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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_SERIALIZATION_ASTBITCODES_H
18 #define LLVM_CLANG_SERIALIZATION_ASTBITCODES_H
19 
20 #include "clang/AST/DeclarationName.h"
21 #include "clang/AST/Type.h"
22 #include "llvm/ADT/DenseMap.h"
23 #include "llvm/Bitcode/BitCodes.h"
24 #include "llvm/Support/DataTypes.h"
25 
26 namespace clang {
27   namespace serialization {
28     /// \brief AST file major version number supported by this version of
29     /// Clang.
30     ///
31     /// Whenever the AST file format changes in a way that makes it
32     /// incompatible with previous versions (such that a reader
33     /// designed for the previous version could not support reading
34     /// the new version), this number should be increased.
35     ///
36     /// Version 4 of AST files also requires that the version control branch and
37     /// revision match exactly, since there is no backward compatibility of
38     /// AST files at this time.
39     const unsigned VERSION_MAJOR = 6;
40 
41     /// \brief AST file minor version number supported by this version of
42     /// Clang.
43     ///
44     /// Whenever the AST format changes in a way that is still
45     /// compatible with previous versions (such that a reader designed
46     /// for the previous version could still support reading the new
47     /// version by ignoring new kinds of subblocks), this number
48     /// should be increased.
49     const unsigned VERSION_MINOR = 0;
50 
51     /// \brief An ID number that refers to an identifier in an AST file.
52     ///
53     /// The ID numbers of identifiers are consecutive (in order of discovery)
54     /// and start at 1. 0 is reserved for NULL.
55     typedef uint32_t IdentifierID;
56 
57     /// \brief An ID number that refers to a declaration in an AST file.
58     ///
59     /// The ID numbers of declarations are consecutive (in order of
60     /// discovery), with values below NUM_PREDEF_DECL_IDS being reserved.
61     /// At the start of a chain of precompiled headers, declaration ID 1 is
62     /// used for the translation unit declaration.
63     typedef uint32_t DeclID;
64 
65     // FIXME: Turn these into classes so we can have some type safety when
66     // we go from local ID to global and vice-versa.
67     typedef DeclID LocalDeclID;
68     typedef DeclID GlobalDeclID;
69 
70     /// \brief An ID number that refers to a type in an AST file.
71     ///
72     /// The ID of a type is partitioned into two parts: the lower
73     /// three bits are used to store the const/volatile/restrict
74     /// qualifiers (as with QualType) and the upper bits provide a
75     /// type index. The type index values are partitioned into two
76     /// sets. The values below NUM_PREDEF_TYPE_IDs are predefined type
77     /// IDs (based on the PREDEF_TYPE_*_ID constants), with 0 as a
78     /// placeholder for "no type". Values from NUM_PREDEF_TYPE_IDs are
79     /// other types that have serialized representations.
80     typedef uint32_t TypeID;
81 
82     /// \brief A type index; the type ID with the qualifier bits removed.
83     class TypeIdx {
84       uint32_t Idx;
85     public:
TypeIdx()86       TypeIdx() : Idx(0) { }
TypeIdx(uint32_t index)87       explicit TypeIdx(uint32_t index) : Idx(index) { }
88 
getIndex()89       uint32_t getIndex() const { return Idx; }
asTypeID(unsigned FastQuals)90       TypeID asTypeID(unsigned FastQuals) const {
91         if (Idx == uint32_t(-1))
92           return TypeID(-1);
93 
94         return (Idx << Qualifiers::FastWidth) | FastQuals;
95       }
fromTypeID(TypeID ID)96       static TypeIdx fromTypeID(TypeID ID) {
97         if (ID == TypeID(-1))
98           return TypeIdx(-1);
99 
100         return TypeIdx(ID >> Qualifiers::FastWidth);
101       }
102     };
103 
104     /// A structure for putting "fast"-unqualified QualTypes into a
105     /// DenseMap.  This uses the standard pointer hash function.
106     struct UnsafeQualTypeDenseMapInfo {
isEqualUnsafeQualTypeDenseMapInfo107       static inline bool isEqual(QualType A, QualType B) { return A == B; }
getEmptyKeyUnsafeQualTypeDenseMapInfo108       static inline QualType getEmptyKey() {
109         return QualType::getFromOpaquePtr((void*) 1);
110       }
getTombstoneKeyUnsafeQualTypeDenseMapInfo111       static inline QualType getTombstoneKey() {
112         return QualType::getFromOpaquePtr((void*) 2);
113       }
getHashValueUnsafeQualTypeDenseMapInfo114       static inline unsigned getHashValue(QualType T) {
115         assert(!T.getLocalFastQualifiers() &&
116                "hash invalid for types with fast quals");
117         uintptr_t v = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
118         return (unsigned(v) >> 4) ^ (unsigned(v) >> 9);
119       }
120     };
121 
122     /// \brief An ID number that refers to an identifier in an AST file.
123     typedef uint32_t IdentID;
124 
125     /// \brief The number of predefined identifier IDs.
126     const unsigned int NUM_PREDEF_IDENT_IDS = 1;
127 
128     /// \brief An ID number that refers to a macro in an AST file.
129     typedef uint32_t MacroID;
130 
131     /// \brief A global ID number that refers to a macro in an AST file.
132     typedef uint32_t GlobalMacroID;
133 
134     /// \brief A local to a module ID number that refers to a macro in an
135     /// AST file.
136     typedef uint32_t LocalMacroID;
137 
138     /// \brief The number of predefined macro IDs.
139     const unsigned int NUM_PREDEF_MACRO_IDS = 1;
140 
141     /// \brief An ID number that refers to an ObjC selector in an AST file.
142     typedef uint32_t SelectorID;
143 
144     /// \brief The number of predefined selector IDs.
145     const unsigned int NUM_PREDEF_SELECTOR_IDS = 1;
146 
147     /// \brief An ID number that refers to a set of CXXBaseSpecifiers in an
148     /// AST file.
149     typedef uint32_t CXXBaseSpecifiersID;
150 
151     /// \brief An ID number that refers to a list of CXXCtorInitializers in an
152     /// AST file.
153     typedef uint32_t CXXCtorInitializersID;
154 
155     /// \brief An ID number that refers to an entity in the detailed
156     /// preprocessing record.
157     typedef uint32_t PreprocessedEntityID;
158 
159     /// \brief An ID number that refers to a submodule in a module file.
160     typedef uint32_t SubmoduleID;
161 
162     /// \brief The number of predefined submodule IDs.
163     const unsigned int NUM_PREDEF_SUBMODULE_IDS = 1;
164 
165     /// \brief Source range/offset of a preprocessed entity.
166     struct PPEntityOffset {
167       /// \brief Raw source location of beginning of range.
168       unsigned Begin;
169       /// \brief Raw source location of end of range.
170       unsigned End;
171       /// \brief Offset in the AST file.
