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| <h2><span class="refentrytitle">Struct template not_</span></h2> |
| <p>boost::proto::not_ — Inverts the set of expressions matched by a grammar. When used as a transform, |
| <code class="computeroutput">proto::not_<></code> returns the current expression unchanged. |
| </p> |
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| <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> Grammar<span class="special">></span> |
| <span class="keyword">struct</span> <a class="link" href="not_.html" title="Struct template not_">not_</a> <span class="special">:</span> <span class="keyword"></span> <a class="link" href="transform.html" title="Struct template transform">proto::transform</a><not_<Grammar> > <span class="special">{</span> |
| <span class="comment">// types</span> |
| <span class="keyword">typedef</span> <span class="identifier">not_</span> <a name="boost.proto.not_.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="not_/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="identifier">Expr</span> <a class="link" href="not_/impl.html#boost.proto.not_.impl.result_type"><span class="identifier">result_type</span></a><span class="special">;</span> |
| |
| <span class="comment">// <a class="link" href="not_/impl.html#id1266692-bb">public member functions</a></span> |
| <span class="identifier">Expr</span> <a class="link" href="not_/impl.html#id1266696-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="id2326638"></a><h2>Description</h2> |
| <p> |
| If an expression type <code class="computeroutput">E</code> does not match a grammar |
| <code class="computeroutput">G</code>, then <code class="computeroutput">E</code> <span class="emphasis"><em>does</em></span> |
| match <code class="computeroutput">proto::not_<G></code>. For example, |
| <code class="computeroutput"><a class="link" href="not_.html" title="Struct template not_">proto::not_</a><<a class="link" href="terminal.html" title="Struct template terminal">proto::terminal</a><<a class="link" href="_.html" title="Struct _">proto::_</a>> ></code> |
| will match any non-terminal. |
| </p> |
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| <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>) |
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