std::ratio_not_equal
From cppreference.com
| Defined in header <ratio>
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| template< class R1, class R2 > struct ratio_not_equal : std::integral_constant; |
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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) | |
Inherited from std::integral_constant
Member constants
| value [static] |
true if R1::num != R2::num || R1::den != R2::den , false otherwise (public static member constant) |
Member functions
| operator bool |
converts the object to bool, returns value (public member function) |
| operator() (C++14) |
returns value (public member function) |
Member types
| Type | Definition |
value_type
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bool
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type
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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 <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
[edit] See also
| (library fundamentals TS) |
variable template alias of std::ratio_not_equal::value (variable template) |