172       uint32_t BitOffset;
173 
PPEntityOffsetPPEntityOffset174       PPEntityOffset(SourceRange R, uint32_t BitOffset)
175         : Begin(R.getBegin().getRawEncoding()),
176           End(R.getEnd().getRawEncoding()),
177           BitOffset(BitOffset) { }
getBeginPPEntityOffset178       SourceLocation getBegin() const {
179         return SourceLocation::getFromRawEncoding(Begin);
180       }
getEndPPEntityOffset181       SourceLocation getEnd() const {
182         return SourceLocation::getFromRawEncoding(End);
183       }
184     };
185 
186     /// \brief Source range/offset of a preprocessed entity.
187     struct DeclOffset {
188       /// \brief Raw source location.
189       unsigned Loc;
190       /// \brief Offset in the AST file.
191       uint32_t BitOffset;
192 
DeclOffsetDeclOffset193       DeclOffset() : Loc(0), BitOffset(0) { }
DeclOffsetDeclOffset194       DeclOffset(SourceLocation Loc, uint32_t BitOffset)
195         : Loc(Loc.getRawEncoding()),
196           BitOffset(BitOffset) { }
setLocationDeclOffset197       void setLocation(SourceLocation L) {
198         Loc = L.getRawEncoding();
199       }
getLocationDeclOffset200       SourceLocation getLocation() const {
201         return SourceLocation::getFromRawEncoding(Loc);
202       }
203     };
204 
205     /// \brief The number of predefined preprocessed entity IDs.
206     const unsigned int NUM_PREDEF_PP_ENTITY_IDS = 1;
207 
208     /// \brief Describes the various kinds of blocks that occur within
209     /// an AST file.
210     enum BlockIDs {
211       /// \brief The AST block, which acts as a container around the
212       /// full AST block.
213       AST_BLOCK_ID = llvm::bitc::FIRST_APPLICATION_BLOCKID,
214 
215       /// \brief The block containing information about the source
216       /// manager.
217       SOURCE_MANAGER_BLOCK_ID,
218 
219       /// \brief The block containing information about the
220       /// preprocessor.
221       PREPROCESSOR_BLOCK_ID,
222 
223       /// \brief The block containing the definitions of all of the
224       /// types and decls used within the AST file.
225       DECLTYPES_BLOCK_ID,
226 
227       /// \brief The block containing the detailed preprocessing record.
228       PREPROCESSOR_DETAIL_BLOCK_ID,
229 
230       /// \brief The block containing the submodule structure.
231       SUBMODULE_BLOCK_ID,
232 
233       /// \brief The block containing comments.
234       COMMENTS_BLOCK_ID,
235 
236       /// \brief The control block, which contains all of the
237       /// information that needs to be validated prior to committing
238       /// to loading the AST file.
239       CONTROL_BLOCK_ID,
240 
241       /// \brief The block of input files, which were used as inputs
242       /// to create this AST file.
243       ///
244       /// This block is part of the control block.
245       INPUT_FILES_BLOCK_ID,
246 
247       /// \brief The block of configuration options, used to check that
248       /// a module is being used in a configuration compatible with the
249       /// configuration in which it was built.
250       ///
251       /// This block is part of the control block.
252       OPTIONS_BLOCK_ID,
253 
254       /// \brief A block containing a module file extension.
255       EXTENSION_BLOCK_ID,
256     };
257 
258     /// \brief Record types that occur within the control block.
259     enum ControlRecordTypes {
260       /// \brief AST file metadata, including the AST file version number
261       /// and information about the compiler used to build this AST file.
262       METADATA = 1,
263 
264       /// \brief Record code for the list of other AST files imported by
265       /// this AST file.
266       IMPORTS,
267 
268       /// \brief Record code for the original file that was used to
269       /// generate the AST file, including both its file ID and its
270       /// name.
271       ORIGINAL_FILE,
272 
273       /// \brief The directory that the PCH was originally created in.
274       ORIGINAL_PCH_DIR,
275 
276       /// \brief Record code for file ID of the file or buffer that was used to
277       /// generate the AST file.
278       ORIGINAL_FILE_ID,
279 
280       /// \brief Offsets into the input-files block where input files
281       /// reside.
282       INPUT_FILE_OFFSETS,
283 
284       /// \brief Record code for the module name.
285       MODULE_NAME,
286 
287       /// \brief Record code for the module map file that was used to build this
288       /// AST file.
289       MODULE_MAP_FILE,
290 
291       /// \brief Record code for the signature that identifiers this AST file.
292       SIGNATURE,
293 
294       /// \brief Record code for the module build directory.
295       MODULE_DIRECTORY,
296     };
297 
298     /// \brief Record types that occur within the options block inside
299     /// the control block.
300     enum OptionsRecordTypes {
301       /// \brief Record code for the language options table.
302       ///
303       /// The record with this code contains the contents of the
304       /// LangOptions structure. We serialize the entire contents of
305       /// the structure, and let the reader decide which options are
306       /// actually important to check.
307       LANGUAGE_OPTIONS = 1,
308 
309       /// \brief Record code for the target options table.
310       TARGET_OPTIONS,
311 
312       /// \brief Record code for the diagnostic options table.
313       DIAGNOSTIC_OPTIONS,
314 
315       /// \brief Record code for the filesystem options table.
316       FILE_SYSTEM_OPTIONS,
317 
318       /// \brief Record code for the headers search options table.
319       HEADER_SEARCH_OPTIONS,
320 
321       /// \brief Record code for the preprocessor options table.
322       PREPROCESSOR_OPTIONS,
323     };
324 
325     /// \brief Record code for extension blocks.
326     enum ExtensionBlockRecordTypes {
327       /// Metadata describing this particular extension.
328       EXTENSION_METADATA = 1,
329 
330       /// The first record ID allocated to the extensions themselves.
331       FIRST_EXTENSION_RECORD_ID = 4
332     };
333 
334     /// \brief Record types that occur within the input-files block
335     /// inside the control block.
336     enum InputFileRecordTypes {
337       /// \brief An input file.
338       INPUT_FILE = 1
339     };
340 
341     /// \brief Record types that occur within the AST block itself.
342     enum ASTRecordTypes {
343       /// \brief Record code for the offsets of each type.
344       ///
345       /// The TYPE_OFFSET constant describes the record that occurs
346       /// within the AST block. The record itself is an array of offsets that
347       /// point into the declarations and types block (identified by
348       /// DECLTYPES_BLOCK_ID). The index into the array is based on the ID
349       /// of a type. For a given type ID @c T, the lower three bits of
350       /// @c T are its qualifiers (const, volatile, restrict), as in
351       /// the QualType class. The upper bits, after being shifted and
352       /// subtracting NUM_PREDEF_TYPE_IDS, are used to index into the
353       /// TYPE_OFFSET block to determine the offset of that type's
354       /// corresponding record within the DECLTYPES_BLOCK_ID block.
