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refs #5127 applying Michael Morin's patch for transform_iterator to trunk

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[SVN r78121]
This commit is contained in:
Jeffrey Lee Hellrung, Jr. 2012-04-22 01:27:49 +00:00
parent 964a29979c
commit ad90dac61d
4 changed files with 16 additions and 10 deletions
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6
doc/transform_iterator.html
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@ -99,7 +99,7 @@ private:
</pre>
<p>If <tt class="docutils literal"><span class="pre">Reference</span></tt> is <tt class="docutils literal"><span class="pre">use_default</span></tt> then the <tt class="docutils literal"><span class="pre">reference</span></tt> member of
<tt class="docutils literal"><span class="pre">transform_iterator</span></tt> is
<tt class="docutils literal"><span class="pre">result_of&lt;UnaryFunction(iterator_traits&lt;Iterator&gt;::reference)&gt;::type</span></tt>.
<tt class="docutils literal"><span class="pre">result_of&lt;const UnaryFunction(iterator_traits&lt;Iterator&gt;::reference)&gt;::type</span></tt>.
Otherwise, <tt class="docutils literal"><span class="pre">reference</span></tt> is <tt class="docutils literal"><span class="pre">Reference</span></tt>.</p>
<p>If <tt class="docutils literal"><span class="pre">Value</span></tt> is <tt class="docutils literal"><span class="pre">use_default</span></tt> then the <tt class="docutils literal"><span class="pre">value_type</span></tt> member is
<tt class="docutils literal"><span class="pre">remove_cv&lt;remove_reference&lt;reference&gt;</span> <span class="pre">&gt;::type</span></tt>. Otherwise,
@ -117,10 +117,10 @@ convertible to <tt class="docutils literal"><span class="pre">input_iterator_tag
<div class="section" id="transform-iterator-requirements">
<h1><a class="toc-backref" href="#id3"><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
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 a const 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
where the type of <tt class="docutils literal"><span class="pre">f(*i)</span></tt> must be
<tt class="docutils literal"><span class="pre">result_of&lt;UnaryFunction(iterator_traits&lt;Iterator&gt;::reference)&gt;::type</span></tt>.</p>
<tt class="docutils literal"><span class="pre">result_of&lt;const UnaryFunction(iterator_traits&lt;Iterator&gt;::reference)&gt;::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">

6
doc/transform_iterator_ref.rst
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@ -41,7 +41,7 @@
If ``Reference`` is ``use_default`` then the ``reference`` member of
``transform_iterator`` is
``result_of<UnaryFunction(iterator_traits<Iterator>::reference)>::type``.
``result_of<const UnaryFunction(iterator_traits<Iterator>::reference)>::type``.
Otherwise, ``reference`` is ``Reference``.
If ``Value`` is ``use_default`` then the ``value_type`` member is
@ -64,10 +64,10 @@ convertible to ``input_iterator_tag``.
...................................
The type ``UnaryFunction`` must be Assignable, Copy Constructible, and
the expression ``f(*i)`` must be valid where ``f`` is an object of
the expression ``f(*i)`` must be valid where ``f`` is a const object of
type ``UnaryFunction``, ``i`` is an object of type ``Iterator``, and
where the type of ``f(*i)`` must be
``result_of<UnaryFunction(iterator_traits<Iterator>::reference)>::type``.
``result_of<const UnaryFunction(iterator_traits<Iterator>::reference)>::type``.
The argument ``Iterator`` shall model Readable Iterator.

2
include/boost/iterator/transform_iterator.hpp
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@ -46,7 +46,7 @@ namespace boost
// the function.
typedef typename ia_dflt_help<
Reference
, result_of<UnaryFunc(typename std::iterator_traits<Iterator>::reference)>
, result_of<const UnaryFunc(typename std::iterator_traits<Iterator>::reference)>
>::type reference;
// To get the default for Value: remove any reference on the

12
test/transform_iterator_test.cpp
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@ -12,6 +12,7 @@
// Moved test of transform iterator into its own file. It to
// to be in iterator_adaptor_test.cpp.
#include <boost/assert.hpp>
#include <boost/config.hpp>
#include <algorithm>
#include <boost/iterator/transform_iterator.hpp>
@ -106,12 +107,17 @@ struct polymorphic_mult_functor
{
//Implement result_of protocol
template <class FArgs> struct result;
template <class F, class T> struct result<F(T )> {typedef T type;};
template <class F, class T> struct result<F(T& )> {typedef T type;};
template <class F, class T> struct result<F(const T&)> {typedef T type;};
template <class F, class T> struct result<const F(T )> {typedef T type;};
template <class F, class T> struct result<const F(T& )> {typedef T type;};
template <class F, class T> struct result<const F(const T&)> {typedef T type;};
template <class F, class T> struct result<F(T )> {typedef void type;};
template <class F, class T> struct result<F(T& )> {typedef void type;};
template <class F, class T> struct result<F(const T&)> {typedef void type;};
template <class T>
T operator()(const T& _arg) const {return _arg*2;}
template <class T>
void operator()(const T& _arg) { BOOST_ASSERT(0); }
};
int