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1326 lines
66 KiB
1326 lines
66 KiB
// This file is part of Better Enums, released under the BSD 2-clause license.
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// See LICENSE.md for details, or visit http://github.com/aantron/better-enums.
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#pragma once
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#ifndef BETTER_ENUMS_ENUM_H
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#define BETTER_ENUMS_ENUM_H
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#include <cstddef>
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#include <cstring>
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#include <iosfwd>
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#include <stdexcept>
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// in-line, non-#pragma warning handling
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// not supported in very old compilers (namely gcc 4.4 or less)
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#ifdef __GNUC__
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# ifdef __clang__
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# define BETTER_ENUMS_IGNORE_OLD_CAST_HEADER _Pragma("clang diagnostic push")
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# define BETTER_ENUMS_IGNORE_OLD_CAST_BEGIN _Pragma("clang diagnostic ignored \"-Wold-style-cast\"")
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# define BETTER_ENUMS_IGNORE_OLD_CAST_END _Pragma("clang diagnostic pop")
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_HEADER
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_BEGIN
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_END
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# else
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# define BETTER_ENUMS_GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100)
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# if BETTER_ENUMS_GCC_VERSION > 40400
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# define BETTER_ENUMS_IGNORE_OLD_CAST_HEADER _Pragma("GCC diagnostic push")
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# define BETTER_ENUMS_IGNORE_OLD_CAST_BEGIN _Pragma("GCC diagnostic ignored \"-Wold-style-cast\"")
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# define BETTER_ENUMS_IGNORE_OLD_CAST_END _Pragma("GCC diagnostic pop")
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# if (BETTER_ENUMS_GCC_VERSION >= 70300)
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_HEADER _Pragma("GCC diagnostic push")
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_BEGIN _Pragma("GCC diagnostic ignored \"-Wattributes\"")
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_END _Pragma("GCC diagnostic pop")
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# else
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_HEADER
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_BEGIN
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_END
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# endif
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# else
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# define BETTER_ENUMS_IGNORE_OLD_CAST_HEADER
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# define BETTER_ENUMS_IGNORE_OLD_CAST_BEGIN
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# define BETTER_ENUMS_IGNORE_OLD_CAST_END
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_HEADER
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_BEGIN
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_END
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# endif
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# endif
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#else // empty definitions for compilers that don't support _Pragma
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# define BETTER_ENUMS_IGNORE_OLD_CAST_HEADER
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# define BETTER_ENUMS_IGNORE_OLD_CAST_BEGIN
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# define BETTER_ENUMS_IGNORE_OLD_CAST_END
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_HEADER
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_BEGIN
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# define BETTER_ENUMS_IGNORE_ATTRIBUTES_END
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#endif
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// Feature detection.
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#ifdef __GNUC__
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# ifdef __clang__
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# if __has_feature(cxx_constexpr)
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# define BETTER_ENUMS_HAVE_CONSTEXPR
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# endif
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# if !defined(__EXCEPTIONS) || !__has_feature(cxx_exceptions)
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# define BETTER_ENUMS_NO_EXCEPTIONS
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# endif
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# else
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# if defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L
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# if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 6))
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# define BETTER_ENUMS_HAVE_CONSTEXPR
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# endif
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# endif
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# ifndef __EXCEPTIONS
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# define BETTER_ENUMS_NO_EXCEPTIONS
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# endif
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# endif
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#endif
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#ifdef _MSC_VER
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# if _MSC_VER >= 1911
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# define BETTER_ENUMS_HAVE_CONSTEXPR
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# endif
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# ifdef __clang__
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# if __has_feature(cxx_constexpr)
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# define BETTER_ENUMS_HAVE_CONSTEXPR
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# endif
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# endif
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# ifndef _CPPUNWIND
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# define BETTER_ENUMS_NO_EXCEPTIONS
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# endif
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# if _MSC_VER < 1600
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# define BETTER_ENUMS_VC2008_WORKAROUNDS
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# endif
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#endif
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#ifdef BETTER_ENUMS_CONSTEXPR
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# define BETTER_ENUMS_HAVE_CONSTEXPR
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#endif
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#ifdef BETTER_ENUMS_NO_CONSTEXPR
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# ifdef BETTER_ENUMS_HAVE_CONSTEXPR
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# undef BETTER_ENUMS_HAVE_CONSTEXPR
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# endif
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#endif
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// GCC (and maybe clang) can be made to warn about using 0 or NULL when nullptr
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// is available, so Better Enums tries to use nullptr. This passage uses
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// availability of constexpr as a proxy for availability of nullptr, i.e. it
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// assumes that nullptr is available when compiling on the right versions of gcc
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// and clang with the right -std flag. This is actually slightly wrong, because
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// nullptr is also available in Visual C++, but constexpr isn't. This
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// imprecision doesn't matter, however, because VC++ doesn't have the warnings
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// that make using nullptr necessary.
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#ifdef BETTER_ENUMS_HAVE_CONSTEXPR
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# define BETTER_ENUMS_CONSTEXPR_ constexpr
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# define BETTER_ENUMS_NULLPTR nullptr
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#else
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# define BETTER_ENUMS_CONSTEXPR_
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# define BETTER_ENUMS_NULLPTR NULL
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#endif
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#ifndef BETTER_ENUMS_NO_EXCEPTIONS
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# define BETTER_ENUMS_IF_EXCEPTIONS(x) x
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#else
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# define BETTER_ENUMS_IF_EXCEPTIONS(x)
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#endif
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#ifdef __GNUC__
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# define BETTER_ENUMS_UNUSED __attribute__((__unused__))
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#else
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# define BETTER_ENUMS_UNUSED
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#endif
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// Higher-order preprocessor macros.
