std::minus - cppreference.com (original) (raw)

| | | | | ------------------------------ | | ------------- | | template<> class minus<void>; | | (since C++14) |

std::minus<void> is a specialization of std::minus with parameter and return type deduced.

Contents

• 1 Member types
• 2 Member functions
• 3 std::minus::operator()
  • 3.1 Parameters
  • 3.2 Return value
  • 3.3 Example

[edit] Member types

[edit] Member functions

| | returns the difference of two arguments (public member function) | | ------------------------------------------------------------------- |

std::minus::operator()

| template< class T, class U > constexpr auto operator()( T&& lhs, U&& rhs ) const -> decltype(std::forward<T>(lhs) - std::forward<U>(rhs)); | | | | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | |

Returns the difference of lhs and rhs.

Parameters

Return value

std::forward<T>(lhs) - std::forward<U>(rhs).

[edit] Example

#include #include #include   int main() { auto complex_minus = std::minus{}; // “void” can be omitted constexpr std::complex z(4, 2); std::cout << complex_minus(z, 1) << '\n'; std::cout << (z - 1) << '\n'; }

Output: