator</span></tt> provides the following
|
||||
operations.</p>
|
||||
@ -255,6 +546,9 @@ initialized to <tt class="docutils literal"><span class="pre">t.functor()</span>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template <class UnaryFunction, class Iterator>
|
||||
transform_iterator<UnaryFunction, Iterator>
|
||||
@ -283,9 +577,12 @@ default constructed and <tt class="docutils literal"><span class="pre">m_iterato
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
</div>
|
||||
<div class="section" id="example">
|
||||
<h1><a class="toc-backref" href="#id6" name="example">Example</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id6" id="example" name="example">Example</a></h1>
|
||||
<p>This is a simple example of using the transform_iterators class to
|
||||
generate iterators that multiply (or add to) the value returned by
|
||||
dereferencing the iterator. It would be cooler to use lambda library
|
||||
@ -314,17 +611,12 @@ std::cout << std::endl;
|
||||
<p>The output is:</p>
|
||||
<pre class="literal-block">
|
||||
multiplying the array by 2:
|
||||
2 4 6 8 10 12 14 16
|
||||
2 4 6 8 10 12 14 16
|
||||
adding 4 to each element in the array:
|
||||
5 6 7 8 9 10 11 12
|
||||
</pre>
|
||||
<p>The source code for this example can be found <a class="reference" href="../example/transform_iterator_example.cpp">here</a>.</p>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="transform_iterator.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
++++++++++++++++++++
|
||||
Transform Iterator
|
||||
++++++++++++++++++++
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
The transform iterator adapts an iterator by modifying the
|
||||
``operator*`` to apply a function object to the result of
|
||||
dereferencing the iterator and returning the result.
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Example
|
||||
.......
|
||||
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
.. Version 1.3 of this document was accepted for TR1
|
||||
|
||||
::
|
||||
|
||||
@ -3,13 +3,295 @@
|
||||
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
|
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||||
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|
||||
<meta name="generator" content="Docutils 0.4: http://docutils.sourceforge.net/" />
|
||||
<title>Zip Iterator</title>
|
||||
<meta name="author" content="David Abrahams, Thomas Becker" />
|
||||
<meta name="organization" content="Boost Consulting, Zephyr Associates, Inc." />
|
||||
<meta name="date" content="2004-11-01" />
|
||||
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|
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|
||||
|
||||
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|
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|
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|
||||
<body>
|
||||
<div class="document" id="zip-iterator">
|
||||
@ -30,12 +312,18 @@
|
||||
<td>Copyright David Abrahams and Thomas Becker 2003.</td></tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
<col class="field-name" />
|
||||
<col class="field-body" />
|
||||
<tbody valign="top">
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body">The zip iterator provides the ability to parallel-iterate
|
||||
over several controlled sequences simultaneously. A zip
|
||||
<tr class="field"><th class="field-name">abstract:</th><td class="field-body"><!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
The zip iterator provides the ability to parallel-iterate
|
||||
over several controlled sequences simultaneously. A zip
|
||||
iterator is constructed from a tuple of iterators. Moving
|
||||
the zip iterator moves all the iterators in parallel.
