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    std::ratio_less_equal

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

    If the ratio R1 is less 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 > constexpr bool ratio_less_equal_v = ratio_less_equal<R1, R2>::value;
    		 (since C++17)
    [edit]

    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_less_equal<std::ratio<1, 2>, std::ratio<3, 4>>::value,
                  "1/2 <= 3/4");

    if (std::ratio_less_equal<std::ratio<10,11>, std::ratio<11,12>>::value)
        std::cout << "10/11 <= 11/12" "\n";

    static_assert(std::ratio_less_equal_v<std::ratio<10, 11>, std::ratio<11, 12>>);

    if constexpr (std::ratio_less_equal_v<std::ratio<10, 11>, std::ratio<11, 12>>)
        std::cout << "11/12 <= 12/13" "\n";
}

    Output: 

    10/11 <= 11/12
11/12 <= 12/13

    See also

    (C++11)
    		 compares two ratio objects for equality at compile-time
    (class template) [edit]
    (C++11)
    		 compares two ratio objects for inequality at compile-time
    (class template) [edit]