libs/fusion/doc/html/fusion/view/iterator_range.html


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<title>iterator_range</title>
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<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="fusion.view.iterator_range"></a><a class="link" href="iterator_range.html" title="iterator_range">iterator_range</a>
</h3></div></div></div>
<h5>
<a name="fusion.view.iterator_range.h0"></a>
        <span><a name="fusion.view.iterator_range.description"></a></span><a class="link" href="iterator_range.html#fusion.view.iterator_range.description">Description</a>
      </h5>
<p>
        <code class="computeroutput"><span class="identifier">iterator_range</span></code> presents a
        sub-range of its underlying sequence delimited by a pair of iterators.
      </p>
<h5>
<a name="fusion.view.iterator_range.h1"></a>
        <span><a name="fusion.view.iterator_range.header"></a></span><a class="link" href="iterator_range.html#fusion.view.iterator_range.header">Header</a>
      </h5>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span>
<span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span>
</pre>
<h5>
<a name="fusion.view.iterator_range.h2"></a>
        <span><a name="fusion.view.iterator_range.synopsis"></a></span><a class="link" href="iterator_range.html#fusion.view.iterator_range.synopsis">Synopsis</a>
      </h5>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</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">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">iterator_range</span><span class="special">;</span>
</pre>
<h5>
<a name="fusion.view.iterator_range.h3"></a>
        <span><a name="fusion.view.iterator_range.template_parameters"></a></span><a class="link" href="iterator_range.html#fusion.view.iterator_range.template_parameters">Template
        parameters</a>
      </h5>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  Parameter
                </p>
              </th>
<th>
                <p>
                  Description
                </p>
              </th>
<th>
                <p>
                  Default
                </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">First</span></code>
                </p>
              </td>
<td>
                <p>
                  A fusion <a class="link" href="../iterator.html" title="Iterator">Iterator</a>
                </p>
              </td>
<td>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">Last</span></code>
                </p>
              </td>
<td>
                <p>
                  A fusion <a class="link" href="../iterator.html" title="Iterator">Iterator</a>
                </p>
              </td>
<td>
              </td>
</tr>
</tbody>
</table></div>
<h5>
<a name="fusion.view.iterator_range.h4"></a>
        <span><a name="fusion.view.iterator_range.model_of"></a></span><a class="link" href="iterator_range.html#fusion.view.iterator_range.model_of">Model
        of</a>
      </h5>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
            <a class="link" href="../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward Sequence</a>,
            <a class="link" href="../sequence/concepts/bidirectional_sequence.html" title="Bidirectional Sequence">Bidirectional
            Sequence</a> or <a class="link" href="../sequence/concepts/random_access_sequence.html" title="Random Access Sequence">Random
            Access Sequence</a> depending on the traversal characteristics (see
            <a class="link" href="../sequence/concepts.html#fusion.sequence.concepts.traversal">Sequence Traversal
            Concept</a>) of its underlying sequence.
          </li>
<li class="listitem">
            <a class="link" href="../sequence/concepts/associative_sequence.html" title="Associative Sequence">Associative
            Sequence</a> if <code class="computeroutput"><span class="identifier">First</span></code>
            and <code class="computeroutput"><span class="identifier">Last</span></code> implement the
            <a class="link" href="../iterator/concepts/associative_iterator.html" title="Associative Iterator">Associative
            Iterator</a> model.
          </li>
</ul></div>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl>
<dt><span class="term"><code class="computeroutput"><span class="identifier">IR</span></code></span></dt>
<dd><p>
              An <code class="computeroutput"><span class="identifier">iterator_range</span></code> type
            </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">f</span></code></span></dt>
<dd><p>
              An instance of <code class="computeroutput"><span class="identifier">First</span></code>
            </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">l</span></code></span></dt>
<dd><p>
              An instance of <code class="computeroutput"><span class="identifier">Last</span></code>
            </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">ir</span></code>, <code class="computeroutput"><span class="identifier">ir2</span></code></span></dt>
<dd><p>
              Instances of <code class="computeroutput"><span class="identifier">iterator_range</span></code>
            </p></dd>
</dl>
</div>
<h5>
<a name="fusion.view.iterator_range.h5"></a>
        <span><a name="fusion.view.iterator_range.expression_semantics"></a></span><a class="link" href="iterator_range.html#fusion.view.iterator_range.expression_semantics">Expression
        Semantics</a>
      </h5>
<p>
        Semantics of an expression is defined only where it differs from, or is not
        defined in the implemented models.
      </p>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  Expression
                </p>
              </th>
<th>
                <p>
                  Semantics
                </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <code 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></code>
                </p>
              </td>
<td>
                <p>
                  Creates an <code class="computeroutput"><span class="identifier">iterator_range</span></code>
                  given iterators, <code class="computeroutput"><span class="identifier">f</span></code>
                  and <code class="computeroutput"><span class="identifier">l</span></code>.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">IR</span><span class="special">(</span><span class="identifier">ir</span><span class="special">)</span></code>
                </p>
              </td>
<td>
                <p>
                  Copy constructs an <code class="computeroutput"><span class="identifier">iterator_range</span></code>
                  from another <code class="computeroutput"><span class="identifier">iterator_range</span></code>,
                  <code class="computeroutput"><span class="identifier">ir</span></code>.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">ir</span> <span class="special">=</span>
                  <span class="identifier">ir2</span></code>
                </p>
              </td>
<td>
                <p>
                  Assigns to a <code class="computeroutput"><span class="identifier">iterator_range</span></code>,
                  <code class="computeroutput"><span class="identifier">ir</span></code>, from another
                  <code class="computeroutput"><span class="identifier">iterator_range</span></code>,
                  <code class="computeroutput"><span class="identifier">ir2</span></code>.
                </p>
              </td>
</tr>
</tbody>
</table></div>
<h5>
<a name="fusion.view.iterator_range.h6"></a>
        <span><a name="fusion.view.iterator_range.example"></a></span><a class="link" href="iterator_range.html#fusion.view.iterator_range.example">Example</a>
      </h5>
<pre class="programlisting"><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>
<span class="keyword">typedef</span> <a class="link" href="../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special">&lt;</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">*&gt;</span> <span class="identifier">vector_type</span><span class="special">;</span>
<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>

