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