binary_negate(3C++)

Standard C++ Library
Copyright 1998, Rogue Wave Software, Inc.

NAME

binary_negate

- A function object that returns the complement of the result of its binary predicate.

SYNOPSIS

#include <functional>
template<class Predicate>
class binary_negate ;

DESCRIPTION

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.

INTERFACE

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);

CONSTRUCTORS

explicit binary_negate(const Predicate& pred);

Constructs a binary_negate object from predicate pred.

OPERATORS

bool
operator()(const first_argument_type& x,

const second_argument_type& y) const;

Returns the result of pred(x,y).

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