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<title>Macro BOOST_PROTO_ASSERT_MATCHES</title>
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<h2><span class="refentrytitle">Macro BOOST_PROTO_ASSERT_MATCHES</span></h2>
<p>BOOST_PROTO_ASSERT_MATCHES —
Assert at compile time that a particular expression
matches the specified grammar.
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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.debug_hpp" title="Header <boost/proto/debug.hpp>">boost/proto/debug.hpp</a>>
</span>BOOST_PROTO_ASSERT_MATCHES(expr, Grammar)</pre></div>
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<a name="idp464160368"></a><h2>Description</h2>
<p>
Use <code class="computeroutput">BOOST_PROTO_ASSERT_MATCHES()</code> to assert at compile-time that
an expression matches a grammar.
</p>
<p>
<span class="bold"><strong>Example:</strong></span></p>
<pre class="programlisting"><span class="keyword">typedef</span> <a class="link" href="boost/proto/plus.html" title="Struct template plus">proto::plus</a><span class="special"><</span> <a class="link" href="boost/proto/terminal.html" title="Struct template terminal">proto::terminal</a><span class="special"><</span> <span class="keyword">int</span> <span class="special">></span><span class="special">,</span> <a class="link" href="boost/proto/terminal.html" title="Struct template terminal">proto::terminal</a><span class="special"><</span> <span class="keyword">int</span> <span class="special">></span> <span class="special">></span> <span class="identifier">PlusInts</span><span class="special">;</span>
<span class="identifier">BOOST_PROTO_ASSERT_MATCHES</span><span class="special">(</span> <a class="link" href="boost/proto/lit_idp709996480.html" title="Function lit">proto::lit</a><span class="special">(</span><span class="number">1</span><span class="special">)</span> <span class="special">+</span> <span class="number">42</span><span class="special">,</span> <span class="identifier">PlusInts</span> <span class="special">)</span><span class="special">;</span></pre>
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</p>
<p>
See also:
</p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><code class="computeroutput"><a class="link" href="boost/proto/assert_matches.html" title="Function template assert_matches">proto::assert_matches</a>()</code></li>
<li class="listitem"><code class="computeroutput"><a class="link" href="boost/proto/assert_matches_not.html" title="Function template assert_matches_not">proto::assert_matches_not</a>()</code></li>
<li class="listitem"><code class="computeroutput"><a class="link" href="BOOST_PROTO_ASSERT_MATCHES_NOT.html" title="Macro BOOST_PROTO_ASSERT_MATCHES_NOT">BOOST_PROTO_ASSERT_MATCHES_NOT</a>()</code></li>
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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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