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      1 //===- ASTBitCodes.h - Enum values for the PCH bitcode format ---*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This header defines Bitcode enum values for Clang serialized AST files.
     11 //
     12 // The enum values defined in this file should be considered permanent.  If
     13 // new features are added, they should have values added at the end of the
     14 // respective lists.
     15 //
     16 //===----------------------------------------------------------------------===//
     17 #ifndef LLVM_CLANG_FRONTEND_PCHBITCODES_H
     18 #define LLVM_CLANG_FRONTEND_PCHBITCODES_H
     19 
     20 #include "clang/AST/Type.h"
     21 #include "llvm/Bitcode/BitCodes.h"
     22 #include "llvm/Support/DataTypes.h"
     23 #include "llvm/ADT/DenseMap.h"
     24 
     25 namespace clang {
     26   namespace serialization {
     27     /// \brief AST file major version number supported by this version of
     28     /// Clang.
     29     ///
     30     /// Whenever the AST file format changes in a way that makes it
     31     /// incompatible with previous versions (such that a reader
     32     /// designed for the previous version could not support reading
     33     /// the new version), this number should be increased.
     34     ///
     35     /// Version 4 of AST files also requires that the version control branch and
     36     /// revision match exactly, since there is no backward compatibility of
     37     /// AST files at this time.
     38     const unsigned VERSION_MAJOR = 4;
     39 
     40     /// \brief AST file minor version number supported by this version of
     41     /// Clang.
     42     ///
     43     /// Whenever the AST format changes in a way that is still
     44     /// compatible with previous versions (such that a reader designed
     45     /// for the previous version could still support reading the new
     46     /// version by ignoring new kinds of subblocks), this number
     47     /// should be increased.
     48     const unsigned VERSION_MINOR = 0;
     49 
     50     /// \brief An ID number that refers to an identifier in an AST file.
     51     ///
     52     /// The ID numbers of identifiers are consecutive (in order of discovery)
     53     /// and start at 1. 0 is reserved for NULL.
     54     typedef uint32_t IdentifierID;
     55 
     56     /// \brief An ID number that refers to a declaration in an AST file.
     57     ///
     58     /// The ID numbers of declarations are consecutive (in order of
     59     /// discovery), with values below NUM_PREDEF_DECL_IDS being reserved.
     60     /// At the start of a chain of precompiled headers, declaration ID 1 is
     61     /// used for the translation unit declaration.
     62     typedef uint32_t DeclID;
     63 
     64     /// \brief a Decl::Kind/DeclID pair.
     65     typedef std::pair<uint32_t, DeclID> KindDeclIDPair;
     66 
     67     // FIXME: Turn these into classes so we can have some type safety when
     68     // we go from local ID to global and vice-versa.
     69     typedef DeclID LocalDeclID;
     70     typedef DeclID GlobalDeclID;
     71 
     72     /// \brief An ID number that refers to a type in an AST file.
     73     ///
     74     /// The ID of a type is partitioned into two parts: the lower
     75     /// three bits are used to store the const/volatile/restrict
     76     /// qualifiers (as with QualType) and the upper bits provide a
     77     /// type index. The type index values are partitioned into two
     78     /// sets. The values below NUM_PREDEF_TYPE_IDs are predefined type
     79     /// IDs (based on the PREDEF_TYPE_*_ID constants), with 0 as a
     80     /// placeholder for "no type". Values from NUM_PREDEF_TYPE_IDs are
     81     /// other types that have serialized representations.
     82     typedef uint32_t TypeID;
     83 
     84     /// \brief A type index; the type ID with the qualifier bits removed.
     85     class TypeIdx {
     86       uint32_t Idx;
     87     public:
     88       TypeIdx() : Idx(0) { }
     89       explicit TypeIdx(uint32_t index) : Idx(index) { }
     90 
     91       uint32_t getIndex() const { return Idx; }
     92       TypeID asTypeID(unsigned FastQuals) const {
     93         if (Idx == uint32_t(-1))
     94           return TypeID(-1);
     95 
     96         return (Idx << Qualifiers::FastWidth) | FastQuals;
     97       }
     98       static TypeIdx fromTypeID(TypeID ID) {
     99         if (ID == TypeID(-1))
    100           return TypeIdx(-1);
    101 
    102         return TypeIdx(ID >> Qualifiers::FastWidth);
    103       }
    104     };
    105 
    106     /// A structure for putting "fast"-unqualified QualTypes into a
    107     /// DenseMap.  This uses the standard pointer hash function.
    108     struct UnsafeQualTypeDenseMapInfo {
    109       static inline bool isEqual(QualType A, QualType B) { return A == B; }
    110       static inline QualType getEmptyKey() {
    111         return QualType::getFromOpaquePtr((void*) 1);
    112       }
    113       static inline QualType getTombstoneKey() {
    114         return QualType::getFromOpaquePtr((void*) 2);
    115       }
    116       static inline unsigned getHashValue(QualType T) {
    117         assert(!T.getLocalFastQualifiers() &&
    118                "hash invalid for types with fast quals");
    119         uintptr_t v = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
    120         return (unsigned(v) >> 4) ^ (unsigned(v) >> 9);
    121       }
    122     };
    123 
    124     /// \brief An ID number that refers to an identifier in an AST file.
    125     typedef uint32_t IdentID;
    126 
    127     /// \brief The number of predefined identifier IDs.
    128     const unsigned int NUM_PREDEF_IDENT_IDS = 1;
    129 
    130     /// \brief An ID number that refers to an ObjC selector in an AST file.
    131     typedef uint32_t SelectorID;
    132 
    133     /// \brief The number of predefined selector IDs.
    134     const unsigned int NUM_PREDEF_SELECTOR_IDS = 1;
    135 
    136     /// \brief An ID number that refers to a set of CXXBaseSpecifiers in an
    137     /// AST file.
    138     typedef uint32_t CXXBaseSpecifiersID;
    139 
    140     /// \brief An ID number that refers to an entity in the detailed
    141     /// preprocessing record.
    142     typedef uint32_t PreprocessedEntityID;
    143 
    144     /// \brief An ID number that refers to a submodule in a module file.
    145     typedef uint32_t SubmoduleID;
    146 
    147     /// \brief The number of predefined submodule IDs.
    148     const unsigned int NUM_PREDEF_SUBMODULE_IDS = 1;
    149 
    150     /// \brief Source range/offset of a preprocessed entity.
    151     struct PPEntityOffset {
    152       /// \brief Raw source location of beginning of range.
    153       unsigned Begin;
    154       /// \brief Raw source location of end of range.
    155       unsigned End;
    156       /// \brief Offset in the AST file.
    157       uint32_t BitOffset;
    158 
    159       PPEntityOffset(SourceRange R, uint32_t BitOffset)
    160         : Begin(R.getBegin().getRawEncoding()),
    161           End(R.getEnd().getRawEncoding()),
    162           BitOffset(BitOffset) { }
    163     };
    164 
    165     /// \brief Source range/offset of a preprocessed entity.
    166     struct DeclOffset {
    167       /// \brief Raw source location.
    168       unsigned Loc;
    169       /// \brief Offset in the AST file.
    170       uint32_t BitOffset;
    171 
    172       DeclOffset() : Loc(0), BitOffset(0) { }
    173       DeclOffset(SourceLocation Loc, uint32_t BitOffset)
    174         : Loc(Loc.getRawEncoding()),
    175           BitOffset(BitOffset) { }
    176       void setLocation(SourceLocation L) {
    177         Loc = L.getRawEncoding();
    178       }
    179     };
    180 
    181     /// \brief The number of predefined preprocessed entity IDs.
    182     const unsigned int NUM_PREDEF_PP_ENTITY_IDS = 1;
    183 
    184     /// \brief Describes the various kinds of blocks that occur within
    185     /// an AST file.