355       TYPE_OFFSET = 1,
356 
357       /// \brief Record code for the offsets of each decl.
358       ///
359       /// The DECL_OFFSET constant describes the record that occurs
360       /// within the block identified by DECL_OFFSETS_BLOCK_ID within
361       /// the AST block. The record itself is an array of offsets that
362       /// point into the declarations and types block (identified by
363       /// DECLTYPES_BLOCK_ID). The declaration ID is an index into this
364       /// record, after subtracting one to account for the use of
365       /// declaration ID 0 for a NULL declaration pointer. Index 0 is
366       /// reserved for the translation unit declaration.
367       DECL_OFFSET = 2,
368 
369       /// \brief Record code for the table of offsets of each
370       /// identifier ID.
371       ///
372       /// The offset table contains offsets into the blob stored in
373       /// the IDENTIFIER_TABLE record. Each offset points to the
374       /// NULL-terminated string that corresponds to that identifier.
375       IDENTIFIER_OFFSET = 3,
376 
377       /// \brief This is so that older clang versions, before the introduction
378       /// of the control block, can read and reject the newer PCH format.
379       /// *DON'T CHANGE THIS NUMBER*.
380       METADATA_OLD_FORMAT = 4,
381 
382       /// \brief Record code for the identifier table.
383       ///
384       /// The identifier table is a simple blob that contains
385       /// NULL-terminated strings for all of the identifiers
386       /// referenced by the AST file. The IDENTIFIER_OFFSET table
387       /// contains the mapping from identifier IDs to the characters
388       /// in this blob. Note that the starting offsets of all of the
389       /// identifiers are odd, so that, when the identifier offset
390       /// table is loaded in, we can use the low bit to distinguish
391       /// between offsets (for unresolved identifier IDs) and
392       /// IdentifierInfo pointers (for already-resolved identifier
393       /// IDs).
394       IDENTIFIER_TABLE = 5,
395 
396       /// \brief Record code for the array of eagerly deserialized decls.
397       ///
398       /// The AST file contains a list of all of the declarations that should be
399       /// eagerly deserialized present within the parsed headers, stored as an
400       /// array of declaration IDs. These declarations will be
401       /// reported to the AST consumer after the AST file has been
402       /// read, since their presence can affect the semantics of the
403       /// program (e.g., for code generation).
404       EAGERLY_DESERIALIZED_DECLS = 6,
405 
406       /// \brief Record code for the set of non-builtin, special
407       /// types.
408       ///
409       /// This record contains the type IDs for the various type nodes
410       /// that are constructed during semantic analysis (e.g.,
411       /// __builtin_va_list). The SPECIAL_TYPE_* constants provide
412       /// offsets into this record.
413       SPECIAL_TYPES = 7,
414 
415       /// \brief Record code for the extra statistics we gather while
416       /// generating an AST file.
417       STATISTICS = 8,
418 
419       /// \brief Record code for the array of tentative definitions.
420       TENTATIVE_DEFINITIONS = 9,
421 
422       // ID 10 used to be for a list of extern "C" declarations.
423 
424       /// \brief Record code for the table of offsets into the
425       /// Objective-C method pool.
426       SELECTOR_OFFSETS = 11,
427 
428       /// \brief Record code for the Objective-C method pool,
429       METHOD_POOL = 12,
430 
431       /// \brief The value of the next __COUNTER__ to dispense.
432       /// [PP_COUNTER_VALUE, Val]
433       PP_COUNTER_VALUE = 13,
434 
435       /// \brief Record code for the table of offsets into the block
436       /// of source-location information.
437       SOURCE_LOCATION_OFFSETS = 14,
438 
439       /// \brief Record code for the set of source location entries
440       /// that need to be preloaded by the AST reader.
441       ///
442       /// This set contains the source location entry for the
443       /// predefines buffer and for any file entries that need to be
444       /// preloaded.
445       SOURCE_LOCATION_PRELOADS = 15,
446 
447       /// \brief Record code for the set of ext_vector type names.
448       EXT_VECTOR_DECLS = 16,
449 
450       /// \brief Record code for the array of unused file scoped decls.
451       UNUSED_FILESCOPED_DECLS = 17,
452 
453       /// \brief Record code for the table of offsets to entries in the
454       /// preprocessing record.
455       PPD_ENTITIES_OFFSETS = 18,
456 
457       /// \brief Record code for the array of VTable uses.
458       VTABLE_USES = 19,
459 
460       // ID 20 used to be for a list of dynamic classes.
461 
462       /// \brief Record code for referenced selector pool.
463       REFERENCED_SELECTOR_POOL = 21,
464 
465       /// \brief Record code for an update to the TU's lexically contained
466       /// declarations.
467       TU_UPDATE_LEXICAL = 22,
468 
469       // ID 23 used to be for a list of local redeclarations.
470 
471       /// \brief Record code for declarations that Sema keeps references of.
472       SEMA_DECL_REFS = 24,
473 
474       /// \brief Record code for weak undeclared identifiers.
475       WEAK_UNDECLARED_IDENTIFIERS = 25,
476 
477       /// \brief Record code for pending implicit instantiations.
478       PENDING_IMPLICIT_INSTANTIATIONS = 26,
479 
480       // ID 27 used to be for a list of replacement decls.
481 
482       /// \brief Record code for an update to a decl context's lookup table.
483       ///
484       /// In practice, this should only be used for the TU and namespaces.
485       UPDATE_VISIBLE = 28,
486 
487       /// \brief Record for offsets of DECL_UPDATES records for declarations
488       /// that were modified after being deserialized and need updates.
489       DECL_UPDATE_OFFSETS = 29,
490 
491       // ID 30 used to be a decl update record. These are now in the DECLTYPES
492       // block.
493 
494       // ID 31 used to be a list of offsets to DECL_CXX_BASE_SPECIFIERS records.
495 
496       /// \brief Record code for \#pragma diagnostic mappings.
497       DIAG_PRAGMA_MAPPINGS = 32,
498 
499       /// \brief Record code for special CUDA declarations.
500       CUDA_SPECIAL_DECL_REFS = 33,
501 
502       /// \brief Record code for header search information.
503       HEADER_SEARCH_TABLE = 34,
504 
505       /// \brief Record code for floating point \#pragma options.
506       FP_PRAGMA_OPTIONS = 35,
507 
508       /// \brief Record code for enabled OpenCL extensions.
509       OPENCL_EXTENSIONS = 36,
510 
511       /// \brief The list of delegating constructor declarations.
512       DELEGATING_CTORS = 37,
513 
514       /// \brief Record code for the set of known namespaces, which are used
515       /// for typo correction.
516       KNOWN_NAMESPACES = 38,
517 
518       /// \brief Record code for the remapping information used to relate
519       /// loaded modules to the various offsets and IDs(e.g., source location
520       /// offests, declaration and type IDs) that are used in that module to
521       /// refer to other modules.
