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https://github.com/aantron/better-enums.git
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Made ENUM usable in namespaces.
This commit is contained in:
Anton Bachin
parent
97197088fe
commit
5edcb3e121
10
README.md
10
README.md
@ -65,7 +65,7 @@ enums that are missing from standard C++.
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- Supported and tested on clang, gcc, and msvc.
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- Fast compilation. You have to declare a few dozen enums to slow down your
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compiler as much as [just including `iostream` does][performance].
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- Use any initializers, just like with a built-in enum.
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- Use any initializers and sparse ranges, just like with a built-in enum.
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- Guaranteed size and alignment — you choose the representation type.
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[performance]: http://aantron.github.io/better-enums/Performance.html
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@ -73,8 +73,8 @@ enums that are missing from standard C++.
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## Limitations
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The biggest current limitation is that the `ENUM` macro can't be used inside a
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class or namespace. This seems difficult to remove, but I am looking into it. In
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the meantime, there is a workaround with a `typedef` (or `using`):
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class. This seems difficult to remove, but I am looking into it. In the
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meantime, there is a workaround with a `typedef` (or `using`):
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```cpp
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ENUM(UniquePrefix_Color, uint8_t, Red, Green, Blue)
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@ -83,8 +83,12 @@ struct triplet {
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typedef UniquePrefix_Color Color;
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Color r, g, b;
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};
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triplet::Color color;
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```
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You can, however, use `ENUM` inside a namespace.
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## Contact
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Don't hesitate to contact me about features or bugs:
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58
enum.h
58
enum.h
@ -229,7 +229,7 @@
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#define BETTER_ENUMS__EAT_ASSIGN_SINGLE(EnumType, index, expression) \
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((better_enums::_eat_assign<EnumType>)EnumType::expression),
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((::better_enums::_eat_assign<EnumType>)EnumType::expression),
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#define BETTER_ENUMS__EAT_ASSIGN(EnumType, ...) \
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BETTER_ENUMS__ID( \
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@ -422,7 +422,7 @@ inline void _trim_names(const char * const *raw_names,
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#define BETTER_ENUMS__SELECT_SINGLE_CHARACTER(from, from_length, index) \
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_select(from, from_length, index),
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::better_enums::_select(from, from_length, index),
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#define BETTER_ENUMS__SELECT_CHARACTERS(from, from_length) \
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BETTER_ENUMS__ITERATE( \
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@ -431,11 +431,13 @@ inline void _trim_names(const char * const *raw_names,
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#define BETTER_ENUMS__TRIM_SINGLE_STRING(ignored, index, expression) \
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constexpr std::size_t _length_ ## index = _constantLength(#expression); \
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constexpr std::size_t _length_ ## index = \
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::better_enums::_constantLength(#expression); \
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constexpr const char _trimmed_ ## index [] = \
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{ BETTER_ENUMS__SELECT_CHARACTERS(#expression, _length_ ## index) }; \
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constexpr const char *_final_ ## index = \
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_hasExplicitValue(#expression) ? _trimmed_ ## index : #expression;
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::better_enums::_hasExplicitValue(#expression) ? \
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_trimmed_ ## index : #expression;
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#define BETTER_ENUMS__TRIM_STRINGS(...) \
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BETTER_ENUMS__ID( \
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@ -482,8 +484,8 @@ BETTER_ENUMS__ID(GenerateSwitchType(Integral, __VA_ARGS__)) \
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\
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class Enum { \
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private: \
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typedef better_enums::optional<Enum> _optional; \
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typedef better_enums::optional<std::size_t> _optional_index; \
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typedef ::better_enums::optional<Enum> _optional; \
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typedef ::better_enums::optional<std::size_t> _optional_index; \
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\
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public: \
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enum _enumerated SetUnderlyingType(Integral) { __VA_ARGS__ }; \
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@ -516,8 +518,8 @@ class Enum { \
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BETTER_ENUMS__CONSTEXPR static bool _is_valid(const char *name); \
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BETTER_ENUMS__CONSTEXPR static bool _is_valid_nocase(const char *name); \
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\
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typedef better_enums::_Iterable<Enum> _value_iterable; \
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typedef better_enums::_Iterable<const char*> _name_iterable; \
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typedef ::better_enums::_Iterable<Enum> _value_iterable; \
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typedef ::better_enums::_Iterable<const char*> _name_iterable; \
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\
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typedef _value_iterable::iterator _value_iterator; \
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typedef _name_iterable::iterator _name_iterator; \
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@ -577,23 +579,23 @@ Enum::_from_integral_unchecked(Enum::_integral value) \
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BETTER_ENUMS__CONSTEXPR inline Enum Enum::_from_integral(Enum::_integral value)\
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{ \
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return \
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better_enums::_or_throw(_from_integral_nothrow(value), \
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"Enum::_from_integral: invalid argument"); \
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::better_enums::_or_throw(_from_integral_nothrow(value), \
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"Enum::_from_integral: invalid argument"); \
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} \
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\
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BETTER_ENUMS__CONSTEXPR inline Enum::_optional \
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Enum::_from_integral_nothrow(Enum::_integral value) \
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{ \
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return \
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better_enums::_map_index<Enum>(BETTER_ENUMS__NS(Enum)::value_array, \
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_from_int_loop(value)); \
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::better_enums::_map_index<Enum>(BETTER_ENUMS__NS(Enum)::value_array, \
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_from_int_loop(value)); \
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} \
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\
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ToStringConstexpr inline const char* Enum::_to_string() const \
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{ \
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return \
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better_enums::_or_throw( \
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better_enums::_map_index<const char*>( \
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::better_enums::_or_throw( \
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::better_enums::_map_index<const char*>( \
