math_constants.h

/******************************************************************************
The MIT License(MIT)
 
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
 
Copyright(c) 2018 John Wellbelove
 
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#ifndef ETL_MATH_CONSTANTS_INCLUDED
#define ETL_MATH_CONSTANTS_INCLUDED
 
#include "platform.h"
 
#include "private/diagnostic_gnu_static_float_init_push.h"
 
namespace etl
{
  namespace private_math_constants
  {
    template <typename T = void>
    struct math_helper
    {
      static ETL_CONSTANT double pi               = 3.14159265358979;
      static ETL_CONSTANT double pi_reciprocal    = 0.31830988618379;
      static ETL_CONSTANT double pi_squared       = 9.86960440108936;
      static ETL_CONSTANT double e                = 2.71828182845905;
      static ETL_CONSTANT double e_reciprocal     = 0.36787944117144;
      static ETL_CONSTANT double e_squared        = 7.38905609893065;
      static ETL_CONSTANT double root2            = 1.41421356237310;
      static ETL_CONSTANT double root2_reciprocal = 0.70710678118655;
      static ETL_CONSTANT double euler            = 0.57721566490153;
      static ETL_CONSTANT double golden_ratio     = 1.61803398874989;
    };
 
    template <typename T>
    ETL_CONSTANT double math_helper<T>::pi;
 
    template <typename T>
    ETL_CONSTANT double math_helper<T>::pi_reciprocal;
 
    template <typename T>
    ETL_CONSTANT double math_helper<T>::pi_squared;
 
    template <typename T>
    ETL_CONSTANT double math_helper<T>::e;
 
    template <typename T>
    ETL_CONSTANT double math_helper<T>::e_reciprocal;
 
    template <typename T>
    ETL_CONSTANT double math_helper<T>::e_squared;
 
    template <typename T>
    ETL_CONSTANT double math_helper<T>::root2;
 
    template <typename T>
    ETL_CONSTANT double math_helper<T>::root2_reciprocal;
 
    template <typename T>
    ETL_CONSTANT double math_helper<T>::euler;
 
    template <typename T>
    ETL_CONSTANT double math_helper<T>::golden_ratio;
  } // namespace private_math_constants
 
  struct math : public private_math_constants::math_helper<>
  {
  };
} // namespace etl
 
#include "private/diagnostic_pop.h"
 
#endif