Defined in header <ratio> | ||
---|---|---|
template< class R1, class R2 > struct ratio_less : std::integral_constant; |
If the ratio R1 is less than the ratio R2, provides the member constant value
equal true
. Otherwise, value
is false
.
Helper variable template
template< class R1, class R2 > constexpr bool ratio_less_v = ratio_less<R1, R2>::value; | (since C++17) |
Inherited from std::integral_constant
Member constants
value [static] | true if R1::num * R2::den < R2::num * R1::den , or equivalent expression that avoids overflow , 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> |
Example
#include <iostream> #include <ratio> int main() { if (std::ratio_less<std::ratio<23,37>, std::ratio<57,90>>::value) { std::cout << "23/37 < 57/90\n"; } }
Output:
23/37 < 57/90
See also
std::experimental::ratio_less_v
(library fundamentals TS) | variable template alias of std::ratio_less::value (variable template) |
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