Merge utility documentation.

- Fixed duplicate anchors.
- Add BOOST_EXPLICIT_OPERATOR_BOOL documentation.
- Rebuild some of the utility documentation.


[SVN r86797]
This commit is contained in:
Daniel James 2013-11-23 14:23:45 +00:00
parent 44a98b121b
commit 96da5105ab
5 changed files with 147 additions and 30 deletions

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@ -3,7 +3,7 @@
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</h3></div> </h3></div>
</div></div> </div></div>
<div><p class="copyright">Copyright &#169; 2008 Howard Hinnant</p></div> <div><p class="copyright">Copyright &#169; 2008 Howard Hinnant</p></div>
<div><p class="copyright">Copyright &#169; 2009 -2012 Vicente J. Botet Escriba</p></div> <div><p class="copyright">Copyright &#169; 2009-2012 Vicente
J. Botet Escriba</p></div>
<div><div class="legalnotice"> <div><div class="legalnotice">
<a name="idp13449552"></a><p> <a name="declval.legal"></a><p>
Distributed under the Boost Software License, Version 1.0. (See accompanying Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p> </p>
@ -43,7 +44,7 @@
</div> </div>
<div class="toc"> <div class="toc">
<p><b>Table of Contents</b></p> <p><b>Table of Contents</b></p>
<dl> <dl class="toc">
<dt><span class="section"><a href="declval.html#declval.overview">Overview</a></span></dt> <dt><span class="section"><a href="declval.html#declval.overview">Overview</a></span></dt>
<dt><span class="section"><a href="declval.html#declval.reference">Reference </a></span></dt> <dt><span class="section"><a href="declval.html#declval.reference">Reference </a></span></dt>
<dt><span class="section"><a href="declval.html#declval.history">History</a></span></dt> <dt><span class="section"><a href="declval.html#declval.history">History</a></span></dt>
@ -66,13 +67,13 @@
in a non-using context, e.g. given the declaration in a non-using context, e.g. given the declaration
</p> </p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span> <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="identifier">T</span><span class="special">&amp;&amp;</span> <span class="identifier">declval</span><span class="special">();</span> <span class="comment">// not used <span class="identifier">T</span><span class="special">&amp;&amp;</span> <span class="identifier">declval</span><span class="special">();</span> <span class="comment">// not used</span>
</span></pre> </pre>
<p> <p>
as part of the function template declaration as part of the function template declaration
</p> </p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">To</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">From</span><span class="special">&gt;</span> <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">To</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">From</span><span class="special">&gt;</span>
<span class="identifier">decltype</span><span class="special">(</span><span class="keyword">static_cast</span><span class="special">&lt;</span><span class="identifier">To</span><span class="special">&gt;(</span><span class="identifier">declval</span><span class="special">&lt;</span><span class="identifier">From</span><span class="special">&gt;()))</span> <span class="identifier">convert</span><span class="special">(</span><span class="identifier">From</span><span class="special">&amp;&amp;);</span> <span class="keyword">decltype</span><span class="special">(</span><span class="keyword">static_cast</span><span class="special">&lt;</span><span class="identifier">To</span><span class="special">&gt;(</span><span class="identifier">declval</span><span class="special">&lt;</span><span class="identifier">From</span><span class="special">&gt;()))</span> <span class="identifier">convert</span><span class="special">(</span><span class="identifier">From</span><span class="special">&amp;&amp;);</span>
</pre> </pre>
<p> <p>
or as part of a class template definition or as part of a class template definition
@ -80,9 +81,9 @@
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span><span class="special">&gt;</span> <span class="keyword">class</span> <span class="identifier">result_of</span><span class="special">;</span> <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span><span class="special">&gt;</span> <span class="keyword">class</span> <span class="identifier">result_of</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Fn</span><span class="special">,</span> <span class="keyword">class</span><span class="special">...</span> <span class="identifier">ArgTypes</span><span class="special">&gt;</span> <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">Fn</span><span class="special">,</span> <span class="keyword">class</span><span class="special">...</span> <span class="identifier">ArgTypes</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">result_of</span><span class="special">&lt;</span><span class="identifier">Fn</span><span class="special">(</span><span class="identifier">ArgTypes</span><span class="special">...)&gt;</span> <span class="keyword">struct</span> <span class="identifier">result_of</span><span class="special">&lt;</span><span class="identifier">Fn</span><span class="special">(</span><span class="identifier">ArgTypes</span><span class="special">...)&gt;</span>
<span class="special">{</span> <span class="special">{</span>
