pointer_to_binary_function
Converts a binary function pointer into an adaptable binary function.
template<class Arg1, class Arg2, class Result> class pointer_to_binary_function : public binary_function <Arg1, Arg2, Result> { public: explicit pointer_to_binary_function( Result (*_pfunc )( Arg1, Arg2 ) ); Result operator()( const Arg1 _Left, const Arg2 _Right ) const; };
Parameters
 _pfunc

The binary function to be converted.
 _Left

The left object that the *_pfunc is called on.
 _Right

The right object that the *_pfunc is called on.
A binary function pointer is a function object and may be passed to any Standard Template Library algorithm that is expecting a binary function as a parameter, but it is not adaptable. To use it with an adaptor, such as binding a value to it or using it with a negator, it must be supplied with the nested types first_argument_type, second_argument_type, and result_type that make such an adaptation possible. The conversion by pointer_to_binary_function allows the function adaptors to work with binary function pointers.
The constructor of pointer_to_binary_function is rarely used directly. See the helper function ptr_fun for an example of how to declare and use the pointer_to_binary_function adaptor predicate.