    186     enum BlockIDs {
    187       /// \brief The AST block, which acts as a container around the
    188       /// full AST block.
    189       AST_BLOCK_ID = llvm::bitc::FIRST_APPLICATION_BLOCKID,
    190 
    191       /// \brief The block containing information about the source
    192       /// manager.
    193       SOURCE_MANAGER_BLOCK_ID,
    194 
    195       /// \brief The block containing information about the
    196       /// preprocessor.
    197       PREPROCESSOR_BLOCK_ID,
    198 
    199       /// \brief The block containing the definitions of all of the
    200       /// types and decls used within the AST file.
    201       DECLTYPES_BLOCK_ID,
    202 
    203       /// \brief The block containing DECL_UPDATES records.
    204       DECL_UPDATES_BLOCK_ID,
    205 
    206       /// \brief The block containing the detailed preprocessing record.
    207       PREPROCESSOR_DETAIL_BLOCK_ID,
    208 
    209       /// \brief The block containing the submodule structure.
    210       SUBMODULE_BLOCK_ID
    211     };
    212 
    213     /// \brief Record types that occur within the AST block itself.
    214     enum ASTRecordTypes {
    215       /// \brief Record code for the offsets of each type.
    216       ///
    217       /// The TYPE_OFFSET constant describes the record that occurs
    218       /// within the AST block. The record itself is an array of offsets that
    219       /// point into the declarations and types block (identified by
    220       /// DECLTYPES_BLOCK_ID). The index into the array is based on the ID
    221       /// of a type. For a given type ID @c T, the lower three bits of
    222       /// @c T are its qualifiers (const, volatile, restrict), as in
    223       /// the QualType class. The upper bits, after being shifted and
    224       /// subtracting NUM_PREDEF_TYPE_IDS, are used to index into the
    225       /// TYPE_OFFSET block to determine the offset of that type's
    226       /// corresponding record within the DECLTYPES_BLOCK_ID block.
    227       TYPE_OFFSET = 1,
    228 
    229       /// \brief Record code for the offsets of each decl.
    230       ///
    231       /// The DECL_OFFSET constant describes the record that occurs
    232       /// within the block identified by DECL_OFFSETS_BLOCK_ID within
    233       /// the AST block. The record itself is an array of offsets that
    234       /// point into the declarations and types block (identified by
    235       /// DECLTYPES_BLOCK_ID). The declaration ID is an index into this
    236       /// record, after subtracting one to account for the use of
    237       /// declaration ID 0 for a NULL declaration pointer. Index 0 is
    238       /// reserved for the translation unit declaration.
    239       DECL_OFFSET = 2,
    240 
    241       /// \brief Record code for the language options table.
    242       ///
    243       /// The record with this code contains the contents of the
    244       /// LangOptions structure. We serialize the entire contents of
    245       /// the structure, and let the reader decide which options are
    246       /// actually important to check.
    247       LANGUAGE_OPTIONS = 3,
    248 
    249       /// \brief AST file metadata, including the AST file version number
    250       /// and the target triple used to build the AST file.
    251       METADATA = 4,
    252 
    253       /// \brief Record code for the table of offsets of each
    254       /// identifier ID.
    255       ///
    256       /// The offset table contains offsets into the blob stored in
    257       /// the IDENTIFIER_TABLE record. Each offset points to the
    258       /// NULL-terminated string that corresponds to that identifier.
    259       IDENTIFIER_OFFSET = 5,
    260 
    261       /// \brief Record code for the identifier table.
    262       ///
    263       /// The identifier table is a simple blob that contains
    264       /// NULL-terminated strings for all of the identifiers
    265       /// referenced by the AST file. The IDENTIFIER_OFFSET table
    266       /// contains the mapping from identifier IDs to the characters
    267       /// in this blob. Note that the starting offsets of all of the
    268       /// identifiers are odd, so that, when the identifier offset
    269       /// table is loaded in, we can use the low bit to distinguish
    270       /// between offsets (for unresolved identifier IDs) and
    271       /// IdentifierInfo pointers (for already-resolved identifier
    272       /// IDs).
    273       IDENTIFIER_TABLE = 6,
    274 
    275       /// \brief Record code for the array of external definitions.
    276       ///
    277       /// The AST file contains a list of all of the unnamed external
    278       /// definitions present within the parsed headers, stored as an
    279       /// array of declaration IDs. These external definitions will be
    280       /// reported to the AST consumer after the AST file has been
    281       /// read, since their presence can affect the semantics of the
    282       /// program (e.g., for code generation).
    283       EXTERNAL_DEFINITIONS = 7,
    284 
    285       /// \brief Record code for the set of non-builtin, special
    286       /// types.
    287       ///
    288       /// This record contains the type IDs for the various type nodes
    289       /// that are constructed during semantic analysis (e.g.,
    290       /// __builtin_va_list). The SPECIAL_TYPE_* constants provide
    291       /// offsets into this record.
    292       SPECIAL_TYPES = 8,
    293 
    294       /// \brief Record code for the extra statistics we gather while
    295       /// generating an AST file.
    296       STATISTICS = 9,
    297 
    298       /// \brief Record code for the array of tentative definitions.
    299       TENTATIVE_DEFINITIONS = 10,
    300 
    301       /// \brief Record code for the array of locally-scoped external
    302       /// declarations.
    303       LOCALLY_SCOPED_EXTERNAL_DECLS = 11,
    304 
    305       /// \brief Record code for the table of offsets into the
    306       /// Objective-C method pool.
    307       SELECTOR_OFFSETS = 12,
    308 
    309       /// \brief Record code for the Objective-C method pool,
    310       METHOD_POOL = 13,
    311 
    312       /// \brief The value of the next __COUNTER__ to dispense.
    313       /// [PP_COUNTER_VALUE, Val]
    314       PP_COUNTER_VALUE = 14,
    315 
    316       /// \brief Record code for the table of offsets into the block
    317       /// of source-location information.
    318       SOURCE_LOCATION_OFFSETS = 15,
    319 
    320       /// \brief Record code for the set of source location entries
    321       /// that need to be preloaded by the AST reader.
    322       ///
    323       /// This set contains the source location entry for the
    324       /// predefines buffer and for any file entries that need to be
    325       /// preloaded.
    326       SOURCE_LOCATION_PRELOADS = 16,
    327 
    328       /// \brief Record code for the stat() cache.
    329       STAT_CACHE = 17,
    330 
    331       /// \brief Record code for the set of ext_vector type names.
    332       EXT_VECTOR_DECLS = 18,
    333 
    334       /// \brief Record code for the original file that was used to
    335       /// generate the AST file.
    336       ORIGINAL_FILE_NAME = 19,
    337 
    338       /// \brief Record code for the file ID of the original file used to
    339       /// generate the AST file.
    340       ORIGINAL_FILE_ID = 20,
    341 
    342       /// \brief Record code for the version control branch and revision
    343       /// information of the compiler used to build this AST file.
    344       VERSION_CONTROL_BRANCH_REVISION = 21,
    345 
    346       /// \brief Record code for the array of unused file scoped decls.
    347       UNUSED_FILESCOPED_DECLS = 22,
    348 
    349       /// \brief Record code for the table of offsets to entries in the
    350       /// preprocessing record.
    351       PPD_ENTITIES_OFFSETS = 23,
    352 
    353       /// \brief Record code for the array of VTable uses.
    354       VTABLE_USES = 24,
    355 
    356       /// \brief Record code for the array of dynamic classes.
    357       DYNAMIC_CLASSES = 25,
    358 
    359       /// \brief Record code for the list of other AST files imported by
    360       /// this AST file.
    361       IMPORTS = 26,
    362 
    363       /// \brief Record code for referenced selector pool.
