mirror of
https://github.com/aantron/better-enums.git
synced 2025-12-12 06:29:53 +08:00
Made all-constexpr (slow) enums an opt-in feature.
This commit is contained in:
Anton Bachin
parent
156b9d9b04
commit
5ce9537d66
101
enum.h
101
enum.h
@ -9,12 +9,9 @@
|
||||
|
||||
|
||||
#include <cstddef>
|
||||
#include <cstring>
|
||||
#include <stdexcept>
|
||||
|
||||
#ifdef BETTER_ENUMS_EXTRA_INCLUDE
|
||||
# include BETTER_ENUMS_EXTRA_INCLUDE
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
#ifdef BETTER_ENUMS_FORCE_CONSTEXPR
|
||||
@ -365,8 +362,6 @@ constexpr const char *_final_ ## index = \
|
||||
|
||||
|
||||
|
||||
#include <cstring>
|
||||
|
||||
#define _ENUM_STRINGIZE_SINGLE(ignored, index, expression) #expression,
|
||||
|
||||
#define _ENUM_STRINGIZE(...) \
|
||||
@ -393,8 +388,8 @@ inline void _trim_names(const char * const *raw_names,
|
||||
|
||||
|
||||
#define _ENUM_TYPE(SetUnderlyingType, DisableDefault, SwitchType, \
|
||||
GenerateSwitchType, GenerateStrings, DeclareInitialize, \
|
||||
DefineInitialize, CallInitialize, \
|
||||
GenerateSwitchType, GenerateStrings, ToStringConstexpr, \
|
||||
DeclareInitialize, DefineInitialize, CallInitialize, \
|
||||
Enum, Integral, ...) \
|
||||
\
|
||||
namespace _enum { \
|
||||
@ -426,7 +421,7 @@ class Enum { \
|
||||
_ENUM_CONSTEXPR static Enum _from_integral_unchecked(_integral value); \
|
||||
_ENUM_CONSTEXPR static _optional _from_integral_nothrow(_integral value); \
|
||||
\
|
||||
_ENUM_CONSTEXPR const char* _to_string() const; \
|
||||
ToStringConstexpr const char* _to_string() const; \
|
||||
_ENUM_CONSTEXPR static Enum _from_string(const char *name); \
|
||||
_ENUM_CONSTEXPR static _optional _from_string_nothrow(const char *name); \
|
||||
\
|
||||
@ -448,7 +443,7 @@ class Enum { \
|
||||
\
|
||||
_ENUM_CONSTEXPR static const char* _name(); \
|
||||
_ENUM_CONSTEXPR static _value_iterable _values(); \
|
||||
_ENUM_CONSTEXPR static _name_iterable _names(); \
|
||||
ToStringConstexpr static _name_iterable _names(); \
|
||||
\
|
||||
_integral _value; \
|
||||
\
|
||||
@ -507,7 +502,7 @@ Enum::_from_integral_nothrow(Enum::_integral value) \
|
||||
_from_int_loop(value)); \
|
||||
} \
|
||||
\
|
||||
_ENUM_CONSTEXPR inline const char* Enum::_to_string() const \
|
||||
ToStringConstexpr inline const char* Enum::_to_string() const \
|
||||
{ \
|
||||
return \
|
||||
_enum::_or_throw( \
|
||||
@ -572,7 +567,7 @@ _ENUM_CONSTEXPR inline Enum::_value_iterable Enum::_values() \
|
||||
return _value_iterable(_ENUM_NS(Enum)::value_array, _size); \
|
||||
} \
|
||||
\
|
||||
_ENUM_CONSTEXPR inline Enum::_name_iterable Enum::_names() \
|
||||
ToStringConstexpr inline Enum::_name_iterable Enum::_names() \
|
||||
{ \
|
||||
return _name_iterable(_ENUM_NS(Enum)::name_array(), CallInitialize(_size));\
|
||||
} \
|
||||
@ -594,7 +589,7 @@ Enum::_from_string_loop(const char *name, size_t index) \
|
||||
{ \
|
||||
return \
|
||||
index == _size ? _optional_index() : \
|
||||
_enum::_namesMatch(_ENUM_NS(Enum)::name_array()[index], name) ? \
|
||||
_enum::_namesMatch(_ENUM_NS(Enum)::raw_names()[index], name) ? \
|
||||
_optional_index(index) : \
|
||||
_from_string_loop(name, index + 1); \
|
||||
} \
|
||||
@ -605,7 +600,7 @@ Enum::_from_string_nocase_loop(const char *name, size_t index) \
