Module: Standard C++ Library Library: General utilities
Function
A function adaptor used to reverse the sense of a unary predicate function object
#include <functional>
namespace std {
template<class Predicate>
unary_negate <Predicate> not1(const Predicate&);
}
not1() is a function adaptor, 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. unary_negate is the function object class used for a return type for the not1() negator.
Note that not1() works only with function objects that are defined as subclasses of the class unary_function.
Negators, not2(), unary_function, unary_negate, pointer_to_unary_function
ISO/IEC 14882:1998 -- International Standard for Information Systems -- Programming Language C++, Section 20.3.5
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