std::minus<void>
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Defined in header
<functional>
template<>
class minus<void>;
(since C++14)
class minus<void>;
std::minus <void> is a specialization of std::minus with parameter and return type deduced.
Contents
[edit] Member types
Type
Definition
is_transparent
unspecified
[edit] Member functions
operator()
(public member function)
std::minus<void>::operator()
template< class T, class U >
constexpr auto operator()( T&& lhs, U&& rhs ) const
Returns the difference of lhs and rhs.
Parameters
lhs, rhs
-
values to subtract
Return value
std::forward <T>(lhs) - std::forward <U>(rhs).
[edit] Example
Run this code
#include <complex> #include <functional> #include <iostream> int main() { auto complex_minus = std::minus <void>{}; // "void" can be omitted constexpr std::complex <int> z(4, 2); std::cout << complex_minus(z, 1) << '\n'; std::cout << (z - 1) << '\n'; }
Output:
(3,2) (3,2)