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more work on the specification of iterator_category
[SVN r21662]
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@ -116,7 +116,7 @@ else
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typedef Reference reference;
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if (Value is use_default) then
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typedef ?? pointer;
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typedef iterator_traits<V>::value_type* pointer;
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else
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typedef Value* pointer;
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@ -125,9 +125,21 @@ if (Difference is use_default)
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else
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typedef Difference difference_type;
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</pre>
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<p>The member <tt class="literal"><span class="pre">iterator_category</span></tt> is a type that satisfies the
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requirements of the concepts modeled by the <tt class="literal"><span class="pre">indirect_iterator</span></tt> as
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specified in the models section.</p>
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<p>If <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt> is not <tt class="literal"><span class="pre">use_default</span></tt> then
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<tt class="literal"><span class="pre">iterator_category</span></tt> is <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt>. Otherwise
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<tt class="literal"><span class="pre">iterator_category</span></tt> is a type convertible to the tag determined by
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the following algorithm. Let <tt class="literal"><span class="pre">C</span></tt> be <tt class="literal"><span class="pre">traveral_category<Iterator>::type</span></tt>.</p>
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<pre class="literal-block">
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if (reference is a reference to value_type) then
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if (C is convertible to random_access_traversal_tag) then
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random_access_iterator_tag
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else if (C is convertible to bidirectional_traversal_tag) then
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bidirectional_iterator_tag
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else
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forward_iterator_tag
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else
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input_iterator_tag
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</pre>
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</div>
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<div class="section" id="indirect-iterator-requirements">
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<h1><a class="toc-backref" href="#id3" name="indirect-iterator-requirements"><tt class="literal"><span class="pre">indirect_iterator</span></tt> requirements</a></h1>
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@ -135,7 +147,7 @@ specified in the models section.</p>
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Iterator. The <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt> argument shall be one of the
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standard iterator tags or <tt class="literal"><span class="pre">use_default</span></tt>. If <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt>
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is an iterator tag, the template parameter <tt class="literal"><span class="pre">Iterator</span></tt> argument shall
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meet the traversal requirements corresponding to the iterator tag.</p>
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meet the requirements corresponding to the iterator tag.</p>
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<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 type
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<tt class="literal"><span class="pre">iterator_traits<Iterator>::value_type</span></tt>, must be a valid expression
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and must be convertible to <tt class="literal"><span class="pre">indirect_iterator::reference</span></tt>. Also
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@ -315,7 +327,7 @@ a,b,c,d,e,f,g,
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<hr class="footer"/>
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<div class="footer">
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<a class="reference" href="indirect_iterator.rst">View document source</a>.
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Generated on: 2004-01-13 02:54 UTC.
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Generated on: 2004-01-13 05:55 UTC.
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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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</div>
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</body>
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