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#ifdef BETTER_ENUMS_MACRO_FILE
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# include BETTER_ENUMS_MACRO_FILE
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#else
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#define BETTER_ENUMS_PP_MAP(macro, data, ...) \
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BETTER_ENUMS_ID( \
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BETTER_ENUMS_APPLY( \
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BETTER_ENUMS_PP_MAP_VAR_COUNT, \
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BETTER_ENUMS_PP_COUNT(__VA_ARGS__)) \
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(macro, data, __VA_ARGS__))
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#define BETTER_ENUMS_PP_MAP_VAR_COUNT(count) BETTER_ENUMS_M ## count
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#define BETTER_ENUMS_APPLY(macro, ...) BETTER_ENUMS_ID(macro(__VA_ARGS__))
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#define BETTER_ENUMS_ID(x) x
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#define BETTER_ENUMS_M1(m, d, x) m(d,0,x)
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#define BETTER_ENUMS_M2(m,d,x,...) m(d,1,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M1(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M3(m,d,x,...) m(d,2,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M2(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M4(m,d,x,...) m(d,3,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M3(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M5(m,d,x,...) m(d,4,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M4(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M6(m,d,x,...) m(d,5,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M5(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M7(m,d,x,...) m(d,6,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M6(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M8(m,d,x,...) m(d,7,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M7(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M9(m,d,x,...) m(d,8,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M8(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M10(m,d,x,...) m(d,9,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M9(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M11(m,d,x,...) m(d,10,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M10(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M12(m,d,x,...) m(d,11,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M11(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M13(m,d,x,...) m(d,12,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M12(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M14(m,d,x,...) m(d,13,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M13(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M15(m,d,x,...) m(d,14,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M14(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M16(m,d,x,...) m(d,15,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M15(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M17(m,d,x,...) m(d,16,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M16(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M18(m,d,x,...) m(d,17,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M17(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M19(m,d,x,...) m(d,18,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M18(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M20(m,d,x,...) m(d,19,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M19(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M21(m,d,x,...) m(d,20,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M20(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M22(m,d,x,...) m(d,21,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M21(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M23(m,d,x,...) m(d,22,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M22(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M24(m,d,x,...) m(d,23,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M23(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M25(m,d,x,...) m(d,24,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M24(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M26(m,d,x,...) m(d,25,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M25(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M27(m,d,x,...) m(d,26,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M26(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M28(m,d,x,...) m(d,27,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M27(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M29(m,d,x,...) m(d,28,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M28(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M30(m,d,x,...) m(d,29,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M29(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M31(m,d,x,...) m(d,30,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M30(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M32(m,d,x,...) m(d,31,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M31(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M33(m,d,x,...) m(d,32,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M32(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M34(m,d,x,...) m(d,33,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M33(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M35(m,d,x,...) m(d,34,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M34(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M36(m,d,x,...) m(d,35,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M35(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M37(m,d,x,...) m(d,36,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M36(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M38(m,d,x,...) m(d,37,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M37(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M39(m,d,x,...) m(d,38,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M38(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M40(m,d,x,...) m(d,39,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M39(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M41(m,d,x,...) m(d,40,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M40(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M42(m,d,x,...) m(d,41,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M41(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M43(m,d,x,...) m(d,42,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M42(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M44(m,d,x,...) m(d,43,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M43(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M45(m,d,x,...) m(d,44,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M44(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M46(m,d,x,...) m(d,45,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M45(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M47(m,d,x,...) m(d,46,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M46(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M48(m,d,x,...) m(d,47,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M47(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M49(m,d,x,...) m(d,48,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M48(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M50(m,d,x,...) m(d,49,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M49(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M51(m,d,x,...) m(d,50,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M50(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M52(m,d,x,...) m(d,51,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M51(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M53(m,d,x,...) m(d,52,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M52(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M54(m,d,x,...) m(d,53,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M53(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M55(m,d,x,...) m(d,54,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M54(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M56(m,d,x,...) m(d,55,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M55(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M57(m,d,x,...) m(d,56,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M56(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M58(m,d,x,...) m(d,57,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M57(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M59(m,d,x,...) m(d,58,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M58(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M60(m,d,x,...) m(d,59,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M59(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M61(m,d,x,...) m(d,60,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M60(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M62(m,d,x,...) m(d,61,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M61(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M63(m,d,x,...) m(d,62,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M62(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_M64(m,d,x,...) m(d,63,x) \
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BETTER_ENUMS_ID(BETTER_ENUMS_M63(m,d,__VA_ARGS__))
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#define BETTER_ENUMS_PP_COUNT_IMPL(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, \
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_11, _12, _13, _14, _15, _16, _17, _18, _19, _20, _21, _22, _23, _24, _25, \
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_26, _27, _28, _29, _30, _31, _32, _33, _34, _35, _36, _37, _38, _39, _40, \
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_41, _42, _43, _44, _45, _46, _47, _48, _49, _50, _51, _52, _53, _54, _55, \
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_56, _57, _58, _59, _60, _61, _62, _63, _64, count, ...) count
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#define BETTER_ENUMS_PP_COUNT(...) \
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BETTER_ENUMS_ID(BETTER_ENUMS_PP_COUNT_IMPL(__VA_ARGS__, 64, 63, 62, 61, 60,\
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59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42,\
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41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24,\
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23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, \
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4, 3, 2, 1))
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|
|
#define BETTER_ENUMS_ITERATE(X, f, l) X(f, l, 0) X(f, l, 1) X(f, l, 2) \
|
|
X(f, l, 3) X(f, l, 4) X(f, l, 5) X(f, l, 6) X(f, l, 7) X(f, l, 8) \
|
|
X(f, l, 9) X(f, l, 10) X(f, l, 11) X(f, l, 12) X(f, l, 13) X(f, l, 14) \
|
|
X(f, l, 15) X(f, l, 16) X(f, l, 17) X(f, l, 18) X(f, l, 19) X(f, l, 20) \
|
|
X(f, l, 21) X(f, l, 22) X(f, l, 23)
|
|
|
|
#endif // #ifdef BETTER_ENUMS_MACRO_FILE else case
|
|
|
|
|
|
|
|
namespace better_enums {
|
|
|
|
|
|
// Optional type.
|
|
|
|
template <typename T>
|
|
BETTER_ENUMS_CONSTEXPR_ inline T _default()
|
|
{
|
|
return static_cast<typename T::_enumerated>(0);
|
|
}
|
|
|
|
template <>
|
|
BETTER_ENUMS_CONSTEXPR_ inline const char* _default<const char*>()
|
|
{
|
|
return BETTER_ENUMS_NULLPTR;
|
|
}
|
|
|
|
template <>
|
|
BETTER_ENUMS_CONSTEXPR_ inline std::size_t _default<std::size_t>()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
template <typename T>
|
|
struct optional {
|
|
BETTER_ENUMS_CONSTEXPR_ optional() :
|
|
_valid(false), _value(_default<T>()) { }
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ optional(T v) : _valid(true), _value(v) { }
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ const T& operator *() const { return _value; }
|
|
BETTER_ENUMS_CONSTEXPR_ const T* operator ->() const { return &_value; }
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ operator bool() const { return _valid; }
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ const T& value() const { return _value; }
|
|
|
|
private:
|
|
bool _valid;
|
|
T _value;
|
|
};
|
|
|
|
template <typename CastTo, typename Element>
|
|
BETTER_ENUMS_CONSTEXPR_ static optional<CastTo>
|
|
_map_index(const Element *array, optional<std::size_t> index)
|
|
{
|
|
return index ? static_cast<CastTo>(array[*index]) : optional<CastTo>();
|
|
}
|
|
|
|
#ifdef BETTER_ENUMS_VC2008_WORKAROUNDS
|
|
|
|
#define BETTER_ENUMS_OR_THROW \
|
|
if (!maybe) \
|
|
throw std::runtime_error(message); \
|
|
\
|
|
return *maybe;
|
|
|
|
#else
|
|
|
|
#define BETTER_ENUMS_OR_THROW \
|
|
return maybe ? *maybe : throw std::runtime_error(message);
|
|
|
|
#endif
|
|
|
|
BETTER_ENUMS_IF_EXCEPTIONS(
|
|
template <typename T>
|
|
BETTER_ENUMS_CONSTEXPR_ static T _or_throw(optional<T> maybe,
|
|
const char *message)
|
|
{
|
|
BETTER_ENUMS_OR_THROW
|
|
}
|
|
)
|
|
|
|
template <typename T>
|
|
BETTER_ENUMS_CONSTEXPR_ static T* _or_null(optional<T*> maybe)
|
|
{
|
|
return maybe ? *maybe : BETTER_ENUMS_NULLPTR;
|
|
}
|
|
|
|
template <typename T>
|
|
BETTER_ENUMS_CONSTEXPR_ static T _or_zero(optional<T> maybe)
|
|
{
|
|
return maybe ? *maybe : T::_from_integral_unchecked(0);
|
|
}
|
|
|
|
|
|
|
|
// Functional sequencing. This is essentially a comma operator wrapped in a
|
|
// constexpr function. g++ 4.7 doesn't "accept" integral constants in the second
|
|
// position for the comma operator, and emits an external symbol, which then
|
|
// causes a linking error.
