| Defined in header <functional> | ||
|---|---|---|
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 | T |
argument_type | 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;
} |
Please login to continue.