std::ratio_less_equal
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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)
struct ratio_less_equal : std::integral_constant <bool, /* see below */> { };
If the ratio R1 is less than or equal to the ratio R2, provides the member constant value equal true. Otherwise, value is false.
Contents
[edit] Helper variable template
template< class R1, class R2 >
constexpr bool ratio_less_equal_v = ratio_less_equal<R1, R2>::value;
(since C++17)
constexpr bool ratio_less_equal_v = ratio_less_equal<R1, R2>::value;
Inherited from std::integral_constant
Member constants
value
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(public static member constant)
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operator bool
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(public member function)
Member types
Type
Definition
value_type
bool
type
std::integral_constant <bool, value>
[edit] 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