|
|
|
|
template <typename T, typename U>
|
|
BETTER_ENUMS_CONSTEXPR_ U
|
|
continue_with(T, U value) { return value; }
|
|
|
|
|
|
|
|
// Values array declaration helper.
|
|
|
|
//! Get intrinsic value of an (Enum::value) by taking advantage of
|
|
// C-conversion's parentheses priority
|
|
template <typename EnumType>
|
|
struct _eat_assign {
|
|
explicit BETTER_ENUMS_CONSTEXPR_ _eat_assign(EnumType value) : _value(value)
|
|
{ }
|
|
|
|
template <typename Any>
|
|
BETTER_ENUMS_CONSTEXPR_ const _eat_assign&
|
|
operator =(Any) const { return *this; }
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ operator EnumType () const { return _value; }
|
|
|
|
private:
|
|
EnumType _value;
|
|
};
|
|
|
|
|
|
|
|
// Iterables.
|
|
|
|
template <typename Element>
|
|
struct _iterable {
|
|
typedef const Element* iterator;
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ iterator begin() const { return iterator(_array); }
|
|
BETTER_ENUMS_CONSTEXPR_ iterator end() const
|
|
{ return iterator(_array + _size); }
|
|
BETTER_ENUMS_CONSTEXPR_ std::size_t size() const { return _size; }
|
|
BETTER_ENUMS_CONSTEXPR_ const Element& operator [](std::size_t index) const
|
|
{ return _array[index]; }
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ _iterable(const Element *array, std::size_t s) :
|
|
_array(array), _size(s) { }
|
|
|
|
private:
|
|
const Element * const _array;
|
|
const std::size_t _size;
|
|
};
|
|
|
|
|
|
|
|
// String routines.
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ static const char *_name_enders = "= \t\n";
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ inline bool _ends_name(char c, std::size_t index = 0)
|
|
{
|
|
return
|
|
c == _name_enders[index] ? true :
|
|
_name_enders[index] == '\0' ? false :
|
|
_ends_name(c, index + 1);
|
|
}
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ inline bool _has_initializer(const char *s,
|
|
std::size_t index = 0)
|
|
{
|
|
return
|
|
s[index] == '\0' ? false :
|
|
s[index] == '=' ? true :
|
|
_has_initializer(s, index + 1);
|
|
}
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ inline std::size_t
|
|
_constant_length(const char *s, std::size_t index = 0)
|
|
{
|
|
return _ends_name(s[index]) ? index : _constant_length(s, index + 1);
|
|
}
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ inline char
|
|
_select(const char *from, std::size_t from_length, std::size_t index)
|
|
{
|
|
return index >= from_length ? '\0' : from[index];
|
|
}
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ inline char _to_lower_ascii(char c)
|
|
{
|
|
return c >= 0x41 && c <= 0x5A ? static_cast<char>(c + 0x20) : c;
|
|
}
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ inline bool _names_match(const char *stringizedName,
|
|
const char *referenceName,
|
|
std::size_t index = 0)
|
|
{
|
|
return
|
|
_ends_name(stringizedName[index]) ? referenceName[index] == '\0' :
|
|
referenceName[index] == '\0' ? false :
|
|
stringizedName[index] != referenceName[index] ? false :
|
|
_names_match(stringizedName, referenceName, index + 1);
|
|
}
|
|
|
|
BETTER_ENUMS_CONSTEXPR_ inline bool
|
|
_names_match_nocase(const char *stringizedName, const char *referenceName,
|
|
std::size_t index = 0)
|
|
{
|
|
return
|
|
_ends_name(stringizedName[index]) ? referenceName[index] == '\0' :
|
|
referenceName[index] == '\0' ? false :
|
|
_to_lower_ascii(stringizedName[index]) !=
|
|
_to_lower_ascii(referenceName[index]) ? false :
|
|
_names_match_nocase(stringizedName, referenceName, index + 1);
|
|
}
|
|
|
|
inline void _trim_names(const char * const *raw_names,
|
|
const char **trimmed_names,
|
|
char *storage, std::size_t count)
|
|
{
|
|
std::size_t offset = 0;
|
|
|
|
for (std::size_t index = 0; index < count; ++index) {
|
|
trimmed_names[index] = storage + offset;
|
|
|
|
std::size_t trimmed_length =
|
|
std::strcspn(raw_names[index], _name_enders);
|
|
storage[offset + trimmed_length] = '\0';
|
|
|
|
std::size_t raw_length = std::strlen(raw_names[index]);
|
|
offset += raw_length + 1;
|
|
}
|
|
}
|
|
|
|
|
|
|
|
// Eager initialization.
|
|
template <typename Enum>
|
|
struct _initialize_at_program_start {
|
|
_initialize_at_program_start() { Enum::initialize(); }
|
|
};
|
|
|
|
} // namespace better_enums
|
|
|
|
|
|
|
|
// Array generation macros.
