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<div class="navpath"><a class="el" href="namespacesigc.html">sigc</a>::<a class="el" href="structsigc_1_1adaptor__base.html">adaptor_base</a>
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<h1>sigc::adaptor_base Struct Reference<br/>
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[<a class="el" href="group__adaptors.html">Adaptors</a>]</small>
</h1><!-- doxytag: class="sigc::adaptor_base" --><!-- doxytag: inherits="sigc::functor_base" -->
<p>A hint to the compiler. <a href="#_details">More...</a></p>
<p><code>#include <sigc++/adaptors/deduce_result_type.h></code></p>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>A hint to the compiler. </p>
<p>Functors which have all methods based on templates should publicly inherit from this hint and define a nested template class <code><a class="el" href="structsigc_1_1deduce__result__type.html" title="Deduce the return type of a functor.">deduce_result_type</a></code> that can be used to deduce the methods' return types.</p>
<p><a class="el" href="structsigc_1_1adaptor__base.html" title="A hint to the compiler.">adaptor_base</a> inherits from the <a class="el" href="structsigc_1_1functor__base.html" title="A hint to the compiler.">functor_base</a> hint so derived types should also have a result_type defined.</p>
<p>Adaptors don't inherit from this type directly. They use use <a class="el" href="structsigc_1_1adapts.html" title="Base type for adaptors.">sigc::adapts</a> as a base type instead. sigc::adaptors wraps arbitrary functor types as well as function pointers and class methods. </p>
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