Namespaces
Variants
Views
Actions

std::ratio_greater

From cppreference.com
< cpp‎ | numeric‎ | ratio
 
 
 
Compile time rational arithmetic
(C++11)
Arithmetic
(C++11)
Comparison
(C++11)
ratio_greater
(C++11)
 
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.

Contents

[edit] Helper variable template

template< class R1, class R2 >
inline 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>

[edit] Example

#include <ratio>
#include <iostream>
 
auto main() -> int
{
    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

[edit] See also