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Support specifying a custom default value

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This commit is contained in:
Mark Nauwelaerts 2019-04-14 10:55:44 +02:00
parent 8b4d8a9499
commit c124b2aa60
1 changed files with 28 additions and 5 deletions
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33
enum.h
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@ -585,8 +585,9 @@ constexpr const char *_final_ ## index = \
#define BETTER_ENUMS_TYPE(SetUnderlyingType, SwitchType, GenerateSwitchType, \
GenerateStrings, ToStringConstexpr, \
GenerateConstructor, \
DeclareInitialize, DefineInitialize, CallInitialize, \
Enum, Underlying, ...) \
Enum, Underlying, Default, ...) \
\
namespace better_enums_data_ ## Enum { \
\
@ -665,7 +666,7 @@ class Enum { \
\
_integral _value; \
\
BETTER_ENUMS_DEFAULT_CONSTRUCTOR(Enum) \
GenerateConstructor(Enum, Default) \
\
private: \
explicit BETTER_ENUMS_CONSTEXPR_ Enum(const _integral &value) : \
@ -1100,7 +1101,13 @@ operator >>(std::basic_istream<Char, Traits>& stream, Enum &value) \
Enum() : _value(0) { }
#endif
#define BETTER_ENUMS_DEFAULT_MAKE_CONSTRUCTOR(Enum, Value) \
BETTER_ENUMS_DEFAULT_CONSTRUCTOR(Enum)
#ifndef BETTER_ENUMS_DEFAULT_MAKE_DEFAULT_CONSTRUCTOR
# define BETTER_ENUMS_DEFAULT_MAKE_DEFAULT_CONSTRUCTOR(Enum, Default) \
Enum() : _value(Default) { }
#endif
#ifdef BETTER_ENUMS_HAVE_CONSTEXPR
@ -1139,10 +1146,11 @@ operator >>(std::basic_istream<Char, Traits>& stream, Enum &value) \
BETTER_ENUMS_DEFAULT_SWITCH_TYPE_GENERATE, \
BETTER_ENUMS_DEFAULT_TRIM_STRINGS_ARRAYS, \
BETTER_ENUMS_DEFAULT_TO_STRING_KEYWORD, \
BETTER_ENUMS_DEFAULT_MAKE_CONSTRUCTOR, \
BETTER_ENUMS_DEFAULT_DECLARE_INITIALIZE, \
BETTER_ENUMS_DEFAULT_DEFINE_INITIALIZE, \
BETTER_ENUMS_DEFAULT_CALL_INITIALIZE, \
Enum, Underlying, __VA_ARGS__))
Enum, Underlying, 0, __VA_ARGS__))
#define SLOW_ENUM(Enum, Underlying, ...) \
BETTER_ENUMS_ID(BETTER_ENUMS_TYPE( \
@ -1151,10 +1159,24 @@ operator >>(std::basic_istream<Char, Traits>& stream, Enum &value) \
BETTER_ENUMS_DEFAULT_SWITCH_TYPE_GENERATE, \
BETTER_ENUMS_CXX11_FULL_CONSTEXPR_TRIM_STRINGS_ARRAYS, \
BETTER_ENUMS_CONSTEXPR_TO_STRING_KEYWORD, \
BETTER_ENUMS_DEFAULT_MAKE_CONSTRUCTOR, \
BETTER_ENUMS_DECLARE_EMPTY_INITIALIZE, \
BETTER_ENUMS_DO_NOT_DEFINE_INITIALIZE, \
BETTER_ENUMS_DO_NOT_CALL_INITIALIZE, \
Enum, Underlying, __VA_ARGS__))
Enum, Underlying, 0, __VA_ARGS__))
#define BETTER_ENUM_DEFAULT(Enum, Underlying, Default, ...) \
BETTER_ENUMS_ID(BETTER_ENUMS_TYPE( \
BETTER_ENUMS_CXX11_UNDERLYING_TYPE, \
BETTER_ENUMS_DEFAULT_SWITCH_TYPE, \
BETTER_ENUMS_DEFAULT_SWITCH_TYPE_GENERATE, \
BETTER_ENUMS_DEFAULT_TRIM_STRINGS_ARRAYS, \
BETTER_ENUMS_DEFAULT_TO_STRING_KEYWORD, \
BETTER_ENUMS_DEFAULT_MAKE_DEFAULT_CONSTRUCTOR, \
BETTER_ENUMS_DEFAULT_DECLARE_INITIALIZE, \
BETTER_ENUMS_DEFAULT_DEFINE_INITIALIZE, \
BETTER_ENUMS_DEFAULT_CALL_INITIALIZE, \
Enum, Underlying, Default, __VA_ARGS__))
#else
@ -1165,10 +1187,11 @@ operator >>(std::basic_istream<Char, Traits>& stream, Enum &value) \
BETTER_ENUMS_DEFAULT_SWITCH_TYPE_GENERATE, \
BETTER_ENUMS_CXX98_TRIM_STRINGS_ARRAYS, \
BETTER_ENUMS_NO_CONSTEXPR_TO_STRING_KEYWORD, \
BETTER_ENUMS_DEFAULT_MAKE_CONSTRUCTOR, \
BETTER_ENUMS_DO_DECLARE_INITIALIZE, \
BETTER_ENUMS_DO_DEFINE_INITIALIZE, \
BETTER_ENUMS_DO_CALL_INITIALIZE, \
Enum, Underlying, __VA_ARGS__))
Enum, Underlying, 0, __VA_ARGS__))
#endif