std:: ratio_greater

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ratio_greater
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Defined in header <ratio>
template < class R1, class R2 >
struct ratio_greater : std:: integral_constant < bool , /* see below */ > { } ;
(since C++11)

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

Helper variable template

template < class R1, class R2 >
constexpr bool ratio_greater_v = ratio_greater < R1, R2 > :: value ;
(since C++17)

Inherited from std:: integral_constant

Member constants

value
[static]
true if R1 :: num * R2 :: den > R2 :: num * R1 :: den , or equivalent expression that avoids overflow, 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 >

Example

Run this code 
#include <iostream>
#include <ratio>
 
int main()
{
    static_assert(std::ratio_greater<std::ratio<3, 4>, std::ratio<1, 2>>::value,
                  "3/4 > 1/2");
 
    if (std::ratio_greater<std::ratio<11, 12>, std::ratio<10, 11>>::value)
        std::cout << "11/12 > 10/11" "\n";
 
    // Since C++17
    static_assert(std::ratio_greater_v<std::ratio<12, 13>, std::ratio<11, 12>>);
 
    if constexpr (std::ratio_greater_v<std::ratio<12, 13>, std::ratio<11, 12>>)
        std::cout << "12/13 > 11/12" "\n";
}

Output: 

11/12 > 10/11
12/13 > 11/12

See also

(C++11)
compares two ratio objects for greater than or equal to at compile-time
(class template)
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