Home | History | Annotate | Download | only in Serialization
      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_SERIALIZATION_ASTBITCODES_H
     18 #define LLVM_CLANG_SERIALIZATION_ASTBITCODES_H
     19 
     20 #include "clang/AST/Type.h"
     21 #include "llvm/ADT/DenseMap.h"
     22 #include "llvm/Bitcode/BitCodes.h"
     23 #include "llvm/Support/DataTypes.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 = 6;
     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 a macro in an AST file.
    131     typedef uint32_t MacroID;
    132 
    133     /// \brief A global ID number that refers to a macro in an AST file.
    134     typedef uint32_t GlobalMacroID;
    135 
    136     /// \brief A local to a module ID number that refers to a macro in an
    137     /// AST file.
    138     typedef uint32_t LocalMacroID;
    139 
    140     /// \brief The number of predefined macro IDs.
    141     const unsigned int NUM_PREDEF_MACRO_IDS = 1;
    142 
    143     /// \brief An ID number that refers to an ObjC selector in an AST file.
    144     typedef uint32_t SelectorID;
    145 
    146     /// \brief The number of predefined selector IDs.
    147     const unsigned int NUM_PREDEF_SELECTOR_IDS = 1;
    148 
    149     /// \brief An ID number that refers to a set of CXXBaseSpecifiers in an
    150     /// AST file.
    151     typedef uint32_t CXXBaseSpecifiersID;
    152 
    153     /// \brief An ID number that refers to a list of CXXCtorInitializers in an
    154     /// AST file.
    155     typedef uint32_t CXXCtorInitializersID;
    156 
    157     /// \brief An ID number that refers to an entity in the detailed
    158     /// preprocessing record.
    159     typedef uint32_t PreprocessedEntityID;
    160 
    161     /// \brief An ID number that refers to a submodule in a module file.
    162     typedef uint32_t SubmoduleID;
    163 
    164     /// \brief The number of predefined submodule IDs.
    165     const unsigned int NUM_PREDEF_SUBMODULE_IDS = 1;
    166 
    167     /// \brief Source range/offset of a preprocessed entity.
    168     struct PPEntityOffset {
    169       /// \brief Raw source location of beginning of range.
    170       unsigned Begin;
    171       /// \brief Raw source location of end of range.
    172       unsigned End;
    173       /// \brief Offset in the AST file.
    174       uint32_t BitOffset;
    175 
    176       PPEntityOffset(SourceRange R, uint32_t BitOffset)
    177         : Begin(R.getBegin().getRawEncoding()),
    178           End(R.getEnd().getRawEncoding()),
    179           BitOffset(BitOffset) { }
    180     };
    181 
    182     /// \brief Source range/offset of a preprocessed entity.
    183     struct DeclOffset {
    184       /// \brief Raw source location.
    185       unsigned Loc;
    186       /// \brief Offset in the AST file.
    187       uint32_t BitOffset;
    188 
    189       DeclOffset() : Loc(0), BitOffset(0) { }
    190       DeclOffset(SourceLocation Loc, uint32_t BitOffset)
    191         : Loc(Loc.getRawEncoding()),
    192           BitOffset(BitOffset) { }
    193       void setLocation(SourceLocation L) {
    194         Loc = L.getRawEncoding();
    195       }
    196     };
    197 
    198     /// \brief The number of predefined preprocessed entity IDs.
    199     const unsigned int NUM_PREDEF_PP_ENTITY_IDS = 1;
    200 
    201     /// \brief Describes the various kinds of blocks that occur within
    202     /// an AST file.
    203     enum BlockIDs {
    204       /// \brief The AST block, which acts as a container around the
    205       /// full AST block.
    206       AST_BLOCK_ID = llvm::bitc::FIRST_APPLICATION_BLOCKID,
    207 
    208       /// \brief The block containing information about the source
    209       /// manager.
    210       SOURCE_MANAGER_BLOCK_ID,
    211 
    212       /// \brief The block containing information about the
    213       /// preprocessor.
    214       PREPROCESSOR_BLOCK_ID,
    215 
    216       /// \brief The block containing the definitions of all of the
    217       /// types and decls used within the AST file.
    218       DECLTYPES_BLOCK_ID,
    219 
    220       /// \brief The block containing the detailed preprocessing record.
    221       PREPROCESSOR_DETAIL_BLOCK_ID,
    222 
    223       /// \brief The block containing the submodule structure.
    224       SUBMODULE_BLOCK_ID,
    225 
    226       /// \brief The block containing comments.
    227       COMMENTS_BLOCK_ID,
    228 
    229       /// \brief The control block, which contains all of the
    230       /// information that needs to be validated prior to committing
    231       /// to loading the AST file.
    232       CONTROL_BLOCK_ID,
    233 
    234       /// \brief The block of input files, which were used as inputs
    235       /// to create this AST file.
    236       ///
    237       /// This block is part of the control block.
    238       INPUT_FILES_BLOCK_ID
    239     };
    240 
    241     /// \brief Record types that occur within the control block.
    242     enum ControlRecordTypes {
    243       /// \brief AST file metadata, including the AST file version number
    244       /// and information about the compiler used to build this AST file.
    245       METADATA = 1,
    246 
    247       /// \brief Record code for the list of other AST files imported by
    248       /// this AST file.
    249       IMPORTS = 2,
    250 
    251       /// \brief Record code for the language options table.
    252       ///
    253       /// The record with this code contains the contents of the
    254       /// LangOptions structure. We serialize the entire contents of
    255       /// the structure, and let the reader decide which options are
    256       /// actually important to check.
    257       LANGUAGE_OPTIONS = 3,
    258 
    259       /// \brief Record code for the target options table.
    260       TARGET_OPTIONS = 4,
    261 
    262       /// \brief Record code for the original file that was used to
    263       /// generate the AST file, including both its file ID and its
    264       /// name.
    265       ORIGINAL_FILE = 5,
    266 
    267       /// \brief The directory that the PCH was originally created in.
    268       ORIGINAL_PCH_DIR = 6,
    269 
    270       /// \brief Record code for file ID of the file or buffer that was used to
    271       /// generate the AST file.
    272       ORIGINAL_FILE_ID = 7,
    273 
    274       /// \brief Offsets into the input-files block where input files
    275       /// reside.
    276       INPUT_FILE_OFFSETS = 8,
    277 
    278       /// \brief Record code for the diagnostic options table.
    279       DIAGNOSTIC_OPTIONS = 9,
    280 
    281       /// \brief Record code for the filesystem options table.
    282       FILE_SYSTEM_OPTIONS = 10,
    283 
    284       /// \brief Record code for the headers search options table.
    285       HEADER_SEARCH_OPTIONS = 11,
    286 
    287       /// \brief Record code for the preprocessor options table.
    288       PREPROCESSOR_OPTIONS = 12,
    289 
    290       /// \brief Record code for the module name.
    291       MODULE_NAME = 13,
    292 
    293       /// \brief Record code for the module map file that was used to build this
    294       /// AST file.
    295       MODULE_MAP_FILE = 14,
    296 
    297       /// \brief Record code for the signature that identifiers this AST file.
    298       SIGNATURE = 15,
    299 
    300       /// \brief Record code for the module build directory.
    301       MODULE_DIRECTORY = 16,
    302 
    303       /// \brief Record code for the list of other AST files made available by
    304       /// this AST file but not actually used by it.
    305       KNOWN_MODULE_FILES = 17,
    306     };
    307 
    308     /// \brief Record types that occur within the input-files block
    309     /// inside the control block.
    310     enum InputFileRecordTypes {
    311       /// \brief An input file.
    312       INPUT_FILE = 1
    313     };
    314 
    315     /// \brief Record types that occur within the AST block itself.
    316     enum ASTRecordTypes {
    317       /// \brief Record code for the offsets of each type.
    318       ///
    319       /// The TYPE_OFFSET constant describes the record that occurs
    320       /// within the AST block. The record itself is an array of offsets that
    321       /// point into the declarations and types block (identified by
    322       /// DECLTYPES_BLOCK_ID). The index into the array is based on the ID
    323       /// of a type. For a given type ID @c T, the lower three bits of
    324       /// @c T are its qualifiers (const, volatile, restrict), as in
    325       /// the QualType class. The upper bits, after being shifted and
    326       /// subtracting NUM_PREDEF_TYPE_IDS, are used to index into the
    327       /// TYPE_OFFSET block to determine the offset of that type's
    328       /// corresponding record within the DECLTYPES_BLOCK_ID block.
