inv_egamma

auto eve::inv_egamma = functor<inv_egamma_t>

inlineconstexpr

Defined in Header

#include <eve/module/math.hpp>

Callable Signatures

namespace eve
{
   template< eve::floating_value T >
   T inv_egamma(as<T> x) noexcept;
}

Parameters

• x : Type wrapper instance embedding the type of the constant.

Return value

The call eve::inv_egamma(as<T>()) returns the inverse of the [Euler-Mascheroni constant](eve::egamma).

Example

#include <eve/module/math.hpp>
#include <eve/wide.hpp>
#include <iostream>
#include <iomanip>
 
using wide_ft = eve::wide<float>;
 
template<typename T>
consteval auto constexpr_inv_egamma() { return eve::inv_egamma(eve::as<T>{}); }
 
int main()
{
 
  std::cout << "---- simd"  << std::setprecision(9) << std::endl
            << "-> inv_egamma(as<wide_ft>())                 = " << eve::inv_egamma(eve::as<wide_ft>())                << std::endl
            << "-> inv_egamma[upper](as<wide_ft>())         = " << eve::inv_egamma[eve::upper](eve::as<wide_ft>())   << std::endl
            << "-> inv_egamma[lower](as<wide_ft>())       = " << eve::inv_egamma[eve::lower](eve::as<wide_ft>()) << std::endl;
 
 
  std::cout << "---- scalar" << std::endl
            << "-> inv_egamma(as<float>())             = " << eve::inv_egamma(eve::as(float())) << std::endl;
 
 
  std::cout << "-> constexpr inv_egamma            = " << constexpr_inv_egamma<float>() << std::endl;
 
  return 0;
}