    364       REFERENCED_SELECTOR_POOL = 27,
    365 
    366       /// \brief Record code for an update to the TU's lexically contained
    367       /// declarations.
    368       TU_UPDATE_LEXICAL = 28,
    369 
    370       /// \brief Record code for the array describing the locations (in the
    371       /// LOCAL_REDECLARATIONS record) of the redeclaration chains, indexed by
    372       /// the first known ID.
    373       LOCAL_REDECLARATIONS_MAP = 29,
    374 
    375       /// \brief Record code for declarations that Sema keeps references of.
    376       SEMA_DECL_REFS = 30,
    377 
    378       /// \brief Record code for weak undeclared identifiers.
    379       WEAK_UNDECLARED_IDENTIFIERS = 31,
    380 
    381       /// \brief Record code for pending implicit instantiations.
    382       PENDING_IMPLICIT_INSTANTIATIONS = 32,
    383 
    384       /// \brief Record code for a decl replacement block.
    385       ///
    386       /// If a declaration is modified after having been deserialized, and then
    387       /// written to a dependent AST file, its ID and offset must be added to
    388       /// the replacement block.
    389       DECL_REPLACEMENTS = 33,
    390 
    391       /// \brief Record code for an update to a decl context's lookup table.
    392       ///
    393       /// In practice, this should only be used for the TU and namespaces.
    394       UPDATE_VISIBLE = 34,
    395 
    396       /// \brief Record for offsets of DECL_UPDATES records for declarations
    397       /// that were modified after being deserialized and need updates.
    398       DECL_UPDATE_OFFSETS = 35,
    399 
    400       /// \brief Record of updates for a declaration that was modified after
    401       /// being deserialized.
    402       DECL_UPDATES = 36,
    403 
    404       /// \brief Record code for the table of offsets to CXXBaseSpecifier
    405       /// sets.
    406       CXX_BASE_SPECIFIER_OFFSETS = 37,
    407 
    408       /// \brief Record code for #pragma diagnostic mappings.
    409       DIAG_PRAGMA_MAPPINGS = 38,
    410 
    411       /// \brief Record code for special CUDA declarations.
    412       CUDA_SPECIAL_DECL_REFS = 39,
    413 
    414       /// \brief Record code for header search information.
    415       HEADER_SEARCH_TABLE = 40,
    416 
    417       /// \brief The directory that the PCH was originally created in.
    418       ORIGINAL_PCH_DIR = 41,
    419 
    420       /// \brief Record code for floating point #pragma options.
    421       FP_PRAGMA_OPTIONS = 42,
    422 
    423       /// \brief Record code for enabled OpenCL extensions.
    424       OPENCL_EXTENSIONS = 43,
    425 
    426       /// \brief The list of delegating constructor declarations.
    427       DELEGATING_CTORS = 44,
    428 
    429       /// \brief Record code for the table of offsets into the block
    430       /// of file source-location information.
    431       FILE_SOURCE_LOCATION_OFFSETS = 45,
    432 
    433       /// \brief Record code for the set of known namespaces, which are used
    434       /// for typo correction.
    435       KNOWN_NAMESPACES = 46,
    436 
    437       /// \brief Record code for the remapping information used to relate
    438       /// loaded modules to the various offsets and IDs(e.g., source location
    439       /// offests, declaration and type IDs) that are used in that module to
    440       /// refer to other modules.
    441       MODULE_OFFSET_MAP = 47,
    442 
    443       /// \brief Record code for the source manager line table information,
    444       /// which stores information about #line directives.
    445       SOURCE_MANAGER_LINE_TABLE = 48,
    446 
    447       /// \brief Record code for map of Objective-C class definition IDs to the
    448       /// ObjC categories in a module that are attached to that class.
    449       OBJC_CATEGORIES_MAP = 49,
    450 
    451       /// \brief Record code for a file sorted array of DeclIDs in a module.
    452       FILE_SORTED_DECLS = 50,
    453 
    454       /// \brief Record code for an array of all of the (sub)modules that were
    455       /// imported by the AST file.
    456       IMPORTED_MODULES = 51,
    457 
    458       /// \brief Record code for the set of merged declarations in an AST file.
    459       MERGED_DECLARATIONS = 52,
    460 
    461       /// \brief Record code for the array of redeclaration chains.
    462       ///
    463       /// This array can only be interpreted properly using the local
    464       /// redeclarations map.
    465       LOCAL_REDECLARATIONS = 53,
    466 
    467       /// \brief Record code for the array of Objective-C categories (including
    468       /// extensions).
    469       ///
    470       /// This array can only be interpreted properly using the Objective-C
    471       /// categories map.
    472       OBJC_CATEGORIES
    473     };
    474 
    475     /// \brief Record types used within a source manager block.
    476     enum SourceManagerRecordTypes {
    477       /// \brief Describes a source location entry (SLocEntry) for a
    478       /// file.
    479       SM_SLOC_FILE_ENTRY = 1,
    480       /// \brief Describes a source location entry (SLocEntry) for a
    481       /// buffer.
    482       SM_SLOC_BUFFER_ENTRY = 2,
    483       /// \brief Describes a blob that contains the data for a buffer
    484       /// entry. This kind of record always directly follows a
    485       /// SM_SLOC_BUFFER_ENTRY record or a SM_SLOC_FILE_ENTRY with an
    486       /// overridden buffer.
    487       SM_SLOC_BUFFER_BLOB = 3,
    488       /// \brief Describes a source location entry (SLocEntry) for a
    489       /// macro expansion.
    490       SM_SLOC_EXPANSION_ENTRY = 4
    491     };
    492 
    493     /// \brief Record types used within a preprocessor block.
    494     enum PreprocessorRecordTypes {
    495       // The macros in the PP section are a PP_MACRO_* instance followed by a
    496       // list of PP_TOKEN instances for each token in the definition.
    497 
    498       /// \brief An object-like macro definition.
    499       /// [PP_MACRO_OBJECT_LIKE, IdentInfoID, SLoc, IsUsed]
    500       PP_MACRO_OBJECT_LIKE = 1,
    501 
    502       /// \brief A function-like macro definition.
    503       /// [PP_MACRO_FUNCTION_LIKE, <ObjectLikeStuff>, IsC99Varargs, IsGNUVarars,
    504       ///  NumArgs, ArgIdentInfoID* ]
    505       PP_MACRO_FUNCTION_LIKE = 2,
    506 
    507       /// \brief Describes one token.
    508       /// [PP_TOKEN, SLoc, Length, IdentInfoID, Kind, Flags]
    509       PP_TOKEN = 3
    510     };
    511 
    512     /// \brief Record types used within a preprocessor detail block.
    513     enum PreprocessorDetailRecordTypes {
    514       /// \brief Describes a macro expansion within the preprocessing record.
    515       PPD_MACRO_EXPANSION = 0,
    516 
    517       /// \brief Describes a macro definition within the preprocessing record.
    518       PPD_MACRO_DEFINITION = 1,
    519 
    520       /// \brief Describes an inclusion directive within the preprocessing
    521       /// record.
    522       PPD_INCLUSION_DIRECTIVE = 2
    523     };
    524 
    525     /// \brief Record types used within a submodule description block.
    526     enum SubmoduleRecordTypes {
    527       /// \brief Metadata for submodules as a whole.
    528       SUBMODULE_METADATA = 0,
    529       /// \brief Defines the major attributes of a submodule, including its
    530       /// name and parent.
    531       SUBMODULE_DEFINITION = 1,
    532       /// \brief Specifies the umbrella header used to create this module,
    533       /// if any.
    534       SUBMODULE_UMBRELLA_HEADER = 2,
    535       /// \brief Specifies a header that falls into this (sub)module.
