1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>as_map</title> 5<link rel="stylesheet" href="../../../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../../index.html" title="Chapter 1. Fusion 2.2"> 8<link rel="up" href="../metafunctions.html" title="Metafunctions"> 9<link rel="prev" href="as_set.html" title="as_set"> 10<link rel="next" href="../../../view.html" title="View"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="as_set.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../metafunctions.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../../../view.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="fusion.container.conversion.metafunctions.as_map"></a><a class="link" href="as_map.html" title="as_map">as_map</a> 28</h5></div></div></div> 29<h6> 30<a name="fusion.container.conversion.metafunctions.as_map.h0"></a> 31 <span class="phrase"><a name="fusion.container.conversion.metafunctions.as_map.description"></a></span><a class="link" href="as_map.html#fusion.container.conversion.metafunctions.as_map.description">Description</a> 32 </h6> 33<p> 34 Returns the result type of <a class="link" href="../functions/as_map.html" title="as_map"><code class="computeroutput"><span class="identifier">as_map</span></code></a>. 35 </p> 36<h6> 37<a name="fusion.container.conversion.metafunctions.as_map.h1"></a> 38 <span class="phrase"><a name="fusion.container.conversion.metafunctions.as_map.synopsis"></a></span><a class="link" href="as_map.html#fusion.container.conversion.metafunctions.as_map.synopsis">Synopsis</a> 39 </h6> 40<pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">typename</span> <span class="identifier">Sequence</span><span class="special">></span> 41<span class="keyword">struct</span> <span class="identifier">as_map</span><span class="special">;</span> 42</pre> 43<h6> 44<a name="fusion.container.conversion.metafunctions.as_map.h2"></a> 45 <span class="phrase"><a name="fusion.container.conversion.metafunctions.as_map.parameters"></a></span><a class="link" href="as_map.html#fusion.container.conversion.metafunctions.as_map.parameters">Parameters</a> 46 </h6> 47<div class="informaltable"><table class="table"> 48<colgroup> 49<col> 50<col> 51<col> 52</colgroup> 53<thead><tr> 54<th> 55 <p> 56 Parameter 57 </p> 58 </th> 59<th> 60 <p> 61 Requirement 62 </p> 63 </th> 64<th> 65 <p> 66 Description 67 </p> 68 </th> 69</tr></thead> 70<tbody><tr> 71<td> 72 <p> 73 <code class="computeroutput"><span class="identifier">Sequence</span></code> 74 </p> 75 </td> 76<td> 77 <p> 78 A fusion <a class="link" href="../../../sequence.html" title="Sequence">Sequence</a> 79 </p> 80 </td> 81<td> 82 <p> 83 The sequence to convert. 84 </p> 85 </td> 86</tr></tbody> 87</table></div> 88<h6> 89<a name="fusion.container.conversion.metafunctions.as_map.h3"></a> 90 <span class="phrase"><a name="fusion.container.conversion.metafunctions.as_map.expression_semantics"></a></span><a class="link" href="as_map.html#fusion.container.conversion.metafunctions.as_map.expression_semantics">Expression 91 Semantics</a> 92 </h6> 93<pre class="programlisting"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">as_map</span><span class="special"><</span><span class="identifier">Sequence</span><span class="special">>::</span><span class="identifier">type</span><span class="special">;</span> 94</pre> 95<p> 96 <span class="bold"><strong>Return type</strong></span>: A <a class="link" href="../../map.html" title="map"><code class="computeroutput"><span class="identifier">map</span></code></a> with same elements as the 97 input sequence, <code class="computeroutput"><span class="identifier">Sequence</span></code>. 98 </p> 99<p> 100 <span class="bold"><strong>Semantics</strong></span>: Convert a fusion sequence, 101 <code class="computeroutput"><span class="identifier">Sequence</span></code>, to a <a class="link" href="../../map.html" title="map"><code class="computeroutput"><span class="identifier">map</span></code></a>. 102 </p> 103<p> 104 <span class="bold"><strong>Precondition</strong></span>: For non-associative sequence, 105 the elements are assumed to be __fusion_pair__s. There may be no duplicate 106 <a class="link" href="../../../support/pair.html" title="pair"><code class="computeroutput"><span class="identifier">fusion</span><span class="special">::</span><span class="identifier">pair</span></code></a> 107 key types. 