1 2 | template< class T >
struct negate;
|
| | (until C++14) |
1 2 | 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 std::negate when T is not specified, which leaves the parameter types and return type to be deduced.
| | function object implementing -x deducing argument and return types
(class template specialization) |
| (since C++14) |
Member types
| Type | Definition |
|---|
result_type | T |
argument_type | T |
Member functions
| | returns the negation of the argument
(public member function) |
std::negate::operator()
1 | T operator()( const T& arg ) const;
|
| | (until C++14) |
1 | 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
1 2 3 4 | constexpr T operator()(const T &arg) const
{
return -arg;
}
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