    536       SUBMODULE_HEADER = 3,
    537       /// \brief Specifies an umbrella directory.
    538       SUBMODULE_UMBRELLA_DIR = 4,
    539       /// \brief Specifies the submodules that are imported by this
    540       /// submodule.
    541       SUBMODULE_IMPORTS = 5,
    542       /// \brief Specifies the submodules that are re-exported from this
    543       /// submodule.
    544       SUBMODULE_EXPORTS = 6,
    545       /// \brief Specifies a required feature.
    546       SUBMODULE_REQUIRES = 7
    547     };
    548 
    549     /// \defgroup ASTAST AST file AST constants
    550     ///
    551     /// The constants in this group describe various components of the
    552     /// abstract syntax tree within an AST file.
    553     ///
    554     /// @{
    555 
    556     /// \brief Predefined type IDs.
    557     ///
    558     /// These type IDs correspond to predefined types in the AST
    559     /// context, such as built-in types (int) and special place-holder
    560     /// types (the <overload> and <dependent> type markers). Such
    561     /// types are never actually serialized, since they will be built
    562     /// by the AST context when it is created.
    563     enum PredefinedTypeIDs {
    564       /// \brief The NULL type.
    565       PREDEF_TYPE_NULL_ID       = 0,
    566       /// \brief The void type.
    567       PREDEF_TYPE_VOID_ID       = 1,
    568       /// \brief The 'bool' or '_Bool' type.
    569       PREDEF_TYPE_BOOL_ID       = 2,
    570       /// \brief The 'char' type, when it is unsigned.
    571       PREDEF_TYPE_CHAR_U_ID     = 3,
    572       /// \brief The 'unsigned char' type.
    573       PREDEF_TYPE_UCHAR_ID      = 4,
    574       /// \brief The 'unsigned short' type.
    575       PREDEF_TYPE_USHORT_ID     = 5,
    576       /// \brief The 'unsigned int' type.
    577       PREDEF_TYPE_UINT_ID       = 6,
    578       /// \brief The 'unsigned long' type.
    579       PREDEF_TYPE_ULONG_ID      = 7,
    580       /// \brief The 'unsigned long long' type.
    581       PREDEF_TYPE_ULONGLONG_ID  = 8,
    582       /// \brief The 'char' type, when it is signed.
    583       PREDEF_TYPE_CHAR_S_ID     = 9,
    584       /// \brief The 'signed char' type.
    585       PREDEF_TYPE_SCHAR_ID      = 10,
    586       /// \brief The C++ 'wchar_t' type.
    587       PREDEF_TYPE_WCHAR_ID      = 11,
    588       /// \brief The (signed) 'short' type.
    589       PREDEF_TYPE_SHORT_ID      = 12,
    590       /// \brief The (signed) 'int' type.
    591       PREDEF_TYPE_INT_ID        = 13,
    592       /// \brief The (signed) 'long' type.
    593       PREDEF_TYPE_LONG_ID       = 14,
    594       /// \brief The (signed) 'long long' type.
    595       PREDEF_TYPE_LONGLONG_ID   = 15,
    596       /// \brief The 'float' type.
    597       PREDEF_TYPE_FLOAT_ID      = 16,
    598       /// \brief The 'double' type.
    599       PREDEF_TYPE_DOUBLE_ID     = 17,
    600       /// \brief The 'long double' type.
    601       PREDEF_TYPE_LONGDOUBLE_ID = 18,
    602       /// \brief The placeholder type for overloaded function sets.
    603       PREDEF_TYPE_OVERLOAD_ID   = 19,
    604       /// \brief The placeholder type for dependent types.
    605       PREDEF_TYPE_DEPENDENT_ID  = 20,
    606       /// \brief The '__uint128_t' type.
    607       PREDEF_TYPE_UINT128_ID    = 21,
    608       /// \brief The '__int128_t' type.
    609       PREDEF_TYPE_INT128_ID     = 22,
    610       /// \brief The type of 'nullptr'.
    611       PREDEF_TYPE_NULLPTR_ID    = 23,
    612       /// \brief The C++ 'char16_t' type.
    613       PREDEF_TYPE_CHAR16_ID     = 24,
    614       /// \brief The C++ 'char32_t' type.
    615       PREDEF_TYPE_CHAR32_ID     = 25,
    616       /// \brief The ObjC 'id' type.
    617       PREDEF_TYPE_OBJC_ID       = 26,
    618       /// \brief The ObjC 'Class' type.
    619       PREDEF_TYPE_OBJC_CLASS    = 27,
    620       /// \brief The ObjC 'SEL' type.
    621       PREDEF_TYPE_OBJC_SEL      = 28,
    622       /// \brief The 'unknown any' placeholder type.
    623       PREDEF_TYPE_UNKNOWN_ANY   = 29,
    624       /// \brief The placeholder type for bound member functions.
    625       PREDEF_TYPE_BOUND_MEMBER  = 30,
    626       /// \brief The "auto" deduction type.
    627       PREDEF_TYPE_AUTO_DEDUCT   = 31,
    628       /// \brief The "auto &&" deduction type.
    629       PREDEF_TYPE_AUTO_RREF_DEDUCT = 32,
    630       /// \brief The OpenCL 'half' / ARM NEON __fp16 type.
    631       PREDEF_TYPE_HALF_ID       = 33,
    632       /// \brief ARC's unbridged-cast placeholder type.
    633       PREDEF_TYPE_ARC_UNBRIDGED_CAST = 34,
    634       /// \brief The pseudo-object placeholder type.
    635       PREDEF_TYPE_PSEUDO_OBJECT = 35
    636     };
    637 
    638     /// \brief The number of predefined type IDs that are reserved for
    639     /// the PREDEF_TYPE_* constants.
    640     ///
    641     /// Type IDs for non-predefined types will start at
    642     /// NUM_PREDEF_TYPE_IDs.
    643     const unsigned NUM_PREDEF_TYPE_IDS = 100;
    644 
    645     /// \brief The number of allowed abbreviations in bits
    646     const unsigned NUM_ALLOWED_ABBREVS_SIZE = 4;
    647 
    648     /// \brief Record codes for each kind of type.
    649     ///
    650     /// These constants describe the type records that can occur within a
    651     /// block identified by DECLTYPES_BLOCK_ID in the AST file. Each
    652     /// constant describes a record for a specific type class in the
    653     /// AST.
    654     enum TypeCode {
    655       /// \brief An ExtQualType record.
    656       TYPE_EXT_QUAL                 = 1,
    657       /// \brief A ComplexType record.
    658       TYPE_COMPLEX                  = 3,
    659       /// \brief A PointerType record.
    660       TYPE_POINTER                  = 4,
    661       /// \brief A BlockPointerType record.
    662       TYPE_BLOCK_POINTER            = 5,
    663       /// \brief An LValueReferenceType record.
    664       TYPE_LVALUE_REFERENCE         = 6,
    665       /// \brief An RValueReferenceType record.
    666       TYPE_RVALUE_REFERENCE         = 7,
    667       /// \brief A MemberPointerType record.
    668       TYPE_MEMBER_POINTER           = 8,
    669       /// \brief A ConstantArrayType record.
    670       TYPE_CONSTANT_ARRAY           = 9,
    671       /// \brief An IncompleteArrayType record.
    672       TYPE_INCOMPLETE_ARRAY         = 10,
    673       /// \brief A VariableArrayType record.
    674       TYPE_VARIABLE_ARRAY           = 11,
    675       /// \brief A VectorType record.
    676       TYPE_VECTOR                   = 12,
    677       /// \brief An ExtVectorType record.
    678       TYPE_EXT_VECTOR               = 13,
    679       /// \brief A FunctionNoProtoType record.
