mirror of
https://github.com/aantron/better-enums.git
synced 2025-12-06 16:56:42 +08:00
Simplified enum.h.
This patch contains several minor changes. - Eliminated the use of a deleted constructor in C++11. C++98 private default constructor is sufficient. - Eliminated old namespace _enum and merged it with namespace better_enums. - Prefixed size_t with std:: to comply with standards more strictly. - Shortened feature control macros by deleting the word "FORCE". Also moved make_macros.py.
This commit is contained in:
Anton Bachin
parent
a757e27891
commit
a9ddc59808
173
enum.h
173
enum.h
@ -14,7 +14,7 @@
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#ifdef BETTER_ENUMS_FORCE_CONSTEXPR
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#ifdef BETTER_ENUMS_CONSTEXPR
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# define _ENUM_HAVE_CONSTEXPR
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#else
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# ifdef __GNUC__
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@ -32,7 +32,7 @@
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# endif
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#endif
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#ifdef BETTER_ENUMS_FORCE_NO_CONSTEXPR
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#ifdef BETTER_ENUMS_NO_CONSTEXPR
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# if defined(_ENUM_HAVE_CONSTEXPR)
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# undef _ENUM_HAVE_CONSTEXPR
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# endif
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@ -40,8 +40,10 @@
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#ifdef _ENUM_HAVE_CONSTEXPR
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# define _ENUM_CONSTEXPR constexpr
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# define _ENUM_NULLPTR nullptr
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#else
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# define _ENUM_CONSTEXPR
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# define _ENUM_NULLPTR ((void*)0)
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#endif
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#ifndef __GNUC__
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@ -150,14 +152,14 @@
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#define _ENUM_EAT_ASSIGN_SINGLE(EnumType, index, expression) \
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((_enum::_eat_assign<EnumType>)EnumType::expression),
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((better_enums::_eat_assign<EnumType>)EnumType::expression),
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#define _ENUM_EAT_ASSIGN(EnumType, ...) \
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_ENUM_PP_MAP(_ENUM_EAT_ASSIGN_SINGLE, EnumType, __VA_ARGS__)
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#define _ENUM_NS(EnumType) _enum::_data_ ## EnumType
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#define _ENUM_NS(EnumType) better_enums::_data_ ## EnumType
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#define _ENUM_NAME_ENDERS "= \t\n"
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@ -173,11 +175,11 @@ _ENUM_CONSTEXPR inline T _default()
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template <>
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_ENUM_CONSTEXPR inline const char* _default<const char*>()
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{
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return (const char*)0;
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return _ENUM_NULLPTR;
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}
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template <>
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_ENUM_CONSTEXPR inline size_t _default<size_t>()
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_ENUM_CONSTEXPR inline std::size_t _default<std::size_t>()
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{
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return 0;
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}
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@ -199,22 +201,15 @@ struct optional {
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T _value;
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};
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}
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namespace _enum {
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template <typename CastTo, typename Element>
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_ENUM_CONSTEXPR static better_enums::optional<CastTo>
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_map_index(const Element *array, better_enums::optional<size_t> index)
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_ENUM_CONSTEXPR static optional<CastTo>
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_map_index(const Element *array, optional<std::size_t> index)
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{
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return index ? (CastTo)array[*index] : better_enums::optional<CastTo>();
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return index ? (CastTo)array[*index] : optional<CastTo>();
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}
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template <typename T>
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_ENUM_CONSTEXPR static T
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_or_throw(better_enums::optional<T> maybe, const char *message)
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_ENUM_CONSTEXPR static T _or_throw(optional<T> maybe, const char *message)
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{
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return maybe ? *maybe : throw std::runtime_error(message);
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}
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@ -246,36 +241,30 @@ struct _Iterable {
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_ENUM_CONSTEXPR iterator begin() const { return iterator(_array); }
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_ENUM_CONSTEXPR iterator end() const { return iterator(_array + _size); }
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_ENUM_CONSTEXPR size_t size() const { return _size; }
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_ENUM_CONSTEXPR const Element& operator [](size_t index) const
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_ENUM_CONSTEXPR std::size_t size() const { return _size; }
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_ENUM_CONSTEXPR const Element& operator [](std::size_t index) const
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{ return _array[index]; }
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_ENUM_CONSTEXPR _Iterable(const Element *array, size_t s) :
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_array(array), _size(s) { };
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_ENUM_CONSTEXPR _Iterable(const Element *array, std::size_t s) :
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_array(array), _size(s) { }
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private:
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const Element * const _array;
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const size_t _size;
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const std::size_t _size;
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};
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_ENUM_CONSTEXPR inline bool _endsName(char c, size_t index = 0)
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_ENUM_CONSTEXPR inline bool _endsName(char c, std::size_t index = 0)
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{
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return
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// First, test whether c is equal to the current character in
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// _ENUM_NAME_ENDERS. In the case where c is the null terminator, this
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// will cause _endsName to return true when it has exhausted
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// _ENUM_NAME_ENDERS.
