std::minus
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Defined in header
<functional>
template< class T >
struct minus;
(until C++14)
struct minus;
template< class T = void >
struct minus;
(since C++14)
struct minus;
Function object for performing subtraction. Effectively calls operator- on two instances of type T.
Contents
[edit] 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.
(C++14)
(class template specialization) [edit]
[edit] 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 std::binary_function <T, T, T>.
(until C++11)[edit] Member functions
operator()
(public member function)
std::minus::operator()
T operator()( const T& lhs, const T& rhs ) const;
(constexpr 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.
[edit] Exceptions
May throw implementation-defined exceptions.
Possible implementation
constexpr T operator()(const T& lhs, const T& rhs) const { return lhs - rhs; }