|
||||
return \
|
||||
index == _size ? _optional_index() : \
|
||||
_enum::_namesMatchNocase( \
|
||||
_ENUM_NS(Enum)::name_array()[index], name) ? \
|
||||
_ENUM_NS(Enum)::raw_names()[index], name) ? \
|
||||
_optional_index(index) : \
|
||||
_from_string_nocase_loop(name, index + 1); \
|
||||
} \
|
||||
@ -659,13 +654,13 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
|
||||
#define _ENUM_GENERATE_STRINGS_PREPARE_FOR_RUNTIME_WRAPPED(Enum, ...) \
|
||||
inline const char** raw_names() \
|
||||
{ \
|
||||
static const char* value[] = { _ENUM_STRINGIZE(__VA_ARGS__) }; \
|
||||
static const char *value[] = { _ENUM_STRINGIZE(__VA_ARGS__) }; \
|
||||
return value; \
|
||||
} \
|
||||
\
|
||||
inline const char** name_array() \
|
||||
{ \
|
||||
static const char* value[Enum::_size]; \
|
||||
static const char *value[Enum::_size]; \
|
||||
return value; \
|
||||
} \
|
||||
\
|
||||
@ -677,20 +672,50 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
|
||||
|
||||
// C++11 fast version
|
||||
#define _ENUM_GENERATE_STRINGS_PREPARE_FOR_RUNTIME_CONSTEXPR(Enum, ...) \
|
||||
constexpr const char *raw_names[] = { _ENUM_STRINGIZE(__VA_ARGS__) }; \
|
||||
const char *name_array[Enum::_size]; \
|
||||
bool initialized = false;
|
||||
constexpr const char *the_raw_names[] = \
|
||||
{ _ENUM_STRINGIZE(__VA_ARGS__) }; \
|
||||
\
|
||||
constexpr const char * const * raw_names() \
|
||||
{ \
|
||||
return the_raw_names; \
|
||||
} \
|
||||
\
|
||||
inline const char** name_array() \
|
||||
{ \
|
||||
static const char *value[Enum::_size]; \
|
||||
return value; \
|
||||
} \
|
||||
\
|
||||
inline bool& initialized() \
|
||||
{ \
|
||||
static bool value = false; \
|
||||
return value; \
|
||||
}
|
||||
|
||||
// C++11 slow all-constexpr version
|
||||
#define _ENUM_GENERATE_STRINGS_COMPILE_TIME(Enum, ...) \
|
||||
_ENUM_TRIM_STRINGS(__VA_ARGS__) \
|
||||
\
|
||||
constexpr const char * const the_name_array[] = \
|
||||
{ _ENUM_REFER_TO_STRINGS(__VA_ARGS__) }; \
|
||||
\
|
||||
constexpr const char * const * name_array() \
|
||||
{ \
|
||||
return the_name_array; \
|
||||
} \
|
||||
\
|
||||
constexpr const char * const * raw_names() \
|
||||
{ \
|
||||
return the_name_array; \
|
||||
}
|
||||
|
||||
// C++98, C++11 fast version
|
||||
#define _ENUM_TO_STRING_NOT_CONSTEXPR
|
||||
|
||||
// C++11 slow all-constexpr version
|
||||
#define _ENUM_TO_STRING_CONSTEXPR \
|
||||
constexpr
|
||||
|
||||
// C++98, C++11 fast version
|
||||
#define _ENUM_DECLARE_INITIALIZE \
|
||||
static int initialize();
|
||||
@ -728,12 +753,49 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
|
||||
|
||||
#ifdef _ENUM_HAVE_CONSTEXPR
|
||||
|
||||
#ifdef BETTER_ENUMS_FORCE_CONSTEXPR_TO_STRING
|
||||
# define _ENUM_DEFAULT_CONSTEXPR_TO_STRING \
|
||||
_ENUM_GENERATE_STRINGS_COMPILE_TIME
|
||||
# define _ENUM_DEFAULT_TO_STRING_CONSTEXPR \
|
||||
_ENUM_TO_STRING_CONSTEXPR
|
||||
# define _ENUM_DEFAULT_INITIALIZE_DECLARATION \
|
||||
_ENUM_INITIALIZE_DECLARATION_NOT_NEEDED
|
||||
# define _ENUM_DEFAULT_INITIALIZE_DEFINITION \
|
||||
_ENUM_DEFINE_INITIALIZE_NOT_NEEDED
|
||||
# define _ENUM_DEFAULT_CALL_INITIALIZE \
|
||||
_ENUM_CALL_INITIALIZE_IS_NO_OP
|
||||
#else
|
||||
# define _ENUM_DEFAULT_CONSTEXPR_TO_STRING \
|
