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<title>Struct template nullary_expr</title>
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<span class="comment">// types</span>
<span class="keyword">typedef</span> <span class="identifier">Expr</span> <a class="link" href="nullary_expr/impl.html#boost.proto.nullary_expr.impl.result_type"><span class="identifier">result_type</span></a><span class="special">;</span>
- <span class="comment">// <a class="link" href="nullary_expr/impl.html#id1548928-bb">public member functions</a></span>
- <span class="identifier">Expr</span> <a class="link" href="nullary_expr/impl.html#id1548932-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="comment">// <a class="link" href="nullary_expr/impl.html#idp227426784-bb">public member functions</a></span>
+ <span class="identifier">Expr</span> <a class="link" href="nullary_expr/impl.html#idp227427344-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="id2892666"></a><h2>Description</h2>
+<a name="idp385417024"></a><h2>Description</h2>
<p>
Use <code class="computeroutput">proto::nullary_expr<<a class="link" href="_.html" title="Struct _">proto::_</a>, <a class="link" href="_.html" title="Struct _">proto::_</a>></code>
as a grammar element to match any nullary expression.