Std::ratio_less (3) Linux Manual Page

std::ratio_less – std::ratio_less

Synopsis

Defined in header<ratio>

    template <class R1, class R2>
    (since C++ 11)

        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 >                                   (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 that avoids overflow , false otherwise
(public static member constant)
[static]

Member functions

converts the object to bool, returns value
operator bool (public member function)

operator() returns value
(public member function)
(C++14)

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

std::ratio_less (3) Linux Manual Page