unary_negate

Function Adapter (Negator)

• Summary
• Data Type and Member Function Indexes
• Synopsis
• Description
• Interface
• Constructors
• Operators
• See Also

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