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| <div class="section"> |
| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="boost_functiontypes.reference.decomposition"></a><a class="link" href="decomposition.html" title="Class templates for type decomposition"> Class templates |
| for type decomposition</a> |
| </h3></div></div></div> |
| <div class="toc"><dl> |
| <dt><span class="section"><a href="decomposition.html#boost_functiontypes.reference.decomposition.result_type"> |
| result_type</a></span></dt> |
| <dt><span class="section"><a href="decomposition.html#boost_functiontypes.reference.decomposition.parameter_types"> |
| parameter_types</a></span></dt> |
| <dt><span class="section"><a href="decomposition.html#boost_functiontypes.reference.decomposition.function_arity"> |
| function_arity</a></span></dt> |
| <dt><span class="section"><a href="decomposition.html#boost_functiontypes.reference.decomposition.components"> |
| components</a></span></dt> |
| </dl></div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="boost_functiontypes.reference.decomposition.result_type"></a><a class="link" href="decomposition.html#boost_functiontypes.reference.decomposition.result_type" title="result_type"> |
| result_type</a> |
| </h4></div></div></div> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">result_type</span><span class="special">;</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Header</strong></span> |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">function_types</span><span class="special">/</span><span class="identifier">result_type</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <div class="variablelist"> |
| <p class="title"><b></b></p> |
| <dl> |
| <dt><span class="term"><code class="literal">F</code></span></dt> |
| <dd><p> |
| Type to analyze |
| </p></dd> |
| <dt><span class="term"><code class="literal">result_type<F>::type</code></span></dt> |
| <dd><p> |
| Result type of <code class="literal">F</code> |
| </p></dd> |
| </dl> |
| </div> |
| <p> |
| Extracts the result type of a callable, builtin type. |
| </p> |
| <p> |
| If <code class="literal">F</code> is no callable, builtin type, any attempt to access |
| the <code class="literal">type</code> member results in a compile error. |
| </p> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="boost_functiontypes.reference.decomposition.parameter_types"></a><a class="link" href="decomposition.html#boost_functiontypes.reference.decomposition.parameter_types" title="parameter_types"> |
| parameter_types</a> |
| </h4></div></div></div> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">F</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">ClassTransform</span> <span class="special">=</span> <span class="identifier">add_reference</span><span class="special"><</span><span class="identifier">_</span><span class="special">></span> <span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">parameter_types</span><span class="special">;</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Header</strong></span> |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">function_types</span><span class="special">/</span><span class="identifier">parameter_types</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <div class="variablelist"> |
| <p class="title"><b></b></p> |
| <dl> |
| <dt><span class="term"><code class="literal">F</code></span></dt> |
| <dd><p> |
| Type to analyze |
| </p></dd> |
| <dt><span class="term"><code class="literal">ClassTransform</code></span></dt> |
| <dd><p> |
| <a href="../../../../../mpl/index.html" target="_top">MPL</a> - <a href="../../../../../mpl/doc/refmanual/lambda-expression.html" target="_top">Lambda |
| Expression</a> to transform the class type if <code class="literal">F</code> |
| is a member function pointer |
| </p></dd> |
| <dt><span class="term"><code class="literal">parameter_types<F,ClassTransform></code></span></dt> |
| <dd><p> |
| <a href="../../../../../mpl/index.html" target="_top">MPL</a> - <a href="../../../../../mpl/doc/refmanual/front-extensible-sequence.html" target="_top">Front</a> |
| / <a href="../../../../../mpl/doc/refmanual/back-extensible-sequence.html" target="_top">Back |
| </a><a href="../../../../../mpl/doc/refmanual/extensible-sequence.html" target="_top">Extensible |
| </a><a href="../../../../../mpl/doc/refmanual/random-access-sequence.html" target="_top">Random |
| Access Sequence</a> of parameter types |
| </p></dd> |
| </dl> |
| </div> |
| <p> |
| Extracts the parameter types of a callable, builtin type. |
| </p> |
| <p> |
| If <code class="literal">F</code> is no callable, builtin type, any attempt to access |
| the sequence results in a compile error. |
| </p> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="boost_functiontypes.reference.decomposition.function_arity"></a><a class="link" href="decomposition.html#boost_functiontypes.reference.decomposition.function_arity" title="function_arity"> |