522       MODULE_OFFSET_MAP = 39,
523 
524       /// \brief Record code for the source manager line table information,
525       /// which stores information about \#line directives.
526       SOURCE_MANAGER_LINE_TABLE = 40,
527 
528       /// \brief Record code for map of Objective-C class definition IDs to the
529       /// ObjC categories in a module that are attached to that class.
530       OBJC_CATEGORIES_MAP = 41,
531 
532       /// \brief Record code for a file sorted array of DeclIDs in a module.
533       FILE_SORTED_DECLS = 42,
534 
535       /// \brief Record code for an array of all of the (sub)modules that were
536       /// imported by the AST file.
537       IMPORTED_MODULES = 43,
538 
539       // ID 44 used to be a table of merged canonical declarations.
540       // ID 45 used to be a list of declaration IDs of local redeclarations.
541 
542       /// \brief Record code for the array of Objective-C categories (including
543       /// extensions).
544       ///
545       /// This array can only be interpreted properly using the Objective-C
546       /// categories map.
547       OBJC_CATEGORIES = 46,
548 
549       /// \brief Record code for the table of offsets of each macro ID.
550       ///
551       /// The offset table contains offsets into the blob stored in
552       /// the preprocessor block. Each offset points to the corresponding
553       /// macro definition.
554       MACRO_OFFSET = 47,
555 
556       /// \brief A list of "interesting" identifiers. Only used in C++ (where we
557       /// don't normally do lookups into the serialized identifier table). These
558       /// are eagerly deserialized.
559       INTERESTING_IDENTIFIERS = 48,
560 
561       /// \brief Record code for undefined but used functions and variables that
562       /// need a definition in this TU.
563       UNDEFINED_BUT_USED = 49,
564 
565       /// \brief Record code for late parsed template functions.
566       LATE_PARSED_TEMPLATE = 50,
567 
568       /// \brief Record code for \#pragma optimize options.
569       OPTIMIZE_PRAGMA_OPTIONS = 51,
570 
571       /// \brief Record code for potentially unused local typedef names.
572       UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES = 52,
573 
574       // ID 53 used to be a table of constructor initializer records.
575 
576       /// \brief Delete expressions that will be analyzed later.
577       DELETE_EXPRS_TO_ANALYZE = 54,
578 
579       /// \brief Record code for \#pragma ms_struct options.
580       MSSTRUCT_PRAGMA_OPTIONS = 55,
581 
582       /// \brief Record code for \#pragma ms_struct options.
583       POINTERS_TO_MEMBERS_PRAGMA_OPTIONS = 56
584     };
585 
586     /// \brief Record types used within a source manager block.
587     enum SourceManagerRecordTypes {
588       /// \brief Describes a source location entry (SLocEntry) for a
589       /// file.
590       SM_SLOC_FILE_ENTRY = 1,
591       /// \brief Describes a source location entry (SLocEntry) for a
592       /// buffer.
593       SM_SLOC_BUFFER_ENTRY = 2,
594       /// \brief Describes a blob that contains the data for a buffer
595       /// entry. This kind of record always directly follows a
596       /// SM_SLOC_BUFFER_ENTRY record or a SM_SLOC_FILE_ENTRY with an
597       /// overridden buffer.
598       SM_SLOC_BUFFER_BLOB = 3,
599       /// \brief Describes a zlib-compressed blob that contains the data for
600       /// a buffer entry.
601       SM_SLOC_BUFFER_BLOB_COMPRESSED = 4,
602       /// \brief Describes a source location entry (SLocEntry) for a
603       /// macro expansion.
604       SM_SLOC_EXPANSION_ENTRY = 5
605     };
606 
607     /// \brief Record types used within a preprocessor block.
608     enum PreprocessorRecordTypes {
609       // The macros in the PP section are a PP_MACRO_* instance followed by a
610       // list of PP_TOKEN instances for each token in the definition.
611 
612       /// \brief An object-like macro definition.
613       /// [PP_MACRO_OBJECT_LIKE, IdentInfoID, SLoc, IsUsed]
614       PP_MACRO_OBJECT_LIKE = 1,
615 
616       /// \brief A function-like macro definition.
617       /// [PP_MACRO_FUNCTION_LIKE, \<ObjectLikeStuff>, IsC99Varargs,
618       /// IsGNUVarars, NumArgs, ArgIdentInfoID* ]
619       PP_MACRO_FUNCTION_LIKE = 2,
620 
621       /// \brief Describes one token.
622       /// [PP_TOKEN, SLoc, Length, IdentInfoID, Kind, Flags]
623       PP_TOKEN = 3,
624 
625       /// \brief The macro directives history for a particular identifier.
626       PP_MACRO_DIRECTIVE_HISTORY = 4,
627 
628       /// \brief A macro directive exported by a module.
629       /// [PP_MODULE_MACRO, SubmoduleID, MacroID, (Overridden SubmoduleID)*]
630       PP_MODULE_MACRO = 5,
631     };
632 
633     /// \brief Record types used within a preprocessor detail block.
634     enum PreprocessorDetailRecordTypes {
635       /// \brief Describes a macro expansion within the preprocessing record.
636       PPD_MACRO_EXPANSION = 0,
637 
638       /// \brief Describes a macro definition within the preprocessing record.
639       PPD_MACRO_DEFINITION = 1,
640 
641       /// \brief Describes an inclusion directive within the preprocessing
642       /// record.
643       PPD_INCLUSION_DIRECTIVE = 2
644     };
645 
646     /// \brief Record types used within a submodule description block.
647     enum SubmoduleRecordTypes {
648       /// \brief Metadata for submodules as a whole.
649       SUBMODULE_METADATA = 0,
650       /// \brief Defines the major attributes of a submodule, including its
651       /// name and parent.
652       SUBMODULE_DEFINITION = 1,
653       /// \brief Specifies the umbrella header used to create this module,
654       /// if any.
655       SUBMODULE_UMBRELLA_HEADER = 2,
656       /// \brief Specifies a header that falls into this (sub)module.
657       SUBMODULE_HEADER = 3,
658       /// \brief Specifies a top-level header that falls into this (sub)module.
659       SUBMODULE_TOPHEADER = 4,
660       /// \brief Specifies an umbrella directory.
661       SUBMODULE_UMBRELLA_DIR = 5,
662       /// \brief Specifies the submodules that are imported by this
663       /// submodule.
664       SUBMODULE_IMPORTS = 6,
665       /// \brief Specifies the submodules that are re-exported from this
666       /// submodule.
667       SUBMODULE_EXPORTS = 7,
668       /// \brief Specifies a required feature.
669       SUBMODULE_REQUIRES = 8,
670       /// \brief Specifies a header that has been explicitly excluded
671       /// from this submodule.
672       SUBMODULE_EXCLUDED_HEADER = 9,
673       /// \brief Specifies a library or framework to link against.
