enum.hpp File Reference

enum utilities More...

#include <ostream>
#include <array>
#include <ranges>
#include <type_traits>
#include <string_view>

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Classes
class	enum_detail::split< String, Delim >

Macros
#define	PENUM(NAME, ...)
	Create a printable enum class.

Functions
template<typename E >
constexpr auto	to_underlying (E e) noexcept

Detailed Description

enum utilities

Author

Tim Luchterhand

Date

04.10.24

Macro Definition Documentation

PENUM

#define PENUM	(		NAME,
			...
	)

Value:

enum class NAME { __VA_ARGS__ };                                                       \
inline constexpr std::string_view __##NAME##_enum_str_vals__ = #__VA_ARGS__;                                    \
inline constexpr std::array __##NAME##_converter__{enum_detail::split<__##NAME##_enum_str_vals__, ','>::value };\
inline std::ostream &operator<<(std::ostream &os, NAME e) {                                                     \
    os << __##NAME##_converter__.at(to_underlying(e));                                                          \
    return os;                                                                                                  \
}                                                                                                               \
inline auto to_string(NAME e) {                                                                                 \
    return std::string(__##NAME##_converter__.at(to_underlying(e)));                                            \
}

Create a printable enum class.

specify the enum class name first and then an arbitrary number of entries.

Parameters

NAME	enum class name
VA_ARGS	arbitrary number of enum entries

Function Documentation

to_underlying()

template<typename E >

constexpr auto to_underlying ( E  e )

constexprnoexcept

Converts enum to underlying type

Template Parameters

E

enum type

Parameters

e	enum to convert

Returns

value of underlying type

Note

replace with std impl in c++23: https://en.cppreference.com/w/cpp/utility/to_underlying