const_mem_fun1_t Class
An adapter class that allows a const member function that takes a single argument to be called as a binary function object when initialized with a pointer argument.
template<class Result, class Type, class Arg>
class const_mem_fun1_t
: public binary_function<const Type *, Arg, Result>
{
explicit const_mem_fun1_t( Result ( Type::* _Pm )( Arg ) const );
Result operator()(
const Type* _Pleft,
Arg _Right
) const;
};
Parameters
_Pm
A pointer to the member function of class Type to be converted to a function object._Pleft
The const object that the _Pm member function is called on._Right
The argument that is being given to _Pm.
Return Value
An adaptable binary function.
Remarks
The template class stores a copy of _Pm, which must be a pointer to a member function of class Type, in a private member object. It defines its member function operator() as returning (_Pleft->* *Pm)(*Right) const.
Example
The constructor of const_mem_fun1_t is not usually used directly; the helper function mem_fun is used to adapt member functions. See mem_fun for an example of how to use member function adaptors.
Requirements
Header: <functional>
Namespace: std
See Also
Reference
Thread Safety in the Standard C++ Library