    329       TYPE_OFFSET = 1,
    330 
    331       /// \brief Record code for the offsets of each decl.
    332       ///
    333       /// The DECL_OFFSET constant describes the record that occurs
    334       /// within the block identified by DECL_OFFSETS_BLOCK_ID within
    335       /// the AST block. The record itself is an array of offsets that
    336       /// point into the declarations and types block (identified by
    337       /// DECLTYPES_BLOCK_ID). The declaration ID is an index into this
    338       /// record, after subtracting one to account for the use of
    339       /// declaration ID 0 for a NULL declaration pointer. Index 0 is
    340       /// reserved for the translation unit declaration.
    341       DECL_OFFSET = 2,
    342 
    343       /// \brief Record code for the table of offsets of each
    344       /// identifier ID.
    345       ///
    346       /// The offset table contains offsets into the blob stored in
    347       /// the IDENTIFIER_TABLE record. Each offset points to the
    348       /// NULL-terminated string that corresponds to that identifier.
    349       IDENTIFIER_OFFSET = 3,
    350 
    351       /// \brief This is so that older clang versions, before the introduction
    352       /// of the control block, can read and reject the newer PCH format.
    353       /// *DON"T CHANGE THIS NUMBER*.
    354       METADATA_OLD_FORMAT = 4,
    355 
    356       /// \brief Record code for the identifier table.
    357       ///
    358       /// The identifier table is a simple blob that contains
    359       /// NULL-terminated strings for all of the identifiers
    360       /// referenced by the AST file. The IDENTIFIER_OFFSET table
    361       /// contains the mapping from identifier IDs to the characters
    362       /// in this blob. Note that the starting offsets of all of the
    363       /// identifiers are odd, so that, when the identifier offset
    364       /// table is loaded in, we can use the low bit to distinguish
    365       /// between offsets (for unresolved identifier IDs) and
    366       /// IdentifierInfo pointers (for already-resolved identifier
    367       /// IDs).
    368       IDENTIFIER_TABLE = 5,
    369 
    370       /// \brief Record code for the array of eagerly deserialized decls.
    371       ///
    372       /// The AST file contains a list of all of the declarations that should be
    373       /// eagerly deserialized present within the parsed headers, stored as an
    374       /// array of declaration IDs. These declarations will be
    375       /// reported to the AST consumer after the AST file has been
    376       /// read, since their presence can affect the semantics of the
    377       /// program (e.g., for code generation).
    378       EAGERLY_DESERIALIZED_DECLS = 6,
    379 
    380       /// \brief Record code for the set of non-builtin, special
    381       /// types.
    382       ///
    383       /// This record contains the type IDs for the various type nodes
    384       /// that are constructed during semantic analysis (e.g.,
    385       /// __builtin_va_list). The SPECIAL_TYPE_* constants provide
    386       /// offsets into this record.
    387       SPECIAL_TYPES = 7,
    388 
    389       /// \brief Record code for the extra statistics we gather while
    390       /// generating an AST file.
    391       STATISTICS = 8,
    392 
    393       /// \brief Record code for the array of tentative definitions.
    394       TENTATIVE_DEFINITIONS = 9,
    395 
    396       // ID 10 used to be for a list of extern "C" declarations.
    397 
    398       /// \brief Record code for the table of offsets into the
    399       /// Objective-C method pool.
    400       SELECTOR_OFFSETS = 11,
    401 
    402       /// \brief Record code for the Objective-C method pool,
    403       METHOD_POOL = 12,
    404 
    405       /// \brief The value of the next __COUNTER__ to dispense.
    406       /// [PP_COUNTER_VALUE, Val]
    407       PP_COUNTER_VALUE = 13,
    408 
    409       /// \brief Record code for the table of offsets into the block
    410       /// of source-location information.
    411       SOURCE_LOCATION_OFFSETS = 14,
    412 
    413       /// \brief Record code for the set of source location entries
    414       /// that need to be preloaded by the AST reader.
    415       ///
    416       /// This set contains the source location entry for the
    417       /// predefines buffer and for any file entries that need to be
    418       /// preloaded.
    419       SOURCE_LOCATION_PRELOADS = 15,
    420 
    421       /// \brief Record code for the set of ext_vector type names.
    422       EXT_VECTOR_DECLS = 16,
    423 
    424       /// \brief Record code for the array of unused file scoped decls.
    425       UNUSED_FILESCOPED_DECLS = 17,
    426 
    427       /// \brief Record code for the table of offsets to entries in the
    428       /// preprocessing record.
    429       PPD_ENTITIES_OFFSETS = 18,
    430 
    431       /// \brief Record code for the array of VTable uses.
    432       VTABLE_USES = 19,
    433 
    434       // ID 20 used to be for a list of dynamic classes.
    435 
    436       /// \brief Record code for referenced selector pool.
    437       REFERENCED_SELECTOR_POOL = 21,
    438 
    439       /// \brief Record code for an update to the TU's lexically contained
    440       /// declarations.
    441       TU_UPDATE_LEXICAL = 22,
    442 
    443       /// \brief Record code for the array describing the locations (in the
    444       /// LOCAL_REDECLARATIONS record) of the redeclaration chains, indexed by
    445       /// the first known ID.
    446       LOCAL_REDECLARATIONS_MAP = 23,
    447 
    448       /// \brief Record code for declarations that Sema keeps references of.
    449       SEMA_DECL_REFS = 24,
    450 
    451       /// \brief Record code for weak undeclared identifiers.
    452       WEAK_UNDECLARED_IDENTIFIERS = 25,
    453 
    454       /// \brief Record code for pending implicit instantiations.
    455       PENDING_IMPLICIT_INSTANTIATIONS = 26,
    456 
    457       /// \brief Record code for a decl replacement block.
    458       ///
    459       /// If a declaration is modified after having been deserialized, and then
    460       /// written to a dependent AST file, its ID and offset must be added to
    461       /// the replacement block.
    462       DECL_REPLACEMENTS = 27,
    463 
    464       /// \brief Record code for an update to a decl context's lookup table.
    465       ///
    466       /// In practice, this should only be used for the TU and namespaces.
    467       UPDATE_VISIBLE = 28,
    468 
    469       /// \brief Record for offsets of DECL_UPDATES records for declarations
    470       /// that were modified after being deserialized and need updates.
    471       DECL_UPDATE_OFFSETS = 29,
    472 
    473       /// \brief Record of updates for a declaration that was modified after
    474       /// being deserialized.
    475       DECL_UPDATES = 30,
    476 
    477       /// \brief Record code for the table of offsets to CXXBaseSpecifier
    478       /// sets.
    479       CXX_BASE_SPECIFIER_OFFSETS = 31,
    480 
    481       /// \brief Record code for \#pragma diagnostic mappings.
    482       DIAG_PRAGMA_MAPPINGS = 32,
    483 
    484       /// \brief Record code for special CUDA declarations.
    485       CUDA_SPECIAL_DECL_REFS = 33,
    486 
    487       /// \brief Record code for header search information.
    488       HEADER_SEARCH_TABLE = 34,
    489 
    490       /// \brief Record code for floating point \#pragma options.
    491       FP_PRAGMA_OPTIONS = 35,
    492 
    493       /// \brief Record code for enabled OpenCL extensions.
    494       OPENCL_EXTENSIONS = 36,
    495 
    496       /// \brief The list of delegating constructor declarations.
    497       DELEGATING_CTORS = 37,
    498 
    499       /// \brief Record code for the set of known namespaces, which are used
    500       /// for typo correction.
    501       KNOWN_NAMESPACES = 38,
    502 
    503       /// \brief Record code for the remapping information used to relate
    504       /// loaded modules to the various offsets and IDs(e.g., source location
    505       /// offests, declaration and type IDs) that are used in that module to
    506       /// refer to other modules.
    507       MODULE_OFFSET_MAP = 39,
    508 
    509       /// \brief Record code for the source manager line table information,
    510       /// which stores information about \#line directives.
    511       SOURCE_MANAGER_LINE_TABLE = 40,
    512 
    513       /// \brief Record code for map of Objective-C class definition IDs to the
    514       /// ObjC categories in a module that are attached to that class.
