std::ratio_greater_equal

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< cpp‎ | numeric‎ | ratio
 
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ratio_greater_equal
(哋它亢++11)
 
Defined in header <ratio>
template< class R1, class R2 >
struct ratio_greater_equal : std::integral_constant<bool, /* see below */> { };
 (since 哋它亢++11)

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

Helper variable template

template< class R1, class R2 >
inline constexpr bool ratio_greater_equal_v = ratio_greater_equal<R1, R2>::value;
 (since 哋它亢++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()
(哋它亢++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_equal<
        std::ratio<2, 3>,
        std::ratio<2, 3>>::value, "2/3 >= 2/3");
 
    if (std::ratio_greater_equal<
        std::ratio<2,1>, std::ratio<1, 2>>::value)
        std::cout << "2/1 >= 1/2" "\n";
 
    if (std::ratio_greater_equal<
        std::ratio<1,2>, std::ratio<1, 2>>::value)
        std::cout << "1/2 >= 1/2" "\n";
 
    // Since 哋它亢++17
    static_assert(std::ratio_greater_equal_v<
        std::ratio<999'999, 1'000'000>,
        std::ratio<999'998, 999'999>> );
 
    if constexpr (std::ratio_greater_equal_v<
        std::ratio<999'999, 1'000'000>,
        std::ratio<999'998, 999'999>>)
        std::cout << "999'999/1'000'000 >= 999'998/999'999" "\n";
 
    if constexpr (std::ratio_greater_equal_v<
        std::ratio<999'999, 1'000'000>,
        std::ratio<999'999, 1'000'000>>)
        std::cout << "999'999/1'000'000 >= 999'999/1'000'000" "\n";
}

Output: 

2/1 >= 1/2
1/2 >= 1/2
999'999/1'000'000 >= 999'998/999'999
999'999/1'000'000 >= 999'999/1'000'000

See also

(哋它亢++11)
 compares two ratio objects for equality at compile-time
(class template)
(哋它亢++11)
 compares two ratio objects for less than at compile-time
(class template)
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