    680       TYPE_FUNCTION_NO_PROTO        = 14,
    681       /// \brief A FunctionProtoType record.
    682       TYPE_FUNCTION_PROTO           = 15,
    683       /// \brief A TypedefType record.
    684       TYPE_TYPEDEF                  = 16,
    685       /// \brief A TypeOfExprType record.
    686       TYPE_TYPEOF_EXPR              = 17,
    687       /// \brief A TypeOfType record.
    688       TYPE_TYPEOF                   = 18,
    689       /// \brief A RecordType record.
    690       TYPE_RECORD                   = 19,
    691       /// \brief An EnumType record.
    692       TYPE_ENUM                     = 20,
    693       /// \brief An ObjCInterfaceType record.
    694       TYPE_OBJC_INTERFACE           = 21,
    695       /// \brief An ObjCObjectPointerType record.
    696       TYPE_OBJC_OBJECT_POINTER      = 22,
    697       /// \brief a DecltypeType record.
    698       TYPE_DECLTYPE                 = 23,
    699       /// \brief An ElaboratedType record.
    700       TYPE_ELABORATED               = 24,
    701       /// \brief A SubstTemplateTypeParmType record.
    702       TYPE_SUBST_TEMPLATE_TYPE_PARM = 25,
    703       /// \brief An UnresolvedUsingType record.
    704       TYPE_UNRESOLVED_USING         = 26,
    705       /// \brief An InjectedClassNameType record.
    706       TYPE_INJECTED_CLASS_NAME      = 27,
    707       /// \brief An ObjCObjectType record.
    708       TYPE_OBJC_OBJECT              = 28,
    709       /// \brief An TemplateTypeParmType record.
    710       TYPE_TEMPLATE_TYPE_PARM       = 29,
    711       /// \brief An TemplateSpecializationType record.
    712       TYPE_TEMPLATE_SPECIALIZATION  = 30,
    713       /// \brief A DependentNameType record.
    714       TYPE_DEPENDENT_NAME           = 31,
    715       /// \brief A DependentTemplateSpecializationType record.
    716       TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION = 32,
    717       /// \brief A DependentSizedArrayType record.
    718       TYPE_DEPENDENT_SIZED_ARRAY    = 33,
    719       /// \brief A ParenType record.
    720       TYPE_PAREN                    = 34,
    721       /// \brief A PackExpansionType record.
    722       TYPE_PACK_EXPANSION           = 35,
    723       /// \brief An AttributedType record.
    724       TYPE_ATTRIBUTED               = 36,
    725       /// \brief A SubstTemplateTypeParmPackType record.
    726       TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK = 37,
    727       /// \brief A AutoType record.
    728       TYPE_AUTO                  = 38,
    729       /// \brief A UnaryTransformType record.
    730       TYPE_UNARY_TRANSFORM       = 39,
    731       /// \brief An AtomicType record.
    732       TYPE_ATOMIC                = 40
    733     };
    734 
    735     /// \brief The type IDs for special types constructed by semantic
    736     /// analysis.
    737     ///
    738     /// The constants in this enumeration are indices into the
    739     /// SPECIAL_TYPES record.
    740     enum SpecialTypeIDs {
    741       /// \brief __builtin_va_list
    742       SPECIAL_TYPE_BUILTIN_VA_LIST             = 0,
    743       /// \brief CFConstantString type
    744       SPECIAL_TYPE_CF_CONSTANT_STRING          = 1,
    745       /// \brief C FILE typedef type
    746       SPECIAL_TYPE_FILE                        = 2,
    747       /// \brief C jmp_buf typedef type
    748       SPECIAL_TYPE_JMP_BUF                     = 3,
    749       /// \brief C sigjmp_buf typedef type
    750       SPECIAL_TYPE_SIGJMP_BUF                  = 4,
    751       /// \brief Objective-C "id" redefinition type
    752       SPECIAL_TYPE_OBJC_ID_REDEFINITION        = 5,
    753       /// \brief Objective-C "Class" redefinition type
    754       SPECIAL_TYPE_OBJC_CLASS_REDEFINITION     = 6,
    755       /// \brief Objective-C "SEL" redefinition type
    756       SPECIAL_TYPE_OBJC_SEL_REDEFINITION       = 7,
    757       /// \brief C ucontext_t typedef type
    758       SPECIAL_TYPE_UCONTEXT_T                  = 8
    759     };
    760 
    761     /// \brief The number of special type IDs.
    762     const unsigned NumSpecialTypeIDs = 9;
    763 
    764     /// \brief Predefined declaration IDs.
    765     ///
    766     /// These declaration IDs correspond to predefined declarations in the AST
    767     /// context, such as the NULL declaration ID. Such declarations are never
    768     /// actually serialized, since they will be built by the AST context when
    769     /// it is created.
    770     enum PredefinedDeclIDs {
    771       /// \brief The NULL declaration.
    772       PREDEF_DECL_NULL_ID       = 0,
    773 
    774       /// \brief The translation unit.
    775       PREDEF_DECL_TRANSLATION_UNIT_ID = 1,
    776 
    777       /// \brief The Objective-C 'id' type.
    778       PREDEF_DECL_OBJC_ID_ID = 2,
    779 
    780       /// \brief The Objective-C 'SEL' type.
    781       PREDEF_DECL_OBJC_SEL_ID = 3,
    782 
    783       /// \brief The Objective-C 'Class' type.
    784       PREDEF_DECL_OBJC_CLASS_ID = 4,
    785 
    786       /// \brief The Objective-C 'Protocol' type.
    787       PREDEF_DECL_OBJC_PROTOCOL_ID = 5,
    788 
    789       /// \brief The signed 128-bit integer type.
    790       PREDEF_DECL_INT_128_ID = 6,
    791 
    792       /// \brief The unsigned 128-bit integer type.
    793       PREDEF_DECL_UNSIGNED_INT_128_ID = 7,
    794 
    795       /// \brief The internal 'instancetype' typedef.
    796       PREDEF_DECL_OBJC_INSTANCETYPE_ID = 8
    797     };
    798 
    799     /// \brief The number of declaration IDs that are predefined.
    800     ///
    801     /// For more information about predefined declarations, see the
    802     /// \c PredefinedDeclIDs type and the PREDEF_DECL_*_ID constants.
    803     const unsigned int NUM_PREDEF_DECL_IDS = 9;
    804 
    805     /// \brief Record codes for each kind of declaration.
    806     ///
    807     /// These constants describe the declaration records that can occur within
    808     /// a declarations block (identified by DECLS_BLOCK_ID). Each
    809     /// constant describes a record for a specific declaration class
    810     /// in the AST.
    811     enum DeclCode {
    812       /// \brief A TypedefDecl record.
    813       DECL_TYPEDEF = 51,
    814       /// \brief A TypeAliasDecl record.
    815       DECL_TYPEALIAS,
    816       /// \brief An EnumDecl record.
    817       DECL_ENUM,
    818       /// \brief A RecordDecl record.
    819       DECL_RECORD,
    820       /// \brief An EnumConstantDecl record.
    821       DECL_ENUM_CONSTANT,
    822       /// \brief A FunctionDecl record.
    823       DECL_FUNCTION,
    824       /// \brief A ObjCMethodDecl record.
    825       DECL_OBJC_METHOD,
    826       /// \brief A ObjCInterfaceDecl record.
    827       DECL_OBJC_INTERFACE,
    828       /// \brief A ObjCProtocolDecl record.
    829       DECL_OBJC_PROTOCOL,
    830       /// \brief A ObjCIvarDecl record.
    831       DECL_OBJC_IVAR,
    832       /// \brief A ObjCAtDefsFieldDecl record.
    833       DECL_OBJC_AT_DEFS_FIELD,
    834       /// \brief A ObjCCategoryDecl record.