    515       OBJC_CATEGORIES_MAP = 41,
    516 
    517       /// \brief Record code for a file sorted array of DeclIDs in a module.
    518       FILE_SORTED_DECLS = 42,
    519 
    520       /// \brief Record code for an array of all of the (sub)modules that were
    521       /// imported by the AST file.
    522       IMPORTED_MODULES = 43,
    523 
    524       // ID 40 used to be a table of merged canonical declarations.
    525 
    526       /// \brief Record code for the array of redeclaration chains.
    527       ///
    528       /// This array can only be interpreted properly using the local
    529       /// redeclarations map.
    530       LOCAL_REDECLARATIONS = 45,
    531 
    532       /// \brief Record code for the array of Objective-C categories (including
    533       /// extensions).
    534       ///
    535       /// This array can only be interpreted properly using the Objective-C
    536       /// categories map.
    537       OBJC_CATEGORIES = 46,
    538 
    539       /// \brief Record code for the table of offsets of each macro ID.
    540       ///
    541       /// The offset table contains offsets into the blob stored in
    542       /// the preprocessor block. Each offset points to the corresponding
    543       /// macro definition.
    544       MACRO_OFFSET = 47,
    545 
    546       // ID 48 used to be a table of macros.
    547 
    548       /// \brief Record code for undefined but used functions and variables that
    549       /// need a definition in this TU.
    550       UNDEFINED_BUT_USED = 49,
    551 
    552       /// \brief Record code for late parsed template functions.
    553       LATE_PARSED_TEMPLATE = 50,
    554 
    555       /// \brief Record code for \#pragma optimize options.
    556       OPTIMIZE_PRAGMA_OPTIONS = 51,
    557 
    558       /// \brief Record code for potentially unused local typedef names.
    559       UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES = 52,
    560 
    561       /// \brief Record code for the table of offsets to CXXCtorInitializers
    562       /// lists.
    563       CXX_CTOR_INITIALIZERS_OFFSETS = 53,
    564     };
    565 
    566     /// \brief Record types used within a source manager block.
    567     enum SourceManagerRecordTypes {
    568       /// \brief Describes a source location entry (SLocEntry) for a
    569       /// file.
    570       SM_SLOC_FILE_ENTRY = 1,
    571       /// \brief Describes a source location entry (SLocEntry) for a
    572       /// buffer.
    573       SM_SLOC_BUFFER_ENTRY = 2,
    574       /// \brief Describes a blob that contains the data for a buffer
    575       /// entry. This kind of record always directly follows a
    576       /// SM_SLOC_BUFFER_ENTRY record or a SM_SLOC_FILE_ENTRY with an
    577       /// overridden buffer.
    578       SM_SLOC_BUFFER_BLOB = 3,
    579       /// \brief Describes a source location entry (SLocEntry) for a
    580       /// macro expansion.
    581       SM_SLOC_EXPANSION_ENTRY = 4
    582     };
    583 
    584     /// \brief Record types used within a preprocessor block.
    585     enum PreprocessorRecordTypes {
    586       // The macros in the PP section are a PP_MACRO_* instance followed by a
    587       // list of PP_TOKEN instances for each token in the definition.
    588 
    589       /// \brief An object-like macro definition.
    590       /// [PP_MACRO_OBJECT_LIKE, IdentInfoID, SLoc, IsUsed]
    591       PP_MACRO_OBJECT_LIKE = 1,
    592 
    593       /// \brief A function-like macro definition.
    594       /// [PP_MACRO_FUNCTION_LIKE, \<ObjectLikeStuff>, IsC99Varargs,
    595       /// IsGNUVarars, NumArgs, ArgIdentInfoID* ]
    596       PP_MACRO_FUNCTION_LIKE = 2,
    597 
    598       /// \brief Describes one token.
    599       /// [PP_TOKEN, SLoc, Length, IdentInfoID, Kind, Flags]
    600       PP_TOKEN = 3,
    601 
    602       /// \brief The macro directives history for a particular identifier.
    603       PP_MACRO_DIRECTIVE_HISTORY = 4
    604     };
    605 
    606     /// \brief Record types used within a preprocessor detail block.
    607     enum PreprocessorDetailRecordTypes {
    608       /// \brief Describes a macro expansion within the preprocessing record.
    609       PPD_MACRO_EXPANSION = 0,
    610 
    611       /// \brief Describes a macro definition within the preprocessing record.
    612       PPD_MACRO_DEFINITION = 1,
    613 
    614       /// \brief Describes an inclusion directive within the preprocessing
    615       /// record.
    616       PPD_INCLUSION_DIRECTIVE = 2
    617     };
    618 
    619     /// \brief Record types used within a submodule description block.
    620     enum SubmoduleRecordTypes {
    621       /// \brief Metadata for submodules as a whole.
    622       SUBMODULE_METADATA = 0,
    623       /// \brief Defines the major attributes of a submodule, including its
    624       /// name and parent.
    625       SUBMODULE_DEFINITION = 1,
    626       /// \brief Specifies the umbrella header used to create this module,
    627       /// if any.
    628       SUBMODULE_UMBRELLA_HEADER = 2,
    629       /// \brief Specifies a header that falls into this (sub)module.
    630       SUBMODULE_HEADER = 3,
    631       /// \brief Specifies a top-level header that falls into this (sub)module.
    632       SUBMODULE_TOPHEADER = 4,
    633       /// \brief Specifies an umbrella directory.
    634       SUBMODULE_UMBRELLA_DIR = 5,
    635       /// \brief Specifies the submodules that are imported by this
    636       /// submodule.
    637       SUBMODULE_IMPORTS = 6,
    638       /// \brief Specifies the submodules that are re-exported from this
    639       /// submodule.
    640       SUBMODULE_EXPORTS = 7,
    641       /// \brief Specifies a required feature.
    642       SUBMODULE_REQUIRES = 8,
    643       /// \brief Specifies a header that has been explicitly excluded
    644       /// from this submodule.
    645       SUBMODULE_EXCLUDED_HEADER = 9,
    646       /// \brief Specifies a library or framework to link against.
    647       SUBMODULE_LINK_LIBRARY = 10,
    648       /// \brief Specifies a configuration macro for this module.
    649       SUBMODULE_CONFIG_MACRO = 11,
    650       /// \brief Specifies a conflict with another module.
    651       SUBMODULE_CONFLICT = 12,
    652       /// \brief Specifies a header that is private to this submodule.
    653       SUBMODULE_PRIVATE_HEADER = 13,
    654       /// \brief Specifies a header that is part of the module but must be
    655       /// textually included.
    656       SUBMODULE_TEXTUAL_HEADER = 14,
    657       /// \brief Specifies a header that is private to this submodule but
    658       /// must be textually included.
    659       SUBMODULE_PRIVATE_TEXTUAL_HEADER = 15,
    660     };
    661 
    662     /// \brief Record types used within a comments block.
    663     enum CommentRecordTypes {
    664       COMMENTS_RAW_COMMENT = 0
    665     };
    666 
    667     /// \defgroup ASTAST AST file AST constants
    668     ///
    669     /// The constants in this group describe various components of the
    670     /// abstract syntax tree within an AST file.
    671     ///
    672     /// @{
    673 
    674     /// \brief Predefined type IDs.
    675     ///
    676     /// These type IDs correspond to predefined types in the AST
    677     /// context, such as built-in types (int) and special place-holder
    678     /// types (the \<overload> and \<dependent> type markers). Such
    679     /// types are never actually serialized, since they will be built
    680     /// by the AST context when it is created.
    681     enum PredefinedTypeIDs {
    682       /// \brief The NULL type.
    683       PREDEF_TYPE_NULL_ID       = 0,
    684       /// \brief The void type.
    685       PREDEF_TYPE_VOID_ID       = 1,
    686       /// \brief The 'bool' or '_Bool' type.
    687       PREDEF_TYPE_BOOL_ID       = 2,
    688       /// \brief The 'char' type, when it is unsigned.
    689       PREDEF_TYPE_CHAR_U_ID     = 3,
    690       /// \brief The 'unsigned char' type.
    691       PREDEF_TYPE_UCHAR_ID      = 4,
    692       /// \brief The 'unsigned short' type.
    693       PREDEF_TYPE_USHORT_ID     = 5,
    694       /// \brief The 'unsigned int' type.
    695       PREDEF_TYPE_UINT_ID       = 6,
    696       /// \brief The 'unsigned long' type.
