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<link rel="start" href="../../../index.html" title="Chapter<65>1.<2E>Fusion 2.0">
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<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../boost.png"></td>
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<div class="section" lang="en">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="fusion.sequences.containers.vector"></a><a href="vector.html" title="vector">vector</a></h4></div></div></div>
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<a name="fusion.sequences.containers.vector.description"></a><h5>
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<a name="id477500"></a>
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<a href="vector.html#fusion.sequences.containers.vector.description">Description</a>
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</h5>
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<p>
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<tt class="computeroutput"><span class="identifier">vector</span></tt> is a <a href="../concepts/random_access_sequence.html" title="Random
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Access Sequence">Random
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Access Sequence</a> of heterogenous typed data structured as a simple
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<tt class="computeroutput"><span class="keyword">struct</span></tt> where each element
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is held as a member variable. <tt class="computeroutput"><span class="identifier">vector</span></tt>
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is the simplest of the Fusion sequence container, and in many cases the
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most efficient.
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</p>
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<a name="fusion.sequences.containers.vector.header"></a><h5>
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<a name="id477573"></a>
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<a href="vector.html#fusion.sequences.containers.vector.header">Header</a>
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</h5>
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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">sequence</span><span class="special">/</span><span class="identifier">container</span><span class="special">/</span><span class="identifier">vector</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">sequence</span><span class="special">/</span><span class="identifier">container</span><span class="special">/</span><span class="identifier">vector</span><span class="special">/</span><span class="identifier">vector_forward</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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<span class="comment">// numbered forms
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</span><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">sequence</span><span class="special">/</span><span class="identifier">container</span><span class="special">/</span><span class="identifier">vector</span><span class="special">/</span><span class="identifier">vector10</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">sequence</span><span class="special">/</span><span class="identifier">container</span><span class="special">/</span><span class="identifier">vector</span><span class="special">/</span><span class="identifier">vector20</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">sequence</span><span class="special">/</span><span class="identifier">container</span><span class="special">/</span><span class="identifier">vector</span><span class="special">/</span><span class="identifier">vector30</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">sequence</span><span class="special">/</span><span class="identifier">container</span><span class="special">/</span><span class="identifier">vector</span><span class="special">/</span><span class="identifier">vector40</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">sequence</span><span class="special">/</span><span class="identifier">container</span><span class="special">/</span><span class="identifier">vector</span><span class="special">/</span><span class="identifier">vector50</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.sequences.containers.vector.synopsis"></a><h5>
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<a name="id478181"></a>
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<a href="vector.html#fusion.sequences.containers.vector.synopsis">Synopsis</a>
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</h5>
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<p>
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<span class="bold"><b>Numbered forms</b></span>
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</p>
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<pre class="programlisting">
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<span class="keyword">template</span> <span class="special"><></span>
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<span class="keyword">struct</span> <span class="identifier">vector0</span><span class="special">;</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T0</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">vector1</span><span class="special">;</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T1</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">vector2</span><span class="special">;</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T2</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">vector3</span><span class="special">;</span>
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<span class="special">...</span>
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<span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T0</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T2</span><span class="special">...,</span> <span class="keyword">typename</span> <span class="identifier">TN</span><span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">vectorN</span><span class="special">;</span>
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</pre>
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<p>
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<span class="bold"><b>Variadic form</b></span>
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</p>
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<pre class="programlisting">
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<span class="keyword">template</span> <span class="special"><</span>
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<span class="keyword">typename</span> <span class="identifier">T0</span> <span class="special">=</span> <span class="emphasis"><em>unspecified</em></span>
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<span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T1</span> <span class="special">=</span> <span class="emphasis"><em>unspecified</em></span>
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<span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">T2</span> <span class="special">=</span> <span class="emphasis"><em>unspecified</em></span>
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<span class="special">...</span>
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<span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">TN</span> <span class="special">=</span> <span class="emphasis"><em>unspecified</em></span>
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<span class="special">></span>
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<span class="keyword">struct</span> <span class="identifier">vector</span><span class="special">;</span>
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</pre>
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<p>
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The numbered form accepts the exact number of elements. Example:
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</p>
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<pre class="programlisting">
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<span class="identifier">vector3</span><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>
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</pre>
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<p>
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The variadic form accepts <tt class="computeroutput"><span class="number">0</span></tt>
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to <tt class="computeroutput"><span class="identifier">FUSION_MAX_VECTOR_SIZE</span></tt>
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elements, where <tt class="computeroutput"><span class="identifier">FUSION_MAX_VECTOR_SIZE</span></tt>
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is a user definable predefined maximum that defaults to <tt class="computeroutput"><span class="number">10</span></tt>.
