table of contents
std::ratio_less(3) | C++ Standard Libary | std::ratio_less(3) |
NAME¶
std::ratio_less - std::ratio_less
Synopsis¶
Defined in header <ratio>
template< class R1, class R2 >
struct ratio_less : std::integral_constant<bool, /* see below */> {
(since C++11)
};
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 > (since C++17)
inline constexpr bool ratio_less_v = ratio_less<R1, R2>::value;
Inherited from std::integral_constant
Member constants¶
value true if R1::num * R2::den < R2::num * R1::den, or
equivalent expression
[static] that avoids overflow , false otherwise
(public static member constant)
Member functions¶
operator bool converts the object to bool, returns value
(public member function)
operator() returns value
(C++14) (public member function)
Member types¶
Type Definition
value_type bool
type std::integral_constant<bool, value>
Example¶
// Run this code
#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¶
2022.07.31 | http://cppreference.com |