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

| | | | | --------------------------------------------------------------------------------------------------------------------------------------------------------- | | ------------- | | template< class R1, class R2 > struct ratio_not_equal : std::integral_constant<bool, /* see below */> { }; | | (since C++11) |

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

Contents

• 1 Helper variable template
• 2 Inherited from std::integral_constant
  • 2.1 Member constants
  • 2.2 Member functions
  • 2.3 Member types
  • 2.4 Possible implementation
  • 2.5 Example
  • 2.6 See also

[edit] Helper variable template

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

Inherited from std::integral_constant

Member constants

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

Member functions

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

Member types

[edit] Possible implementation

[edit] Example

#include   static_assert(std::ratio_not_equal_v<std::ratio<6, 9>, std::ratio<9, 6>>, "6/9 != 9/6");   int main() {}

[edit] See also

| | compares two ratio objects for equality at compile-time (class template) [edit] | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |