class template
<ratio>

std::ratio_not_equal

template <class R1, class R2> ratio_not_equal;
Compare ratios for inequality
This type inherits from the appropriate integral_constant type (either true_type or false_type) to signal whether R1 compares not equal to R2
The resulting type is the same as if ratio_not_equal was defined as:
1
2
template <class R1, class R2>
struct ratio_not_equal : integral_constant < bool, !ratio_equal<R1,R2>::value > {};


Template parameters

R1,R2
ratio types to be compared.

Member constants

Inherited from integral_constant:
member constantdefinition
valueeither true or false

Member types

Inherited from integral_constant:
member typedefinition
value_typebool
typeeither true_type or false_type

Example

1
2
3
4
5
6
7
8
9
10
11
12
13
14
// ratio_not_equal example
#include <iostream>
#include <ratio>

int main ()
{
  typedef std::ratio<1,2> one_half;
  typedef std::ratio<2,4> two_fourths;

  std::cout << "1/2 != 2/4 ? " << std::boolalpha;
  std::cout << std::ratio_not_equal<one_half,two_fourths>::value << std::endl;

  return 0;
}


Output:
1/2 != 2/4 ? false

See also