logical_not<T>


Category: functors 
Component type: type 
Description
Logical_not<T> is a function object; specifically, it is an
Adaptable Predicate, which means it is a function
object that tests the truth or falsehood of some condition.
If f is an object of class logical_not<T>
and x is an object of class T (where T is convertible
to bool) then f(x) returns true if and only if x
is false.
Example
Transforms a vector of bool into its logical complement.
vector<bool> V;
...
transform(V.begin(), V.end(), V.begin(), logical_not<bool>());
Definition
Defined in the standard header functional, and in the nonstandard
backwardcompatibility header function.h.
Template parameters
Parameter

Description

Default

T

The type of logical_not's argument


Model of
Adaptable Predicate, DefaultConstructible
Type requirements
T must be convertible to bool.
Public base classes
unary_function<T, bool>
Members
Notes
See also
The function object overview, logical_or, logical_and.
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