<span class="keyword">typedef</span> <span class="identifier">decltype</span><span class="special">(</span><span class="identifier">declval</span><span class="special">&lt;</span><span class="identifier">Fn</span><span class="special">&gt;()(</span><span class="identifier">declval</span><span class="special">&lt;</span><span class="identifier">ArgTypes</span><span class="special">&gt;()...))</span> <span class="identifier">type</span><span class="special">;</span> <span class="keyword">typedef</span> <span class="keyword">decltype</span><span class="special">(</span><span class="identifier">declval</span><span class="special">&lt;</span><span class="identifier">Fn</span><span class="special">&gt;()(</span><span class="identifier">declval</span><span class="special">&lt;</span><span class="identifier">ArgTypes</span><span class="special">&gt;()...))</span> <span class="identifier">type</span><span class="special">;</span>
<span class="special">};</span> <span class="special">};</span>
</pre> </pre>
<p> <p>
@ -94,8 +95,8 @@
to to
</p> </p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span> <pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">declval</span><span class="special">();</span> <span class="comment">// not used <span class="keyword">typename</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">declval</span><span class="special">();</span> <span class="comment">// not used</span>
</span></pre> </pre>
<p> <p>
which ensures that we can also use cv void as template parameter. The careful which ensures that we can also use cv void as template parameter. The careful
reader might have noticed that <code class="computeroutput"><span class="identifier">declval</span><span class="special">()</span></code> already exists under the name create() as reader might have noticed that <code class="computeroutput"><span class="identifier">declval</span><span class="special">()</span></code> already exists under the name create() as
@ -119,10 +120,10 @@
<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span> <pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span> <span class="special">{</span>
<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span> <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">typename</span> <span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">declval</span><span class="special">()</span> <span class="identifier">noexcept</span><span class="special">;</span> <span class="comment">// as unevaluated operand <span class="keyword">typename</span> <span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">declval</span><span class="special">()</span> <span class="keyword">noexcept</span><span class="special">;</span> <span class="comment">// as unevaluated operand</span>
</span>
<span class="special">}</span> <span class="comment">// namespace boost <span class="special">}</span> <span class="comment">// namespace boost</span>
</span></pre> </pre>
<p> <p>
The library provides the function template declval to simplify the definition The library provides the function template declval to simplify the definition
of expressions which occur as unevaluated operands. of expressions which occur as unevaluated operands.
@ -142,7 +143,7 @@
<span class="bold"><strong>Example:</strong></span> <span class="bold"><strong>Example:</strong></span>
</p> </p>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">To</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">From</span><span class="special">&gt;</span> <pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">To</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">From</span><span class="special">&gt;</span>
<span class="identifier">decltype</span><span class="special">(</span><span class="keyword">static_cast</span><span class="special">&lt;</span><span class="identifier">To</span><span class="special">&gt;(</span><span class="identifier">declval</span><span class="special">&lt;</span><span class="identifier">From</span><span class="special">&gt;()))</span> <span class="identifier">convert</span><span class="special">(</span><span class="identifier">From</span><span class="special">&amp;&amp;);</span> <span class="keyword">decltype</span><span class="special">(</span><span class="keyword">static_cast</span><span class="special">&lt;</span><span class="identifier">To</span><span class="special">&gt;(</span><span class="identifier">declval</span><span class="special">&lt;</span><span class="identifier">From</span><span class="special">&gt;()))</span> <span class="identifier">convert</span><span class="special">(</span><span class="identifier">From</span><span class="special">&amp;&amp;);</span>
</pre> </pre>
<p> <p>
Declares a function template convert which only participates in overloading Declares a function template convert which only participates in overloading
@ -153,21 +154,22 @@
<div class="titlepage"><div><div><h2 class="title" style="clear: both"> <div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="declval.history"></a><a class="link" href="declval.html#declval.history" title="History">History</a> <a name="declval.history"></a><a class="link" href="declval.html#declval.history" title="History">History</a>
</h2></div></div></div> </h2></div></div></div>
<a name="declval.history.boost_1_50"></a><h4> <h4>
<a name="idp13553216"></a> <a name="declval.history.h0"></a>
<a class="link" href="declval.html#declval.history.boost_1_50">boost 1.50</a> <span class="phrase"><a name="declval.history.boost_1_50"></a></span><a class="link" href="declval.html#declval.history.boost_1_50">boost
1.50</a>
</h4> </h4>
<p> <p>
Fixes: Fixes:
</p> </p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"> <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
<a href="http://svn.boost.org/trac/boost/ticket/6570" target="_top">#6570</a> <a href="http://svn.boost.org/trac/boost/ticket/6570" target="_top">#6570</a>
Adding noexcept to boost::declval. Adding noexcept to boost::declval.
