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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkTypedEnum_DEFINED
#define SkTypedEnum_DEFINED
#include "SkPreprocessorSeq.h"
//Compatibility with non-clang compilers.
#ifndef __has_feature
#define __has_feature(x) 0
#endif
#ifndef __has_extension
#define __has_extension __has_feature
#endif
//Detect if typed enums are supported.
#if defined(_MSC_VER)
#define SK_TYPED_ENUMS
#elif defined(__clang__) && __has_extension(cxx_strong_enums)
#define SK_TYPED_ENUMS
// Scoped enums are buggy in GCC 4.4.0 through 4.5.1.
// See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38064
// __cplusplus should actually be accurate now.
// See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=1773
#elif defined(__GNUC__) && (((__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__ >= 40501) && defined(__GXX_EXPERIMENTAL_CXX0X__)) || __cplusplus >= 201103L)
#define SK_TYPED_ENUMS
#endif
//Define what a typed enum looks like.
#ifdef SK_TYPED_ENUMS
#define SK_TYPED_ENUM_VALUES(data, elem) \
SK_PAIR_FIRST(elem) = SK_PAIR_SECOND(elem),
#define SK_TYPED_ENUM_IDS(data, elem) \
elem,
#define SK_TYPED_ENUM_IDS_L(data, elem) \
elem
#define SK_TYPED_ENUM(enumName, enumType, enumSeq, idSeq) \
enum enumName : enumType { \
SK_SEQ_FOREACH(SK_TYPED_ENUM_VALUES, _, enumSeq) \
} SK_SEQ_FOREACH_L(SK_TYPED_ENUM_IDS, SK_TYPED_ENUM_IDS_L, _, idSeq);
#else
#define SK_TYPED_ENUM_VALUES(enumType, elem) \
static const enumType SK_PAIR_FIRST(elem) = SK_PAIR_SECOND(elem);
#define SK_TYPED_ENUM_IDS(enumType, elem) \
enumType elem;
#define SK_TYPED_ENUM(enumName, enumType, enumSeq, idSeq) \
typedef enumType enumName; \
SK_SEQ_FOREACH(SK_TYPED_ENUM_VALUES, enumType, enumSeq) \
SK_SEQ_FOREACH(SK_TYPED_ENUM_IDS, enumType, idSeq)
#endif
#endif
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