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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class static_string
  5. {
  6. 	const char* const p_;
  7. 	const std::size_t sz_;
  8.  
  9. public:
  10. 	typedef const char* const_iterator;
  11.  
  12. 	template <std::size_t N>
  13. 	constexpr static_string(const char(&a)[N]) noexcept
  14. 		: p_(a)
  15. 		, sz_(N - 1)
  16. 	{}
  17.  
  18. 	constexpr static_string(const char* p, std::size_t N) noexcept
  19. 		: p_(p)
  20. 		, sz_(N)
  21. 	{}
  22.  
  23. 	constexpr const char* data() const noexcept { return p_; }
  24. 	constexpr std::size_t size() const noexcept { return sz_; }
  25.  
  26. 	constexpr const_iterator begin() const noexcept { return p_; }
  27. 	constexpr const_iterator end()   const noexcept { return p_ + sz_; }
  28.  
  29. 	constexpr char operator[](std::size_t n) const
  30. 	{
  31. 		return n < sz_ ? p_[n] : throw std::out_of_range("static_string");
  32. 	}
  33. };
  34.  
  35. inline std::ostream& operator<<(std::ostream& os, static_string const& s)
  36. {
  37. 	return os.write(s.data(), s.size());
  38. }
  39.  
  40. /// \brief Get the name of a type
  41. template <class T>
  42. static_string typeName()
  43. {
  44. #ifdef __clang__
  45. 	static_string p = __PRETTY_FUNCTION__;
  46. 	return static_string(p.data() + 30, p.size() - 30 - 1);
  47. #elif defined(_MSC_VER)
  48. 	static_string p = __FUNCSIG__;
  49. 	return static_string(p.data() + 37, p.size() - 37 - 7);
  50. #endif
  51.  
  52. }
  53.  
  54. namespace details
  55. {
  56. 	template <class Enum>
  57. 	struct EnumWrapper
  58. 	{
  59. 		template < Enum enu >
  60. 		static static_string name()
  61. 		{
  62. #ifdef __clang__
  63. 			static_string p = __PRETTY_FUNCTION__;
  64. 			static_string enumType = typeName<Enum>();
  65. 			return static_string(p.data() + 73 + enumType.size(), p.size() - 73 - enumType.size() - 1);
  66. #elif defined(_MSC_VER)
  67. 			static_string p = __FUNCSIG__;
  68. 			static_string enumType = typeName<Enum>();
  69. 			return static_string(p.data() + 57 + enumType.size(), p.size() - 57 - enumType.size() - 7);
  70. #endif
  71. 		}
  72. 	};
  73. }
  74.  
  75. /// \brief Get the name of an enum value
  76. template <typename Enum, Enum enu>
  77. static_string enumName()
  78. {
  79. 	return details::EnumWrapper<Enum>::template name<enu>();
  80. }
  81.  
  82. enum class Color
  83. {
  84.     Blue = 0,
  85.     Yellow = 1
  86. };
  87.  
  88.  
  89. int main() 
  90. {
  91. 	std::cout << "_" << typeName<Color>() << "_"  << std::endl;
  92. 	std::cout << "_" << enumName<Color, Color::Blue>() << "_"  << std::endl;
  93. 	return 0;
  94. }
Success #stdin #stdout 0s 15240KB
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_Color_
_Color::Blue_
https://ideone.com/je5Quv
language:
C++14 (clang 8.0)
created:
6 years ago
visibility:
public

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