NAME¶

std::ratio_not_equal - std::ratio_not_equal

Synopsis¶

Defined in header <ratio>
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 >
inline constexpr bool ratio_not_equal_v = ratio_not_equal<R1, (since C++17)
R2>::value;

Inherited from std::integral_constant

Member constants¶

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

Member functions¶

operator bool converts the object to bool, returns value
(public member function)
operator() returns value
(C++14) (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¶

// 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

See also¶