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<div class="section" lang="en">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="fusion.view.iterator_range"></a><a href="iterator_range.html" title="iterator_range">iterator_range</a></h3></div></div></div>
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<a name="fusion.view.iterator_range.description"></a><h4>
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<a name="id565688"></a>
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<a href="iterator_range.html#fusion.view.iterator_range.description">Description</a>
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</h4>
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<p>
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<tt class="computeroutput"><span class="identifier">iterator_range</span></tt> presents a
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sub-range of its underlying sequence delimited by a pair of iterators.
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</p>
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<a name="fusion.view.iterator_range.header"></a><h4>
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<a name="id565729"></a>
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<a href="iterator_range.html#fusion.view.iterator_range.header">Header</a>
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</h4>
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<pre class="programlisting">
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<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">view</span><span class="special">/</span><span class="identifier">iterator_range</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">iterator_range</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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</pre>
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<a name="fusion.view.iterator_range.synopsis"></a><h4>
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<a name="id565887"></a>
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<a href="iterator_range.html#fusion.view.iterator_range.synopsis">Synopsis</a>
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</h4>
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<pre class="programlisting">
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">First</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">Last</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">iterator_range</span><span class="special">;</span>
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</pre>
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<a name="fusion.view.iterator_range.template_parameters"></a><h4>
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<a name="id565986"></a>
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<a href="iterator_range.html#fusion.view.iterator_range.template_parameters">Template parameters</a>
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</h4>
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<div class="informaltable"><table class="table">
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Parameter
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Description
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Default
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</p>
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</th>
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</tr></thead>
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<p>
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<tt class="computeroutput"><span class="identifier">First</span></tt>
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</p>
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</td>
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<td>
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<p>
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A fusion <a href="../iterator.html" title="Iterator">Iterator</a>
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</p>
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</td>
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</p>
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<p>
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<tt class="computeroutput"><span class="identifier">Last</span></tt>
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</p>
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</td>
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<td>
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<p>
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A fusion <a href="../iterator.html" title="Iterator">Iterator</a>
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</p>
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</td>
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</p>
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</tr>
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</tbody>
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</table></div>
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<a name="fusion.view.iterator_range.model_of"></a><h4>
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<a name="id566140"></a>
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<a href="iterator_range.html#fusion.view.iterator_range.model_of">Model of</a>
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</h4>
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<div class="itemizedlist"><ul type="disc"><li>
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<a href="../sequence/concepts/forward_sequence.html" title="Forward
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Sequence">Forward Sequence</a>,
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<a href="../sequence/concepts/bidirectional_sequence.html" title="Bidirectional
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Sequence">Bidirectional
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Sequence</a> or <a href="../sequence/concepts/random_access_sequence.html" title="Random
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Access Sequence">Random
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Access Sequence</a> depending on the traversal characteristics (see
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<a href="../sequence/concepts.html#fusion.sequence.concepts.traversal">Sequence Traversal Concept</a>)
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of its underlying sequence.
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</li></ul></div>
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<div class="variablelist">
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<p class="title"><b>Notation</b></p>
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<dl>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">IR</span></tt></span></dt>
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<dd><p>
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An <tt class="computeroutput"><span class="identifier">iterator_range</span></tt> type
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">f</span></tt></span></dt>
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<dd><p>
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An instance of <tt class="computeroutput"><span class="identifier">First</span></tt>
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">l</span></tt></span></dt>
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<dd><p>
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An instance of <tt class="computeroutput"><span class="identifier">Last</span></tt>
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</p></dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">ir</span></tt>,
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<tt class="computeroutput"><span class="identifier">ir2</span></tt></span></dt>
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<dd><p>
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Instances of <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>
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</p></dd>
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</dl>
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</div>
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<a name="fusion.view.iterator_range.expression_semantics"></a><h4>
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<a name="id566370"></a>
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<a href="iterator_range.html#fusion.view.iterator_range.expression_semantics">Expression
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Semantics</a>
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</h4>
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<p>
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Semantics of an expression is defined only where it differs from, or is not
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defined in <a href="../sequence/concepts/forward_sequence.html" title="Forward
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Sequence">Forward
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Sequence</a>.