|
||||
Dereferencing the zip iterator returns a tuple that contains
|
||||
@ -43,8 +331,8 @@ the results of dereferencing the individual iterators.</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<div class="contents topic" id="table-of-contents">
|
||||
<p class="topic-title first"><a name="table-of-contents">Table of Contents</a></p>
|
||||
<div class="contents topic">
|
||||
<p class="topic-title first"><a id="table-of-contents" name="table-of-contents">Table of Contents</a></p>
|
||||
<ul class="simple">
|
||||
<li><a class="reference" href="#zip-iterator-synopsis" id="id1" name="id1"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt> synopsis</a></li>
|
||||
<li><a class="reference" href="#zip-iterator-requirements" id="id2" name="id2"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt> requirements</a></li>
|
||||
@ -53,12 +341,15 @@ the results of dereferencing the individual iterators.</td>
|
||||
<li><a class="reference" href="#examples" id="id5" name="id5">Examples</a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="section" id="zip-iterator-synopsis">
|
||||
<h1><a class="toc-backref" href="#id1" name="zip-iterator-synopsis"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt> synopsis</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id1" id="zip-iterator-synopsis" name="zip-iterator-synopsis"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt> synopsis</a></h1>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template<typename IteratorTuple>
|
||||
class zip_iterator
|
||||
{
|
||||
{
|
||||
|
||||
public:
|
||||
typedef /* see below */ reference;
|
||||
@ -84,8 +375,8 @@ private:
|
||||
IteratorTuple m_iterator_tuple; // exposition only
|
||||
};
|
||||
|
||||
template<typename IteratorTuple>
|
||||
zip_iterator<IteratorTuple>
|
||||
template<typename IteratorTuple>
|
||||
zip_iterator<IteratorTuple>
|
||||
make_zip_iterator(IteratorTuple t);
|
||||
</pre>
|
||||
<p>The <tt class="docutils literal"><span class="pre">reference</span></tt> member of <tt class="docutils literal"><span class="pre">zip_iterator</span></tt> is the type of the tuple
|
||||
@ -96,22 +387,22 @@ of the first of the iterator types in the <tt class="docutils literal"><span cla
|
||||
<p>The <tt class="docutils literal"><span class="pre">iterator_category</span></tt> member of <tt class="docutils literal"><span class="pre">zip_iterator</span></tt> is convertible to the
|
||||
minimum of the traversal categories of the iterator types in the <tt class="docutils literal"><span class="pre">IteratorTuple</span></tt>
|
||||
argument. For example, if the <tt class="docutils literal"><span class="pre">zip_iterator</span></tt> holds only vector
|
||||
iterators, then <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible to
|
||||
iterators, then <tt class="docutils literal"><span class="pre">iterator_category</span></tt> is convertible to
|
||||
<tt class="docutils literal"><span class="pre">boost::random_access_traversal_tag</span></tt>. If you add a list iterator, then
|
||||
<tt class="docutils literal"><span class="pre">iterator_category</span></tt> will be convertible to <tt class="docutils literal"><span class="pre">boost::bidirectional_traversal_tag</span></tt>,
|
||||
but no longer to <tt class="docutils literal"><span class="pre">boost::random_access_traversal_tag</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="zip-iterator-requirements">
|
||||
<h1><a class="toc-backref" href="#id2" name="zip-iterator-requirements"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt> requirements</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id2" id="zip-iterator-requirements" name="zip-iterator-requirements"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt> requirements</a></h1>
|
||||
<p>All iterator types in the argument <tt class="docutils literal"><span class="pre">IteratorTuple</span></tt> shall model Readable Iterator.</p>
|
||||
</div>
|
||||
<div class="section" id="zip-iterator-models">
|
||||
<h1><a class="toc-backref" href="#id3" name="zip-iterator-models"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt> models</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id3" id="zip-iterator-models" name="zip-iterator-models"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt> models</a></h1>
|
||||
<p>The resulting <tt class="docutils literal"><span class="pre">zip_iterator</span></tt> models Readable Iterator.</p>
|
||||
