std::ratio_not_equal (3) - Linux Manuals

std::ratio_not_equal: std::ratio_not_equal

NAME

std::ratio_not_equal - std::ratio_not_equal

Synopsis

Defined in header <ratio>
template< class R1, class R2 > (since C++11)
struct ratio_not_equal : std::integral_constant;

If the ratios R1 and R2 are not equal, provides the member constant value equal true. Otherwise, value is false.

Helper variable template

template< class R1, class R2 > (since C++17)
inline constexpr bool ratio_not_equal_v = ratio_not_equal<R1, R2>::value;

Inherited from std::integral_constant

Member constants

value true if R1::num != R2::num || R1::den != R2::den , false otherwise
         (public static member constant)
[static]

Member functions

              converts the object to bool, returns value
operator bool (public member function)

operator() returns value
              (public member function)
(C++14)

Member types

Type Definition
value_type bool
type std::integral_constant<bool, value>

Possible implementation

  template< class R1, class R2 >
  struct ratio_not_equal : std::integral_constant <
                                bool,
                                !std::ratio_equal<R1, R2>
                           > {};

Example

// Run this code

  #include <iostream>
  #include <ratio>

  int main()
  {
      if(std::ratio_not_equal<std::ratio<2,3>, std::ratio<1,3>>::value) {
          std::cout << "2/3 != 1/3\n";
      } else {
          std::cout << "2/3 == 1/3\n";
      }
  }

Output:

  2/3 != 1/3