std::ratio_equal
From cppreference.com
Defined in header <ratio>
|
||
template< class R1, class R2 > struct ratio_equal : std::integral_constant; |
(since C++11) | |
If the ratios R1 and R2 are equal, provides the member constant value
equal true. Otherwise, value
is false.
Helper variable template
template< class R1, class R2 > inline constexpr bool ratio_equal_v = ratio_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_equal : public std::integral_constant < bool, R1::num == R2::num && R1::den == R2::den > {}; |
Example
Run this code
#include <iostream> #include <ratio> int main() { if(std::ratio_equal<std::ratio<2,3>, std::ratio<4,6>>::value) { std::cout << "2/3 == 4/6\n"; } else { std::cout << "2/3 != 4/6\n"; } }
Output:
2/3 == 4/6