constants.hpp

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#ifndef VIENNASHE_MATH_CONSTANTS_HPP
#define VIENNASHE_MATH_CONSTANTS_HPP
 
/* ============================================================================
   Copyright (c) 2011-2022, Institute for Microelectronics,
                            Institute for Analysis and Scientific Computing,
                            TU Wien.
 
                            -----------------
     ViennaSHE - The Vienna Spherical Harmonics Expansion Boltzmann Solver
                            -----------------
 
                    http://viennashe.sourceforge.net/
 
   License:         MIT (X11), see file LICENSE in the base directory
=============================================================================== */
 
namespace viennashe
{
  namespace math
  {
    namespace detail
    {
      template <bool dummy = true>  //template argument in order to control linkage
      struct constants
      {
        static const double pi;
 
        static const double e;
 
      };
 
      template <bool b>
      const double constants<b>::pi = 3.1415926535897932384626433832795; // 1
 
      template <bool b>
      const double constants<b>::e  = 2.718281828459045235360287471352; // 1
    }
 
    typedef detail::constants<>   constants;
 
  } //namespace math
} //namespace viennashe
#endif