std::ratio_less

Since C++11

Header: <ratio>

If the ratio R1 is less than the ratio R2, provides the member constant value equal true. Otherwise, value is false.

# Declarations

template< class R1, class R2 >
struct ratio_less : std::integral_constant<bool, /* see below */> { };

(since C++11)

# Example

#include <iostream>
#include <ratio>
 
int main()
{
    using x = std::ratio<69, 90>;
    using y = std::ratio<70, 90>;
 
    if constexpr (std::ratio_less_v<x, y>)
        std::cout << x::num << '/' << x::den << " < "
                  << y::num << '/' << y::den << '\n';
}

# See also