Difference between revisions of "cpp/numeric/ratio/ratio not equal"
From cppreference.com
(+_v) |
m (Text replace - "constexpr bool" to "inline constexpr bool") |
||
| Line 14: | Line 14: | ||
{{ddcl | since=c++17 | 1= | {{ddcl | since=c++17 | 1= | ||
template< class R1, class R2 > | template< class R1, class R2 > | ||
| − | constexpr bool ratio_not_equal_v = ratio_not_equal<R1, R2>::value; | + | inline constexpr bool ratio_not_equal_v = ratio_not_equal<R1, R2>::value; |
}} | }} | ||
Revision as of 04:36, 14 March 2017
| Defined in header <ratio>
|
||
| template< class R1, class R2 > struct ratio_not_equal : std::integral_constant; |
||
If the ratios R1 and R2 are not equal, provides the member constant value equal true. Otherwise, value is false.
Contents |
Helper variable template
| template< class R1, class R2 > inline 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
|
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
| (library fundamentals TS) |
variable template alias of std::ratio_not_equal::value (variable template) |
