forked from boostorg/range
[range] disambiguate const / non-const overloads for Intel compilers and older GCC.
[SVN r63998]
This commit is contained in:
Neil Groves
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</div>
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<div class="section" title="Introduction and motivation">
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<div class="section">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="range.reference.adaptors.introduction"></a><a class="link" href="introduction.html" title="Introduction and motivation"> Introduction
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and motivation</a>
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@ -122,7 +122,7 @@
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situations, you will really appreciate the succinctness of <code class="computeroutput"><span class="keyword">operator</span><span class="special">|()</span></code>.
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</p>
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<a name="range.reference.adaptors.introduction.composition_of_adaptors"></a><h6>
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<a name="id3065833"></a>
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<a name="id3044351"></a>
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<a class="link" href="introduction.html#range.reference.adaptors.introduction.composition_of_adaptors">Composition
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of Adaptors</a>
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</h6>
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@ -132,8 +132,14 @@
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to algorithms. For example, consider these Range algorithms:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc">
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<li class="listitem"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">copy</span><span class="special">(</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">out</span> <span class="special">)</span></code></li>
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<li class="listitem"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">count</span><span class="special">(</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">pred</span> <span class="special">)</span></code></li>
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<li class="listitem">
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<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">copy</span><span class="special">(</span> <span class="identifier">rng</span><span class="special">,</span> <span class="identifier">out</span> <span class="special">)</span></code>
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</li>
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<li class="listitem">
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<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">count</span><span class="special">(</span>
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<span class="identifier">rng</span><span class="special">,</span>
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<span class="identifier">pred</span> <span class="special">)</span></code>
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</li>
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</ul></div>
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<p>
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What should we do if we only want to copy an element <code class="computeroutput"><span class="identifier">a</span></code>
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The naive answer would be to use these algorithms:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc">
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<li class="listitem"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">copy_if</span><span class="special">(</span>
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<span class="identifier">rng</span><span class="special">,</span>
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<span class="identifier">pred</span><span class="special">,</span>
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<span class="identifier">out</span> <span class="special">)</span></code></li>
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<li class="listitem"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">count_if</span><span class="special">(</span>
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<span class="identifier">rng</span><span class="special">,</span>
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<span class="identifier">pred</span> <span class="special">)</span></code></li>
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<li class="listitem">
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<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">copy_if</span><span class="special">(</span>
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<span class="identifier">rng</span><span class="special">,</span>
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<span class="identifier">pred</span><span class="special">,</span>
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<span class="identifier">out</span> <span class="special">)</span></code>
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</li>
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<li class="listitem">
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<code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">count_if</span><span class="special">(</span>
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<span class="identifier">rng</span><span class="special">,</span>
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<span class="identifier">pred</span> <span class="special">)</span></code>
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</li>
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</ul></div>
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<p>
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These algorithms are only defined to maintain a one to one relationship
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is the design solution to this problem.
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</p>
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<a name="range.reference.adaptors.introduction.range_adaptor_alternative_to_copy_if_algorithm"></a><h6>
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<a name="id3066116"></a>
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<a name="id3044650"></a>
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<a class="link" href="introduction.html#range.reference.adaptors.introduction.range_adaptor_alternative_to_copy_if_algorithm">Range
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Adaptor alternative to copy_if algorithm</a>
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</h6>
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<p>
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</p>
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<a name="range.reference.adaptors.introduction.range_adaptor_alternative_to_count_if_algorithm"></a><h6>
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<a name="id3066285"></a>
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<a name="id3044820"></a>
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<a class="link" href="introduction.html#range.reference.adaptors.introduction.range_adaptor_alternative_to_count_if_algorithm">Range
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Adaptor alternative to count_if algorithm</a>
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</h6>
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@ -268,7 +278,7 @@
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</tr></table>
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