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| <a name="boost.proto.and_"></a><div class="titlepage"></div> |
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| <h2><span class="refentrytitle">Struct template and_</span></h2> |
| <p>boost::proto::and_ — For matching all of a set of grammars. When used as a transform, |
| <code class="computeroutput">proto::and_<></code> applies the transform associated |
| with each grammar in the set and returns the result of the last.</p> |
| </div> |
| <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2> |
| <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: <<a class="link" href="../../proto/reference.html#header.boost.proto.matches_hpp" title="Header <boost/proto/matches.hpp>">boost/proto/matches.hpp</a>> |
| |
| </span><span class="keyword">template</span><span class="special"><</span><span class="keyword">typename</span><span class="special">...</span> G<span class="special">></span> |
| <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><and_<G...> > <span class="special">{</span> |
| <span class="comment">// types</span> |
| <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> |
| |
| <span class="comment">// member classes/structs/unions</span> |
| <span class="keyword">template</span><span class="special"><</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">></span> |
| <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>< Expr, State, Data > <span class="special">{</span> |
| <span class="comment">// types</span> |
| <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"><</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">></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> |
| |
| <span class="comment">// <a class="link" href="and_/impl.html#id1267764-bb">public member functions</a></span> |
| <span class="identifier">result_type</span> <a class="link" href="and_/impl.html#id1267769-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> |
| <span class="keyword">typename</span> <span class="identifier">impl</span><span class="special">::</span><span class="identifier">state_param</span><span class="special">,</span> |
| <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> |
| <span class="special">}</span><span class="special">;</span> |
| <span class="special">}</span><span class="special">;</span></pre></div> |
| <div class="refsect1"> |
| <a name="id2331078"></a><h2>Description</h2> |
| <p> |
| An expression type <code class="computeroutput">E</code> matches |
| <code class="computeroutput">proto::and_<G<sub>0</sub>,G<sub>1</sub>,...G<sub>n</sub>></code> |
| if <code class="computeroutput">E</code> matches all <code class="computeroutput">G<sub>x</sub></code> |
| for <code class="computeroutput">x</code> in <code class="computeroutput">[0,n]</code>. |
| </p> |
| <p> |
| When applying |
| <code class="computeroutput">proto::and_<G<sub>0</sub>,G<sub>1</sub>,...G<sub>n</sub>></code> |
| as a transform with an expression <code class="computeroutput">e</code>, state |
| <code class="computeroutput">s</code> and data <code class="computeroutput">d</code>, it is equivalent |
| 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>. |
| </p> |
| <p> |
| The maximun number of template arguments <code class="computeroutput">proto::and_<></code> accepts |
| 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> |
| macro. |
| </p> |
| </div> |
| </div> |
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| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2008 Eric Niebler<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> |
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