
Function Object
A function object that returns the complement of the result of its binary predicate.
| Member Functions |
| operator()() |
#include <functional> template<class Predicate> class binary_negate ;
binary_negate is a function object class with a return type for the function adaptor not2. not2 is a function adaptor, known as a negator, that takes a binary predicate function object as its argument and returns a binary predicate function object that is the complement of the original.
Note that not2 works only with function objects that are defined as subclasses of the class binary_function.
template<class Predicate>
class binary_negate
: public binary_function<typename
Predicate::first_argument_type,
typename
Predicate::second_argument_type,
bool>
{
public:
typedef typename binary_function<typename
Predicate::first_argument_type, typename
Predicate::second_argument_type,
bool>::second_argument_type second_argument_type;
explicit binary_negate (const Predicate&);
bool operator()
(const typename Predicate::first_argument_type&,
const typename Predicate::second_argument_type&)
const;
};
// Non-member Functions
template <class Predicate>
binary_negate<Predicate> not2 (const Predicate& pred);
explicit binary_negate(const Predicate& pred);
Constructs a binary_negate object from predicate pred.
bool
operator()(const first_argument_type& x,
const second_argument_type& y) const;
Returns the result of pred(x,y).
binary_function, not2, unary_negate