|
|
|
|
#define BETTER_ENUMS_EAT_ASSIGN_SINGLE(EnumType, index, expression) \
|
|
(EnumType)((::better_enums::_eat_assign<EnumType>)EnumType::expression),
|
|
|
|
#define BETTER_ENUMS_EAT_ASSIGN(EnumType, ...) \
|
|
BETTER_ENUMS_ID( \
|
|
BETTER_ENUMS_PP_MAP( \
|
|
BETTER_ENUMS_EAT_ASSIGN_SINGLE, EnumType, __VA_ARGS__))
|
|
|
|
|
|
|
|
#ifdef BETTER_ENUMS_HAVE_CONSTEXPR
|
|
|
|
|
|
|
|
#define BETTER_ENUMS_SELECT_SINGLE_CHARACTER(from, from_length, index) \
|
|
::better_enums::_select(from, from_length, index),
|
|
|
|
#define BETTER_ENUMS_SELECT_CHARACTERS(from, from_length) \
|
|
BETTER_ENUMS_ITERATE( \
|
|
BETTER_ENUMS_SELECT_SINGLE_CHARACTER, from, from_length)
|
|
|
|
|
|
|
|
#define BETTER_ENUMS_TRIM_SINGLE_STRING(ignored, index, expression) \
|
|
constexpr std::size_t _length_ ## index = \
|
|
::better_enums::_constant_length(#expression); \
|
|
constexpr const char _trimmed_ ## index [] = \
|
|
{ BETTER_ENUMS_SELECT_CHARACTERS(#expression, _length_ ## index) }; \
|
|
constexpr const char *_final_ ## index = \
|
|
::better_enums::_has_initializer(#expression) ? \
|
|
_trimmed_ ## index : #expression;
|
|
|
|
#define BETTER_ENUMS_TRIM_STRINGS(...) \
|
|
BETTER_ENUMS_ID( \
|
|
BETTER_ENUMS_PP_MAP( \
|
|
BETTER_ENUMS_TRIM_SINGLE_STRING, ignored, __VA_ARGS__))
|
|
|
|
|
|
|
|
#define BETTER_ENUMS_REFER_TO_SINGLE_STRING(ignored, index, expression) \
|
|
_final_ ## index,
|
|
|
|
#define BETTER_ENUMS_REFER_TO_STRINGS(...) \
|
|
BETTER_ENUMS_ID( \
|
|
BETTER_ENUMS_PP_MAP( \
|
|
BETTER_ENUMS_REFER_TO_SINGLE_STRING, ignored, __VA_ARGS__))
|
|
|
|
|
|
|
|
#endif // #ifdef BETTER_ENUMS_HAVE_CONSTEXPR
|
|
|
|
|
|
|
|
#define BETTER_ENUMS_STRINGIZE_SINGLE(ignored, index, expression) #expression,
|
|
|
|
#define BETTER_ENUMS_STRINGIZE(...) \
|
|
BETTER_ENUMS_ID( \
|
|
BETTER_ENUMS_PP_MAP( \
|
|
BETTER_ENUMS_STRINGIZE_SINGLE, ignored, __VA_ARGS__))
|
|
|
|
#define BETTER_ENUMS_RESERVE_STORAGE_SINGLE(ignored, index, expression) \
|
|
#expression ","
|
|
|
|
#define BETTER_ENUMS_RESERVE_STORAGE(...) \
|
|
BETTER_ENUMS_ID( \
|
|
BETTER_ENUMS_PP_MAP( \
|
|
BETTER_ENUMS_RESERVE_STORAGE_SINGLE, ignored, __VA_ARGS__))
|
|
|
|
|
|
|
|
// The enums proper.
|
|
|
|
#define BETTER_ENUMS_NS(EnumType) better_enums_data_ ## EnumType
|
|
|
|
#ifdef BETTER_ENUMS_VC2008_WORKAROUNDS
|
|
|
|
#define BETTER_ENUMS_COPY_CONSTRUCTOR(Enum) \
|
|
BETTER_ENUMS_CONSTEXPR_ Enum(const Enum &other) : \
|
|
_value(other._value) { }
|
|
|
|
#else
|
|
|
|
#define BETTER_ENUMS_COPY_CONSTRUCTOR(Enum)
|
|
|
|
#endif
|
|
|
|
#ifndef BETTER_ENUMS_CLASS_ATTRIBUTE
|
|
# define BETTER_ENUMS_CLASS_ATTRIBUTE
|
|
#endif
|
|
|
|
#define BETTER_ENUMS_TYPE(SetUnderlyingType, SwitchType, GenerateSwitchType, \
|
|
GenerateStrings, ToStringConstexpr, \
|
|
DeclareInitialize, DefineInitialize, CallInitialize, \
|
|
Enum, Underlying, ...) \
|
|
\
|
|
namespace better_enums_data_ ## Enum { \
|
|
\
|
|
BETTER_ENUMS_ID(GenerateSwitchType(Underlying, __VA_ARGS__)) \
|
|
\
|
|
} \
|
|
\
|
|
class BETTER_ENUMS_CLASS_ATTRIBUTE Enum { \
|
|
private: \
|
|
typedef ::better_enums::optional<Enum> _optional; \
|
|
typedef ::better_enums::optional<std::size_t> _optional_index; \
|
|
\
|
|
public: \
|
|
typedef Underlying _integral; \
|
|
\
|
|
enum _enumerated SetUnderlyingType(Underlying) { __VA_ARGS__ }; \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ Enum(_enumerated value) : _value(value) { } \
|
|
\
|
|
BETTER_ENUMS_COPY_CONSTRUCTOR(Enum) \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ operator SwitchType(Enum)() const \
|
|
{ \
|
|
return SwitchType(Enum)(_value); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ _integral _to_integral() const; \
|
|
BETTER_ENUMS_IF_EXCEPTIONS( \
|
|
BETTER_ENUMS_CONSTEXPR_ static Enum _from_integral(_integral value); \
|
|
) \
|
|
BETTER_ENUMS_CONSTEXPR_ static Enum \
|
|
_from_integral_unchecked(_integral value); \
|
|
BETTER_ENUMS_CONSTEXPR_ static _optional \
|
|
_from_integral_nothrow(_integral value); \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ std::size_t _to_index() const; \
|
|
BETTER_ENUMS_IF_EXCEPTIONS( \
|
|
BETTER_ENUMS_CONSTEXPR_ static Enum _from_index(std::size_t index); \
|
|
) \
|
|
BETTER_ENUMS_CONSTEXPR_ static Enum \
|
|
_from_index_unchecked(std::size_t index); \
|
|
BETTER_ENUMS_CONSTEXPR_ static _optional \
|
|
_from_index_nothrow(std::size_t index); \
|
|
\
|
|
ToStringConstexpr const char* _to_string() const; \
|
|
BETTER_ENUMS_IF_EXCEPTIONS( \
|
|
BETTER_ENUMS_CONSTEXPR_ static Enum _from_string(const char *name); \
|
|
) \
|
|
BETTER_ENUMS_CONSTEXPR_ static _optional \
|
|
_from_string_nothrow(const char *name); \
|
|
\
|
|
BETTER_ENUMS_IF_EXCEPTIONS( \
|
|
BETTER_ENUMS_CONSTEXPR_ static Enum _from_string_nocase(const char *name); \
|
|
) \
|
|
BETTER_ENUMS_CONSTEXPR_ static _optional \
|
|
_from_string_nocase_nothrow(const char *name); \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ static bool _is_valid(_integral value); \
|
|
BETTER_ENUMS_CONSTEXPR_ static bool _is_valid(const char *name); \
|
|
BETTER_ENUMS_CONSTEXPR_ static bool _is_valid_nocase(const char *name); \
|
|
\
|
|
typedef ::better_enums::_iterable<Enum> _value_iterable; \