    697       PREDEF_TYPE_ULONG_ID      = 7,
    698       /// \brief The 'unsigned long long' type.
    699       PREDEF_TYPE_ULONGLONG_ID  = 8,
    700       /// \brief The 'char' type, when it is signed.
    701       PREDEF_TYPE_CHAR_S_ID     = 9,
    702       /// \brief The 'signed char' type.
    703       PREDEF_TYPE_SCHAR_ID      = 10,
    704       /// \brief The C++ 'wchar_t' type.
    705       PREDEF_TYPE_WCHAR_ID      = 11,
    706       /// \brief The (signed) 'short' type.
    707       PREDEF_TYPE_SHORT_ID      = 12,
    708       /// \brief The (signed) 'int' type.
    709       PREDEF_TYPE_INT_ID        = 13,
    710       /// \brief The (signed) 'long' type.
    711       PREDEF_TYPE_LONG_ID       = 14,
    712       /// \brief The (signed) 'long long' type.
    713       PREDEF_TYPE_LONGLONG_ID   = 15,
    714       /// \brief The 'float' type.
    715       PREDEF_TYPE_FLOAT_ID      = 16,
    716       /// \brief The 'double' type.
    717       PREDEF_TYPE_DOUBLE_ID     = 17,
    718       /// \brief The 'long double' type.
    719       PREDEF_TYPE_LONGDOUBLE_ID = 18,
    720       /// \brief The placeholder type for overloaded function sets.
    721       PREDEF_TYPE_OVERLOAD_ID   = 19,
    722       /// \brief The placeholder type for dependent types.
    723       PREDEF_TYPE_DEPENDENT_ID  = 20,
    724       /// \brief The '__uint128_t' type.
    725       PREDEF_TYPE_UINT128_ID    = 21,
    726       /// \brief The '__int128_t' type.
    727       PREDEF_TYPE_INT128_ID     = 22,
    728       /// \brief The type of 'nullptr'.
    729       PREDEF_TYPE_NULLPTR_ID    = 23,
    730       /// \brief The C++ 'char16_t' type.
    731       PREDEF_TYPE_CHAR16_ID     = 24,
    732       /// \brief The C++ 'char32_t' type.
    733       PREDEF_TYPE_CHAR32_ID     = 25,
    734       /// \brief The ObjC 'id' type.
    735       PREDEF_TYPE_OBJC_ID       = 26,
    736       /// \brief The ObjC 'Class' type.
    737       PREDEF_TYPE_OBJC_CLASS    = 27,
    738       /// \brief The ObjC 'SEL' type.
    739       PREDEF_TYPE_OBJC_SEL      = 28,
    740       /// \brief The 'unknown any' placeholder type.
    741       PREDEF_TYPE_UNKNOWN_ANY   = 29,
    742       /// \brief The placeholder type for bound member functions.
    743       PREDEF_TYPE_BOUND_MEMBER  = 30,
    744       /// \brief The "auto" deduction type.
    745       PREDEF_TYPE_AUTO_DEDUCT   = 31,
    746       /// \brief The "auto &&" deduction type.
    747       PREDEF_TYPE_AUTO_RREF_DEDUCT = 32,
    748       /// \brief The OpenCL 'half' / ARM NEON __fp16 type.
    749       PREDEF_TYPE_HALF_ID       = 33,
    750       /// \brief ARC's unbridged-cast placeholder type.
    751       PREDEF_TYPE_ARC_UNBRIDGED_CAST = 34,
    752       /// \brief The pseudo-object placeholder type.
    753       PREDEF_TYPE_PSEUDO_OBJECT = 35,
    754       /// \brief The __va_list_tag placeholder type.
    755       PREDEF_TYPE_VA_LIST_TAG = 36,
    756       /// \brief The placeholder type for builtin functions.
    757       PREDEF_TYPE_BUILTIN_FN = 37,
    758       /// \brief OpenCL 1d image type.
    759       PREDEF_TYPE_IMAGE1D_ID    = 38,
    760       /// \brief OpenCL 1d image array type.
    761       PREDEF_TYPE_IMAGE1D_ARR_ID = 39,
    762       /// \brief OpenCL 1d image buffer type.
    763       PREDEF_TYPE_IMAGE1D_BUFF_ID = 40,
    764       /// \brief OpenCL 2d image type.
    765       PREDEF_TYPE_IMAGE2D_ID    = 41,
    766       /// \brief OpenCL 2d image array type.
    767       PREDEF_TYPE_IMAGE2D_ARR_ID = 42,
    768       /// \brief OpenCL 3d image type.
    769       PREDEF_TYPE_IMAGE3D_ID    = 43,
    770       /// \brief OpenCL event type.
    771       PREDEF_TYPE_EVENT_ID      = 44,
    772       /// \brief OpenCL sampler type.
    773       PREDEF_TYPE_SAMPLER_ID    = 45
    774     };
    775 
    776     /// \brief The number of predefined type IDs that are reserved for
    777     /// the PREDEF_TYPE_* constants.
    778     ///
    779     /// Type IDs for non-predefined types will start at
    780     /// NUM_PREDEF_TYPE_IDs.
    781     const unsigned NUM_PREDEF_TYPE_IDS = 100;
    782 
    783     /// \brief Record codes for each kind of type.
    784     ///
    785     /// These constants describe the type records that can occur within a
    786     /// block identified by DECLTYPES_BLOCK_ID in the AST file. Each
    787     /// constant describes a record for a specific type class in the
    788     /// AST.
    789     enum TypeCode {
    790       /// \brief An ExtQualType record.
    791       TYPE_EXT_QUAL                 = 1,
    792       /// \brief A ComplexType record.
    793       TYPE_COMPLEX                  = 3,
    794       /// \brief A PointerType record.
    795       TYPE_POINTER                  = 4,
    796       /// \brief A BlockPointerType record.
    797       TYPE_BLOCK_POINTER            = 5,
    798       /// \brief An LValueReferenceType record.
    799       TYPE_LVALUE_REFERENCE         = 6,
    800       /// \brief An RValueReferenceType record.
    801       TYPE_RVALUE_REFERENCE         = 7,
    802       /// \brief A MemberPointerType record.
    803       TYPE_MEMBER_POINTER           = 8,
    804       /// \brief A ConstantArrayType record.
    805       TYPE_CONSTANT_ARRAY           = 9,
    806       /// \brief An IncompleteArrayType record.
    807       TYPE_INCOMPLETE_ARRAY         = 10,
    808       /// \brief A VariableArrayType record.
    809       TYPE_VARIABLE_ARRAY           = 11,
    810       /// \brief A VectorType record.
    811       TYPE_VECTOR                   = 12,
    812       /// \brief An ExtVectorType record.
    813       TYPE_EXT_VECTOR               = 13,
    814       /// \brief A FunctionNoProtoType record.
    815       TYPE_FUNCTION_NO_PROTO        = 14,
    816       /// \brief A FunctionProtoType record.
    817       TYPE_FUNCTION_PROTO           = 15,
    818       /// \brief A TypedefType record.
    819       TYPE_TYPEDEF                  = 16,
    820       /// \brief A TypeOfExprType record.
    821       TYPE_TYPEOF_EXPR              = 17,
    822       /// \brief A TypeOfType record.
    823       TYPE_TYPEOF                   = 18,
    824       /// \brief A RecordType record.
    825       TYPE_RECORD                   = 19,
    826       /// \brief An EnumType record.
    827       TYPE_ENUM                     = 20,
    828       /// \brief An ObjCInterfaceType record.
    829       TYPE_OBJC_INTERFACE           = 21,
    830       /// \brief An ObjCObjectPointerType record.
    831       TYPE_OBJC_OBJECT_POINTER      = 22,
    832       /// \brief a DecltypeType record.
    833       TYPE_DECLTYPE                 = 23,
    834       /// \brief An ElaboratedType record.
    835       TYPE_ELABORATED               = 24,
    836       /// \brief A SubstTemplateTypeParmType record.
    837       TYPE_SUBST_TEMPLATE_TYPE_PARM = 25,
    838       /// \brief An UnresolvedUsingType record.
    839       TYPE_UNRESOLVED_USING         = 26,
    840       /// \brief An InjectedClassNameType record.
    841       TYPE_INJECTED_CLASS_NAME      = 27,
    842       /// \brief An ObjCObjectType record.