674       SUBMODULE_LINK_LIBRARY = 10,
675       /// \brief Specifies a configuration macro for this module.
676       SUBMODULE_CONFIG_MACRO = 11,
677       /// \brief Specifies a conflict with another module.
678       SUBMODULE_CONFLICT = 12,
679       /// \brief Specifies a header that is private to this submodule.
680       SUBMODULE_PRIVATE_HEADER = 13,
681       /// \brief Specifies a header that is part of the module but must be
682       /// textually included.
683       SUBMODULE_TEXTUAL_HEADER = 14,
684       /// \brief Specifies a header that is private to this submodule but
685       /// must be textually included.
686       SUBMODULE_PRIVATE_TEXTUAL_HEADER = 15,
687     };
688 
689     /// \brief Record types used within a comments block.
690     enum CommentRecordTypes {
691       COMMENTS_RAW_COMMENT = 0
692     };
693 
694     /// \defgroup ASTAST AST file AST constants
695     ///
696     /// The constants in this group describe various components of the
697     /// abstract syntax tree within an AST file.
698     ///
699     /// @{
700 
701     /// \brief Predefined type IDs.
702     ///
703     /// These type IDs correspond to predefined types in the AST
704     /// context, such as built-in types (int) and special place-holder
705     /// types (the \<overload> and \<dependent> type markers). Such
706     /// types are never actually serialized, since they will be built
707     /// by the AST context when it is created.
708     enum PredefinedTypeIDs {
709       /// \brief The NULL type.
710       PREDEF_TYPE_NULL_ID       = 0,
711       /// \brief The void type.
712       PREDEF_TYPE_VOID_ID       = 1,
713       /// \brief The 'bool' or '_Bool' type.
714       PREDEF_TYPE_BOOL_ID       = 2,
715       /// \brief The 'char' type, when it is unsigned.
716       PREDEF_TYPE_CHAR_U_ID     = 3,
717       /// \brief The 'unsigned char' type.
718       PREDEF_TYPE_UCHAR_ID      = 4,
719       /// \brief The 'unsigned short' type.
720       PREDEF_TYPE_USHORT_ID     = 5,
721       /// \brief The 'unsigned int' type.
722       PREDEF_TYPE_UINT_ID       = 6,
723       /// \brief The 'unsigned long' type.
724       PREDEF_TYPE_ULONG_ID      = 7,
725       /// \brief The 'unsigned long long' type.
726       PREDEF_TYPE_ULONGLONG_ID  = 8,
727       /// \brief The 'char' type, when it is signed.
728       PREDEF_TYPE_CHAR_S_ID     = 9,
729       /// \brief The 'signed char' type.
730       PREDEF_TYPE_SCHAR_ID      = 10,
731       /// \brief The C++ 'wchar_t' type.
732       PREDEF_TYPE_WCHAR_ID      = 11,
733       /// \brief The (signed) 'short' type.
734       PREDEF_TYPE_SHORT_ID      = 12,
735       /// \brief The (signed) 'int' type.
736       PREDEF_TYPE_INT_ID        = 13,
737       /// \brief The (signed) 'long' type.
738       PREDEF_TYPE_LONG_ID       = 14,
739       /// \brief The (signed) 'long long' type.
740       PREDEF_TYPE_LONGLONG_ID   = 15,
741       /// \brief The 'float' type.
742       PREDEF_TYPE_FLOAT_ID      = 16,
743       /// \brief The 'double' type.
744       PREDEF_TYPE_DOUBLE_ID     = 17,
745       /// \brief The 'long double' type.
746       PREDEF_TYPE_LONGDOUBLE_ID = 18,
747       /// \brief The placeholder type for overloaded function sets.
748       PREDEF_TYPE_OVERLOAD_ID   = 19,
749       /// \brief The placeholder type for dependent types.
750       PREDEF_TYPE_DEPENDENT_ID  = 20,
751       /// \brief The '__uint128_t' type.
752       PREDEF_TYPE_UINT128_ID    = 21,
753       /// \brief The '__int128_t' type.
754       PREDEF_TYPE_INT128_ID     = 22,
755       /// \brief The type of 'nullptr'.
756       PREDEF_TYPE_NULLPTR_ID    = 23,
757       /// \brief The C++ 'char16_t' type.
758       PREDEF_TYPE_CHAR16_ID     = 24,
759       /// \brief The C++ 'char32_t' type.
760       PREDEF_TYPE_CHAR32_ID     = 25,
761       /// \brief The ObjC 'id' type.
762       PREDEF_TYPE_OBJC_ID       = 26,
763       /// \brief The ObjC 'Class' type.
764       PREDEF_TYPE_OBJC_CLASS    = 27,
765       /// \brief The ObjC 'SEL' type.
766       PREDEF_TYPE_OBJC_SEL      = 28,
767       /// \brief The 'unknown any' placeholder type.
768       PREDEF_TYPE_UNKNOWN_ANY   = 29,
769       /// \brief The placeholder type for bound member functions.
770       PREDEF_TYPE_BOUND_MEMBER  = 30,
771       /// \brief The "auto" deduction type.
772       PREDEF_TYPE_AUTO_DEDUCT   = 31,
773       /// \brief The "auto &&" deduction type.
774       PREDEF_TYPE_AUTO_RREF_DEDUCT = 32,
775       /// \brief The OpenCL 'half' / ARM NEON __fp16 type.
776       PREDEF_TYPE_HALF_ID       = 33,
777       /// \brief ARC's unbridged-cast placeholder type.
778       PREDEF_TYPE_ARC_UNBRIDGED_CAST = 34,
779       /// \brief The pseudo-object placeholder type.
780       PREDEF_TYPE_PSEUDO_OBJECT = 35,
781       /// \brief The placeholder type for builtin functions.
782       PREDEF_TYPE_BUILTIN_FN = 36,
783       /// \brief OpenCL event type.
784       PREDEF_TYPE_EVENT_ID      = 37,
785       /// \brief OpenCL clk event type.
786       PREDEF_TYPE_CLK_EVENT_ID  = 38,
787       /// \brief OpenCL sampler type.
788       PREDEF_TYPE_SAMPLER_ID    = 39,
789       /// \brief OpenCL queue type.
790       PREDEF_TYPE_QUEUE_ID      = 40,
791       /// \brief OpenCL ndrange type.
792       PREDEF_TYPE_NDRANGE_ID    = 41,
793       /// \brief OpenCL reserve_id type.
794       PREDEF_TYPE_RESERVE_ID_ID = 42,
795       /// \brief The placeholder type for OpenMP array section.
796       PREDEF_TYPE_OMP_ARRAY_SECTION = 43,
797       /// \brief The '__float128' type
798       PREDEF_TYPE_FLOAT128_ID = 44,
799       /// \brief OpenCL image types with auto numeration
800 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
801       PREDEF_TYPE_##Id##_ID,
802 #include "clang/Basic/OpenCLImageTypes.def"
803     };
804 
805     /// \brief The number of predefined type IDs that are reserved for
806     /// the PREDEF_TYPE_* constants.
