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negate<T>


Category: functors 
Component type: type 
Description
Negate<T> is a function object. Specifically, it is an
Adaptable Unary Function. If f is an object of class
negate<T> and x is an object of class T, then
f(x) returns x.
Example
Each element in V2 will be the negative (additive inverse)
of the corresponding element in V1.
const int N = 1000;
vector<double> V1(N);
vector<double> V2(N);
iota(V1.begin(), V1.end(), 1);
assert(V2.size() >= V1.size());
transform(V1.begin(), V1.end(), V2.begin(),
negate<int>());
Definition
Defined in the standard header functional, and in the nonstandard
backwardcompatibility header function.h.
Template parameters
Parameter

Description

Default

T

The function object's argument type and result type.


Model of
Adaptable Unary Function, Default Constructible
Type requirements
T must be a numeric type; if x is an object of type T,
then x must be defined and must have a return type that is
convertible to T. T must be Assignable.
Public base classes
unary_function<T, T>
Members
New members
All of negate's members are defined in the
Adaptable Unary Function and
Default Constructible
requirements. Negate does not introduce any new members.
Notes
See also
The Function Object overview,
Adaptable Unary Function,
unary_function,
plus,
minus,
multiplies,
divides,
modulus
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