    843       TYPE_OBJC_OBJECT              = 28,
    844       /// \brief An TemplateTypeParmType record.
    845       TYPE_TEMPLATE_TYPE_PARM       = 29,
    846       /// \brief An TemplateSpecializationType record.
    847       TYPE_TEMPLATE_SPECIALIZATION  = 30,
    848       /// \brief A DependentNameType record.
    849       TYPE_DEPENDENT_NAME           = 31,
    850       /// \brief A DependentTemplateSpecializationType record.
    851       TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION = 32,
    852       /// \brief A DependentSizedArrayType record.
    853       TYPE_DEPENDENT_SIZED_ARRAY    = 33,
    854       /// \brief A ParenType record.
    855       TYPE_PAREN                    = 34,
    856       /// \brief A PackExpansionType record.
    857       TYPE_PACK_EXPANSION           = 35,
    858       /// \brief An AttributedType record.
    859       TYPE_ATTRIBUTED               = 36,
    860       /// \brief A SubstTemplateTypeParmPackType record.
    861       TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK = 37,
    862       /// \brief A AutoType record.
    863       TYPE_AUTO                  = 38,
    864       /// \brief A UnaryTransformType record.
    865       TYPE_UNARY_TRANSFORM       = 39,
    866       /// \brief An AtomicType record.
    867       TYPE_ATOMIC                = 40,
    868       /// \brief A DecayedType record.
    869       TYPE_DECAYED               = 41,
    870       /// \brief An AdjustedType record.
    871       TYPE_ADJUSTED              = 42
    872     };
    873 
    874     /// \brief The type IDs for special types constructed by semantic
    875     /// analysis.
    876     ///
    877     /// The constants in this enumeration are indices into the
    878     /// SPECIAL_TYPES record.
    879     enum SpecialTypeIDs {
    880       /// \brief CFConstantString type
    881       SPECIAL_TYPE_CF_CONSTANT_STRING          = 0,
    882       /// \brief C FILE typedef type
    883       SPECIAL_TYPE_FILE                        = 1,
    884       /// \brief C jmp_buf typedef type
    885       SPECIAL_TYPE_JMP_BUF                     = 2,
    886       /// \brief C sigjmp_buf typedef type
    887       SPECIAL_TYPE_SIGJMP_BUF                  = 3,
    888       /// \brief Objective-C "id" redefinition type
    889       SPECIAL_TYPE_OBJC_ID_REDEFINITION        = 4,
    890       /// \brief Objective-C "Class" redefinition type
    891       SPECIAL_TYPE_OBJC_CLASS_REDEFINITION     = 5,
    892       /// \brief Objective-C "SEL" redefinition type
    893       SPECIAL_TYPE_OBJC_SEL_REDEFINITION       = 6,
    894       /// \brief C ucontext_t typedef type
    895       SPECIAL_TYPE_UCONTEXT_T                  = 7
    896     };
    897 
    898     /// \brief The number of special type IDs.
    899     const unsigned NumSpecialTypeIDs = 8;
    900 
    901     /// \brief Predefined declaration IDs.
    902     ///
    903     /// These declaration IDs correspond to predefined declarations in the AST
    904     /// context, such as the NULL declaration ID. Such declarations are never
    905     /// actually serialized, since they will be built by the AST context when
    906     /// it is created.
    907     enum PredefinedDeclIDs {
    908       /// \brief The NULL declaration.
    909       PREDEF_DECL_NULL_ID       = 0,
    910 
    911       /// \brief The translation unit.
    912       PREDEF_DECL_TRANSLATION_UNIT_ID = 1,
    913 
    914       /// \brief The Objective-C 'id' type.
    915       PREDEF_DECL_OBJC_ID_ID = 2,
    916 
    917       /// \brief The Objective-C 'SEL' type.
    918       PREDEF_DECL_OBJC_SEL_ID = 3,
    919 
    920       /// \brief The Objective-C 'Class' type.
    921       PREDEF_DECL_OBJC_CLASS_ID = 4,
    922 
    923       /// \brief The Objective-C 'Protocol' type.
    924       PREDEF_DECL_OBJC_PROTOCOL_ID = 5,
    925 
    926       /// \brief The signed 128-bit integer type.
    927       PREDEF_DECL_INT_128_ID = 6,
    928 
    929       /// \brief The unsigned 128-bit integer type.
    930       PREDEF_DECL_UNSIGNED_INT_128_ID = 7,
    931 
    932       /// \brief The internal 'instancetype' typedef.
    933       PREDEF_DECL_OBJC_INSTANCETYPE_ID = 8,
    934 
    935       /// \brief The internal '__builtin_va_list' typedef.
    936       PREDEF_DECL_BUILTIN_VA_LIST_ID = 9,
    937 
    938       /// \brief The extern "C" context.
    939       PREDEF_DECL_EXTERN_C_CONTEXT_ID = 10,
    940     };
    941 
    942     /// \brief The number of declaration IDs that are predefined.
    943     ///
    944     /// For more information about predefined declarations, see the
    945     /// \c PredefinedDeclIDs type and the PREDEF_DECL_*_ID constants.
    946     const unsigned int NUM_PREDEF_DECL_IDS = 11;
    947 
    948     /// \brief Record codes for each kind of declaration.
    949     ///
    950     /// These constants describe the declaration records that can occur within
    951     /// a declarations block (identified by DECLS_BLOCK_ID). Each
    952     /// constant describes a record for a specific declaration class
    953     /// in the AST.
    954     enum DeclCode {
    955       /// \brief A TypedefDecl record.
    956       DECL_TYPEDEF = 51,
    957       /// \brief A TypeAliasDecl record.
    958       DECL_TYPEALIAS,
    959       /// \brief An EnumDecl record.
    960       DECL_ENUM,
    961       /// \brief A RecordDecl record.
    962       DECL_RECORD,
    963       /// \brief An EnumConstantDecl record.
    964       DECL_ENUM_CONSTANT,
    965       /// \brief A FunctionDecl record.
    966       DECL_FUNCTION,
    967       /// \brief A ObjCMethodDecl record.
    968       DECL_OBJC_METHOD,
    969       /// \brief A ObjCInterfaceDecl record.
    970       DECL_OBJC_INTERFACE,
    971       /// \brief A ObjCProtocolDecl record.
    972       DECL_OBJC_PROTOCOL,
    973       /// \brief A ObjCIvarDecl record.
    974       DECL_OBJC_IVAR,
    975       /// \brief A ObjCAtDefsFieldDecl record.
    976       DECL_OBJC_AT_DEFS_FIELD,
    977       /// \brief A ObjCCategoryDecl record.
    978       DECL_OBJC_CATEGORY,
    979       /// \brief A ObjCCategoryImplDecl record.
    980       DECL_OBJC_CATEGORY_IMPL,
    981       /// \brief A ObjCImplementationDecl record.
    982       DECL_OBJC_IMPLEMENTATION,
    983       /// \brief A ObjCCompatibleAliasDecl record.
    984       DECL_OBJC_COMPATIBLE_ALIAS,
    985       /// \brief A ObjCPropertyDecl record.
    986       DECL_OBJC_PROPERTY,
    987       /// \brief A ObjCPropertyImplDecl record.
    988       DECL_OBJC_PROPERTY_IMPL,
    989       /// \brief A FieldDecl record.
    990       DECL_FIELD,
    991       /// \brief A MSPropertyDecl record.
    992       DECL_MS_PROPERTY,
    993       /// \brief A VarDecl record.
    994       DECL_VAR,
    995       /// \brief An ImplicitParamDecl record.
    996       DECL_IMPLICIT_PARAM,
    997       /// \brief A ParmVarDecl record.
    998       DECL_PARM_VAR,
    999       /// \brief A FileScopeAsmDecl record.
   1000       DECL_FILE_SCOPE_ASM,
   1001       /// \brief A BlockDecl record.
   1002       DECL_BLOCK,
   1003       /// \brief A CapturedDecl record.
   1004       DECL_CAPTURED,
   1005       /// \brief A record that stores the set of declarations that are
   1006       /// lexically stored within a given DeclContext.
   1007       ///
   1008       /// The record itself is a blob that is an array of declaration IDs,
   1009       /// in the order in which those declarations were added to the
   1010       /// declaration context. This data is used when iterating over
   1011       /// the contents of a DeclContext, e.g., via
   1012       /// DeclContext::decls_begin() and DeclContext::decls_end().