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c == _ENUM_NAME_ENDERS[index] ? true :
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// If _ENUM_NAME_ENDERS has been exhausted and c never matched, return
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// false.
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_ENUM_NAME_ENDERS[index] == '\0' ? false :
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// Otherwise, go on to the next character in _ENUM_ENDERS.
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_endsName(c, index + 1);
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}
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_ENUM_CONSTEXPR inline bool _hasExplicitValue(const char *s, size_t index = 0)
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_ENUM_CONSTEXPR inline bool _hasExplicitValue(const char *s,
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std::size_t index = 0)
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{
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return
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s[index] == '\0' ? false :
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@ -283,13 +272,14 @@ _ENUM_CONSTEXPR inline bool _hasExplicitValue(const char *s, size_t index = 0)
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_hasExplicitValue(s, index + 1);
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}
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_ENUM_CONSTEXPR inline size_t _constantLength(const char *s, size_t index = 0)
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_ENUM_CONSTEXPR inline std::size_t _constantLength(const char *s,
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std::size_t index = 0)
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{
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return _endsName(s[index]) ? index : _constantLength(s, index + 1);
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}
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_ENUM_CONSTEXPR inline char _select(const char *from, size_t from_length,
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size_t index)
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_ENUM_CONSTEXPR inline char _select(const char *from, std::size_t from_length,
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std::size_t index)
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{
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return index >= from_length ? '\0' : from[index];
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}
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@ -301,7 +291,7 @@ _ENUM_CONSTEXPR inline char _toLowercaseAscii(char c)
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_ENUM_CONSTEXPR inline bool _namesMatch(const char *stringizedName,
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const char *referenceName,
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size_t index = 0)
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std::size_t index = 0)
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{
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return
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_endsName(stringizedName[index]) ? referenceName[index] == '\0' :
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@ -312,7 +302,7 @@ _ENUM_CONSTEXPR inline bool _namesMatch(const char *stringizedName,
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_ENUM_CONSTEXPR inline bool _namesMatchNocase(const char *stringizedName,
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const char *referenceName,
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size_t index = 0)
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std::size_t index = 0)
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{
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return
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_endsName(stringizedName[index]) ? referenceName[index] == '\0' :
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@ -322,7 +312,21 @@ _ENUM_CONSTEXPR inline bool _namesMatchNocase(const char *stringizedName,
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_namesMatchNocase(stringizedName, referenceName, index + 1);
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}
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} // namespace _enum
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inline void _trim_names(const char * const *raw_names,
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const char **trimmed_names, std::size_t count)
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{
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for (std::size_t index = 0; index < count; ++index) {
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std::size_t length = std::strcspn(raw_names[index], _ENUM_NAME_ENDERS);
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char *trimmed = new char[length + 1];
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std::strncpy(trimmed, raw_names[index], length);
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trimmed[length] = '\0';
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trimmed_names[index] = trimmed;
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}
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}
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} // namespace better_enums
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@ -339,7 +343,7 @@ _ENUM_CONSTEXPR inline bool _namesMatchNocase(const char *stringizedName,
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#define _ENUM_TRIM_SINGLE_STRING(ignored, index, expression) \
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constexpr size_t _length_ ## index = _constantLength(#expression); \
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constexpr std::size_t _length_ ## index = _constantLength(#expression); \
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constexpr const char _trimmed_ ## index [] = \
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{ _ENUM_SELECT_CHARACTERS(#expression, _length_ ## index) }; \
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constexpr const char *_final_ ## index = \
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@ -367,32 +371,14 @@ constexpr const char *_final_ ## index = \
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#define _ENUM_STRINGIZE(...) \
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_ENUM_PP_MAP(_ENUM_STRINGIZE_SINGLE, ignored, __VA_ARGS__)
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namespace _enum {
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inline void _trim_names(const char * const *raw_names,
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const char **trimmed_names, size_t count)
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{
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for (size_t index = 0; index < count; ++index) {
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size_t length = std::strcspn(raw_names[index], _ENUM_NAME_ENDERS);
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char *trimmed = new char[length + 1];
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std::strncpy(trimmed, raw_names[index], length);
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trimmed[length] = '\0';
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trimmed_names[index] = trimmed;
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}
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}
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}
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#define _ENUM_TYPE(SetUnderlyingType, DisableDefault, SwitchType, \
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GenerateSwitchType, GenerateStrings, ToStringConstexpr, \
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#define _ENUM_TYPE(SetUnderlyingType, SwitchType, GenerateSwitchType, \
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GenerateStrings, ToStringConstexpr, \
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DeclareInitialize, DefineInitialize, CallInitialize, \
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Enum, Integral, ...) \
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\
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namespace _enum { \
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namespace better_enums { \
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namespace _data_ ## Enum { \
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\
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GenerateSwitchType(Integral, __VA_ARGS__) \
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@ -403,7 +389,7 @@ GenerateSwitchType(Integral, __VA_ARGS__) \
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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<size_t> _optional_index; \
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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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@ -433,13 +419,14 @@ class Enum { \
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_ENUM_CONSTEXPR static bool _is_valid(const char *name); \
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_ENUM_CONSTEXPR static bool _is_valid_nocase(const char *name); \
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\
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typedef _enum::_Iterable<Enum> _value_iterable; \
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typedef _enum::_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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\
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_ENUM_CONSTEXPR static const size_t _size = _ENUM_PP_COUNT(__VA_ARGS__); \
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_ENUM_CONSTEXPR static const std::size_t _size = \
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_ENUM_PP_COUNT(__VA_ARGS__); \
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\
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_ENUM_CONSTEXPR static const char* _name(); \
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_ENUM_CONSTEXPR static _value_iterable _values(); \
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@ -447,20 +434,20 @@ class Enum { \
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\
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_integral _value; \
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\
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DisableDefault(Enum) \
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\
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private: \
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Enum() : _value(0) { } \
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\
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DeclareInitialize \
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\
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_ENUM_CONSTEXPR static _optional_index \
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_from_int_loop(_integral value, size_t index = 0); \
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_from_int_loop(_integral value, std::size_t index = 0); \
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_ENUM_CONSTEXPR static _optional_index \
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_from_string_loop(const char *name, size_t index = 0); \
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_from_string_loop(const char *name, std::size_t index = 0); \
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_ENUM_CONSTEXPR static _optional_index \
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_from_string_nocase_loop(const char *name, size_t index = 0); \
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_from_string_nocase_loop(const char *name, std::size_t index = 0); \
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}; \
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\
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namespace _enum { \
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namespace better_enums { \
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namespace _data_ ## Enum { \
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\
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enum PutNamesInThisScopeAlso { __VA_ARGS__ }; \
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@ -490,7 +477,7 @@ Enum::_from_integral_unchecked(Enum::_integral value) \
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_ENUM_CONSTEXPR inline Enum Enum::_from_integral(Enum::_integral value) \
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{ \
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return \
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_enum::_or_throw(_from_integral_nothrow(value), \
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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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@ -498,15 +485,15 @@ _ENUM_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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_enum::_map_index<Enum>(_ENUM_NS(Enum)::value_array, \
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better_enums::_map_index<Enum>(_ENUM_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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_enum::_or_throw( \
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_enum::_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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_ENUM_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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@ -515,7 +502,7 @@ ToStringConstexpr inline const char* Enum::_to_string() const \
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_ENUM_CONSTEXPR inline Enum Enum::_from_string(const char *name) \
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{ \
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return \
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_enum::_or_throw(_from_string_nothrow(name), \
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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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@ -523,22 +510,22 @@ _ENUM_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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_enum::_map_index<Enum>( \
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better_enums::_map_index<Enum>( \