    835       DECL_OBJC_CATEGORY,
    836       /// \brief A ObjCCategoryImplDecl record.
    837       DECL_OBJC_CATEGORY_IMPL,
    838       /// \brief A ObjCImplementationDecl record.
    839       DECL_OBJC_IMPLEMENTATION,
    840       /// \brief A ObjCCompatibleAliasDecl record.
    841       DECL_OBJC_COMPATIBLE_ALIAS,
    842       /// \brief A ObjCPropertyDecl record.
    843       DECL_OBJC_PROPERTY,
    844       /// \brief A ObjCPropertyImplDecl record.
    845       DECL_OBJC_PROPERTY_IMPL,
    846       /// \brief A FieldDecl record.
    847       DECL_FIELD,
    848       /// \brief A VarDecl record.
    849       DECL_VAR,
    850       /// \brief An ImplicitParamDecl record.
    851       DECL_IMPLICIT_PARAM,
    852       /// \brief A ParmVarDecl record.
    853       DECL_PARM_VAR,
    854       /// \brief A FileScopeAsmDecl record.
    855       DECL_FILE_SCOPE_ASM,
    856       /// \brief A BlockDecl record.
    857       DECL_BLOCK,
    858       /// \brief A record that stores the set of declarations that are
    859       /// lexically stored within a given DeclContext.
    860       ///
    861       /// The record itself is a blob that is an array of declaration IDs,
    862       /// in the order in which those declarations were added to the
    863       /// declaration context. This data is used when iterating over
    864       /// the contents of a DeclContext, e.g., via
    865       /// DeclContext::decls_begin()/DeclContext::decls_end().
    866       DECL_CONTEXT_LEXICAL,
    867       /// \brief A record that stores the set of declarations that are
    868       /// visible from a given DeclContext.
    869       ///
    870       /// The record itself stores a set of mappings, each of which
    871       /// associates a declaration name with one or more declaration
    872       /// IDs. This data is used when performing qualified name lookup
    873       /// into a DeclContext via DeclContext::lookup.
    874       DECL_CONTEXT_VISIBLE,
    875       /// \brief A LabelDecl record.
    876       DECL_LABEL,
    877       /// \brief A NamespaceDecl record.
    878       DECL_NAMESPACE,
    879       /// \brief A NamespaceAliasDecl record.
    880       DECL_NAMESPACE_ALIAS,
    881       /// \brief A UsingDecl record.
    882       DECL_USING,
    883       /// \brief A UsingShadowDecl record.
    884       DECL_USING_SHADOW,
    885       /// \brief A UsingDirecitveDecl record.
    886       DECL_USING_DIRECTIVE,
    887       /// \brief An UnresolvedUsingValueDecl record.
    888       DECL_UNRESOLVED_USING_VALUE,
    889       /// \brief An UnresolvedUsingTypenameDecl record.
    890       DECL_UNRESOLVED_USING_TYPENAME,
    891       /// \brief A LinkageSpecDecl record.
    892       DECL_LINKAGE_SPEC,
    893       /// \brief A CXXRecordDecl record.
    894       DECL_CXX_RECORD,
    895       /// \brief A CXXMethodDecl record.
    896       DECL_CXX_METHOD,
    897       /// \brief A CXXConstructorDecl record.
    898       DECL_CXX_CONSTRUCTOR,
    899       /// \brief A CXXDestructorDecl record.
    900       DECL_CXX_DESTRUCTOR,
    901       /// \brief A CXXConversionDecl record.
    902       DECL_CXX_CONVERSION,
    903       /// \brief An AccessSpecDecl record.
    904       DECL_ACCESS_SPEC,
    905 
    906       /// \brief A FriendDecl record.
    907       DECL_FRIEND,
    908       /// \brief A FriendTemplateDecl record.
    909       DECL_FRIEND_TEMPLATE,
    910       /// \brief A ClassTemplateDecl record.
    911       DECL_CLASS_TEMPLATE,
    912       /// \brief A ClassTemplateSpecializationDecl record.
    913       DECL_CLASS_TEMPLATE_SPECIALIZATION,
    914       /// \brief A ClassTemplatePartialSpecializationDecl record.
    915       DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION,
    916       /// \brief A FunctionTemplateDecl record.
    917       DECL_FUNCTION_TEMPLATE,
    918       /// \brief A TemplateTypeParmDecl record.
    919       DECL_TEMPLATE_TYPE_PARM,
    920       /// \brief A NonTypeTemplateParmDecl record.
    921       DECL_NON_TYPE_TEMPLATE_PARM,
    922       /// \brief A TemplateTemplateParmDecl record.
    923       DECL_TEMPLATE_TEMPLATE_PARM,
    924       /// \brief A TypeAliasTemplateDecl record.
    925       DECL_TYPE_ALIAS_TEMPLATE,
    926       /// \brief A StaticAssertDecl record.
    927       DECL_STATIC_ASSERT,
    928       /// \brief A record containing CXXBaseSpecifiers.
    929       DECL_CXX_BASE_SPECIFIERS,
    930       /// \brief A IndirectFieldDecl record.
    931       DECL_INDIRECTFIELD,
    932       /// \brief A NonTypeTemplateParmDecl record that stores an expanded
    933       /// non-type template parameter pack.
    934       DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK,
    935       /// \brief A ClassScopeFunctionSpecializationDecl record a class scope
    936       /// function specialization. (Microsoft extension).
    937       DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION,
    938       /// \brief An ImportDecl recording a module import.
    939       DECL_IMPORT
    940     };
    941 
    942     /// \brief Record codes for each kind of statement or expression.
    943     ///
    944     /// These constants describe the records that describe statements
    945     /// or expressions. These records  occur within type and declarations
    946     /// block, so they begin with record values of 100.  Each constant
    947     /// describes a record for a specific statement or expression class in the
    948     /// AST.
    949     enum StmtCode {
    950       /// \brief A marker record that indicates that we are at the end
    951       /// of an expression.
    952       STMT_STOP = 100,
    953       /// \brief A NULL expression.
    954       STMT_NULL_PTR,
    955       /// \brief A reference to a previously [de]serialized Stmt record.
    956       STMT_REF_PTR,
    957       /// \brief A NullStmt record.
    958       STMT_NULL,
    959       /// \brief A CompoundStmt record.
    960       STMT_COMPOUND,
    961       /// \brief A CaseStmt record.
    962       STMT_CASE,
    963       /// \brief A DefaultStmt record.
    964       STMT_DEFAULT,
    965       /// \brief A LabelStmt record.
    966       STMT_LABEL,
    967       /// \brief An AttributedStmt record.
    968       STMT_ATTRIBUTED,
    969       /// \brief An IfStmt record.
    970       STMT_IF,
    971       /// \brief A SwitchStmt record.
    972       STMT_SWITCH,
    973       /// \brief A WhileStmt record.
    974       STMT_WHILE,
    975       /// \brief A DoStmt record.
    976       STMT_DO,
    977       /// \brief A ForStmt record.
    978       STMT_FOR,
    979       /// \brief A GotoStmt record.
    980       STMT_GOTO,
    981       /// \brief An IndirectGotoStmt record.
    982       STMT_INDIRECT_GOTO,
    983       /// \brief A ContinueStmt record.
    984       STMT_CONTINUE,
    985       /// \brief A BreakStmt record.
    986       STMT_BREAK,
    987       /// \brief A ReturnStmt record.
    988       STMT_RETURN,
    989       /// \brief A DeclStmt record.
    990       STMT_DECL,
    991       /// \brief An AsmStmt record.
    992       STMT_ASM,
    993       /// \brief A PredefinedExpr record.
    994       EXPR_PREDEFINED,
    995       /// \brief A DeclRefExpr record.