807     ///
808     /// Type IDs for non-predefined types will start at
809     /// NUM_PREDEF_TYPE_IDs.
810     const unsigned NUM_PREDEF_TYPE_IDS = 100;
811 
812     /// \brief Record codes for each kind of type.
813     ///
814     /// These constants describe the type records that can occur within a
815     /// block identified by DECLTYPES_BLOCK_ID in the AST file. Each
816     /// constant describes a record for a specific type class in the
817     /// AST. Note that DeclCode values share this code space.
818     enum TypeCode {
819       /// \brief An ExtQualType record.
820       TYPE_EXT_QUAL                 = 1,
821       /// \brief A ComplexType record.
822       TYPE_COMPLEX                  = 3,
823       /// \brief A PointerType record.
824       TYPE_POINTER                  = 4,
825       /// \brief A BlockPointerType record.
826       TYPE_BLOCK_POINTER            = 5,
827       /// \brief An LValueReferenceType record.
828       TYPE_LVALUE_REFERENCE         = 6,
829       /// \brief An RValueReferenceType record.
830       TYPE_RVALUE_REFERENCE         = 7,
831       /// \brief A MemberPointerType record.
832       TYPE_MEMBER_POINTER           = 8,
833       /// \brief A ConstantArrayType record.
834       TYPE_CONSTANT_ARRAY           = 9,
835       /// \brief An IncompleteArrayType record.
836       TYPE_INCOMPLETE_ARRAY         = 10,
837       /// \brief A VariableArrayType record.
838       TYPE_VARIABLE_ARRAY           = 11,
839       /// \brief A VectorType record.
840       TYPE_VECTOR                   = 12,
841       /// \brief An ExtVectorType record.
842       TYPE_EXT_VECTOR               = 13,
843       /// \brief A FunctionNoProtoType record.
844       TYPE_FUNCTION_NO_PROTO        = 14,
845       /// \brief A FunctionProtoType record.
846       TYPE_FUNCTION_PROTO           = 15,
847       /// \brief A TypedefType record.
848       TYPE_TYPEDEF                  = 16,
849       /// \brief A TypeOfExprType record.
850       TYPE_TYPEOF_EXPR              = 17,
851       /// \brief A TypeOfType record.
852       TYPE_TYPEOF                   = 18,
853       /// \brief A RecordType record.
854       TYPE_RECORD                   = 19,
855       /// \brief An EnumType record.
856       TYPE_ENUM                     = 20,
857       /// \brief An ObjCInterfaceType record.
858       TYPE_OBJC_INTERFACE           = 21,
859       /// \brief An ObjCObjectPointerType record.
860       TYPE_OBJC_OBJECT_POINTER      = 22,
861       /// \brief a DecltypeType record.
862       TYPE_DECLTYPE                 = 23,
863       /// \brief An ElaboratedType record.
864       TYPE_ELABORATED               = 24,
865       /// \brief A SubstTemplateTypeParmType record.
866       TYPE_SUBST_TEMPLATE_TYPE_PARM = 25,
867       /// \brief An UnresolvedUsingType record.
868       TYPE_UNRESOLVED_USING         = 26,
869       /// \brief An InjectedClassNameType record.
870       TYPE_INJECTED_CLASS_NAME      = 27,
871       /// \brief An ObjCObjectType record.
872       TYPE_OBJC_OBJECT              = 28,
873       /// \brief An TemplateTypeParmType record.
874       TYPE_TEMPLATE_TYPE_PARM       = 29,
875       /// \brief An TemplateSpecializationType record.
876       TYPE_TEMPLATE_SPECIALIZATION  = 30,
877       /// \brief A DependentNameType record.
878       TYPE_DEPENDENT_NAME           = 31,
879       /// \brief A DependentTemplateSpecializationType record.
880       TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION = 32,
881       /// \brief A DependentSizedArrayType record.
882       TYPE_DEPENDENT_SIZED_ARRAY    = 33,
883       /// \brief A ParenType record.
884       TYPE_PAREN                    = 34,
885       /// \brief A PackExpansionType record.
886       TYPE_PACK_EXPANSION           = 35,
887       /// \brief An AttributedType record.
888       TYPE_ATTRIBUTED               = 36,
889       /// \brief A SubstTemplateTypeParmPackType record.
890       TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK = 37,
891       /// \brief A AutoType record.
892       TYPE_AUTO                  = 38,
893       /// \brief A UnaryTransformType record.
894       TYPE_UNARY_TRANSFORM       = 39,
895       /// \brief An AtomicType record.
896       TYPE_ATOMIC                = 40,
897       /// \brief A DecayedType record.
898       TYPE_DECAYED               = 41,
899       /// \brief An AdjustedType record.
900       TYPE_ADJUSTED              = 42,
901       /// \brief A PipeType record.
902       TYPE_PIPE                  = 43
903     };
904 
905     /// \brief The type IDs for special types constructed by semantic
906     /// analysis.
907     ///
908     /// The constants in this enumeration are indices into the
909     /// SPECIAL_TYPES record.
910     enum SpecialTypeIDs {
911       /// \brief CFConstantString type
912       SPECIAL_TYPE_CF_CONSTANT_STRING          = 0,
913       /// \brief C FILE typedef type
914       SPECIAL_TYPE_FILE                        = 1,
915       /// \brief C jmp_buf typedef type
916       SPECIAL_TYPE_JMP_BUF                     = 2,
917       /// \brief C sigjmp_buf typedef type
918       SPECIAL_TYPE_SIGJMP_BUF                  = 3,
919       /// \brief Objective-C "id" redefinition type
920       SPECIAL_TYPE_OBJC_ID_REDEFINITION        = 4,
921       /// \brief Objective-C "Class" redefinition type
922       SPECIAL_TYPE_OBJC_CLASS_REDEFINITION     = 5,
923       /// \brief Objective-C "SEL" redefinition type
924       SPECIAL_TYPE_OBJC_SEL_REDEFINITION       = 6,
925       /// \brief C ucontext_t typedef type
926       SPECIAL_TYPE_UCONTEXT_T                  = 7
927     };
928 
929     /// \brief The number of special type IDs.
930     const unsigned NumSpecialTypeIDs = 8;
931 
932     /// \brief Predefined declaration IDs.
933     ///
934     /// These declaration IDs correspond to predefined declarations in the AST
935     /// context, such as the NULL declaration ID. Such declarations are never
936     /// actually serialized, since they will be built by the AST context when
937     /// it is created.
938     enum PredefinedDeclIDs {
939       /// \brief The NULL declaration.
940       PREDEF_DECL_NULL_ID = 0,
941 
942       /// \brief The translation unit.