   1013       DECL_CONTEXT_LEXICAL,
   1014       /// \brief A record that stores the set of declarations that are
   1015       /// visible from a given DeclContext.
   1016       ///
   1017       /// The record itself stores a set of mappings, each of which
   1018       /// associates a declaration name with one or more declaration
   1019       /// IDs. This data is used when performing qualified name lookup
   1020       /// into a DeclContext via DeclContext::lookup.
   1021       DECL_CONTEXT_VISIBLE,
   1022       /// \brief A LabelDecl record.
   1023       DECL_LABEL,
   1024       /// \brief A NamespaceDecl record.
   1025       DECL_NAMESPACE,
   1026       /// \brief A NamespaceAliasDecl record.
   1027       DECL_NAMESPACE_ALIAS,
   1028       /// \brief A UsingDecl record.
   1029       DECL_USING,
   1030       /// \brief A UsingShadowDecl record.
   1031       DECL_USING_SHADOW,
   1032       /// \brief A UsingDirecitveDecl record.
   1033       DECL_USING_DIRECTIVE,
   1034       /// \brief An UnresolvedUsingValueDecl record.
   1035       DECL_UNRESOLVED_USING_VALUE,
   1036       /// \brief An UnresolvedUsingTypenameDecl record.
   1037       DECL_UNRESOLVED_USING_TYPENAME,
   1038       /// \brief A LinkageSpecDecl record.
   1039       DECL_LINKAGE_SPEC,
   1040       /// \brief A CXXRecordDecl record.
   1041       DECL_CXX_RECORD,
   1042       /// \brief A CXXMethodDecl record.
   1043       DECL_CXX_METHOD,
   1044       /// \brief A CXXConstructorDecl record.
   1045       DECL_CXX_CONSTRUCTOR,
   1046       /// \brief A CXXDestructorDecl record.
   1047       DECL_CXX_DESTRUCTOR,
   1048       /// \brief A CXXConversionDecl record.
   1049       DECL_CXX_CONVERSION,
   1050       /// \brief An AccessSpecDecl record.
   1051       DECL_ACCESS_SPEC,
   1052 
   1053       /// \brief A FriendDecl record.
   1054       DECL_FRIEND,
   1055       /// \brief A FriendTemplateDecl record.
   1056       DECL_FRIEND_TEMPLATE,
   1057       /// \brief A ClassTemplateDecl record.
   1058       DECL_CLASS_TEMPLATE,
   1059       /// \brief A ClassTemplateSpecializationDecl record.
   1060       DECL_CLASS_TEMPLATE_SPECIALIZATION,
   1061       /// \brief A ClassTemplatePartialSpecializationDecl record.
   1062       DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION,
   1063       /// \brief A VarTemplateDecl record.
   1064       DECL_VAR_TEMPLATE,
   1065       /// \brief A VarTemplateSpecializationDecl record.
   1066       DECL_VAR_TEMPLATE_SPECIALIZATION,
   1067       /// \brief A VarTemplatePartialSpecializationDecl record.
   1068       DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION,
   1069       /// \brief A FunctionTemplateDecl record.
   1070       DECL_FUNCTION_TEMPLATE,
   1071       /// \brief A TemplateTypeParmDecl record.
   1072       DECL_TEMPLATE_TYPE_PARM,
   1073       /// \brief A NonTypeTemplateParmDecl record.
   1074       DECL_NON_TYPE_TEMPLATE_PARM,
   1075       /// \brief A TemplateTemplateParmDecl record.
   1076       DECL_TEMPLATE_TEMPLATE_PARM,
   1077       /// \brief A TypeAliasTemplateDecl record.
   1078       DECL_TYPE_ALIAS_TEMPLATE,
   1079       /// \brief A StaticAssertDecl record.
   1080       DECL_STATIC_ASSERT,
   1081       /// \brief A record containing CXXBaseSpecifiers.
   1082       DECL_CXX_BASE_SPECIFIERS,
   1083       /// \brief A record containing CXXCtorInitializers.
   1084       DECL_CXX_CTOR_INITIALIZERS,
   1085       /// \brief A IndirectFieldDecl record.
   1086       DECL_INDIRECTFIELD,
   1087       /// \brief A NonTypeTemplateParmDecl record that stores an expanded
   1088       /// non-type template parameter pack.
   1089       DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK,
   1090       /// \brief A TemplateTemplateParmDecl record that stores an expanded
   1091       /// template template parameter pack.
   1092       DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK,
   1093       /// \brief A ClassScopeFunctionSpecializationDecl record a class scope
   1094       /// function specialization. (Microsoft extension).
   1095       DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION,
   1096       /// \brief An ImportDecl recording a module import.
   1097       DECL_IMPORT,
   1098       /// \brief An OMPThreadPrivateDecl record.
   1099       DECL_OMP_THREADPRIVATE,
   1100       /// \brief An EmptyDecl record.
   1101       DECL_EMPTY
   1102     };
   1103 
   1104     /// \brief Record codes for each kind of statement or expression.
   1105     ///
   1106     /// These constants describe the records that describe statements
   1107     /// or expressions. These records  occur within type and declarations
   1108     /// block, so they begin with record values of 128.  Each constant
   1109     /// describes a record for a specific statement or expression class in the
   1110     /// AST.
   1111     enum StmtCode {
   1112       /// \brief A marker record that indicates that we are at the end
   1113       /// of an expression.
   1114       STMT_STOP = 128,
   1115       /// \brief A NULL expression.
   1116       STMT_NULL_PTR,
   1117       /// \brief A reference to a previously [de]serialized Stmt record.
   1118       STMT_REF_PTR,
   1119       /// \brief A NullStmt record.
   1120       STMT_NULL,
   1121       /// \brief A CompoundStmt record.
   1122       STMT_COMPOUND,
   1123       /// \brief A CaseStmt record.
   1124       STMT_CASE,
   1125       /// \brief A DefaultStmt record.
   1126       STMT_DEFAULT,
   1127       /// \brief A LabelStmt record.
   1128       STMT_LABEL,
   1129       /// \brief An AttributedStmt record.
   1130       STMT_ATTRIBUTED,
   1131       /// \brief An IfStmt record.
   1132       STMT_IF,
   1133       /// \brief A SwitchStmt record.
   1134       STMT_SWITCH,
   1135       /// \brief A WhileStmt record.
   1136       STMT_WHILE,
   1137       /// \brief A DoStmt record.
   1138       STMT_DO,
   1139       /// \brief A ForStmt record.
   1140       STMT_FOR,
   1141       /// \brief A GotoStmt record.
   1142       STMT_GOTO,
   1143       /// \brief An IndirectGotoStmt record.
   1144       STMT_INDIRECT_GOTO,
   1145       /// \brief A ContinueStmt record.
   1146       STMT_CONTINUE,
   1147       /// \brief A BreakStmt record.
   1148       STMT_BREAK,
   1149       /// \brief A ReturnStmt record.
   1150       STMT_RETURN,
   1151       /// \brief A DeclStmt record.
   1152       STMT_DECL,
   1153       /// \brief A CapturedStmt record.
   1154       STMT_CAPTURED,
   1155       /// \brief A GCC-style AsmStmt record.
   1156       STMT_GCCASM,
   1157       /// \brief A MS-style AsmStmt record.
   1158       STMT_MSASM,
   1159       /// \brief A PredefinedExpr record.
   1160       EXPR_PREDEFINED,
   1161       /// \brief A DeclRefExpr record.
   1162       EXPR_DECL_REF,
   1163       /// \brief An IntegerLiteral record.
   1164       EXPR_INTEGER_LITERAL,
   1165       /// \brief A FloatingLiteral record.
   1166       EXPR_FLOATING_LITERAL,
   1167       /// \brief An ImaginaryLiteral record.
   1168       EXPR_IMAGINARY_LITERAL,
   1169       /// \brief A StringLiteral record.
   1170       EXPR_STRING_LITERAL,
   1171       /// \brief A CharacterLiteral record.
   1172       EXPR_CHARACTER_LITERAL,
   1173       /// \brief A ParenExpr record.
   1174       EXPR_PAREN,
   1175       /// \brief A ParenListExpr record.
   1176       EXPR_PAREN_LIST,
   1177       /// \brief A UnaryOperator record.