    996       EXPR_DECL_REF,
    997       /// \brief An IntegerLiteral record.
    998       EXPR_INTEGER_LITERAL,
    999       /// \brief A FloatingLiteral record.
   1000       EXPR_FLOATING_LITERAL,
   1001       /// \brief An ImaginaryLiteral record.
   1002       EXPR_IMAGINARY_LITERAL,
   1003       /// \brief A StringLiteral record.
   1004       EXPR_STRING_LITERAL,
   1005       /// \brief A CharacterLiteral record.
   1006       EXPR_CHARACTER_LITERAL,
   1007       /// \brief A ParenExpr record.
   1008       EXPR_PAREN,
   1009       /// \brief A ParenListExpr record.
   1010       EXPR_PAREN_LIST,
   1011       /// \brief A UnaryOperator record.
   1012       EXPR_UNARY_OPERATOR,
   1013       /// \brief An OffsetOfExpr record.
   1014       EXPR_OFFSETOF,
   1015       /// \brief A SizefAlignOfExpr record.
   1016       EXPR_SIZEOF_ALIGN_OF,
   1017       /// \brief An ArraySubscriptExpr record.
   1018       EXPR_ARRAY_SUBSCRIPT,
   1019       /// \brief A CallExpr record.
   1020       EXPR_CALL,
   1021       /// \brief A MemberExpr record.
   1022       EXPR_MEMBER,
   1023       /// \brief A BinaryOperator record.
   1024       EXPR_BINARY_OPERATOR,
   1025       /// \brief A CompoundAssignOperator record.
   1026       EXPR_COMPOUND_ASSIGN_OPERATOR,
   1027       /// \brief A ConditionOperator record.
   1028       EXPR_CONDITIONAL_OPERATOR,
   1029       /// \brief An ImplicitCastExpr record.
   1030       EXPR_IMPLICIT_CAST,
   1031       /// \brief A CStyleCastExpr record.
   1032       EXPR_CSTYLE_CAST,
   1033       /// \brief A CompoundLiteralExpr record.
   1034       EXPR_COMPOUND_LITERAL,
   1035       /// \brief An ExtVectorElementExpr record.
   1036       EXPR_EXT_VECTOR_ELEMENT,
   1037       /// \brief An InitListExpr record.
   1038       EXPR_INIT_LIST,
   1039       /// \brief A DesignatedInitExpr record.
   1040       EXPR_DESIGNATED_INIT,
   1041       /// \brief An ImplicitValueInitExpr record.
   1042       EXPR_IMPLICIT_VALUE_INIT,
   1043       /// \brief A VAArgExpr record.
   1044       EXPR_VA_ARG,
   1045       /// \brief An AddrLabelExpr record.
   1046       EXPR_ADDR_LABEL,
   1047       /// \brief A StmtExpr record.
   1048       EXPR_STMT,
   1049       /// \brief A ChooseExpr record.
   1050       EXPR_CHOOSE,
   1051       /// \brief A GNUNullExpr record.
   1052       EXPR_GNU_NULL,
   1053       /// \brief A ShuffleVectorExpr record.
   1054       EXPR_SHUFFLE_VECTOR,
   1055       /// \brief BlockExpr
   1056       EXPR_BLOCK,
   1057       /// \brief A GenericSelectionExpr record.
   1058       EXPR_GENERIC_SELECTION,
   1059       /// \brief A PseudoObjectExpr record.
   1060       EXPR_PSEUDO_OBJECT,
   1061       /// \brief An AtomicExpr record.
   1062       EXPR_ATOMIC,
   1063 
   1064       // Objective-C
   1065 
   1066       /// \brief An ObjCStringLiteral record.
   1067       EXPR_OBJC_STRING_LITERAL,
   1068 
   1069       EXPR_OBJC_BOXED_EXPRESSION,
   1070       EXPR_OBJC_ARRAY_LITERAL,
   1071       EXPR_OBJC_DICTIONARY_LITERAL,
   1072 
   1073 
   1074       /// \brief An ObjCEncodeExpr record.
   1075       EXPR_OBJC_ENCODE,
   1076       /// \brief An ObjCSelectorExpr record.
   1077       EXPR_OBJC_SELECTOR_EXPR,
   1078       /// \brief An ObjCProtocolExpr record.
   1079       EXPR_OBJC_PROTOCOL_EXPR,
   1080       /// \brief An ObjCIvarRefExpr record.
   1081       EXPR_OBJC_IVAR_REF_EXPR,
   1082       /// \brief An ObjCPropertyRefExpr record.
   1083       EXPR_OBJC_PROPERTY_REF_EXPR,
   1084       /// \brief An ObjCSubscriptRefExpr record.
   1085       EXPR_OBJC_SUBSCRIPT_REF_EXPR,
   1086       /// \brief UNUSED
   1087       EXPR_OBJC_KVC_REF_EXPR,
   1088       /// \brief An ObjCMessageExpr record.
   1089       EXPR_OBJC_MESSAGE_EXPR,
   1090       /// \brief An ObjCIsa Expr record.
   1091       EXPR_OBJC_ISA,
   1092       /// \breif An ObjCIndirectCopyRestoreExpr record.
   1093       EXPR_OBJC_INDIRECT_COPY_RESTORE,
   1094 
   1095       /// \brief An ObjCForCollectionStmt record.
   1096       STMT_OBJC_FOR_COLLECTION,
   1097       /// \brief An ObjCAtCatchStmt record.
   1098       STMT_OBJC_CATCH,
   1099       /// \brief An ObjCAtFinallyStmt record.
   1100       STMT_OBJC_FINALLY,
   1101       /// \brief An ObjCAtTryStmt record.
   1102       STMT_OBJC_AT_TRY,
   1103       /// \brief An ObjCAtSynchronizedStmt record.
   1104       STMT_OBJC_AT_SYNCHRONIZED,
   1105       /// \brief An ObjCAtThrowStmt record.
   1106       STMT_OBJC_AT_THROW,
   1107       /// \brief An ObjCAutoreleasePoolStmt record.
   1108       STMT_OBJC_AUTORELEASE_POOL,
   1109       /// \brief A ObjCBoolLiteralExpr record.
   1110       EXPR_OBJC_BOOL_LITERAL,
   1111 
   1112       // C++
   1113 
   1114       /// \brief A CXXCatchStmt record.
   1115       STMT_CXX_CATCH,
   1116       /// \brief A CXXTryStmt record.
   1117       STMT_CXX_TRY,
   1118       /// \brief A CXXForRangeStmt record.
   1119       STMT_CXX_FOR_RANGE,
   1120 
   1121       /// \brief A CXXOperatorCallExpr record.
   1122       EXPR_CXX_OPERATOR_CALL,
   1123       /// \brief A CXXMemberCallExpr record.
   1124       EXPR_CXX_MEMBER_CALL,
   1125       /// \brief A CXXConstructExpr record.
   1126       EXPR_CXX_CONSTRUCT,
   1127       /// \brief A CXXTemporaryObjectExpr record.
   1128       EXPR_CXX_TEMPORARY_OBJECT,
   1129       /// \brief A CXXStaticCastExpr record.
   1130       EXPR_CXX_STATIC_CAST,
   1131       /// \brief A CXXDynamicCastExpr record.
   1132       EXPR_CXX_DYNAMIC_CAST,
   1133       /// \brief A CXXReinterpretCastExpr record.
   1134       EXPR_CXX_REINTERPRET_CAST,
   1135       /// \brief A CXXConstCastExpr record.
   1136       EXPR_CXX_CONST_CAST,
   1137       /// \brief A CXXFunctionalCastExpr record.
   1138       EXPR_CXX_FUNCTIONAL_CAST,
   1139       /// \brief A UserDefinedLiteral record.
