std::ratio_greater
From cppreference.com
| 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.
Helper variable template
template< class R1, class R2 >
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>
|
Example
Run this code
#include <iostream>
#include <ratio>
int main()
{
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