rat

eve::rat = functor<rat_t>

inlineconstexpr

Header file

#include <eve/module/core.hpp>

Callable Signatures

namespace eve
{
   // Regular overloads
   constexpr auto rat(floating_value auto x)                           noexcept;
   constexpr auto rat(floating_value auto x, floating_value auto tol)  noexcept;
}

Parameters

• x : argument.
• tol: floating value. By default tol is equal to 1.0e-6*eveabs(x).

Return value

A tuple-like whose members have the same type as x, containing the numerator and denominator of the rational number approximating x.

Example

// revision 0
#include <eve/module/core.hpp>
#include <iostream>
 
int main()
{
  eve::wide wf0{0.0, 1.0, 2.0, 3.0, -1.0, -2.0, -3.0, -4.0};
  eve::wide wf1{0.0, -4.0, 1.0, -1.0, 2.0, -2.0, 3.0, -3.0};
 
  std::cout << "<- wf0           = " << wf0 << "\n";
  std::cout << "<- wf1           = " << wf1 << "\n";
                                 
  std::cout << "-> rat(wf0)      = " << eve::rat(wf0) << "\n";
  std::cout << "-> rat(wf0, wf1) = " << eve::rat(wf0, wf1) << "\n";
}