<map id="Graphical Class Hierarchy" name="Graphical Class Hierarchy"> <area shape="rect" id="node1" href="$a06353.html" title="std::binary_function\l\< _T1, _T2, _Res \>" alt="" coords="5,12,133,51"/> <area shape="rect" id="node2" href="$a02273.html" title="Derives from binary_function, as appropriate. " alt="" coords="181,5,336,57"/> </map>