std::ratio_equal
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Template:cpp/numeric/ratio/sidebar Template:ddcl list begin <tr class="t-dsc-header">
<td>Defined in header
</td>
<ratio>
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<td class="t-dcl-nopad">template< class R1, class R2 >
struct ratio_equal : std::integral_constant;
</td>
struct ratio_equal : std::integral_constant;
<td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> Template:ddcl list end
If the ratios R1 and R2 are equal, provides the member constant value equal true. Otherwise, value is false.
Contents |
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
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