<span class="keyword">typedef</span> <a class="link" href="../sequence/intrinsic/metafunctions/begin.html" title="begin"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">begin</span></code></a><span class="special">&lt;</span><span class="identifier">vector_type</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">A</span><span class="special">;</span>
<span class="keyword">typedef</span> <a class="link" href="../sequence/intrinsic/metafunctions/end.html" title="end"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">end</span></code></a><span class="special">&lt;</span><span class="identifier">vector_type</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">B</span><span class="special">;</span>
<span class="keyword">typedef</span> <a class="link" href="../iterator/metafunctions/next.html" title="next"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">next</span></code></a><span class="special">&lt;</span><span class="identifier">A</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">C</span><span class="special">;</span>
<span class="keyword">typedef</span> <a class="link" href="../iterator/metafunctions/prior.html" title="prior"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">prior</span></code></a><span class="special">&lt;</span><span class="identifier">B</span><span class="special">&gt;::</span><span class="identifier">type</span> <span class="identifier">D</span><span class="special">;</span>

<span class="identifier">C</span> <span class="identifier">c</span><span class="special">(</span><span class="identifier">vec</span><span class="special">);</span>
<span class="identifier">D</span> <span class="identifier">d</span><span class="special">(</span><span class="identifier">vec</span><span class="special">);</span>

<span class="identifier">iterator_range</span><span class="special">&lt;</span><span class="identifier">C</span><span class="special">,</span> <span class="identifier">D</span><span class="special">&gt;</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>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="identifier">range</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
</pre>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2001-2006, 2011 Joel de Guzman, Dan Marsden, Tobias
      Schwinger<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        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>)
      </p>
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