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  • Committer: Package Import Robot
  • Author(s): Steve M. Robbins
  • Date: 2012-02-26 00:31:44 UTC
  • Revision ID: package-import@ubuntu.com-20120226003144-eaytp12cbf6ubpms
Tags: upstream-1.49.0
Import upstream version 1.49.0

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<html>
 
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<head>
 
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<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
 
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<title>Struct template and_</title>
 
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<link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css">
 
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<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
 
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<link rel="home" href="../../index.html" title="The Boost C++ Libraries BoostBook Documentation Subset">
 
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<link rel="up" href="../../proto/reference.html#header.boost.proto.matches_hpp" title="Header &lt;boost/proto/matches.hpp&gt;">
 
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</head>
 
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
 
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<table cellpadding="2" width="100%"><tr>
 
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<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../boost.png"></td>
 
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<td align="center"><a href="../../../../index.html">Home</a></td>
 
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<td align="center"><a href="../../../../libs/libraries.htm">Libraries</a></td>
 
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<div class="spirit-nav">
 
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<a accesskey="p" href="or_/impl.html"><img src="../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../../proto/reference.html#header.boost.proto.matches_hpp"><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="and_/impl.html"><img src="../../../../doc/src/images/next.png" alt="Next"></a>
 
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</div>
 
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<div class="refentry">
 
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<a name="boost.proto.and_"></a><div class="titlepage"></div>
 
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<div class="refnamediv">
 
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<h2><span class="refentrytitle">Struct template and_</span></h2>
 
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<p>boost::proto::and_ &#8212; For matching all of a set of grammars. When used as a transform,
 
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          <code class="computeroutput">proto::and_&lt;&gt;</code> applies the transform associated
 
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          with each grammar in the set and returns the result of the last.</p>
 
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</div>
 
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
 
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<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../proto/reference.html#header.boost.proto.matches_hpp" title="Header &lt;boost/proto/matches.hpp&gt;">boost/proto/matches.hpp</a>&gt;
 
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</span><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span><span class="special">...</span> G<span class="special">&gt;</span> 
 
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<span class="keyword">struct</span> <a class="link" href="and_.html" title="Struct template and_">and_</a> <span class="special">:</span> <span class="keyword"></span> <a class="link" href="transform.html" title="Struct template transform">proto::transform</a>&lt;and_&lt;G...&gt; &gt; <span class="special">{</span>
 
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  <span class="comment">// types</span>
 
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  <span class="keyword">typedef</span> <span class="identifier">and_</span> <a name="boost.proto.and_.proto_grammar"></a><span class="identifier">proto_grammar</span><span class="special">;</span>
 
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  <span class="comment">// member classes/structs/unions</span>
 
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  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> <a class="link" href="../../Expr.html" title="Concept Expr">Expr</a><span class="special">,</span> <span class="keyword">typename</span> State<span class="special">,</span> <span class="keyword">typename</span> Data<span class="special">&gt;</span> 
 
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  <span class="keyword">struct</span> <a class="link" href="and_/impl.html" title="Struct template impl">impl</a> <span class="special">:</span> <span class="keyword"></span> <a class="link" href="transform_impl.html" title="Struct template transform_impl">proto::transform_impl</a>&lt; Expr, State, Data &gt; <span class="special">{</span>
 
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    <span class="comment">// types</span>
 
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    <span class="keyword">typedef</span> <span class="keyword">typename</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">result_of</span><span class="special">&lt;</span><span class="identifier">G</span><sub><span class="identifier">n</span></sub><span class="special">(</span><span class="identifier">Expr</span><span class="special">,</span> <span class="identifier">State</span><span class="special">,</span> <span class="identifier">Data</span><span class="special">)</span><span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <a class="link" href="and_/impl.html#boost.proto.and_.impl.result_type"><span class="identifier">result_type</span></a><span class="special">;</span>
 
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    <span class="comment">// <a class="link" href="and_/impl.html#id1505870-bb">public member functions</a></span>
 
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    <span class="identifier">result_type</span> <a class="link" href="and_/impl.html#id1505875-bb"><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span></a><span class="special">(</span><span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">expr_param</span><span class="special">,</span> 
 
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                           <span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">state_param</span><span class="special">,</span> 
 
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                           <span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">data_param</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
 
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  <span class="special">}</span><span class="special">;</span>
 
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<span class="special">}</span><span class="special">;</span></pre></div>
 
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<div class="refsect1">
 
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<a name="id2763839"></a><h2>Description</h2>
 
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<p>
 
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            An expression type <code class="computeroutput">E</code> matches
 
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            <code class="computeroutput">proto::and_&lt;G<sub>0</sub>,G<sub>1</sub>,...G<sub>n</sub>&gt;</code>
 
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            if <code class="computeroutput">E</code> matches all <code class="computeroutput">G<sub>x</sub></code>
 
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            for <code class="computeroutput">x</code> in <code class="computeroutput">[0,n]</code>.
 
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          </p>
 
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<p>
 
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            When applying
 
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            <code class="computeroutput">proto::and_&lt;G<sub>0</sub>,G<sub>1</sub>,...G<sub>n</sub>&gt;</code>
 
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            as a transform with an expression <code class="computeroutput">e</code>, state
 
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            <code class="computeroutput">s</code> and data <code class="computeroutput">d</code>, it is equivalent
 
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            to <code class="computeroutput">(G<sub>0</sub>()(e, s, d),G<sub>1</sub>()(e, s, d),...G<sub>n</sub>()(e, s, d))</code>.
 
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          </p>
 
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<p>
 
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            The maximun number of template arguments <code class="computeroutput">proto::and_&lt;&gt;</code> accepts
 
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            is controlled by the <code class="computeroutput"><a class="link" href="../../BOOST_PROTO_MAX_LOGICAL_ARITY.html" title="Macro BOOST_PROTO_MAX_LOGICAL_ARITY">BOOST_PROTO_MAX_LOGICAL_ARITY</a></code>
 
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            macro.
 
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          </p>
 
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</div>
 
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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"><div class="copyright-footer">Copyright &#169; 2008 Eric Niebler<p>
 
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        Distributed under the Boost Software License, Version 1.0. (See accompanying
 
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        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>)
 
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      </p>
 
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