Difference between revisions of "cpp/numeric/ratio/ratio greater equal"
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| − | {{cpp/title | ratio_greater_equal}} | + | {{cpp/title|ratio_greater_equal}} |
{{cpp/numeric/ratio/navbar}} | {{cpp/numeric/ratio/navbar}} | ||
| − | {{ | + | {{ddcl|header=ratio|since=c++11|1= |
| − | + | ||
| − | + | ||
template< class R1, class R2 > | template< class R1, class R2 > | ||
| − | struct ratio_greater_equal : std::integral_constant; | + | struct ratio_greater_equal : std::integral_constant<bool, /* see below */> { }; |
}} | }} | ||
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| − | If the ratio {{tt|R1}} is greater than or equal to the ratio {{tt|R2}}, provides the member constant {{ | + | If the ratio {{tt|R1}} is greater than or equal to the ratio {{tt|R2}}, provides the member constant {{c|value}} equal {{c|true}}. Otherwise, {{c|value}} is {{c|false}}. |
| − | === Helper variable template === | + | ===Helper variable template=== |
| − | {{ddcl | since=c++17 | 1= | + | {{ddcl|since=c++17|1= |
template< class R1, class R2 > | template< class R1, class R2 > | ||
constexpr bool ratio_greater_equal_v = ratio_greater_equal<R1, R2>::value; | constexpr bool ratio_greater_equal_v = ratio_greater_equal<R1, R2>::value; | ||
}} | }} | ||
| − | {{cpp/types/integral_constant/inherit | {{c|1=R1::num * R2::den >= R2::num * R1::den}}, or equivalent expression that avoids overflow }} | + | {{cpp/types/integral_constant/inherit|{{c|1=R1::num * R2::den >= R2::num * R1::den}}, or equivalent expression that avoids overflow}} |
===Example=== | ===Example=== | ||
| − | {{example | + | {{example |
| − | + | |code= | |
| − | + | #include <ratio> | |
| + | |||
| + | int main() | ||
| + | { | ||
| + | static_assert(std::ratio_greater_equal< | ||
| + | std::ratio<2, 3>, | ||
| + | std::ratio<2, 3>>::value, "2/3 >= 2/3"); | ||
| + | |||
| + | // since C++17 | ||
| + | static_assert(std::ratio_greater_equal_v< | ||
| + | std::ratio<999'998, 999'999>, | ||
| + | std::ratio<999'997, 999'998>>); | ||
| + | } | ||
}} | }} | ||
===See also=== | ===See also=== | ||
{{dsc begin}} | {{dsc begin}} | ||
| − | {{dsc inc | cpp/ | + | {{dsc inc|cpp/numeric/ratio/dsc ratio_equal}} |
| + | {{dsc inc|cpp/numeric/ratio/dsc ratio_less}} | ||
{{dsc end}} | {{dsc end}} | ||
| − | + | {{langlinks|de|es|fr|it|ja|pt|ru|zh}} | |
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Latest revision as of 15:05, 24 September 2024
| Defined in header <ratio>
|
||
| template< class R1, class R2 > struct ratio_greater_equal : std::integral_constant<bool, /* see below */> { }; |
(since C++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.
Contents |
[edit] Helper variable template
| template< class R1, class R2 > constexpr bool ratio_greater_equal_v = ratio_greater_equal<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
Run this code
#include <ratio> int main() { static_assert(std::ratio_greater_equal< std::ratio<2, 3>, std::ratio<2, 3>>::value, "2/3 >= 2/3"); // since C++17 static_assert(std::ratio_greater_equal_v< std::ratio<999'998, 999'999>, std::ratio<999'997, 999'998>>); }
[edit] See also
| (C++11) |
compares two ratio objects for equality at compile-time (class template) |
| (C++11) |
compares two ratio objects for less than at compile-time (class template) |