| function_arity</a> |
| </h4></div></div></div> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">F</span><span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">function_arity</span><span class="special">;</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Header</strong></span> |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">function_types</span><span class="special">/</span><span class="identifier">function_arity</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <div class="variablelist"> |
| <p class="title"><b></b></p> |
| <dl> |
| <dt><span class="term"><code class="literal">F</code></span></dt> |
| <dd><p> |
| Callable builtin type |
| </p></dd> |
| <dt><span class="term"><code class="literal">function_arity<F></code></span></dt> |
| <dd><p> |
| Function arity as <a href="../../../../../mpl/index.html" target="_top">MPL</a> |
| - <a href="../../../../../mpl/doc/refmanual/integral-constant.html" target="_top">Integral |
| Constant</a> |
| </p></dd> |
| <dt><span class="term"><code class="literal">function_arity<F>::value</code></span></dt> |
| <dd><p> |
| Constant value of the function arity |
| </p></dd> |
| </dl> |
| </div> |
| <p> |
| Extracts the function arity, that is the number of parameters. The hidden |
| <code class="literal">this</code> of member function pointers counts, in other words |
| the arity value is always greater than or equal to one if <code class="literal">F</code> |
| is a member function pointer. |
| </p> |
| <p> |
| If <code class="literal">F</code> is no callable, builtin type, any attempt to access |
| the value results in a compile error. |
| </p> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h4 class="title"> |
| <a name="boost_functiontypes.reference.decomposition.components"></a><a class="link" href="decomposition.html#boost_functiontypes.reference.decomposition.components" title="components"> |
| components</a> |
| </h4></div></div></div> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span> <span class="identifier">T</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">ClassTransform</span> <span class="special">=</span> <span class="identifier">add_reference</span><span class="special"><</span><span class="identifier">_</span><span class="special">></span> <span class="special">></span> |
| <span class="keyword">struct</span> <span class="identifier">components</span><span class="special">;</span> |
| </pre> |
| <p> |
| <span class="bold"><strong>Header</strong></span> |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">function_types</span><span class="special">/</span><span class="identifier">components</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <div class="variablelist"> |
| <p class="title"><b></b></p> |
| <dl> |
| <dt><span class="term"><code class="literal">T</code></span></dt> |
| <dd><p> |
| Type to analyze |
| </p></dd> |
| <dt><span class="term"><code class="literal">ClassTransform</code></span></dt> |
| <dd><p> |
| <a href="../../../../../mpl/index.html" target="_top">MPL</a> - <a href="../../../../../mpl/doc/refmanual/lambda-expression.html" target="_top">Lambda |
| Expression</a> to transform the class type if <code class="literal">T</code> |
| is a member function pointer |
| </p></dd> |
| <dt><span class="term"><code class="literal">components<T,ClassTransform></code></span></dt> |
| <dd><p> |
| <a href="../../../../../mpl/index.html" target="_top">MPL</a> - <a href="../../../../../mpl/doc/refmanual/front-extensible-sequence.html" target="_top">Front</a> |
| / <a href="../../../../../mpl/doc/refmanual/back-extensible-sequence.html" target="_top">Back |
| </a><a href="../../../../../mpl/doc/refmanual/extensible-sequence.html" target="_top">Extensible |
| </a><a href="../../../../../mpl/doc/refmanual/random-access-sequence.html" target="_top">Random |
| Access Sequence</a> of all component types and property tag |
| </p></dd> |
| <dt><span class="term"><code class="literal">components<T,ClassTransform>::types</code></span></dt> |
| <dd><p> |
| Decorated MPL Sequence, exposed for optimization |
| </p></dd> |
| </dl> |
| </div> |
| <p> |
| Extracts all properties of a callable builtin type, that is the result |
| type, followed by the parameter types (including the type of <code class="literal">this</code> |
| for member function pointers). |
| </p> |
| <p> |
| If <code class="literal">T</code> is no callable builtin type, the component types |
| are an empty sequence and the Tag's meaning is equivalent to the <code class="literal"><a class="link" href="tag_types.html#boost_functiontypes.reference.tag_types.null_tag" title="null_tag">null_tag</a></code>. |
| </p> |
| </div> |
| </div> |
| <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> |
| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2004 -2007 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> |
| </div></td> |
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