|
|
typedef ::better_enums::_iterable<const char*> _name_iterable; \
|
|
\
|
|
typedef _value_iterable::iterator _value_iterator; \
|
|
typedef _name_iterable::iterator _name_iterator; \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ static const std::size_t _size_constant = \
|
|
BETTER_ENUMS_ID(BETTER_ENUMS_PP_COUNT(__VA_ARGS__)); \
|
|
BETTER_ENUMS_CONSTEXPR_ static std::size_t _size() \
|
|
{ return _size_constant; } \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ static const char* _name(); \
|
|
BETTER_ENUMS_CONSTEXPR_ static _value_iterable _values(); \
|
|
ToStringConstexpr static _name_iterable _names(); \
|
|
\
|
|
_integral _value; \
|
|
\
|
|
BETTER_ENUMS_DEFAULT_CONSTRUCTOR(Enum) \
|
|
\
|
|
private: \
|
|
explicit BETTER_ENUMS_CONSTEXPR_ Enum(const _integral &value) : \
|
|
_value(value) { } \
|
|
\
|
|
DeclareInitialize \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ static _optional_index \
|
|
_from_value_loop(_integral value, std::size_t index = 0); \
|
|
BETTER_ENUMS_CONSTEXPR_ static _optional_index \
|
|
_from_string_loop(const char *name, std::size_t index = 0); \
|
|
BETTER_ENUMS_CONSTEXPR_ static _optional_index \
|
|
_from_string_nocase_loop(const char *name, std::size_t index = 0); \
|
|
\
|
|
friend struct ::better_enums::_initialize_at_program_start<Enum>; \
|
|
}; \
|
|
\
|
|
namespace better_enums_data_ ## Enum { \
|
|
\
|
|
static ::better_enums::_initialize_at_program_start<Enum> \
|
|
_force_initialization; \
|
|
\
|
|
enum _putNamesInThisScopeAlso { __VA_ARGS__ }; \
|
|
\
|
|
BETTER_ENUMS_IGNORE_OLD_CAST_HEADER \
|
|
BETTER_ENUMS_IGNORE_OLD_CAST_BEGIN \
|
|
BETTER_ENUMS_CONSTEXPR_ const Enum _value_array[] = \
|
|
{ BETTER_ENUMS_ID(BETTER_ENUMS_EAT_ASSIGN(Enum, __VA_ARGS__)) }; \
|
|
BETTER_ENUMS_IGNORE_OLD_CAST_END \
|
|
\
|
|
BETTER_ENUMS_ID(GenerateStrings(Enum, __VA_ARGS__)) \
|
|
\
|
|
} \
|
|
\
|
|
BETTER_ENUMS_IGNORE_ATTRIBUTES_HEADER \
|
|
BETTER_ENUMS_IGNORE_ATTRIBUTES_BEGIN \
|
|
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
|
|
inline const Enum \
|
|
operator +(Enum::_enumerated enumerated) \
|
|
{ \
|
|
return static_cast<Enum>(enumerated); \
|
|
} \
|
|
BETTER_ENUMS_IGNORE_ATTRIBUTES_END \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional_index \
|
|
Enum::_from_value_loop(Enum::_integral value, std::size_t index) \
|
|
{ \
|
|
return \
|
|
index == _size() ? \
|
|
_optional_index() : \
|
|
BETTER_ENUMS_NS(Enum)::_value_array[index]._value == value ? \
|
|
_optional_index(index) : \
|
|
_from_value_loop(value, index + 1); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional_index \
|
|
Enum::_from_string_loop(const char *name, std::size_t index) \
|
|
{ \
|
|
return \
|
|
index == _size() ? _optional_index() : \
|
|
::better_enums::_names_match( \
|
|
BETTER_ENUMS_NS(Enum)::_raw_names()[index], name) ? \
|
|
_optional_index(index) : \
|
|
_from_string_loop(name, index + 1); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional_index \
|
|
Enum::_from_string_nocase_loop(const char *name, std::size_t index) \
|
|
{ \
|
|
return \
|
|
index == _size() ? _optional_index() : \
|
|
::better_enums::_names_match_nocase( \
|
|
BETTER_ENUMS_NS(Enum)::_raw_names()[index], name) ? \
|
|
_optional_index(index) : \
|
|
_from_string_nocase_loop(name, index + 1); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum::_integral Enum::_to_integral() const \
|
|
{ \
|
|
return _integral(_value); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline std::size_t Enum::_to_index() const \
|
|
{ \
|
|
return *_from_value_loop(_value); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum \
|
|
Enum::_from_index_unchecked(std::size_t index) \
|
|
{ \
|
|
return \
|
|
::better_enums::_or_zero(_from_index_nothrow(index)); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional \
|
|
Enum::_from_index_nothrow(std::size_t index) \
|
|
{ \
|
|
return \
|
|
index >= _size() ? \
|
|
_optional() : \
|
|
_optional(BETTER_ENUMS_NS(Enum)::_value_array[index]); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_IF_EXCEPTIONS( \
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum Enum::_from_index(std::size_t index) \
|
|
{ \
|
|
return \
|
|
::better_enums::_or_throw(_from_index_nothrow(index), \
|
|
#Enum "::_from_index: invalid argument"); \
|
|
} \
|
|
) \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum \
|
|
Enum::_from_integral_unchecked(_integral value) \
|
|
{ \
|
|
return static_cast<_enumerated>(value); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional \
|
|
Enum::_from_integral_nothrow(_integral value) \
|
|
{ \
|
|
return \
|
|
::better_enums::_map_index<Enum>(BETTER_ENUMS_NS(Enum)::_value_array, \
|
|
_from_value_loop(value)); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_IF_EXCEPTIONS( \
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum Enum::_from_integral(_integral value) \
|
|
{ \
|
|
return \
|
|
::better_enums::_or_throw(_from_integral_nothrow(value), \
|
|
#Enum "::_from_integral: invalid argument"); \
|
|
} \
|
|
) \
|
|
\
|
|
ToStringConstexpr inline const char* Enum::_to_string() const \
|
|
{ \
|
|
return \
|
|
::better_enums::_or_null( \
