
Function Adapter (Negator)
A function object that returns the complement of the result of its unary predicate
| Member Functions |
| operator()() |
#include<functional>
template <class Predicate>
class unary_negate : public
unary_function<typename Predicate::argument_type,
bool>;
unary_negate is a function object class that includes a return type for the function adapter not1. not1 is a function adapter, known as a negator, that takes a unary predicate function object as its argument and returns a unary predicate function object that is the complement of the original.
Note that not1 works only with function objects that are defined as subclasses of the class unary_function.
template <class Predicate>
class unary_negate : public
unary_function<typename Predicate::argument_type, bool> {
public:
explicit unary_negate (const Predicate&);
bool operator() (const typename
Predicate::argument_type&) const;
};
template<class Predicate>
unary_negate <Predicate> not1 (const Predicate&);
explicit unary_negate(const Predicate& pred);
Constructs a unary_negate object from predicate pred.
bool
operator()(const typename Predicate::argument_type& x)
const;
Returns the result of unary_negate<predicate>(pred).
not1, not2, unary_function, binary_negate