</code></a>:
</p>

<blockquote><pre>
<span class=identifier>const_mem_fun</span><span class=special>&lt;</span><span class=identifier><i>(base type)</i></span><span class=special>,</span><span class=identifier><i>(key type)</i></span><span class=special>,</span><span class=identifier><i>(pointer to member function)</i></span><span class=special>&gt;</span>
</pre></blockquote>

<p>
The member function referred to must be <code>const</code>, take no arguments and return
a value of the specified key type.
Almo