|
|
::better_enums::_map_index<const char*>( \
|
|
BETTER_ENUMS_NS(Enum)::_name_array(), \
|
|
_from_value_loop(CallInitialize(_value)))); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional \
|
|
Enum::_from_string_nothrow(const char *name) \
|
|
{ \
|
|
return \
|
|
::better_enums::_map_index<Enum>( \
|
|
BETTER_ENUMS_NS(Enum)::_value_array, _from_string_loop(name)); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_IF_EXCEPTIONS( \
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum Enum::_from_string(const char *name) \
|
|
{ \
|
|
return \
|
|
::better_enums::_or_throw(_from_string_nothrow(name), \
|
|
#Enum "::_from_string: invalid argument"); \
|
|
} \
|
|
) \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional \
|
|
Enum::_from_string_nocase_nothrow(const char *name) \
|
|
{ \
|
|
return \
|
|
::better_enums::_map_index<Enum>(BETTER_ENUMS_NS(Enum)::_value_array, \
|
|
_from_string_nocase_loop(name)); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_IF_EXCEPTIONS( \
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum Enum::_from_string_nocase(const char *name)\
|
|
{ \
|
|
return \
|
|
::better_enums::_or_throw( \
|
|
_from_string_nocase_nothrow(name), \
|
|
#Enum "::_from_string_nocase: invalid argument"); \
|
|
} \
|
|
) \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline bool Enum::_is_valid(_integral value) \
|
|
{ \
|
|
return _from_value_loop(value); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline bool Enum::_is_valid(const char *name) \
|
|
{ \
|
|
return _from_string_loop(name); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline bool Enum::_is_valid_nocase(const char *name) \
|
|
{ \
|
|
return _from_string_nocase_loop(name); \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline const char* Enum::_name() \
|
|
{ \
|
|
return #Enum; \
|
|
} \
|
|
\
|
|
BETTER_ENUMS_CONSTEXPR_ inline Enum::_value_iterable Enum::_values() \
|
|
{ \
|
|
return _value_iterable(BETTER_ENUMS_NS(Enum)::_value_array, _size()); \
|
|
} \
|
|
\
|
|
ToStringConstexpr inline Enum::_name_iterable Enum::_names() \
|
|
{ \
|
|
return \
|
|
_name_iterable(BETTER_ENUMS_NS(Enum)::_name_array(), \
|
|
CallInitialize(_size())); \
|
|
} \
|
|
\
|
|
DefineInitialize(Enum) \
|
|
\
|
|
BETTER_ENUMS_IGNORE_ATTRIBUTES_HEADER \
|
|
BETTER_ENUMS_IGNORE_ATTRIBUTES_BEGIN \
|
|
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
|
|
inline bool operator ==(const Enum &a, const Enum &b) \
|
|
{ return a._to_integral() == b._to_integral(); } \
|
|
\
|
|
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
|
|
inline bool operator !=(const Enum &a, const Enum &b) \
|
|
{ return a._to_integral() != b._to_integral(); } \
|
|
\
|
|
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
|
|
inline bool operator <(const Enum &a, const Enum &b) \
|
|
{ return a._to_integral() < b._to_integral(); } \
|
|
\
|
|
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
|
|
inline bool operator <=(const Enum &a, const Enum &b) \
|
|
{ return a._to_integral() <= b._to_integral(); } \
|
|
\
|
|
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
|
|
inline bool operator >(const Enum &a, const Enum &b) \
|
|
{ return a._to_integral() > b._to_integral(); } \
|
|
\
|
|
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
|
|
inline bool operator >=(const Enum &a, const Enum &b) \
|
|
{ return a._to_integral() >= b._to_integral(); } \
|
|
BETTER_ENUMS_IGNORE_ATTRIBUTES_END \
|
|
\
|
|
\
|
|
template <typename Char, typename Traits> \
|
|
std::basic_ostream<Char, Traits>& \
|
|
operator <<(std::basic_ostream<Char, Traits>& stream, const Enum &value) \
|
|
{ \
|
|
return stream << value._to_string(); \
|
|
} \
|
|
\
|
|
template <typename Char, typename Traits> \
|
|
std::basic_istream<Char, Traits>& \
|
|
operator >>(std::basic_istream<Char, Traits>& stream, Enum &value) \
|
|
{ \
|
|
std::basic_string<Char, Traits> buffer; \
|
|
\
|
|
stream >> buffer; \
|
|
::better_enums::optional<Enum> converted = \
|
|
Enum::_from_string_nothrow(buffer.c_str()); \
|
|
\
|
|
if (converted) \
|
|
value = *converted; \
|
|
else \
|
|
stream.setstate(std::basic_istream<Char, Traits>::failbit); \
|
|
\
|
|
return stream; \
|
|
}
|
|
|
|
|
|
|
|
// Enum feature options.
|
|
|
|
// C++98, C++11
|
|
#define BETTER_ENUMS_CXX98_UNDERLYING_TYPE(Underlying)
|
|
|
|
// C++11
|
|
#define BETTER_ENUMS_CXX11_UNDERLYING_TYPE(Underlying) \
|
|
: Underlying
|
|
|
|
#if defined(_MSC_VER) && _MSC_VER >= 1700
|
|
// VS 2012 and above fully support strongly typed enums and will warn about
|
|
// incorrect usage.
|
|
# define BETTER_ENUMS_LEGACY_UNDERLYING_TYPE(Underlying) \
|
|
BETTER_ENUMS_CXX11_UNDERLYING_TYPE(Underlying)
|
|
#else
|
|
# define BETTER_ENUMS_LEGACY_UNDERLYING_TYPE(Underlying) \
|
|
BETTER_ENUMS_CXX98_UNDERLYING_TYPE(Underlying)
|
|
#endif
|
|
|
|
// C++98, C++11
|
|
#define BETTER_ENUMS_REGULAR_ENUM_SWITCH_TYPE(Type) \
|
|
_enumerated
|
|
|
|
// C++11
|
|
#define BETTER_ENUMS_ENUM_CLASS_SWITCH_TYPE(Type) \
|
|
BETTER_ENUMS_NS(Type)::_enumClassForSwitchStatements
|
|
|
|
// C++98, C++11
|
|
#define BETTER_ENUMS_REGULAR_ENUM_SWITCH_TYPE_GENERATE(Underlying, ...)
