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

If the ratio R1 is greater than the ratio R2, 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 Example
  • 2.5 See also

[edit] Helper variable template

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

Inherited from std::integral_constant

Member constants

| | true if R1::num * R2::den > R2::num * R1::den, or equivalent expression that avoids overflow, 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] Example

#include #include   int main() { static_assert(std::ratio_greater<std::ratio<3, 4>, std::ratio<1, 2>>::value, "3/4 > 1/2");   if (std::ratio_greater<std::ratio<11, 12>, std::ratio<10, 11>>::value) std::cout << "11/12 > 10/11" "\n";   // Since C++17 static_assert(std::ratio_greater_v<std::ratio<12, 13>, std::ratio<11, 12>>);   if constexpr (std::ratio_greater_v<std::ratio<12, 13>, std::ratio<11, 12>>) std::cout << "12/13 > 11/12" "\n"; }

Output:

11/12 > 10/11 12/13 > 11/12

[edit] See also