<p>The fact that the <tt class="docutils literal"><span class="pre">zip_iterator</span></tt> models only Readable Iterator does not
|
||||
<p>The fact that the <tt class="docutils literal"><span class="pre">zip_iterator</span></tt> models only Readable Iterator does not
|
||||
prevent you from modifying the values that the individual iterators point
|
||||
to. The tuple returned by the <tt class="docutils literal"><span class="pre">zip_iterator</span></tt>'s <tt class="docutils literal"><span class="pre">operator*</span></tt> is a tuple
|
||||
constructed from the reference types of the individual iterators, not
|
||||
to. The tuple returned by the <tt class="docutils literal"><span class="pre">zip_iterator</span></tt>'s <tt class="docutils literal"><span class="pre">operator*</span></tt> is a tuple
|
||||
constructed from the reference types of the individual iterators, not
|
||||
their value types. For example, if <tt class="docutils literal"><span class="pre">zip_it</span></tt> is a <tt class="docutils literal"><span class="pre">zip_iterator</span></tt> whose
|
||||
first member iterator is an <tt class="docutils literal"><span class="pre">std::vector<double>::iterator</span></tt>, then the
|
||||
following line will modify the value which the first member iterator of
|
||||
@ -121,14 +412,14 @@ zip_it->get<0>() = 42.0;
|
||||
</pre>
|
||||
<p>Consider the set of standard traversal concepts obtained by taking
|
||||
the most refined standard traversal concept modeled by each individual
|
||||
iterator type in the <tt class="docutils literal"><span class="pre">IteratorTuple</span></tt> argument.The <tt class="docutils literal"><span class="pre">zip_iterator</span></tt>
|
||||
iterator type in the <tt class="docutils literal"><span class="pre">IteratorTuple</span></tt> argument.The <tt class="docutils literal"><span class="pre">zip_iterator</span></tt>
|
||||
models the least refined standard traversal concept in this set.</p>
|
||||
<p><tt class="docutils literal"><span class="pre">zip_iterator<IteratorTuple1></span></tt> is interoperable with
|
||||
<tt class="docutils literal"><span class="pre">zip_iterator<IteratorTuple2></span></tt> if and only if <tt class="docutils literal"><span class="pre">IteratorTuple1</span></tt>
|
||||
is interoperable with <tt class="docutils literal"><span class="pre">IteratorTuple2</span></tt>.</p>
|
||||
</div>
|
||||
<div class="section" id="zip-iterator-operations">
|
||||
<h1><a class="toc-backref" href="#id4" name="zip-iterator-operations"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt> operations</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id4" id="zip-iterator-operations" name="zip-iterator-operations"><tt class="docutils literal"><span class="pre">zip_iterator</span></tt> operations</a></h1>
|
||||
<p>In addition to the operations required by the concepts modeled by
|
||||
<tt class="docutils literal"><span class="pre">zip_iterator</span></tt>, <tt class="docutils literal"><span class="pre">zip_iterator</span></tt> provides the following
|
||||
operations.</p>
|
||||
@ -213,8 +504,8 @@ zip_iterator(
|
||||
</tbody>
|
||||
</table>
|
||||
<pre class="literal-block">
|
||||
template<typename IteratorTuple>
|
||||
zip_iterator<IteratorTuple>
|
||||
template<typename IteratorTuple>
|
||||
zip_iterator<IteratorTuple>
|
||||
make_zip_iterator(IteratorTuple t);
|
||||
</pre>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
@ -226,9 +517,12 @@ initialized to <tt class="docutils literal"><span class="pre">t</span></tt>.</td
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
<pre class="literal-block">
|
||||
template<typename IteratorTuple>
|
||||
zip_iterator<IteratorTuple>
|
||||
template<typename IteratorTuple>
|
||||
zip_iterator<IteratorTuple>
|
||||
make_zip_iterator(IteratorTuple t);
|
||||
</pre>
|
||||
<table class="docutils field-list" frame="void" rules="none">
|
||||
@ -240,14 +534,17 @@ initialized to <tt class="docutils literal"><span class="pre">t</span></tt>.</td
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
|
||||
<!-- Software License, Version 1.0. (See accompanying -->
|
||||
<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
|
||||
</div>
|
||||
<div class="section" id="examples">
|
||||
<h1><a class="toc-backref" href="#id5" name="examples">Examples</a></h1>
|
||||
<div class="section">
|
||||
<h1><a class="toc-backref" href="#id5" id="examples" name="examples">Examples</a></h1>
|
||||
<p>There are two main types of applications of the <tt class="docutils literal"><span class="pre">zip_iterator</span></tt>. The first
|
||||
one concerns runtime efficiency: If one has several controlled sequences
|
||||
of the same length that must be somehow processed, e.g., with the
|
||||
of the same length that must be somehow processed, e.g., with the
|
||||
<tt class="docutils literal"><span class="pre">for_each</span></tt> algorithm, then it is more efficient to perform just
|
||||
one parallel-iteration rather than several individual iterations. For an
|
||||
one parallel-iteration rather than several individual iterations. For an
|
||||
example, assume that <tt class="docutils literal"><span class="pre">vect_of_doubles</span></tt> and <tt class="docutils literal"><span class="pre">vect_of_ints</span></tt>
|
||||
are two vectors of equal length containing doubles and ints, respectively,
|
||||
and consider the following two iterations:</p>
|
||||
@ -274,7 +571,7 @@ std::for_each(
|
||||
</pre>
|
||||
<p>A non-generic implementation of <tt class="docutils literal"><span class="pre">zip_func</span></tt> could look as follows:</p>
|
||||
<pre class="literal-block">
|
||||
struct zip_func :
|
||||
struct zip_func :
|
||||
public std::unary_function<const boost::tuple<const double&, const int&>&, void>
|
||||
{
|
||||
void operator()(const boost::tuple<const double&, const int&>& t) const
|
||||
@ -294,14 +591,14 @@ that parallel-iterates over several controlled sequences and, upon
|
||||
dereferencing, returns the result of applying a functor to the values of the
|
||||
sequences at the respective positions. This can now be achieved by using the
|
||||
<tt class="docutils literal"><span class="pre">zip_iterator</span></tt> in conjunction with the <tt class="docutils literal"><span class="pre">transform_iterator</span></tt>.</p>
|
||||
<p>Suppose, for example, that you have two vectors of doubles, say
|
||||
<p>Suppose, for example, that you have two vectors of doubles, say
|
||||
<tt class="docutils literal"><span class="pre">vect_1</span></tt> and <tt class="docutils literal"><span class="pre">vect_2</span></tt>, and you need to expose to a client
|
||||
a controlled sequence containing the products of the elements of
|
||||
a controlled sequence containing the products of the elements of
|
||||
<tt class="docutils literal"><span class="pre">vect_1</span></tt> and <tt class="docutils literal"><span class="pre">vect_2</span></tt>. Rather than placing these products
|
||||
in a third vector, you can use a combining iterator that calculates the
|
||||
products on the fly. Let us assume that <tt class="docutils literal"><span class="pre">tuple_multiplies</span></tt> is a
|
||||
functor that works like <tt class="docutils literal"><span class="pre">std::multiplies</span></tt>, except that it takes
|
||||
its two arguments packaged in a tuple. Then the two iterators
|
||||
its two arguments packaged in a tuple. Then the two iterators
|
||||
<tt class="docutils literal"><span class="pre">it_begin</span></tt> and <tt class="docutils literal"><span class="pre">it_end</span></tt> defined below delimit a controlled
|
||||
sequence containing the products of the elements of <tt class="docutils literal"><span class="pre">vect_1</span></tt> and
|
||||
<tt class="docutils literal"><span class="pre">vect_2</span></tt>:</p>
|
||||
@ -342,10 +639,5 @@ the_transform_iterator it_end(
|
||||
</pre>
|
||||
</div>
|
||||
</div>
|
||||
<hr class="docutils footer" />
|
||||
<div class="footer">
|
||||
<a class="reference" href="zip_iterator.rst">View document source</a>.
|
||||
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
|
||||
</div>
|
||||
</body>
|
||||
</html>
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
+++++++++++++
|
||||
Zip Iterator
|
||||
+++++++++++++
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
The zip iterator provides the ability to parallel-iterate
|
||||
over several controlled sequences simultaneously. A zip
|
||||
iterator is constructed from a tuple of iterators. Moving
|
||||
|
||||
@ -1,3 +1,7 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
Examples
|
||||
........
|
||||
|
||||
|
||||
@ -1,3 +1,6 @@
|
||||
.. Copyright David Abrahams 2006. Distributed under the Boost
|
||||
.. Software License, Version 1.0. (See accompanying
|
||||
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
||||
::
|
||||
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user