|
|
|
|
// C++11
|
|
#define BETTER_ENUMS_ENUM_CLASS_SWITCH_TYPE_GENERATE(Underlying, ...) \
|
|
enum class _enumClassForSwitchStatements : Underlying { __VA_ARGS__ };
|
|
|
|
// C++98
|
|
#define BETTER_ENUMS_CXX98_TRIM_STRINGS_ARRAYS(Enum, ...) \
|
|
inline const char** _raw_names() \
|
|
{ \
|
|
static const char *value[] = \
|
|
{ BETTER_ENUMS_ID(BETTER_ENUMS_STRINGIZE(__VA_ARGS__)) }; \
|
|
return value; \
|
|
} \
|
|
\
|
|
inline char* _name_storage() \
|
|
{ \
|
|
static char storage[] = \
|
|
BETTER_ENUMS_ID(BETTER_ENUMS_RESERVE_STORAGE(__VA_ARGS__)); \
|
|
return storage; \
|
|
} \
|
|
\
|
|
inline const char** _name_array() \
|
|
{ \
|
|
static const char *value[Enum::_size_constant]; \
|
|
return value; \
|
|
} \
|
|
\
|
|
inline bool& _initialized() \
|
|
{ \
|
|
static bool value = false; \
|
|
return value; \
|
|
}
|
|
|
|
// C++11 fast version
|
|
#define BETTER_ENUMS_CXX11_PARTIAL_CONSTEXPR_TRIM_STRINGS_ARRAYS(Enum, ...) \
|
|
constexpr const char *_the_raw_names[] = \
|
|
{ BETTER_ENUMS_ID(BETTER_ENUMS_STRINGIZE(__VA_ARGS__)) }; \
|
|
\
|
|
constexpr const char * const * _raw_names() \
|
|
{ \
|
|
return _the_raw_names; \
|
|
} \
|
|
\
|
|
inline char* _name_storage() \
|
|
{ \
|
|
static char storage[] = \
|
|
BETTER_ENUMS_ID(BETTER_ENUMS_RESERVE_STORAGE(__VA_ARGS__)); \
|
|
return storage; \
|
|
} \
|
|
\
|
|
inline const char** _name_array() \
|
|
{ \
|
|
static const char *value[Enum::_size_constant]; \
|
|
return value; \
|
|
} \
|
|
\
|
|
inline bool& _initialized() \
|
|
{ \
|
|
static bool value = false; \
|
|
return value; \
|
|
}
|
|
|
|
// C++11 slow all-constexpr version
|
|
#define BETTER_ENUMS_CXX11_FULL_CONSTEXPR_TRIM_STRINGS_ARRAYS(Enum, ...) \
|
|
BETTER_ENUMS_ID(BETTER_ENUMS_TRIM_STRINGS(__VA_ARGS__)) \
|
|
\
|
|
constexpr const char * const _the_name_array[] = \
|
|
{ BETTER_ENUMS_ID(BETTER_ENUMS_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 BETTER_ENUMS_NO_CONSTEXPR_TO_STRING_KEYWORD
|
|
|
|
// C++11 slow all-constexpr version
|
|
#define BETTER_ENUMS_CONSTEXPR_TO_STRING_KEYWORD \
|
|
constexpr
|
|
|
|
// C++98, C++11 fast version
|
|
#define BETTER_ENUMS_DO_DECLARE_INITIALIZE \
|
|
static int initialize();
|
|
|
|
// C++11 slow all-constexpr version
|
|
#define BETTER_ENUMS_DECLARE_EMPTY_INITIALIZE \
|
|
static int initialize() { return 0; }
|
|
|
|
// C++98, C++11 fast version
|
|
#define BETTER_ENUMS_DO_DEFINE_INITIALIZE(Enum) \
|
|
inline int Enum::initialize() \
|
|
{ \
|
|
if (BETTER_ENUMS_NS(Enum)::_initialized()) \
|
|
return 0; \
|
|
\
|
|
::better_enums::_trim_names(BETTER_ENUMS_NS(Enum)::_raw_names(), \
|
|
BETTER_ENUMS_NS(Enum)::_name_array(), \
|
|
BETTER_ENUMS_NS(Enum)::_name_storage(), \
|
|
_size()); \
|
|
\
|
|
BETTER_ENUMS_NS(Enum)::_initialized() = true; \
|
|
\
|
|
return 0; \
|
|
}
|
|
|
|
// C++11 slow all-constexpr version
|
|
#define BETTER_ENUMS_DO_NOT_DEFINE_INITIALIZE(Enum)
|
|
|
|
// C++98, C++11 fast version
|
|
#define BETTER_ENUMS_DO_CALL_INITIALIZE(value) \
|
|
::better_enums::continue_with(initialize(), value)
|
|
|
|
// C++11 slow all-constexpr version
|
|
#define BETTER_ENUMS_DO_NOT_CALL_INITIALIZE(value) \
|
|
value
|
|
|
|
|
|
|
|
// User feature selection.
|
|
|
|
#ifdef BETTER_ENUMS_STRICT_CONVERSION
|
|
# define BETTER_ENUMS_DEFAULT_SWITCH_TYPE \
|
|
BETTER_ENUMS_ENUM_CLASS_SWITCH_TYPE
|
|
# define BETTER_ENUMS_DEFAULT_SWITCH_TYPE_GENERATE \
|
|
BETTER_ENUMS_ENUM_CLASS_SWITCH_TYPE_GENERATE
|
|
#else
|
|
# define BETTER_ENUMS_DEFAULT_SWITCH_TYPE \
|
|
BETTER_ENUMS_REGULAR_ENUM_SWITCH_TYPE
|
|
# define BETTER_ENUMS_DEFAULT_SWITCH_TYPE_GENERATE \
|
|
BETTER_ENUMS_REGULAR_ENUM_SWITCH_TYPE_GENERATE
|
|
#endif
|
|
|
|
|
|
|
|
#ifndef BETTER_ENUMS_DEFAULT_CONSTRUCTOR
|
|
# define BETTER_ENUMS_DEFAULT_CONSTRUCTOR(Enum) \
|
|
private: \
|
|
Enum() : _value(0) { }
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef BETTER_ENUMS_HAVE_CONSTEXPR
|
|
|
|
#ifdef BETTER_ENUMS_CONSTEXPR_TO_STRING
|
|
# define BETTER_ENUMS_DEFAULT_TRIM_STRINGS_ARRAYS \
|
|
BETTER_ENUMS_CXX11_FULL_CONSTEXPR_TRIM_STRINGS_ARRAYS
|
|
# define BETTER_ENUMS_DEFAULT_TO_STRING_KEYWORD \
|
|
BETTER_ENUMS_CONSTEXPR_TO_STRING_KEYWORD
|
|
# define BETTER_ENUMS_DEFAULT_DECLARE_INITIALIZE \
|
|
BETTER_ENUMS_DECLARE_EMPTY_INITIALIZE
|
|
# define BETTER_ENUMS_DEFAULT_DEFINE_INITIALIZE \
|
|
BETTER_ENUMS_DO_NOT_DEFINE_INITIALIZE
|
|
# define BETTER_ENUMS_DEFAULT_CALL_INITIALIZE \
|
|
BETTER_ENUMS_DO_NOT_CALL_INITIALIZE
|
|
#else
|
|
# define BETTER_ENUMS_DEFAULT_TRIM_STRINGS_ARRAYS \
|
|
BETTER_ENUMS_CXX11_PARTIAL_CONSTEXPR_TRIM_STRINGS_ARRAYS
|
|
# define BETTER_ENUMS_DEFAULT_TO_STRING_KEYWORD \
|
|
BETTER_ENUMS_NO_CONSTEXPR_TO_STRING_KEYWORD
|
|
# define BETTER_ENUMS_DEFAULT_DECLARE_INITIALIZE \
|
|
BETTER_ENUMS_DO_DECLARE_INITIALIZE
|
|
# define BETTER_ENUMS_DEFAULT_DEFINE_INITIALIZE \
|
|
BETTER_ENUMS_DO_DEFINE_INITIALIZE
|
|
# define BETTER_ENUMS_DEFAULT_CALL_INITIALIZE \
|
|
BETTER_ENUMS_DO_CALL_INITIALIZE
|
|
#endif
|
|
|
|
|
|
|
|
// Top-level macros.