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BETTER_ENUMS__NS(Enum)::name_array(), \
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_from_int_loop(CallInitialize(_value))), \
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"Enum::to_string: invalid enum value"); \
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@ -602,31 +604,32 @@ ToStringConstexpr inline const char* Enum::_to_string() const \
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BETTER_ENUMS__CONSTEXPR inline Enum Enum::_from_string(const char *name) \
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{ \
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return \
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better_enums::_or_throw(_from_string_nothrow(name), \
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"Enum::_from_string: invalid argument"); \
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::better_enums::_or_throw(_from_string_nothrow(name), \
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"Enum::_from_string: invalid argument"); \
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} \
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\
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BETTER_ENUMS__CONSTEXPR inline Enum::_optional \
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Enum::_from_string_nothrow(const char *name) \
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{ \
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return \
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better_enums::_map_index<Enum>( \
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::better_enums::_map_index<Enum>( \
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BETTER_ENUMS__NS(Enum)::value_array, _from_string_loop(name)); \
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} \
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\
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BETTER_ENUMS__CONSTEXPR inline Enum Enum::_from_string_nocase(const char *name)\
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{ \
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return \
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better_enums::_or_throw(_from_string_nocase_nothrow(name), \
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"Enum::_from_string_nocase: invalid argument");\
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::better_enums::_or_throw( \
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_from_string_nocase_nothrow(name), \
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"Enum::_from_string_nocase: invalid argument"); \
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} \
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\
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BETTER_ENUMS__CONSTEXPR inline Enum::_optional \
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Enum::_from_string_nocase_nothrow(const char *name) \
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{ \
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return \
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better_enums::_map_index<Enum>(BETTER_ENUMS__NS(Enum)::value_array, \
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_from_string_nocase_loop(name)); \
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::better_enums::_map_index<Enum>(BETTER_ENUMS__NS(Enum)::value_array, \
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_from_string_nocase_loop(name)); \
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} \
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\
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BETTER_ENUMS__CONSTEXPR inline bool Enum::_is_valid(Enum::_integral value) \
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@ -678,8 +681,8 @@ Enum::_from_string_loop(const char *name, std::size_t index) \
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{ \
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return \
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index == _size ? _optional_index() : \
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better_enums::_namesMatch(BETTER_ENUMS__NS(Enum)::raw_names()[index], \
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name) ? \
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::better_enums::_namesMatch(BETTER_ENUMS__NS(Enum)::raw_names()[index],\
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name) ? \
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_optional_index(index) : \
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_from_string_loop(name, index + 1); \
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} \
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@ -689,7 +692,7 @@ Enum::_from_string_nocase_loop(const char *name, std::size_t index) \
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{ \
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return \
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index == _size ? _optional_index() : \
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better_enums::_namesMatchNocase( \
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::better_enums::_namesMatchNocase( \
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BETTER_ENUMS__NS(Enum)::raw_names()[index], name) ? \
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_optional_index(index) : \
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_from_string_nocase_loop(name, index + 1); \
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@ -813,8 +816,9 @@ BETTER_ENUMS__CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
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if (BETTER_ENUMS__NS(Enum)::initialized()) \
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return 0; \
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\
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better_enums::_trim_names(BETTER_ENUMS__NS(Enum)::raw_names(), \
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BETTER_ENUMS__NS(Enum)::name_array(), _size);\
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::better_enums::_trim_names(BETTER_ENUMS__NS(Enum)::raw_names(), \
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BETTER_ENUMS__NS(Enum)::name_array(), \
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_size); \
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\
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BETTER_ENUMS__NS(Enum)::initialized() = true; \
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\
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@ -826,7 +830,7 @@ BETTER_ENUMS__CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
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// C++98, C++11 fast version
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#define BETTER_ENUMS__DO_CALL_INITIALIZE(value) \
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better_enums::continue_with(initialize(), value)
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::better_enums::continue_with(initialize(), value)
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// C++11 slow all-constexpr version
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#define BETTER_ENUMS__DO_NOT_CALL_INITIALIZE(value) \
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@ -18,6 +18,14 @@ ENUM(Compression, short, None, Huffman, Default = Huffman)
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namespace test {
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ENUM(Namespaced, short, One, Two)
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}
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// Using _ENUM_HAVE_CONSTEXPR as a proxy for C++11 support. This should be
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// changed to be more precise in the future.
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#ifdef _ENUM_HAVE_CONSTEXPR
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@ -269,4 +277,23 @@ class EnumTests : public CxxTest::TestSuite {
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{
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TS_ASSERT_EQUALS(Compression::Default, Compression::Huffman);
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}
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void test_namespaced()
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{
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TS_ASSERT_EQUALS((+test::Namespaced::One)._to_integral(), 0);
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TS_ASSERT_EQUALS(test::Namespaced::_from_integral(0),
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+test::Namespaced::One);
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TS_ASSERT_EQUALS(strcmp((+test::Namespaced::One)._to_string(), "One"),
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0);
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TS_ASSERT_EQUALS(test::Namespaced::_from_string("Two"),
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+test::Namespaced::Two);
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TS_ASSERT_EQUALS(test::Namespaced::_values()[0],
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+test::Namespaced::One);
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TS_ASSERT_EQUALS(strcmp(test::Namespaced::_names()[0], "One"), 0);
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TS_ASSERT_EQUALS(*test::Namespaced::_values().begin(),
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+test::Namespaced::One);
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TS_ASSERT_EQUALS(strcmp(*test::Namespaced::_names().begin(), "One"), 0);
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}
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};
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