943       PREDEF_DECL_TRANSLATION_UNIT_ID = 1,
944 
945       /// \brief The Objective-C 'id' type.
946       PREDEF_DECL_OBJC_ID_ID = 2,
947 
948       /// \brief The Objective-C 'SEL' type.
949       PREDEF_DECL_OBJC_SEL_ID = 3,
950 
951       /// \brief The Objective-C 'Class' type.
952       PREDEF_DECL_OBJC_CLASS_ID = 4,
953 
954       /// \brief The Objective-C 'Protocol' type.
955       PREDEF_DECL_OBJC_PROTOCOL_ID = 5,
956 
957       /// \brief The signed 128-bit integer type.
958       PREDEF_DECL_INT_128_ID = 6,
959 
960       /// \brief The unsigned 128-bit integer type.
961       PREDEF_DECL_UNSIGNED_INT_128_ID = 7,
962 
963       /// \brief The internal 'instancetype' typedef.
964       PREDEF_DECL_OBJC_INSTANCETYPE_ID = 8,
965 
966       /// \brief The internal '__builtin_va_list' typedef.
967       PREDEF_DECL_BUILTIN_VA_LIST_ID = 9,
968 
969       /// \brief The internal '__va_list_tag' struct, if any.
970       PREDEF_DECL_VA_LIST_TAG = 10,
971 
972       /// \brief The internal '__builtin_ms_va_list' typedef.
973       PREDEF_DECL_BUILTIN_MS_VA_LIST_ID = 11,
974 
975       /// \brief The extern "C" context.
976       PREDEF_DECL_EXTERN_C_CONTEXT_ID = 12,
977 
978       /// \brief The internal '__make_integer_seq' template.
979       PREDEF_DECL_MAKE_INTEGER_SEQ_ID = 13,
980 
981       /// \brief The internal '__NSConstantString' typedef.
982       PREDEF_DECL_CF_CONSTANT_STRING_ID = 14,
983 
984       /// \brief The internal '__NSConstantString' tag type.
985       PREDEF_DECL_CF_CONSTANT_STRING_TAG_ID = 15,
986 
987       /// \brief The internal '__type_pack_element' template.
988       PREDEF_DECL_TYPE_PACK_ELEMENT_ID = 16,
989     };
990 
991     /// \brief The number of declaration IDs that are predefined.
992     ///
993     /// For more information about predefined declarations, see the
994     /// \c PredefinedDeclIDs type and the PREDEF_DECL_*_ID constants.
995     const unsigned int NUM_PREDEF_DECL_IDS = 17;
996 
997     /// \brief Record of updates for a declaration that was modified after
998     /// being deserialized. This can occur within DECLTYPES_BLOCK_ID.
999     const unsigned int DECL_UPDATES = 49;
1000 
1001     /// \brief Record code for a list of local redeclarations of a declaration.
1002     /// This can occur within DECLTYPES_BLOCK_ID.
1003     const unsigned int LOCAL_REDECLARATIONS = 50;
1004 
1005     /// \brief Record codes for each kind of declaration.
1006     ///
1007     /// These constants describe the declaration records that can occur within
1008     /// a declarations block (identified by DECLTYPES_BLOCK_ID). Each
1009     /// constant describes a record for a specific declaration class
1010     /// in the AST. Note that TypeCode values share this code space.
1011     enum DeclCode {
1012       /// \brief A TypedefDecl record.
1013       DECL_TYPEDEF = 51,
1014       /// \brief A TypeAliasDecl record.
1015       DECL_TYPEALIAS,
1016       /// \brief An EnumDecl record.
1017       DECL_ENUM,
1018       /// \brief A RecordDecl record.
1019       DECL_RECORD,
1020       /// \brief An EnumConstantDecl record.
1021       DECL_ENUM_CONSTANT,
1022       /// \brief A FunctionDecl record.
1023       DECL_FUNCTION,
1024       /// \brief A ObjCMethodDecl record.
1025       DECL_OBJC_METHOD,
1026       /// \brief A ObjCInterfaceDecl record.
1027       DECL_OBJC_INTERFACE,
1028       /// \brief A ObjCProtocolDecl record.
1029       DECL_OBJC_PROTOCOL,
1030       /// \brief A ObjCIvarDecl record.
1031       DECL_OBJC_IVAR,
1032       /// \brief A ObjCAtDefsFieldDecl record.
1033       DECL_OBJC_AT_DEFS_FIELD,
1034       /// \brief A ObjCCategoryDecl record.
1035       DECL_OBJC_CATEGORY,
1036       /// \brief A ObjCCategoryImplDecl record.
1037       DECL_OBJC_CATEGORY_IMPL,
1038       /// \brief A ObjCImplementationDecl record.
1039       DECL_OBJC_IMPLEMENTATION,
1040       /// \brief A ObjCCompatibleAliasDecl record.
1041       DECL_OBJC_COMPATIBLE_ALIAS,
1042       /// \brief A ObjCPropertyDecl record.
1043       DECL_OBJC_PROPERTY,
1044       /// \brief A ObjCPropertyImplDecl record.
1045       DECL_OBJC_PROPERTY_IMPL,
1046       /// \brief A FieldDecl record.
1047       DECL_FIELD,
1048       /// \brief A MSPropertyDecl record.
1049       DECL_MS_PROPERTY,
1050       /// \brief A VarDecl record.
1051       DECL_VAR,
1052       /// \brief An ImplicitParamDecl record.
1053       DECL_IMPLICIT_PARAM,
1054       /// \brief A ParmVarDecl record.
1055       DECL_PARM_VAR,
1056       /// \brief A FileScopeAsmDecl record.
1057       DECL_FILE_SCOPE_ASM,
1058       /// \brief A BlockDecl record.
1059       DECL_BLOCK,
1060       /// \brief A CapturedDecl record.
1061       DECL_CAPTURED,
1062       /// \brief A record that stores the set of declarations that are
1063       /// lexically stored within a given DeclContext.
1064       ///
1065       /// The record itself is a blob that is an array of declaration IDs,
1066       /// in the order in which those declarations were added to the
1067       /// declaration context. This data is used when iterating over
1068       /// the contents of a DeclContext, e.g., via
1069       /// DeclContext::decls_begin() and DeclContext::decls_end().
1070       DECL_CONTEXT_LEXICAL,
1071       /// \brief A record that stores the set of declarations that are
1072       /// visible from a given DeclContext.
1073       ///
1074       /// The record itself stores a set of mappings, each of which
1075       /// associates a declaration name with one or more declaration
1076       /// IDs. This data is used when performing qualified name lookup
1077       /// into a DeclContext via DeclContext::lookup.
1078       DECL_CONTEXT_VISIBLE,
1079       /// \brief A LabelDecl record.
1080       DECL_LABEL,
1081       /// \brief A NamespaceDecl record.
