std::ratio_not_equal - cppreference.com

From cppreference.com


`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.

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

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

#include <ratio>

static_assert(std::ratio_not_equal_v<std::ratio<6, 9>, std::ratio<9, 6>>, "6/9 != 9/6");

int main() {}