std::ratio_not_equal
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ratio_not_equal
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Defined in header
<ratio>
template< class R1, class R2 >
struct ratio_not_equal : std::integral_constant <bool, /* see below */> { };
(since C++11)
struct ratio_not_equal : std::integral_constant <bool, /* see below */> { };
If the ratios R1 and R2 are not equal, provides the member constant value equal true. Otherwise, value is false.
Contents
[edit] Helper variable template
template< class R1, class R2 >
constexpr bool ratio_not_equal_v = ratio_not_equal<R1, R2>::value;
(since C++17)
constexpr bool ratio_not_equal_v = ratio_not_equal<R1, R2>::value;
Inherited from std::integral_constant
Member constants
value
[static]
(public static member constant)
Member functions
operator bool
(public member function)
operator()
(C++14)
(public member function)
Member types
Type
Definition
value_type
bool
type
std::integral_constant <bool, value>
[edit] Possible implementation
template< class R1, class R2 > struct ratio_not_equal : std::integral_constant < bool, !std::ratio_equal <R1, R2> > {};
[edit] Example
Run this code
#include <ratio> static_assert(std::ratio_not_equal_v<std::ratio <6, 9>, std::ratio <9, 6>>, "6/9 != 9/6"); int main() {}