negate (3C++std) - Tru64 UNIX
Standard C++ LibraryCopyright 1996, Rogue Wave Software, Inc.
NAME
negate - Unary function object that returns the negation of its argument.
SYNOPSIS
#include <functional>
template <class T>
struct negate : public unary_function<T, T>;
DESCRIPTION
negate is a unary function object. Its operator() returns the negation of
its argument, i.e., true if its argument is false, or false if its argument
is true. You can pass a negate object to any algorithm that requires a
unary function. For example, the transform algorithm applies a unary
operation to the values in a collection and stores the result. negate
could be used in that algorithm in the following manner:
vector<int> vec1;
vector<int> vecResult;
transform(vec1.begin(), vec1.end(),
vecResult.begin(), negate<int>());
After this call to transform, vecResult(n) will contain the negation of the
element in vec1(n).
INTERFACE
template <class T>
struct negate : unary_function<T, T> {
typedef typename unary_function<T,T>::argument_type argument_type;
typedef typename unary_function<T,T>::result_type result_type;
T operator() (const T&) const;
};
WARNING
If your compiler does not support default template parameters, then you
need to always supply the Allocator template argument. For instance, you
will need to write :
vector<int, allocator<int> >
instead of :
vector<int>
SEE ALSO
function objects, unary_function
STANDARDS CONFORMANCE
ANSI X3J16/ISO WG21 Joint C++ Committee
privacy and legal statement