</li></ul></div> </li></ul></div>
</div> </div>
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<td align="left"><p><small>Last revised: May 28, 2012 at 18:59:06 GMT</small></p></td> <td align="left"><p><small>Last revised: November 23, 2013 at 14:11:12 GMT</small></p></td>
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<a name="boost_explicit_operator_bool_and_boost_constexpr_explicit_operator_bool"></a>BOOST_EXPLICIT_OPERATOR_BOOL and BOOST_CONSTEXPR_EXPLICIT_OPERATOR_BOOL</h2></div>
<div><div class="authorgroup"><div class="author"><h3 class="author">
<span class="firstname">Andrey</span> <span class="surname">Semashev</span>
</h3></div></div></div>
<div><p class="copyright">Copyright &#169; 2013 Andrey Semashev</p></div>
<div><div class="legalnotice">
<a name="boost_explicit_operator_bool_and_boost_constexpr_explicit_operator_bool.legal"></a><p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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<div class="toc">
<p><b>Table of Contents</b></p>
<dl class="toc">
<dt><span class="section"><a href="explicit_operator_bool.html#boost_explicit_operator_bool_and_boost_constexpr_explicit_operator_bool.overview">Overview</a></span></dt>
<dt><span class="section"><a href="explicit_operator_bool.html#boost_explicit_operator_bool_and_boost_constexpr_explicit_operator_bool.examples">Examples</a></span></dt>
<dt><span class="section"><a href="explicit_operator_bool.html#boost_explicit_operator_bool_and_boost_constexpr_explicit_operator_bool.history">History</a></span></dt>
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<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="boost_explicit_operator_bool_and_boost_constexpr_explicit_operator_bool.overview"></a><a class="link" href="explicit_operator_bool.html#boost_explicit_operator_bool_and_boost_constexpr_explicit_operator_bool.overview" title="Overview">Overview</a>
</h2></div></div></div>
<p>
<code class="computeroutput"><span class="identifier">BOOST_EXPLICIT_OPERATOR_BOOL</span><span class="special">()</span></code> and <code class="computeroutput"><span class="identifier">BOOST_CONSTEXPR_EXPLICIT_OPERATOR_BOOL</span><span class="special">()</span></code> are compatibility helper macros that expand
to an explicit conversion operator to <code class="computeroutput"><span class="keyword">bool</span></code>.
For compilers not supporting explicit conversion operators introduced in C++11
the macros expand to a conversion operator that implements the <a href="http://en.wikibooks.org/wiki/More_C%2B%2B_Idioms/Safe_bool" target="_top">safe
bool idiom</a>. In case if the compiler is not able to handle safe bool
idiom well the macros expand to a regular conversion operator to <code class="computeroutput"><span class="keyword">bool</span></code>.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="boost_explicit_operator_bool_and_boost_constexpr_explicit_operator_bool.examples"></a><a class="link" href="explicit_operator_bool.html#boost_explicit_operator_bool_and_boost_constexpr_explicit_operator_bool.examples" title="Examples">Examples</a>
</h2></div></div></div>
<p>
Both macros are intended to be placed within a user's class definition. The
generated conversion operators will be implemented in terms of <code class="computeroutput"><span class="keyword">operator</span><span class="special">!()</span></code>
that should be defined by user in this class. In case of <code class="computeroutput"><span class="identifier">BOOST_CONSTEXPR_EXPLICIT_OPERATOR_BOOL</span><span class="special">()</span></code> the generated conversion operator will be
declared <code class="computeroutput"><span class="keyword">constexpr</span></code> which requires
the corresponding <code class="computeroutput"><span class="keyword">operator</span><span class="special">!()</span></code>
to also be <code class="computeroutput"><span class="keyword">constexpr</span></code>.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">T</span> <span class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">my_ptr</span>
<span class="special">{</span>
<span class="identifier">T</span><span class="special">*</span> <span class="identifier">m_p</span><span class="special">;</span>
<span class="keyword">public</span><span class="special">:</span>
<span class="identifier">BOOST_EXPLICIT_OPERATOR_BOOL</span><span class="special">()</span>
<span class="keyword">bool</span> <span class="keyword">operator</span><span class="special">!()</span> <span class="keyword">const</span>
<span class="special">{</span>
<span class="keyword">return</span> <span class="special">!</span><span class="identifier">m_p</span><span class="special">;</span>
<span class="special">}</span>
<span class="special">};</span>
</pre>
<p>
Now <code class="computeroutput"><span class="identifier">my_ptr</span></code> can be used in conditional
expressions, similarly to a regular pointer:
</p>
<pre class="programlisting"><span class="identifier">my_ptr</span><span class="special">&lt;</span> <span class="keyword">int</span> <span class="special">&gt;</span> <span class="identifier">p</span><span class="special">;</span>
<span class="keyword">if</span> <span class="special">(</span><span class="identifier">p</span><span class="special">)</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"true"</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
</pre>
</div>
<div class="section">
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1.55</a>
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<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
The macro was extracted from Boost.Log.