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</p>
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<div class="informaltable"><table class="table">
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<colgroup>
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<thead><tr>
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Expression
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</p>
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</th>
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<p>
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Semantics
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</p>
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</th>
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</tr></thead>
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<p>
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<tt class="computeroutput"><span class="identifier">IR</span><span class="special">(</span><span class="identifier">f</span><span class="special">,</span> <span class="identifier">l</span><span class="special">)</span></tt>
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</p>
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</td>
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<td>
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<p>
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Creates an <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>
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given iterators, <tt class="computeroutput"><span class="identifier">f</span></tt>
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and <tt class="computeroutput"><span class="identifier">l</span></tt>.
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</p>
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</td>
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</tr>
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<p>
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<tt class="computeroutput"><span class="identifier">IR</span><span class="special">(</span><span class="identifier">ir</span><span class="special">)</span></tt>
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</p>
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</td>
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<td>
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<p>
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Copy constructs an <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>
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from another <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>,
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<tt class="computeroutput"><span class="identifier">ir</span></tt>.
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</p>
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<p>
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<tt class="computeroutput"><span class="identifier">ir</span> <span class="special">=</span>
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<span class="identifier">ir2</span></tt>
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</p>
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</td>
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<td>
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<p>
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Assigns to a <tt class="computeroutput"><span class="identifier">iterator_range</span></tt>,
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<tt class="computeroutput"><span class="identifier">ir</span></tt>, from another
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<tt class="computeroutput"><span class="identifier">iterator_range</span></tt>,
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<tt class="computeroutput"><span class="identifier">ir2</span></tt>.
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</p>
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</tbody>
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</table></div>
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<a name="fusion.view.iterator_range.example"></a><h4>
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<a name="id566706"></a>
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2008-07-08 02:43:21 +00:00
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<a href="iterator_range.html#fusion.view.iterator_range.example">Example</a>
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</h4>
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2007-11-25 18:38:02 +00:00
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<pre class="programlisting">
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<span class="keyword">char</span> <span class="keyword">const</span><span class="special">*</span> <span class="identifier">s</span> <span class="special">=</span> <span class="string">"Ruby"</span><span class="special">;</span>
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2008-07-08 02:43:21 +00:00
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<span class="keyword">typedef</span> <a href="../container/vector.html" title="vector"><tt class="computeroutput"><span class="identifier">vector</span></tt></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span><span class="special">,</span> <span class="keyword">double</span><span class="special">,</span> <span class="keyword">char</span> <span class="keyword">const</span><span class="special">*></span> <span class="identifier">vector_type</span><span class="special">;</span>
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2007-11-25 18:38:02 +00:00
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<span class="identifier">vector_type</span> <span class="identifier">vec</span><span class="special">(</span><span class="number">1</span><span class="special">,</span> <span class="char">'x'</span><span class="special">,</span> <span class="number">3.3</span><span class="special">,</span> <span class="identifier">s</span><span class="special">);</span>
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2008-07-08 02:43:21 +00:00
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<span class="keyword">typedef</span> <a href="../sequence/intrinsic/metafunctions/begin.html" title="begin"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">begin</span></tt></a><span class="special"><</span><span class="identifier">vector_type</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">A</span><span class="special">;</span>
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<span class="keyword">typedef</span> <a href="../sequence/intrinsic/metafunctions/end.html" title="end"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">end</span></tt></a><span class="special"><</span><span class="identifier">vector_type</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">B</span><span class="special">;</span>
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<span class="keyword">typedef</span> <a href="../iterator/metafunctions/next.html" title="next"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">next</span></tt></a><span class="special"><</span><span class="identifier">A</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">C</span><span class="special">;</span>
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<span class="keyword">typedef</span> <a href="../iterator/metafunctions/prior.html" title="prior"><tt class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">prior</span></tt></a><span class="special"><</span><span class="identifier">B</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">D</span><span class="special">;</span>
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2007-11-25 18:38:02 +00:00
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<span class="identifier">C</span> <span class="identifier">c</span><span class="special">(</span><span class="identifier">vec</span><span class="special">);</span>
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<span class="identifier">D</span> <span class="identifier">d</span><span class="special">(</span><span class="identifier">vec</span><span class="special">);</span>
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<span class="identifier">iterator_range</span><span class="special"><</span><span class="identifier">C</span><span class="special">,</span> <span class="identifier">D</span><span class="special">></span> <span class="identifier">range</span><span class="special">(</span><span class="identifier">c</span><span class="special">,</span> <span class="identifier">d</span><span class="special">);</span>
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="identifier">range</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
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</pre>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright <20> 2001-2007 Joel de Guzman, Dan Marsden, Tobias
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Schwinger<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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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</p>
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</div></td>
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</tr></table>
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