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Return base by const&

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[SVN r21775]
This commit is contained in:
Dave Abrahams
2004-01-15 19:06:25 +00:00
parent 7c784ad112
commit 1e3da4b77f
4 changed files with 18 additions and 23 deletions
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doc/iterator_facade.html
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@ -407,14 +407,6 @@ traversal tags would add no information]</p>
<!-- 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) -->
<p>If <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt> is <tt class="literal"><span class="pre">use_default</span></tt> then
<tt class="literal"><span class="pre">iterator_traversal&lt;Derived&gt;::type</span></tt> is convertible to the most
derived standard traversal tag type to which
<tt class="literal"><span class="pre">iterator_traversal&lt;Iterator&gt;::type</span></tt> is also convertible, and not to
any more-derived traversal tag type. Otherwise
<tt class="literal"><span class="pre">iterator_traversal&lt;Derived&gt;::type</span></tt> is convertible to the most
derived standard traversal tag type to which <tt class="literal"><span class="pre">CategoryOrTraversal</span></tt>
is also convertible, and not to any more-derived traversal tag type.</p>
<p>The <tt class="literal"><span class="pre">enable_if_interoperable</span></tt> template used above is for exposition
purposes. The member operators should be only be in an overload set
provided the derived types <tt class="literal"><span class="pre">Dr1</span></tt> and <tt class="literal"><span class="pre">Dr2</span></tt> are interoperable,