| Defined in header <functional> | ||
|---|---|---|
template< class T > struct minus; | (until C++14) | |
template< class T = void > struct minus; | (since C++14) |
Function object for performing subtraction. Effectively calls operator- on two instances of type T.
Specializations
| The standard library provides a specialization of
| (since C++14) |
Member types
| Type | Definition |
|---|---|
result_type | T |
first_argument_type | T |
second_argument_type | T |
Member functions
| operator() | returns the difference between two arguments (public member function) |
std::minus::operator()
T operator()( const T& lhs, const T& rhs ) const; | (until C++14) | |
constexpr T operator()( const T& lhs, const T& rhs ) const; | (since C++14) |
Returns the difference between lhs and rhs.
Parameters
| lhs, rhs | - | values to subtract from one another |
Return value
The result of lhs - rhs.
Exceptions
(none).
Possible implementation
constexpr T operator()(const T &lhs, const T &rhs) const
{
return lhs - rhs;
} |
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