std::minus(3) | C++ Standard Libary | std::minus(3) |
NAME¶
std::minus - std::minus
Synopsis¶
Defined in header <functional>
template< class T > (until C++14)
struct minus;
template< class T = void > (since C++14)
struct minus;
Function object for performing subtraction. Effectively calls operator- on
two
instances of type T.
Specializations¶
The standard library provides a specialization of std::minus when
T is
not specified, which leaves the parameter types and return type to be
deduced.
(since C++14)
minus<void> function object implementing x - y deducing argument and
(C++14) return types
(class template specialization)
Member types¶
Type Definition
result_type (deprecated in C++17)(removed in C++20) T
first_argument_type (deprecated in C++17)(removed in C++20) T
second_argument_type (deprecated in C++17)(removed in C++20) T
These member types are obtained via publicly inheriting (until C++11)
std::binary_function<T, T, 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¶
May throw implementation-defined exceptions.
Possible implementation¶
constexpr T operator()(const T &lhs, const T &rhs) const
{
return lhs - rhs;
}
2022.07.31 | http://cppreference.com |