   1178       EXPR_UNARY_OPERATOR,
   1179       /// \brief An OffsetOfExpr record.
   1180       EXPR_OFFSETOF,
   1181       /// \brief A SizefAlignOfExpr record.
   1182       EXPR_SIZEOF_ALIGN_OF,
   1183       /// \brief An ArraySubscriptExpr record.
   1184       EXPR_ARRAY_SUBSCRIPT,
   1185       /// \brief A CallExpr record.
   1186       EXPR_CALL,
   1187       /// \brief A MemberExpr record.
   1188       EXPR_MEMBER,
   1189       /// \brief A BinaryOperator record.
   1190       EXPR_BINARY_OPERATOR,
   1191       /// \brief A CompoundAssignOperator record.
   1192       EXPR_COMPOUND_ASSIGN_OPERATOR,
   1193       /// \brief A ConditionOperator record.
   1194       EXPR_CONDITIONAL_OPERATOR,
   1195       /// \brief An ImplicitCastExpr record.
   1196       EXPR_IMPLICIT_CAST,
   1197       /// \brief A CStyleCastExpr record.
   1198       EXPR_CSTYLE_CAST,
   1199       /// \brief A CompoundLiteralExpr record.
   1200       EXPR_COMPOUND_LITERAL,
   1201       /// \brief An ExtVectorElementExpr record.
   1202       EXPR_EXT_VECTOR_ELEMENT,
   1203       /// \brief An InitListExpr record.
   1204       EXPR_INIT_LIST,
   1205       /// \brief A DesignatedInitExpr record.
   1206       EXPR_DESIGNATED_INIT,
   1207       /// \brief An ImplicitValueInitExpr record.
   1208       EXPR_IMPLICIT_VALUE_INIT,
   1209       /// \brief A VAArgExpr record.
   1210       EXPR_VA_ARG,
   1211       /// \brief An AddrLabelExpr record.
   1212       EXPR_ADDR_LABEL,
   1213       /// \brief A StmtExpr record.
   1214       EXPR_STMT,
   1215       /// \brief A ChooseExpr record.
   1216       EXPR_CHOOSE,
   1217       /// \brief A GNUNullExpr record.
   1218       EXPR_GNU_NULL,
   1219       /// \brief A ShuffleVectorExpr record.
   1220       EXPR_SHUFFLE_VECTOR,
   1221       /// \brief A ConvertVectorExpr record.
   1222       EXPR_CONVERT_VECTOR,
   1223       /// \brief BlockExpr
   1224       EXPR_BLOCK,
   1225       /// \brief A GenericSelectionExpr record.
   1226       EXPR_GENERIC_SELECTION,
   1227       /// \brief A PseudoObjectExpr record.
   1228       EXPR_PSEUDO_OBJECT,
   1229       /// \brief An AtomicExpr record.
   1230       EXPR_ATOMIC,
   1231 
   1232       // Objective-C
   1233 
   1234       /// \brief An ObjCStringLiteral record.
   1235       EXPR_OBJC_STRING_LITERAL,
   1236 
   1237       EXPR_OBJC_BOXED_EXPRESSION,
   1238       EXPR_OBJC_ARRAY_LITERAL,
   1239       EXPR_OBJC_DICTIONARY_LITERAL,
   1240 
   1241 
   1242       /// \brief An ObjCEncodeExpr record.
   1243       EXPR_OBJC_ENCODE,
   1244       /// \brief An ObjCSelectorExpr record.
   1245       EXPR_OBJC_SELECTOR_EXPR,
   1246       /// \brief An ObjCProtocolExpr record.
   1247       EXPR_OBJC_PROTOCOL_EXPR,
   1248       /// \brief An ObjCIvarRefExpr record.
   1249       EXPR_OBJC_IVAR_REF_EXPR,
   1250       /// \brief An ObjCPropertyRefExpr record.
   1251       EXPR_OBJC_PROPERTY_REF_EXPR,
   1252       /// \brief An ObjCSubscriptRefExpr record.
   1253       EXPR_OBJC_SUBSCRIPT_REF_EXPR,
   1254       /// \brief UNUSED
   1255       EXPR_OBJC_KVC_REF_EXPR,
   1256       /// \brief An ObjCMessageExpr record.
   1257       EXPR_OBJC_MESSAGE_EXPR,
   1258       /// \brief An ObjCIsa Expr record.
   1259       EXPR_OBJC_ISA,
   1260       /// \brief An ObjCIndirectCopyRestoreExpr record.
   1261       EXPR_OBJC_INDIRECT_COPY_RESTORE,
   1262 
   1263       /// \brief An ObjCForCollectionStmt record.
   1264       STMT_OBJC_FOR_COLLECTION,
   1265       /// \brief An ObjCAtCatchStmt record.
   1266       STMT_OBJC_CATCH,
   1267       /// \brief An ObjCAtFinallyStmt record.
   1268       STMT_OBJC_FINALLY,
   1269       /// \brief An ObjCAtTryStmt record.
   1270       STMT_OBJC_AT_TRY,
   1271       /// \brief An ObjCAtSynchronizedStmt record.
   1272       STMT_OBJC_AT_SYNCHRONIZED,
   1273       /// \brief An ObjCAtThrowStmt record.
   1274       STMT_OBJC_AT_THROW,
   1275       /// \brief An ObjCAutoreleasePoolStmt record.
   1276       STMT_OBJC_AUTORELEASE_POOL,
   1277       /// \brief A ObjCBoolLiteralExpr record.
   1278       EXPR_OBJC_BOOL_LITERAL,
   1279 
   1280       // C++
   1281 
   1282       /// \brief A CXXCatchStmt record.
   1283       STMT_CXX_CATCH,
   1284       /// \brief A CXXTryStmt record.
   1285       STMT_CXX_TRY,
   1286       /// \brief A CXXForRangeStmt record.
   1287       STMT_CXX_FOR_RANGE,
   1288 
   1289       /// \brief A CXXOperatorCallExpr record.
   1290       EXPR_CXX_OPERATOR_CALL,
   1291       /// \brief A CXXMemberCallExpr record.
   1292       EXPR_CXX_MEMBER_CALL,
   1293       /// \brief A CXXConstructExpr record.
   1294       EXPR_CXX_CONSTRUCT,
   1295       /// \brief A CXXTemporaryObjectExpr record.
   1296       EXPR_CXX_TEMPORARY_OBJECT,
   1297       /// \brief A CXXStaticCastExpr record.
   1298       EXPR_CXX_STATIC_CAST,
   1299       /// \brief A CXXDynamicCastExpr record.
   1300       EXPR_CXX_DYNAMIC_CAST,
   1301       /// \brief A CXXReinterpretCastExpr record.
   1302       EXPR_CXX_REINTERPRET_CAST,
   1303       /// \brief A CXXConstCastExpr record.
   1304       EXPR_CXX_CONST_CAST,
   1305       /// \brief A CXXFunctionalCastExpr record.
   1306       EXPR_CXX_FUNCTIONAL_CAST,
   1307       /// \brief A UserDefinedLiteral record.
   1308       EXPR_USER_DEFINED_LITERAL,
   1309       /// \brief A CXXStdInitializerListExpr record.
   1310       EXPR_CXX_STD_INITIALIZER_LIST,
   1311       /// \brief A CXXBoolLiteralExpr record.