</li></ul></div>
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<dt><span class="section"><a href="string_ref.html#string_ref.overview">Overview</a></span></dt> <dt><span class="section"><a href="string_ref.html#string_ref.overview">Overview</a></span></dt>
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@ -262,16 +262,16 @@
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<h4> <h4>
<a name="string_ref.history.h0"></a> <a name="string_ref.history.h0"></a>
<span><a name="string_ref.history.boost_1_53"></a></span><a class="link" href="string_ref.html#string_ref.history.boost_1_53">boost <span class="phrase"><a name="string_ref.history.boost_1_53"></a></span><a class="link" href="string_ref.html#string_ref.history.boost_1_53">boost
1.53</a> 1.53</a>
</h4> </h4>
<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"> <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem">
Introduced Introduced
</li></ul></div> </li></ul></div>
</div> </div>
</div> </div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"><p><small>Last revised: October 27, 2013 at 21:01:34 GMT</small></p></td> <td align="left"><p><small>Last revised: November 23, 2013 at 14:12:56 GMT</small></p></td>
<td align="right"><div class="copyright-footer"></div></td> <td align="right"><div class="copyright-footer"></div></td>
</tr></table> </tr></table>
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@ -201,7 +201,7 @@ extra template parameter.
<!--TOC subsection Enabling function templates in C++0x--> <!--TOC subsection Enabling function templates in C++0x-->
<A NAME="sec:enable_if_0x"></A> <A NAME="sec:enable_if_0x"></A>
<H3><A NAME="htoc7">3.1</A>&nbsp;&nbsp;Enabling function templates in C++0x</H3><!--SEC END --> <H3><A NAME="htoc6">3.1</A>&nbsp;&nbsp;Enabling function templates in C++0x</H3><!--SEC END -->
In a compiler which supports C++0x default arguments for function template parameters, you can In a compiler which supports C++0x default arguments for function template parameters, you can
enable and disable function templates by adding an additional template parameter. This approach enable and disable function templates by adding an additional template parameter. This approach
@ -416,7 +416,7 @@ subscript operators).
</UL> </UL>
<!--TOC section Acknowledgements--> <!--TOC section Acknowledgements-->
<H2><A NAME="htoc10">4</A>&nbsp;&nbsp;Acknowledgements</H2><!--SEC END --> <H2><A NAME="htoc11">4</A>&nbsp;&nbsp;Acknowledgements</H2><!--SEC END -->
We are grateful to Howard Hinnant, Jason Shirk, Paul Mensonides, and Richard We are grateful to Howard Hinnant, Jason Shirk, Paul Mensonides, and Richard
Smith whose findings have influenced the library.<BR> Smith whose findings have influenced the library.<BR>

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@ -35,8 +35,8 @@
<a href="throw_exception.html">throw_exception</a><br> <a href="throw_exception.html">throw_exception</a><br>
<a href="utility.htm">utility</a><br> <a href="utility.htm">utility</a><br>
<a href="doc/html/string_ref.html">string_ref</a><br> <a href="doc/html/string_ref.html">string_ref</a><br>
<a href="value_init.htm">value_init</a> <a href="value_init.htm">value_init</a><br>
<a href="doc/html/explicit_operator_bool.html">BOOST_EXPLICIT_OPERATOR_BOOL and BOOST_CONSTEXPR_EXPLICIT_OPERATOR_BOOL</a><br> <a href="doc/html/explicit_operator_bool.html">BOOST_EXPLICIT_OPERATOR_BOOL and BOOST_CONSTEXPR_EXPLICIT_OPERATOR_BOOL</a>
</p> </p>
</blockquote> </blockquote>
<hr> <hr>