libcxx/include/numbers

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_NUMBERS
#define _LIBCPP_NUMBERS

/*
    numbers synopsis

namespace std::numbers {
  template<class T> inline constexpr T e_v          = unspecified;
  template<class T> inline constexpr T log2e_v      = unspecified;
  template<class T> inline constexpr T log10e_v     = unspecified;
  template<class T> inline constexpr T pi_v         = unspecified;
  template<class T> inline constexpr T inv_pi_v     = unspecified;
  template<class T> inline constexpr T inv_sqrtpi_v = unspecified;
  template<class T> inline constexpr T ln2_v        = unspecified;
  template<class T> inline constexpr T ln10_v       = unspecified;
  template<class T> inline constexpr T sqrt2_v      = unspecified;
  template<class T> inline constexpr T sqrt3_v      = unspecified;
  template<class T> inline constexpr T inv_sqrt3_v  = unspecified;
  template<class T> inline constexpr T egamma_v     = unspecified;
  template<class T> inline constexpr T phi_v        = unspecified;

  template<floating_point T> inline constexpr T e_v<T>          = see below;
  template<floating_point T> inline constexpr T log2e_v<T>      = see below;
  template<floating_point T> inline constexpr T log10e_v<T>     = see below;
  template<floating_point T> inline constexpr T pi_v<T>         = see below;
  template<floating_point T> inline constexpr T inv_pi_v<T>     = see below;
  template<floating_point T> inline constexpr T inv_sqrtpi_v<T> = see below;
  template<floating_point T> inline constexpr T ln2_v<T>        = see below;
  template<floating_point T> inline constexpr T ln10_v<T>       = see below;
  template<floating_point T> inline constexpr T sqrt2_v<T>      = see below;
  template<floating_point T> inline constexpr T sqrt3_v<T>      = see below;
  template<floating_point T> inline constexpr T inv_sqrt3_v<T>  = see below;
  template<floating_point T> inline constexpr T egamma_v<T>     = see below;
  template<floating_point T> inline constexpr T phi_v<T>        = see below;

  inline constexpr double e          = e_v<double>;
  inline constexpr double log2e      = log2e_v<double>;
  inline constexpr double log10e     = log10e_v<double>;
  inline constexpr double pi         = pi_v<double>;
  inline constexpr double inv_pi     = inv_pi_v<double>;
  inline constexpr double inv_sqrtpi = inv_sqrtpi_v<double>;
  inline constexpr double ln2        = ln2_v<double>;
  inline constexpr double ln10       = ln10_v<double>;
  inline constexpr double sqrt2      = sqrt2_v<double>;
  inline constexpr double sqrt3      = sqrt3_v<double>;
  inline constexpr double inv_sqrt3  = inv_sqrt3_v<double>;
  inline constexpr double egamma     = egamma_v<double>;
  inline constexpr double phi        = phi_v<double>;
}
*/

#include <__concepts/arithmetic.h>
#include <__config>
#include <version>

#if _LIBCPP_STD_VER >= 20

#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#    pragma GCC system_header
#  endif

_LIBCPP_BEGIN_NAMESPACE_STD

namespace numbers {

template <class _Tp>
inline constexpr bool __false = false;

template <class _Tp>
struct __illformed {
  static_assert(
      __false<_Tp>,
      "A program that instantiates a primary template of a mathematical constant variable template is ill-formed.");
};

template <class _Tp>
inline constexpr _Tp e_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp log2e_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp log10e_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp pi_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp inv_pi_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp inv_sqrtpi_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp ln2_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp ln10_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp sqrt2_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp sqrt3_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp inv_sqrt3_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp egamma_v = __illformed<_Tp>{};
template <class _Tp>
inline constexpr _Tp phi_v = __illformed<_Tp>{};

template <floating_point _Tp>
inline constexpr _Tp e_v<_Tp> = 2.718281828459045235360287471352662;
template <floating_point _Tp>
inline constexpr _Tp log2e_v<_Tp> = 1.442695040888963407359924681001892;
template <floating_point _Tp>
inline constexpr _Tp log10e_v<_Tp> = 0.434294481903251827651128918916605;
template <floating_point _Tp>
inline constexpr _Tp pi_v<_Tp> = 3.141592653589793238462643383279502;
template <floating_point _Tp>
inline constexpr _Tp inv_pi_v<_Tp> = 0.318309886183790671537767526745028;
template <floating_point _Tp>
inline constexpr _Tp inv_sqrtpi_v<_Tp> = 0.564189583547756286948079451560772;
template <floating_point _Tp>
inline constexpr _Tp ln2_v<_Tp> = 0.693147180559945309417232121458176;
template <floating_point _Tp>
inline constexpr _Tp ln10_v<_Tp> = 2.302585092994045684017991454684364;
template <floating_point _Tp>
inline constexpr _Tp sqrt2_v<_Tp> = 1.414213562373095048801688724209698;
template <floating_point _Tp>
inline constexpr _Tp sqrt3_v<_Tp> = 1.732050807568877293527446341505872;
template <floating_point _Tp>
inline constexpr _Tp inv_sqrt3_v<_Tp> = 0.577350269189625764509148780501957;
template <floating_point _Tp>
inline constexpr _Tp egamma_v<_Tp> = 0.577215664901532860606512090082402;
template <floating_point _Tp>
inline constexpr _Tp phi_v<_Tp> = 1.618033988749894848204586834365638;

inline constexpr double e          = e_v<double>;
inline constexpr double log2e      = log2e_v<double>;
inline constexpr double log10e     = log10e_v<double>;
inline constexpr double pi         = pi_v<double>;
inline constexpr double inv_pi     = inv_pi_v<double>;
inline constexpr double inv_sqrtpi = inv_sqrtpi_v<double>;
inline constexpr double ln2        = ln2_v<double>;
inline constexpr double ln10       = ln10_v<double>;
inline constexpr double sqrt2      = sqrt2_v<double>;
inline constexpr double sqrt3      = sqrt3_v<double>;
inline constexpr double inv_sqrt3  = inv_sqrt3_v<double>;
inline constexpr double egamma     = egamma_v<double>;
inline constexpr double phi        = phi_v<double>;

} // namespace numbers

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP_STD_VER >= 20

#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
#  include <concepts>
#  include <type_traits>
#endif

#endif // _LIBCPP_NUMBERS