unary_negate(3C++)

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

NAME

unary_negate

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

SYNOPSIS

#include<functional>
template <class Predicate>
class unary_negate : public

unary_function<typename Predicate::argument_type,

bool>;

DESCRIPTION

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.

INTERFACE

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&);

CONSTRUCTORS

explicit
unary_negate(const Predicate& pred);

Constructs a unary_negate object from predicate pred.

OPERATORS

bool
operator()(const typename Predicate::argument_type& x)

const;

Returns the result of unary_negate<predicate>(pred).

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