Standard Template Library Programmer's Guide

New members

All of modulus's members are defined in the Adaptable Binary Function and Default Constructible requirements. Modulus does not introduce any new members.

See also

The Function Object overview, Adaptable Binary Function, binary_function, plus, minus, multiplies, divides, negate

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 backward-compatibility header function.h.

Template parameters

Parameter	Description
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

Member	Where defined	Description
argument_type	Adaptable Unary Function	The type of the second argument: T
result_type	Adaptable Unary Function	The type of the result: T
T operator()(const T& x)	Adaptable Unary Function	Function call operator. The return value is -x.
negate()	Default Constructible	The default constructor.

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.

See also

The Function Object overview, Adaptable Unary Function, unary_function, plus, minus, multiplies, divides, modulus

Comparisons

equal_to<T>

Category: functors

Component type: type

Description