pointer_to_binary_function 클래스
적응 가능한 이항 함수는 이항 함수 포인터로 변환합니다.
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()(
Arg1 _Left,
Arg2 _Right
) const;
};
매개 변수
_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.
반환 값
The template class stores a copy of _pfunc. It defines its member function operator() as returning (*_pfunc)(_Left, _Right).
설명
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.
예제
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.
요구 사항
헤더: <기능>
네임스페이스: std