std::negate
From cppreference.com
< cpp | utility | functional
| Defined in header <functional>
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| template< class T > struct negate; |
(until C++14) | |
| template< class T = void > struct negate; |
(since C++14) | |
Function object for performing negation. Effectively calls operator- on an instance of type T.
Specializations
|
The standard library provides a specialization of
|
(since C++14) |
Member types
| Type | Definition |
result_type(deprecated in C++17)
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T
|
argument_type(deprecated in C++17)
|
T
|
Member functions
| operator() |
returns the negation of the argument (public member function) |
std::negate::operator()
| T operator()( const T& arg ) const; |
(until C++14) | |
| constexpr T operator()( const T& arg ) const; |
(since C++14) | |
Returns the negation of arg.
Parameters
| arg | - | value to compute negation of |
Return value
The result of -arg.
Exceptions
(none)
Possible implementation
constexpr T operator()(const T &arg) const { return -arg; } |