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_ENUM_NS(Enum)::value_array, _from_string_loop(name)); \
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} \
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\
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_ENUM_CONSTEXPR inline Enum Enum::_from_string_nocase(const char *name) \
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{ \
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return \
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_enum::_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(_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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_ENUM_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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_enum::_map_index<Enum>(_ENUM_NS(Enum)::value_array, \
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better_enums::_map_index<Enum>(_ENUM_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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@ -575,7 +562,7 @@ ToStringConstexpr inline Enum::_name_iterable Enum::_names() \
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DefineInitialize(Enum) \
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\
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_ENUM_CONSTEXPR inline Enum::_optional_index \
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Enum::_from_int_loop(Enum::_integral value, size_t index) \
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Enum::_from_int_loop(Enum::_integral value, 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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@ -585,21 +572,21 @@ Enum::_from_int_loop(Enum::_integral value, size_t index) \
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} \
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\
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_ENUM_CONSTEXPR inline Enum::_optional_index \
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Enum::_from_string_loop(const char *name, size_t index) \
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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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_enum::_namesMatch(_ENUM_NS(Enum)::raw_names()[index], name) ? \
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better_enums::_namesMatch(_ENUM_NS(Enum)::raw_names()[index], 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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\
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_ENUM_CONSTEXPR inline Enum::_optional_index \
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Enum::_from_string_nocase_loop(const char *name, size_t index) \
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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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_enum::_namesMatchNocase( \
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better_enums::_namesMatchNocase( \
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_ENUM_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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@ -627,15 +614,6 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
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#define _ENUM_CXX11_UNDERLYING_TYPE(Integral) \
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: Integral
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// C++98, C++11
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#define _ENUM_CXX98_NO_DEFAULT_CONSTRUCTOR(Type) \
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private: \
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Type() { }
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// C++11
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#define _ENUM_CXX11_NO_DEFAULT_CONSTRUCTOR(Type) \
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Type() = delete;
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// C++98, C++11
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#define _ENUM_REGULAR_ENUM_SWITCH_TYPE(Type) \
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_enumerated
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@ -731,7 +709,7 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
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if (_ENUM_NS(Enum)::initialized()) \
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return 0; \
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\
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_enum::_trim_names(_ENUM_NS(Enum)::raw_names(), \
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better_enums::_trim_names(_ENUM_NS(Enum)::raw_names(), \
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_ENUM_NS(Enum)::name_array(), _size); \
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\
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_ENUM_NS(Enum)::initialized() = true; \
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@ -744,7 +722,7 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
|
||||
|
||||
// C++98, C++11 fast version
|
||||
#define _ENUM_DO_CALL_INITIALIZE(value) \
|
||||
_enum::continue_with(initialize(), value)
|
||||
better_enums::continue_with(initialize(), value)
|
||||
|
||||
// C++11 slow all-constexpr version
|
||||
#define _ENUM_DO_NOT_CALL_INITIALIZE(value) \
|
||||
@ -752,7 +730,7 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
|
||||
|
||||
|
||||
|
||||
#ifdef BETTER_ENUMS_FORCE_STRICT_CONVERSION
|
||||
#ifdef BETTER_ENUMS_STRICT_CONVERSION
|
||||
# define _ENUM_DEFAULT_SWITCH_TYPE \
|
||||
_ENUM_ENUM_CLASS_SWITCH_TYPE
|
||||
# define _ENUM_DEFAULT_SWITCH_TYPE_GENERATE \
|
||||
@ -768,7 +746,7 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
|
||||
|
||||
#ifdef _ENUM_HAVE_CONSTEXPR
|
||||
|
||||
#ifdef BETTER_ENUMS_FORCE_CONSTEXPR_TO_STRING
|
||||
#ifdef BETTER_ENUMS_CONSTEXPR_TO_STRING
|
||||
# define _ENUM_DEFAULT_TRIM_STRINGS_ARRAYS \
|
||||
_ENUM_CXX11_FULL_CONSTEXPR_TRIM_STRINGS_ARRAYS
|
||||
# define _ENUM_DEFAULT_TO_STRING_KEYWORD \
|
||||
@ -794,7 +772,6 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
|
||||
|
||||
#define ENUM(Enum, Integral, ...) \
|
||||
_ENUM_TYPE(_ENUM_CXX11_UNDERLYING_TYPE, \
|
||||
_ENUM_CXX11_NO_DEFAULT_CONSTRUCTOR, \
|
||||
_ENUM_DEFAULT_SWITCH_TYPE, \
|
||||
_ENUM_DEFAULT_SWITCH_TYPE_GENERATE, \
|
||||
_ENUM_DEFAULT_TRIM_STRINGS_ARRAYS, \
|
||||
@ -806,7 +783,6 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
|
||||
|
||||
#define SLOW_ENUM(Enum, Integral, ...) \
|
||||
_ENUM_TYPE(_ENUM_CXX11_UNDERLYING_TYPE, \
|
||||
_ENUM_CXX11_NO_DEFAULT_CONSTRUCTOR, \
|
||||
_ENUM_DEFAULT_SWITCH_TYPE, \
|
||||
_ENUM_DEFAULT_SWITCH_TYPE_GENERATE, \
|
||||
_ENUM_CXX11_FULL_CONSTEXPR_TRIM_STRINGS_ARRAYS, \
|
||||
@ -820,7 +796,6 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
|
||||
|
||||
#define ENUM(Enum, Integral, ...) \
|
||||
_ENUM_TYPE(_ENUM_CXX98_UNDERLYING_TYPE, \
|
||||
_ENUM_CXX98_NO_DEFAULT_CONSTRUCTOR, \
|
||||
_ENUM_DEFAULT_SWITCH_TYPE, \
|
||||
_ENUM_DEFAULT_SWITCH_TYPE_GENERATE, \
|
||||
_ENUM_CXX98_TRIM_STRINGS_ARRAYS, \
|
||||
|
||||
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Reference in New Issue
Block a user