108 </p> 109<h6> 110<a name="fusion.container.conversion.metafunctions.as_map.h4"></a> 111 <span class="phrase"><a name="fusion.container.conversion.metafunctions.as_map.header"></a></span><a class="link" href="as_map.html#fusion.container.conversion.metafunctions.as_map.header">Header</a> 112 </h6> 113<pre class="programlisting"><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">container</span><span class="special">/</span><span class="identifier">map</span><span class="special">/</span><span class="identifier">convert</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 114<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">as_map</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 115</pre> 116<h6> 117<a name="fusion.container.conversion.metafunctions.as_map.h5"></a> 118 <span class="phrase"><a name="fusion.container.conversion.metafunctions.as_map.example"></a></span><a class="link" href="as_map.html#fusion.container.conversion.metafunctions.as_map.example">Example</a> 119 </h6> 120<pre class="programlisting"><span class="comment">// from sequence of __fusion_pair__</span> 121<span class="identifier">result_of</span><span class="special">::</span><span class="identifier">as_map</span><span class="special"><</span><a class="link" href="../../vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span> 122 <a class="link" href="../../../support/pair.html" title="pair"><code class="computeroutput"><span class="identifier">fusion</span><span class="special">::</span><span class="identifier">pair</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span> <span class="keyword">char</span><span class="special">></span> 123 <span class="special">,</span> <a class="link" href="../../../support/pair.html" title="pair"><code class="computeroutput"><span class="identifier">fusion</span><span class="special">::</span><span class="identifier">pair</span></code></a><span class="special"><</span><span class="keyword">double</span><span class="special">,</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">></span> <span class="special">></span> <span class="special">>::</span><span class="identifier">type</span> 124 125<span class="comment">// from associative sequence</span> 126<span class="keyword">namespace</span> <span class="identifier">ns</span> 127<span class="special">{</span> 128 <span class="keyword">struct</span> <span class="identifier">x_member</span><span class="special">;</span> 129 <span class="keyword">struct</span> <span class="identifier">y_member</span><span class="special">;</span> 130<span class="special">}</span> 131<span class="identifier">BOOST_FUSION_DEFINE_ASSOC_STRUCT</span><span class="special">(</span> 132 <span class="special">(</span><span class="identifier">ns</span><span class="special">),</span> 133 <span class="identifier">point</span><span class="special">,</span> 134 <span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">x</span><span class="special">,</span> <span class="identifier">ns</span><span class="special">::</span><span class="identifier">x_member</span><span class="special">)</span> 135 <span class="special">(</span><span class="keyword">int</span><span class="special">,</span> <span class="identifier">y</span><span class="special">,</span> <span class="identifier">ns</span><span class="special">::</span><span class="identifier">y_member</span><span class="special">)</span> 136<span class="special">)</span> 137<span class="special">...</span> 138<span class="identifier">result_of</span><span class="special">::</span><span class="identifier">as_map</span><span class="special"><</span><span class="identifier">ns</span><span class="special">::</span><span class="identifier">point</span><span class="special">>::</span><span class="identifier">type</span> <span class="comment">// __map__<__fusion_pair__<ns::x_member, int>, __fusion_pair__<ns::y_member, int> ></span> 139</pre> 140</div> 141<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 142<td align="left"></td> 143<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman, 144 Dan Marsden, Tobias Schwinger<p> 145 Distributed under the Boost Software License, Version 1.0. (See accompanying 146 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>) 147 </p> 148</div></td> 149</tr></table> 150<hr> 151<div class="spirit-nav"> 152<a accesskey="p" href="as_set.html"><img src="../../../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../metafunctions.html"><img src="../../../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="../../../view.html"><img src="../../../../../../../../doc/src/images/next.png" alt="Next"></a> 153</div> 154</body> 155</html> 156