||||
_ENUM_GENERATE_STRINGS_PREPARE_FOR_RUNTIME_CONSTEXPR
|
||||
# define _ENUM_DEFAULT_TO_STRING_CONSTEXPR \
|
||||
_ENUM_TO_STRING_NOT_CONSTEXPR
|
||||
# define _ENUM_DEFAULT_INITIALIZE_DECLARATION \
|
||||
_ENUM_DECLARE_INITIALIZE
|
||||
# define _ENUM_DEFAULT_INITIALIZE_DEFINITION \
|
||||
_ENUM_DEFINE_INITIALIZE
|
||||
# define _ENUM_DEFAULT_CALL_INITIALIZE \
|
||||
_ENUM_CALL_INITIALIZE
|
||||
#endif
|
||||
|
||||
#define ENUM(Enum, Integral, ...) \
|
||||
_ENUM_TYPE(_ENUM_SET_UNDERLYING_TYPE_IMPLEMENTED, \
|
||||
_ENUM_DISABLE_DEFAULT_BY_DELETE, \
|
||||
_ENUM_SWITCH_TYPE_IS_ENUM_CLASS, \
|
||||
_ENUM_GENERATE_SWITCH_TYPE_ENUM_CLASS, \
|
||||
_ENUM_DEFAULT_CONSTEXPR_TO_STRING, \
|
||||
_ENUM_DEFAULT_TO_STRING_CONSTEXPR, \
|
||||
_ENUM_DEFAULT_INITIALIZE_DECLARATION, \
|
||||
_ENUM_DEFAULT_INITIALIZE_DEFINITION, \
|
||||
_ENUM_DEFAULT_CALL_INITIALIZE, \
|
||||
Enum, Integral, __VA_ARGS__)
|
||||
|
||||
#define CONSTEXPR_TO_STRING_ENUM(Enum, Integral, ...) \
|
||||
_ENUM_TYPE(_ENUM_SET_UNDERLYING_TYPE_IMPLEMENTED, \
|
||||
_ENUM_DISABLE_DEFAULT_BY_DELETE, \
|
||||
_ENUM_SWITCH_TYPE_IS_ENUM_CLASS, \
|
||||
_ENUM_GENERATE_SWITCH_TYPE_ENUM_CLASS, \
|
||||
_ENUM_GENERATE_STRINGS_COMPILE_TIME, \
|
||||
_ENUM_TO_STRING_CONSTEXPR, \
|
||||
_ENUM_INITIALIZE_DECLARATION_NOT_NEEDED, \
|
||||
_ENUM_DEFINE_INITIALIZE_NOT_NEEDED, \
|
||||
_ENUM_CALL_INITIALIZE_IS_NO_OP, \
|
||||
@ -747,6 +809,7 @@ _ENUM_CONSTEXPR inline bool operator >=(const Enum &a, const Enum &b) \
|
||||
_ENUM_SWITCH_TYPE_IS_REGULAR_ENUM, \
|
||||
_ENUM_GENERATE_SWITCH_TYPE_REGULAR_ENUM, \
|
||||
_ENUM_GENERATE_STRINGS_PREPARE_FOR_RUNTIME_WRAPPED, \
|
||||
_ENUM_TO_STRING_NOT_CONSTEXPR, \
|
||||
_ENUM_DECLARE_INITIALIZE, \
|
||||
_ENUM_DEFINE_INITIALIZE, \
|
||||
_ENUM_CALL_INITIALIZE, \
|
||||
|
||||
@ -3,10 +3,12 @@
|
||||
// 1 (note - this means using "+ 1", not "++". The "++" operator is not
|
||||
// constexpr).
|
||||
|
||||
// #define BETTER_ENUMS_FORCE_CONSTEXPR_TO_STRING
|
||||
|
||||
#include <iostream>
|
||||
#include <enum.h>
|
||||
|
||||
ENUM(Channel, int, Red, Green = 2, Blue)
|
||||
CONSTEXPR_TO_STRING_ENUM(Channel, int, Red, Green = 2, Blue)
|
||||
|
||||
// Initialization.
|
||||
constexpr Channel channel_1 = Channel::Green;
|
||||
|
||||
@ -7,8 +7,8 @@
|
||||
#include <iostream>
|
||||
#include <enum.h>
|
||||
|
||||
ENUM(Channel, int, Red, Green, Blue)
|
||||
ENUM(Depth, int, TrueColor, HighColor)
|
||||
CONSTEXPR_TO_STRING_ENUM(Channel, int, Red, Green, Blue)
|
||||
CONSTEXPR_TO_STRING_ENUM(Depth, int, TrueColor, HighColor)
|
||||
|
||||
// Computes the length of a string.
|
||||
constexpr size_t string_length(const char *s, size_t index = 0)
|
||||
|
||||
@ -124,10 +124,6 @@ static_assert_1(*(Channel::_values().begin() + 2) == Channel::Blue);
|
||||
static_assert_1(Channel::_values()[1] == Channel::Green);
|
||||
static_assert_1(Channel::_values()[2] == Channel::Blue);
|
||||
|
||||
static_assert_1(Channel::_names().size() == Channel::_size);
|
||||
// The next one is a little janky, but actually the pointers should be the same.
|
||||
static_assert_1(*Channel::_names().begin() == (+Channel::Red)._to_string());
|
||||
|
||||
|
||||
|
||||
// Aliases.
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user