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Example:
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</p>
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<pre class="programlisting">
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<span class="identifier">vector</span><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>
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</pre>
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<p>
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You may define the preprocessor constant <tt class="computeroutput"><span class="identifier">FUSION_MAX_VECTOR_SIZE</span></tt>
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before including any Fusion header to change the default. Example:
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</p>
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<pre class="programlisting">
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<span class="preprocessor">#define</span> <span class="identifier">FUSION_MAX_VECTOR_SIZE</span> <span class="number">20</span>
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</pre>
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<a name="fusion.sequences.containers.vector.template_parameters"></a><h5>
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<a name="id478908"></a>
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<a href="vector.html#fusion.sequences.containers.vector.template_parameters">Template
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parameters</a>
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</h5>
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<div class="informaltable">
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<h4>
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<a name="id478930"></a>
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</h4>
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<table class="table">
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<colgroup>
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<col>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>Parameter</th>
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<th>Description</th>
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<th>Default</th>
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</tr></thead>
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<tbody><tr>
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<td>
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<tt class="computeroutput"><span class="identifier">T0</span></tt>...<tt class="computeroutput"><span class="identifier">TN</span></tt>
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</td>
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<td>Element types</td>
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<td><span class="emphasis"><em>unspecified</em></span></td>
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</tr></tbody>
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</table>
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</div>
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<a name="fusion.sequences.containers.vector.model_of"></a><h5>
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<a name="id479003"></a>
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<a href="vector.html#fusion.sequences.containers.vector.model_of">Model of</a>
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</h5>
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<div class="itemizedlist"><ul type="disc"><li><a href="../concepts/random_access_sequence.html" title="Random
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Access Sequence">Random
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Access Sequence</a></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">v</span></tt></span></dt>
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<dd>
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Instance of <tt class="computeroutput"><span class="identifier">vector</span></tt>
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</dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">V</span></tt></span></dt>
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<dd>
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A <tt class="computeroutput"><span class="identifier">vector</span></tt> type
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</dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">e0</span></tt>...<tt class="computeroutput"><span class="identifier">en</span></tt></span></dt>
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<dd>
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Heterogeneous values
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</dd>
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<dt><span class="term"><tt class="computeroutput"><span class="identifier">s</span></tt></span></dt>
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<dd>
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A <a href="../concepts/forward_sequence.html" title="Forward
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Sequence">Forward
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Sequence</a>
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</dd>
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</dl>
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</div>
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<a name="fusion.sequences.containers.vector.expression_semantics"></a><h5>
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<a name="id479162"></a>
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<a href="vector.html#fusion.sequences.containers.vector.expression_semantics">Expression
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Semantics</a>
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</h5>
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<p>
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Semantics of an expression is defined only where it differs from, or is
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not defined in <a href="../concepts/random_access_sequence.html" title="Random
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Access Sequence">Random
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Access Sequence</a>.
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|||
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</p>
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|||
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<div class="informaltable">
|
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<h4>
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|||
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<a name="id479200"></a>
|
|||
|
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</h4>
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|||
|
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<table class="table">
|
|||
|
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<colgroup>
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|||
|
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<col>
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|||
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<col>
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</colgroup>
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<thead><tr>
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<th>Expression</th>
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<th>Semantics</th>
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</tr></thead>
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<tbody>
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<tr>
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<td><tt class="computeroutput"><span class="identifier">V</span><span class="special">()</span></tt></td>
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<td>Creates
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a vector with default constructed elements.</td>
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</tr>
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<tr>
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<td><tt class="computeroutput"><span class="identifier">V</span><span class="special">(</span><span class="identifier">e0</span><span class="special">,</span><EFBFBD><span class="identifier">e1</span><span class="special">,...</span><EFBFBD><span class="identifier">en</span><span class="special">)</span></tt></td>
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<td>Creates
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a vector with elements <tt class="computeroutput"><span class="identifier">e0</span></tt>...<tt class="computeroutput"><span class="identifier">en</span></tt>.</td>
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</tr>
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<tr>
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<td><tt class="computeroutput"><span class="identifier">V</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span></tt></td>
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<td>Copy
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|||
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constructs a vector from a <a href="../concepts/forward_sequence.html" title="Forward
|
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Sequence">Forward
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|||
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Sequence</a>, <tt class="computeroutput"><span class="identifier">s</span></tt>.</td>
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</tr>
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<tr>
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<td><tt class="computeroutput"><span class="identifier">v</span><EFBFBD><span class="special">=</span><EFBFBD><span class="identifier">s</span></tt></td>
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<td>Assigns to a vector,
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<tt class="computeroutput"><span class="identifier">v</span></tt>, from a <a href="../concepts/forward_sequence.html" title="Forward
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Sequence">Forward
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Sequence</a>, <tt class="computeroutput"><span class="identifier">s</span></tt>.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<a name="fusion.sequences.containers.vector.example"></a><h5>
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|||
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<a name="id479448"></a>
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<a href="vector.html#fusion.sequences.containers.vector.example">Example</a>
|
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</h5>
|
|||
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<pre class="programlisting">
|
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<span class="identifier">vector</span><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">float</span><span class="special">></span> <span class="identifier">v</span><span class="special">(</span><span class="number">12</span><span class="special">,</span> <span class="number">5.5f</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> <a href="../intrinsics/functions/at_c.html" title="at_c"><tt class="computeroutput"><span class="identifier">at_c</span></tt></a><span class="special"><</span><span class="number">0</span><span class="special">>(</span><span class="identifier">v</span><span class="special">)</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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<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <a href="../intrinsics/functions/at_c.html" title="at_c"><tt class="computeroutput"><span class="identifier">at_c</span></tt></a><span class="special"><</span><span class="number">1</span><span class="special">>(</span><span class="identifier">v</span><span class="special">)</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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<td align="right"><small>Copyright <20> 2001-2005 Joel de Guzman, Dan Marsden</small></td>
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