|
|
|
|
#define BETTER_ENUM(Enum, Underlying, ...) \
|
|
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_DECLARE_INITIALIZE, \
|
|
BETTER_ENUMS_DEFAULT_DEFINE_INITIALIZE, \
|
|
BETTER_ENUMS_DEFAULT_CALL_INITIALIZE, \
|
|
Enum, Underlying, __VA_ARGS__))
|
|
|
|
#define SLOW_ENUM(Enum, Underlying, ...) \
|
|
BETTER_ENUMS_ID(BETTER_ENUMS_TYPE( \
|
|
BETTER_ENUMS_CXX11_UNDERLYING_TYPE, \
|
|
BETTER_ENUMS_DEFAULT_SWITCH_TYPE, \
|
|
BETTER_ENUMS_DEFAULT_SWITCH_TYPE_GENERATE, \
|
|
BETTER_ENUMS_CXX11_FULL_CONSTEXPR_TRIM_STRINGS_ARRAYS, \
|
|
BETTER_ENUMS_CONSTEXPR_TO_STRING_KEYWORD, \
|
|
BETTER_ENUMS_DECLARE_EMPTY_INITIALIZE, \
|
|
BETTER_ENUMS_DO_NOT_DEFINE_INITIALIZE, \
|
|
BETTER_ENUMS_DO_NOT_CALL_INITIALIZE, \
|
|
Enum, Underlying, __VA_ARGS__))
|
|
|
|
#else
|
|
|
|
#define BETTER_ENUM(Enum, Underlying, ...) \
|
|
BETTER_ENUMS_ID(BETTER_ENUMS_TYPE( \
|
|
BETTER_ENUMS_LEGACY_UNDERLYING_TYPE, \
|
|
BETTER_ENUMS_DEFAULT_SWITCH_TYPE, \
|
|
BETTER_ENUMS_DEFAULT_SWITCH_TYPE_GENERATE, \
|
|
BETTER_ENUMS_CXX98_TRIM_STRINGS_ARRAYS, \
|
|
BETTER_ENUMS_NO_CONSTEXPR_TO_STRING_KEYWORD, \
|
|
BETTER_ENUMS_DO_DECLARE_INITIALIZE, \
|
|
BETTER_ENUMS_DO_DEFINE_INITIALIZE, \
|
|
BETTER_ENUMS_DO_CALL_INITIALIZE, \
|
|
Enum, Underlying, __VA_ARGS__))
|
|
|
|
#endif
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namespace better_enums {
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// Maps.
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template <typename T>
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struct map_compare {
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BETTER_ENUMS_CONSTEXPR_ static bool less(const T& a, const T& b)
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{ return a < b; }
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};
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template <>
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struct map_compare<const char*> {
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BETTER_ENUMS_CONSTEXPR_ static bool less(const char *a, const char *b)
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{ return less_loop(a, b); }
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private:
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BETTER_ENUMS_CONSTEXPR_ static bool
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less_loop(const char *a, const char *b, size_t index = 0)
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{
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return
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a[index] != b[index] ? a[index] < b[index] :
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a[index] == '\0' ? false :
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less_loop(a, b, index + 1);
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}
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};
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template <>
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struct map_compare<const wchar_t*> {
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BETTER_ENUMS_CONSTEXPR_ static bool less(const wchar_t *a, const wchar_t *b)
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{ return less_loop(a, b); }
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private:
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BETTER_ENUMS_CONSTEXPR_ static bool
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less_loop(const wchar_t *a, const wchar_t *b, size_t index = 0)
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{
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return
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a[index] != b[index] ? a[index] < b[index] :
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a[index] == L'\0' ? false :
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less_loop(a, b, index + 1);
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}
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};
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template <typename Enum, typename T, typename Compare = map_compare<T> >
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struct map {
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typedef T (*function)(Enum);
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BETTER_ENUMS_CONSTEXPR_ explicit map(function f) : _f(f) { }
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BETTER_ENUMS_CONSTEXPR_ T from_enum(Enum value) const { return _f(value); }
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BETTER_ENUMS_CONSTEXPR_ T operator [](Enum value) const
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{ return _f(value); }
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BETTER_ENUMS_CONSTEXPR_ Enum to_enum(T value) const
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{
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return
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_or_throw(to_enum_nothrow(value), "map::to_enum: invalid argument");
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}
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BETTER_ENUMS_CONSTEXPR_ optional<Enum>
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to_enum_nothrow(T value, size_t index = 0) const
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{
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return
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index >= Enum::_size() ? optional<Enum>() :
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Compare::less(_f(Enum::_values()[index]), value) ||
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Compare::less(value, _f(Enum::_values()[index])) ?
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to_enum_nothrow(value, index + 1) :
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Enum::_values()[index];
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}
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private:
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const function _f;
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};
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template <typename Enum, typename T>
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BETTER_ENUMS_CONSTEXPR_ map<Enum, T> make_map(T (*f)(Enum))
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{
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return map<Enum, T>(f);
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}
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}
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#define BETTER_ENUMS_DECLARE_STD_HASH(type) \
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namespace std { \
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template <> struct hash<type> \
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{ \
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size_t operator()(const type &x) const \
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{ \
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return std::hash<size_t>()(x._to_integral()); \
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} \
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}; \
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}
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#endif // #ifndef BETTER_ENUMS_ENUM_H
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