   1140       EXPR_USER_DEFINED_LITERAL,
   1141       /// \brief A CXXBoolLiteralExpr record.
   1142       EXPR_CXX_BOOL_LITERAL,
   1143       EXPR_CXX_NULL_PTR_LITERAL,  // CXXNullPtrLiteralExpr
   1144       EXPR_CXX_TYPEID_EXPR,       // CXXTypeidExpr (of expr).
   1145       EXPR_CXX_TYPEID_TYPE,       // CXXTypeidExpr (of type).
   1146       EXPR_CXX_THIS,              // CXXThisExpr
   1147       EXPR_CXX_THROW,             // CXXThrowExpr
   1148       EXPR_CXX_DEFAULT_ARG,       // CXXDefaultArgExpr
   1149       EXPR_CXX_BIND_TEMPORARY,    // CXXBindTemporaryExpr
   1150 
   1151       EXPR_CXX_SCALAR_VALUE_INIT, // CXXScalarValueInitExpr
   1152       EXPR_CXX_NEW,               // CXXNewExpr
   1153       EXPR_CXX_DELETE,            // CXXDeleteExpr
   1154       EXPR_CXX_PSEUDO_DESTRUCTOR, // CXXPseudoDestructorExpr
   1155 
   1156       EXPR_EXPR_WITH_CLEANUPS,    // ExprWithCleanups
   1157 
   1158       EXPR_CXX_DEPENDENT_SCOPE_MEMBER,   // CXXDependentScopeMemberExpr
   1159       EXPR_CXX_DEPENDENT_SCOPE_DECL_REF, // DependentScopeDeclRefExpr
   1160       EXPR_CXX_UNRESOLVED_CONSTRUCT,     // CXXUnresolvedConstructExpr
   1161       EXPR_CXX_UNRESOLVED_MEMBER,        // UnresolvedMemberExpr
   1162       EXPR_CXX_UNRESOLVED_LOOKUP,        // UnresolvedLookupExpr
   1163 
   1164       EXPR_CXX_UNARY_TYPE_TRAIT,  // UnaryTypeTraitExpr
   1165       EXPR_CXX_EXPRESSION_TRAIT,  // ExpressionTraitExpr
   1166       EXPR_CXX_NOEXCEPT,          // CXXNoexceptExpr
   1167 
   1168       EXPR_OPAQUE_VALUE,          // OpaqueValueExpr
   1169       EXPR_BINARY_CONDITIONAL_OPERATOR,  // BinaryConditionalOperator
   1170       EXPR_BINARY_TYPE_TRAIT,     // BinaryTypeTraitExpr
   1171       EXPR_TYPE_TRAIT,            // TypeTraitExpr
   1172       EXPR_ARRAY_TYPE_TRAIT,      // ArrayTypeTraitIntExpr
   1173 
   1174       EXPR_PACK_EXPANSION,        // PackExpansionExpr
   1175       EXPR_SIZEOF_PACK,           // SizeOfPackExpr
   1176       EXPR_SUBST_NON_TYPE_TEMPLATE_PARM, // SubstNonTypeTemplateParmExpr
   1177       EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK,// SubstNonTypeTemplateParmPackExpr
   1178       EXPR_MATERIALIZE_TEMPORARY, // MaterializeTemporaryExpr
   1179 
   1180       // CUDA
   1181       EXPR_CUDA_KERNEL_CALL,       // CUDAKernelCallExpr
   1182 
   1183       // OpenCL
   1184       EXPR_ASTYPE,                 // AsTypeExpr
   1185 
   1186       // Microsoft
   1187       EXPR_CXX_UUIDOF_EXPR,       // CXXUuidofExpr (of expr).
   1188       EXPR_CXX_UUIDOF_TYPE,       // CXXUuidofExpr (of type).
   1189       STMT_SEH_EXCEPT,            // SEHExceptStmt
   1190       STMT_SEH_FINALLY,           // SEHFinallyStmt
   1191       STMT_SEH_TRY,               // SEHTryStmt
   1192 
   1193       // ARC
   1194       EXPR_OBJC_BRIDGED_CAST,     // ObjCBridgedCastExpr
   1195 
   1196       STMT_MS_DEPENDENT_EXISTS,   // MSDependentExistsStmt
   1197       EXPR_LAMBDA                 // LambdaExpr
   1198     };
   1199 
   1200     /// \brief The kinds of designators that can occur in a
   1201     /// DesignatedInitExpr.
   1202     enum DesignatorTypes {
   1203       /// \brief Field designator where only the field name is known.
   1204       DESIG_FIELD_NAME  = 0,
   1205       /// \brief Field designator where the field has been resolved to
   1206       /// a declaration.
   1207       DESIG_FIELD_DECL  = 1,
   1208       /// \brief Array designator.
   1209       DESIG_ARRAY       = 2,
   1210       /// \brief GNU array range designator.
   1211       DESIG_ARRAY_RANGE = 3
   1212     };
   1213 
   1214     /// \brief The different kinds of data that can occur in a
   1215     /// CtorInitializer.
   1216     enum CtorInitializerType {
   1217       CTOR_INITIALIZER_BASE,
   1218       CTOR_INITIALIZER_DELEGATING,
   1219       CTOR_INITIALIZER_MEMBER,
   1220       CTOR_INITIALIZER_INDIRECT_MEMBER
   1221     };
   1222 
   1223     /// \brief Describes the redeclarations of a declaration.
   1224     struct LocalRedeclarationsInfo {
   1225       DeclID FirstID;      // The ID of the first declaration
   1226       unsigned Offset;     // Offset into the array of redeclaration chains.
   1227 
   1228       friend bool operator<(const LocalRedeclarationsInfo &X,
   1229                             const LocalRedeclarationsInfo &Y) {
   1230         return X.FirstID < Y.FirstID;
   1231       }
   1232 
   1233       friend bool operator>(const LocalRedeclarationsInfo &X,
   1234                             const LocalRedeclarationsInfo &Y) {
   1235         return X.FirstID > Y.FirstID;
   1236       }
   1237 
   1238       friend bool operator<=(const LocalRedeclarationsInfo &X,
   1239                              const LocalRedeclarationsInfo &Y) {
   1240         return X.FirstID <= Y.FirstID;
   1241       }
   1242 
   1243       friend bool operator>=(const LocalRedeclarationsInfo &X,
   1244                              const LocalRedeclarationsInfo &Y) {
   1245         return X.FirstID >= Y.FirstID;
   1246       }
   1247     };
   1248 
   1249     /// \brief Describes the categories of an Objective-C class.
   1250     struct ObjCCategoriesInfo {
   1251       DeclID DefinitionID; // The ID of the definition
   1252       unsigned Offset;     // Offset into the array of category lists.
   1253 
   1254       friend bool operator<(const ObjCCategoriesInfo &X,
   1255                             const ObjCCategoriesInfo &Y) {
   1256         return X.DefinitionID < Y.DefinitionID;
   1257       }
   1258 
   1259       friend bool operator>(const ObjCCategoriesInfo &X,
   1260                             const ObjCCategoriesInfo &Y) {
   1261         return X.DefinitionID > Y.DefinitionID;
   1262       }
   1263 
   1264       friend bool operator<=(const ObjCCategoriesInfo &X,
   1265                              const ObjCCategoriesInfo &Y) {
   1266         return X.DefinitionID <= Y.DefinitionID;
   1267       }
   1268 
   1269       friend bool operator>=(const ObjCCategoriesInfo &X,
   1270                              const ObjCCategoriesInfo &Y) {
   1271         return X.DefinitionID >= Y.DefinitionID;
   1272       }
   1273     };
   1274 
   1275     /// @}
   1276   }
   1277 } // end namespace clang
   1278 
   1279 #endif
   1280