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<link rel="start" href="../../../index.html" title="Chapter 1. Fusion 2.0">
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<a accesskey="p" href="list.html"><img src="../../../images/prev.png" alt="Prev"></a><a accesskey="u" href="../containers.html"><img src="../../../images/up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../images/home.png" alt="Home"></a><a accesskey="n" href="map.html"><img src="../../../images/next.png" alt="Next"></a>
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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.set"></a><a href="set.html" title="set">set</a></h4></div></div></div>
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<a name="fusion.sequences.containers.set.description"></a><h5>
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<a name="id972315"></a>
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<a href="set.html#fusion.sequences.containers.set.description">Description</a>
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</h5>
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<p>
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set is an <a href="../concepts/associative_sequence.html" title="Associative
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Sequence">Associative
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Sequence</a> of heteregenous typed data elements. Type identity is used
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to impose an equivalence relation on keys. The element's type is its key.
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A set may contain at most one element for each key. Membership testing
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and element key lookup has constant runtime complexity (see <a href="../../notes.html#fusion.notes.overloaded_functions">Overloaded
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Functions</a>).
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</p>
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<a name="fusion.sequences.containers.set.header"></a><h5>
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<a name="id972364"></a>
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<a href="set.html#fusion.sequences.containers.set.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">set</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.set.synopsis"></a><h5>
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<a name="id972454"></a>
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<a href="set.html#fusion.sequences.containers.set.synopsis">Synopsis</a>
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</h5>
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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">set</span><span class="special">;</span>
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</pre>
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<p>
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The variadic class interface accepts <code class="computeroutput"><span class="number">0</span></code>
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to <code class="computeroutput"><span class="identifier">FUSION_MAX_SET_SIZE</span></code>
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elements, where <code class="computeroutput"><span class="identifier">FUSION_MAX_SET_SIZE</span></code>
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is a user definable predefined maximum that defaults to <code class="computeroutput"><span class="number">10</span></code>.
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Example:
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</p>
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<pre class="programlisting">
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<span class="identifier">set</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 <code class="computeroutput"><span class="identifier">FUSION_MAX_SET_SIZE</span></code>
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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_SET_SIZE</span> <span class="number">20</span>
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</pre>
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<a name="fusion.sequences.containers.set.template_parameters"></a><h5>
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<a name="id972737"></a>
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<a href="set.html#fusion.sequences.containers.set.template_parameters">Template
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parameters</a>
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</h5>
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<div class="informaltable"><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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<code class="computeroutput"><span class="identifier">T0</span></code>...<code class="computeroutput"><span class="identifier">TN</span></code>
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</td>
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<td>Element types</td>
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<td><span class="emphasis"><em>unspecified-type</em></span></td>
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</tr></tbody>
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</table></div>
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<a name="fusion.sequences.containers.set.model_of"></a><h5>
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<a name="id972817"></a>
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<a href="set.html#fusion.sequences.containers.set.model_of">Model of</a>
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</h5>
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<div class="itemizedlist"><ul type="disc">
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<li><a href="../concepts/associative_sequence.html" title="Associative
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Sequence">Associative
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Sequence</a></li>
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<li><a href="../concepts/forward_sequence.html" title="Forward
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Sequence">Forward Sequence</a></li>
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</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"><code class="computeroutput"><span class="identifier">S</span></code></span></dt>
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<dd>
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A <code class="computeroutput"><span class="identifier">set</span></code> type
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</dd>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">s</span></code></span></dt>
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<dd>
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An instance of <code class="computeroutput"><span class="identifier">set</span></code>
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</dd>
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<dt><span class="term"><code class="computeroutput"><span class="identifier">e0</span></code>...<code class="computeroutput"><span class="identifier">en</span></code></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"><code class="computeroutput"><span class="identifier">fs</span></code></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.set.expression_semantics"></a><h5>
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<a name="id972968"></a>
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<a href="set.html#fusion.sequences.containers.set.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> and <a href="../concepts/associative_sequence.html" title="Associative
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Sequence">Associative
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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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<col>
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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><code class="computeroutput"><span class="identifier">S</span><span class="special">()</span></code></td>
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<td>Creates
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a set with default constructed elements.</td>
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</tr>
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<tr>
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<td><code class="computeroutput"><span class="identifier">S</span><span class="special">(</span><span class="identifier">e0</span><span class="special">,</span> <span class="identifier">e1</span><span class="special">,...</span>
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<span class="identifier">en</span><span class="special">)</span></code></td>
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<td>Creates
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a set with elements <code class="computeroutput"><span class="identifier">e0</span></code>...<code class="computeroutput"><span class="identifier">en</span></code>.</td>
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</tr>
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<tr>
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<td><code class="computeroutput"><span class="identifier">S</span><span class="special">(</span><span class="identifier">fs</span><span class="special">)</span></code></td>
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<td>Copy
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constructs a set from a <a href="../concepts/forward_sequence.html" title="Forward
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Sequence">Forward
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Sequence</a> <code class="computeroutput"><span class="identifier">fs</span></code>.</td>
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</tr>
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<tr>
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<td><code class="computeroutput"><span class="identifier">s</span> <span class="special">=</span>
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<span class="identifier">fs</span></code></td>
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<td>Assigns
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to a set, <code class="computeroutput"><span class="identifier">s</span></code>, from
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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> <code class="computeroutput"><span class="identifier">fs</span></code>.</td>
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</tr>
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</tbody>
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</table></div>
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<a name="fusion.sequences.containers.set.example"></a><h5>
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<a name="id973224"></a>
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<a href="set.html#fusion.sequences.containers.set.example">Example</a>
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</h5>
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<pre class="programlisting">
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<span class="keyword">typedef</span> <span class="identifier">set</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">S</span><span class="special">;</span>
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<span class="identifier">S</span> <span class="identifier">s</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_key.html" title="at_key"><code class="computeroutput"><span class="identifier">at_key</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">>(</span><span class="identifier">s</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_key.html" title="at_key"><code class="computeroutput"><span class="identifier">at_key</span></code></a><span class="special"><</span><span class="keyword">float</span><span class="special">>(</span><span class="identifier">s</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/metafunctions/has_key.html" title="has_key"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">has_key</span></code></a><span class="special"><</span><span class="identifier">S</span><span class="special">,</span> <span class="keyword">double</span><span class="special">>::</span><span class="identifier">value</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"><small>Copyright © 2001-2005 Joel de Guzman, Dan Marsden</small></td>
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</tr></table>
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<hr>
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