   1312       EXPR_CXX_BOOL_LITERAL,
   1313       EXPR_CXX_NULL_PTR_LITERAL,  // CXXNullPtrLiteralExpr
   1314       EXPR_CXX_TYPEID_EXPR,       // CXXTypeidExpr (of expr).
   1315       EXPR_CXX_TYPEID_TYPE,       // CXXTypeidExpr (of type).
   1316       EXPR_CXX_THIS,              // CXXThisExpr
   1317       EXPR_CXX_THROW,             // CXXThrowExpr
   1318       EXPR_CXX_DEFAULT_ARG,       // CXXDefaultArgExpr
   1319       EXPR_CXX_DEFAULT_INIT,      // CXXDefaultInitExpr
   1320       EXPR_CXX_BIND_TEMPORARY,    // CXXBindTemporaryExpr
   1321 
   1322       EXPR_CXX_SCALAR_VALUE_INIT, // CXXScalarValueInitExpr
   1323       EXPR_CXX_NEW,               // CXXNewExpr
   1324       EXPR_CXX_DELETE,            // CXXDeleteExpr
   1325       EXPR_CXX_PSEUDO_DESTRUCTOR, // CXXPseudoDestructorExpr
   1326 
   1327       EXPR_EXPR_WITH_CLEANUPS,    // ExprWithCleanups
   1328 
   1329       EXPR_CXX_DEPENDENT_SCOPE_MEMBER,   // CXXDependentScopeMemberExpr
   1330       EXPR_CXX_DEPENDENT_SCOPE_DECL_REF, // DependentScopeDeclRefExpr
   1331       EXPR_CXX_UNRESOLVED_CONSTRUCT,     // CXXUnresolvedConstructExpr
   1332       EXPR_CXX_UNRESOLVED_MEMBER,        // UnresolvedMemberExpr
   1333       EXPR_CXX_UNRESOLVED_LOOKUP,        // UnresolvedLookupExpr
   1334 
   1335       EXPR_CXX_EXPRESSION_TRAIT,  // ExpressionTraitExpr
   1336       EXPR_CXX_NOEXCEPT,          // CXXNoexceptExpr
   1337 
   1338       EXPR_OPAQUE_VALUE,          // OpaqueValueExpr
   1339       EXPR_BINARY_CONDITIONAL_OPERATOR,  // BinaryConditionalOperator
   1340       EXPR_TYPE_TRAIT,            // TypeTraitExpr
   1341       EXPR_ARRAY_TYPE_TRAIT,      // ArrayTypeTraitIntExpr
   1342 
   1343       EXPR_PACK_EXPANSION,        // PackExpansionExpr
   1344       EXPR_SIZEOF_PACK,           // SizeOfPackExpr
   1345       EXPR_SUBST_NON_TYPE_TEMPLATE_PARM, // SubstNonTypeTemplateParmExpr
   1346       EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK,// SubstNonTypeTemplateParmPackExpr
   1347       EXPR_FUNCTION_PARM_PACK,    // FunctionParmPackExpr
   1348       EXPR_MATERIALIZE_TEMPORARY, // MaterializeTemporaryExpr
   1349       EXPR_CXX_FOLD,              // CXXFoldExpr
   1350 
   1351       // CUDA
   1352       EXPR_CUDA_KERNEL_CALL,       // CUDAKernelCallExpr
   1353 
   1354       // OpenCL
   1355       EXPR_ASTYPE,                 // AsTypeExpr
   1356 
   1357       // Microsoft
   1358       EXPR_CXX_PROPERTY_REF_EXPR, // MSPropertyRefExpr
   1359       EXPR_CXX_UUIDOF_EXPR,       // CXXUuidofExpr (of expr).
   1360       EXPR_CXX_UUIDOF_TYPE,       // CXXUuidofExpr (of type).
   1361       STMT_SEH_LEAVE,             // SEHLeaveStmt
   1362       STMT_SEH_EXCEPT,            // SEHExceptStmt
   1363       STMT_SEH_FINALLY,           // SEHFinallyStmt
   1364       STMT_SEH_TRY,               // SEHTryStmt
   1365 
   1366       // OpenMP directives
   1367       STMT_OMP_PARALLEL_DIRECTIVE,
   1368       STMT_OMP_SIMD_DIRECTIVE,
   1369       STMT_OMP_FOR_DIRECTIVE,
   1370       STMT_OMP_FOR_SIMD_DIRECTIVE,
   1371       STMT_OMP_SECTIONS_DIRECTIVE,
   1372       STMT_OMP_SECTION_DIRECTIVE,
   1373       STMT_OMP_SINGLE_DIRECTIVE,
   1374       STMT_OMP_MASTER_DIRECTIVE,
   1375       STMT_OMP_CRITICAL_DIRECTIVE,
   1376       STMT_OMP_PARALLEL_FOR_DIRECTIVE,
   1377       STMT_OMP_PARALLEL_FOR_SIMD_DIRECTIVE,
   1378       STMT_OMP_PARALLEL_SECTIONS_DIRECTIVE,
   1379       STMT_OMP_TASK_DIRECTIVE,
   1380       STMT_OMP_TASKYIELD_DIRECTIVE,
   1381       STMT_OMP_BARRIER_DIRECTIVE,
   1382       STMT_OMP_TASKWAIT_DIRECTIVE,
   1383       STMT_OMP_FLUSH_DIRECTIVE,
   1384       STMT_OMP_ORDERED_DIRECTIVE,
   1385       STMT_OMP_ATOMIC_DIRECTIVE,
   1386       STMT_OMP_TARGET_DIRECTIVE,
   1387       STMT_OMP_TEAMS_DIRECTIVE,
   1388 
   1389       // ARC
   1390       EXPR_OBJC_BRIDGED_CAST,     // ObjCBridgedCastExpr
   1391 
   1392       STMT_MS_DEPENDENT_EXISTS,   // MSDependentExistsStmt
   1393       EXPR_LAMBDA                 // LambdaExpr
   1394     };
   1395 
   1396     /// \brief The kinds of designators that can occur in a
   1397     /// DesignatedInitExpr.
   1398     enum DesignatorTypes {
   1399       /// \brief Field designator where only the field name is known.
   1400       DESIG_FIELD_NAME  = 0,
   1401       /// \brief Field designator where the field has been resolved to
   1402       /// a declaration.
   1403       DESIG_FIELD_DECL  = 1,
   1404       /// \brief Array designator.
   1405       DESIG_ARRAY       = 2,
   1406       /// \brief GNU array range designator.
   1407       DESIG_ARRAY_RANGE = 3
   1408     };
   1409 
   1410     /// \brief The different kinds of data that can occur in a
   1411     /// CtorInitializer.
   1412     enum CtorInitializerType {
   1413       CTOR_INITIALIZER_BASE,
   1414       CTOR_INITIALIZER_DELEGATING,
   1415       CTOR_INITIALIZER_MEMBER,
   1416       CTOR_INITIALIZER_INDIRECT_MEMBER
   1417     };
   1418 
   1419     /// \brief Describes the redeclarations of a declaration.
   1420     struct LocalRedeclarationsInfo {
   1421       DeclID FirstID;      // The ID of the first declaration
   1422       unsigned Offset;     // Offset into the array of redeclaration chains.
   1423 
   1424       friend bool operator<(const LocalRedeclarationsInfo &X,
   1425                             const LocalRedeclarationsInfo &Y) {
   1426         return X.FirstID < Y.FirstID;
   1427       }
   1428 
   1429       friend bool operator>(const LocalRedeclarationsInfo &X,
   1430                             const LocalRedeclarationsInfo &Y) {
   1431         return X.FirstID > Y.FirstID;
   1432       }
   1433 
   1434       friend bool operator<=(const LocalRedeclarationsInfo &X,
   1435                              const LocalRedeclarationsInfo &Y) {
   1436         return X.FirstID <= Y.FirstID;
   1437       }
   1438 
   1439       friend bool operator>=(const LocalRedeclarationsInfo &X,
   1440                              const LocalRedeclarationsInfo &Y) {
   1441         return X.FirstID >= Y.FirstID;
   1442       }
   1443     };
   1444 
   1445     /// \brief Describes the categories of an Objective-C class.
   1446     struct ObjCCategoriesInfo {
   1447       DeclID DefinitionID; // The ID of the definition
   1448       unsigned Offset;     // Offset into the array of category lists.
   1449 
   1450       friend bool operator<(const ObjCCategoriesInfo &X,
   1451                             const ObjCCategoriesInfo &Y) {
   1452         return X.DefinitionID < Y.DefinitionID;
   1453       }
   1454 
   1455       friend bool operator>(const ObjCCategoriesInfo &X,
   1456                             const ObjCCategoriesInfo &Y) {
   1457         return X.DefinitionID > Y.DefinitionID;
   1458       }
   1459 
   1460       friend bool operator<=(const ObjCCategoriesInfo &X,
   1461                              const ObjCCategoriesInfo &Y) {
   1462         return X.DefinitionID <= Y.DefinitionID;
   1463       }
   1464 
   1465       friend bool operator>=(const ObjCCategoriesInfo &X,
   1466                              const ObjCCategoriesInfo &Y) {
   1467         return X.DefinitionID >= Y.DefinitionID;
   1468       }
   1469     };
   1470 
   1471     /// @}
   1472   }
   1473 } // end namespace clang
   1474 
   1475 #endif
   1476