1082       DECL_NAMESPACE,
1083       /// \brief A NamespaceAliasDecl record.
1084       DECL_NAMESPACE_ALIAS,
1085       /// \brief A UsingDecl record.
1086       DECL_USING,
1087       /// \brief A UsingShadowDecl record.
1088       DECL_USING_SHADOW,
1089       /// \brief A ConstructorUsingShadowDecl record.
1090       DECL_CONSTRUCTOR_USING_SHADOW,
1091       /// \brief A UsingDirecitveDecl record.
1092       DECL_USING_DIRECTIVE,
1093       /// \brief An UnresolvedUsingValueDecl record.
1094       DECL_UNRESOLVED_USING_VALUE,
1095       /// \brief An UnresolvedUsingTypenameDecl record.
1096       DECL_UNRESOLVED_USING_TYPENAME,
1097       /// \brief A LinkageSpecDecl record.
1098       DECL_LINKAGE_SPEC,
1099       /// \brief A CXXRecordDecl record.
1100       DECL_CXX_RECORD,
1101       /// \brief A CXXMethodDecl record.
1102       DECL_CXX_METHOD,
1103       /// \brief A CXXConstructorDecl record.
1104       DECL_CXX_CONSTRUCTOR,
1105       /// \brief A CXXConstructorDecl record for an inherited constructor.
1106       DECL_CXX_INHERITED_CONSTRUCTOR,
1107       /// \brief A CXXDestructorDecl record.
1108       DECL_CXX_DESTRUCTOR,
1109       /// \brief A CXXConversionDecl record.
1110       DECL_CXX_CONVERSION,
1111       /// \brief An AccessSpecDecl record.
1112       DECL_ACCESS_SPEC,
1113 
1114       /// \brief A FriendDecl record.
1115       DECL_FRIEND,
1116       /// \brief A FriendTemplateDecl record.
1117       DECL_FRIEND_TEMPLATE,
1118       /// \brief A ClassTemplateDecl record.
1119       DECL_CLASS_TEMPLATE,
1120       /// \brief A ClassTemplateSpecializationDecl record.
1121       DECL_CLASS_TEMPLATE_SPECIALIZATION,
1122       /// \brief A ClassTemplatePartialSpecializationDecl record.
1123       DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION,
1124       /// \brief A VarTemplateDecl record.
1125       DECL_VAR_TEMPLATE,
1126       /// \brief A VarTemplateSpecializationDecl record.
1127       DECL_VAR_TEMPLATE_SPECIALIZATION,
1128       /// \brief A VarTemplatePartialSpecializationDecl record.
1129       DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION,
1130       /// \brief A FunctionTemplateDecl record.
1131       DECL_FUNCTION_TEMPLATE,
1132       /// \brief A TemplateTypeParmDecl record.
1133       DECL_TEMPLATE_TYPE_PARM,
1134       /// \brief A NonTypeTemplateParmDecl record.
1135       DECL_NON_TYPE_TEMPLATE_PARM,
1136       /// \brief A TemplateTemplateParmDecl record.
1137       DECL_TEMPLATE_TEMPLATE_PARM,
1138       /// \brief A TypeAliasTemplateDecl record.
1139       DECL_TYPE_ALIAS_TEMPLATE,
1140       /// \brief A StaticAssertDecl record.
1141       DECL_STATIC_ASSERT,
1142       /// \brief A record containing CXXBaseSpecifiers.
1143       DECL_CXX_BASE_SPECIFIERS,
1144       /// \brief A record containing CXXCtorInitializers.
1145       DECL_CXX_CTOR_INITIALIZERS,
1146       /// \brief A IndirectFieldDecl record.
1147       DECL_INDIRECTFIELD,
1148       /// \brief A NonTypeTemplateParmDecl record that stores an expanded
1149       /// non-type template parameter pack.
1150       DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK,
1151       /// \brief A TemplateTemplateParmDecl record that stores an expanded
1152       /// template template parameter pack.
1153       DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK,
1154       /// \brief A ClassScopeFunctionSpecializationDecl record a class scope
1155       /// function specialization. (Microsoft extension).
1156       DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION,
1157       /// \brief An ImportDecl recording a module import.
1158       DECL_IMPORT,
1159       /// \brief An OMPThreadPrivateDecl record.
1160       DECL_OMP_THREADPRIVATE,
1161       /// \brief An EmptyDecl record.
1162       DECL_EMPTY,
1163       /// \brief An ObjCTypeParamDecl record.
1164       DECL_OBJC_TYPE_PARAM,
1165       /// \brief An OMPCapturedExprDecl record.
1166       DECL_OMP_CAPTUREDEXPR,
1167       /// \brief A PragmaCommentDecl record.
1168       DECL_PRAGMA_COMMENT,
1169       /// \brief A PragmaDetectMismatchDecl record.
1170       DECL_PRAGMA_DETECT_MISMATCH,
1171       /// \brief An OMPDeclareReductionDecl record.
1172       DECL_OMP_DECLARE_REDUCTION,
1173     };
1174 
1175     /// \brief Record codes for each kind of statement or expression.
1176     ///
1177     /// These constants describe the records that describe statements
1178     /// or expressions. These records  occur within type and declarations
1179     /// block, so they begin with record values of 128.  Each constant
1180     /// describes a record for a specific statement or expression class in the
1181     /// AST.
1182     enum StmtCode {
1183       /// \brief A marker record that indicates that we are at the end
1184       /// of an expression.
1185       STMT_STOP = 128,
1186       /// \brief A NULL expression.
1187       STMT_NULL_PTR,
1188       /// \brief A reference to a previously [de]serialized Stmt record.
1189       STMT_REF_PTR,
1190       /// \brief A NullStmt record.
1191       STMT_NULL,
1192       /// \brief A CompoundStmt record.
1193       STMT_COMPOUND,
1194       /// \brief A CaseStmt record.
1195       STMT_CASE,
1196       /// \brief A DefaultStmt record.
1197       STMT_DEFAULT,
1198       /// \brief A LabelStmt record.
1199       STMT_LABEL,
1200       /// \brief An AttributedStmt record.
1201       STMT_ATTRIBUTED,
1202       /// \brief An IfStmt record.
1203       STMT_IF,
1204       /// \brief A SwitchStmt record.
1205       STMT_SWITCH,
1206       /// \brief A WhileStmt record.
1207       STMT_WHILE,
1208       /// \brief A DoStmt record.
1209       STMT_DO,
1210       /// \brief A ForStmt record.
1211       STMT_FOR,
1212       /// \brief A GotoStmt record.
1213       STMT_GOTO,
1214       /// \brief An IndirectGotoStmt record.
1215       STMT_INDIRECT_GOTO,
1216       /// \brief A ContinueStmt record.
1217       STMT_CONTINUE,
1218       /// \brief A BreakStmt record.
1219       STMT_BREAK,
1220       /// \brief A ReturnStmt record.
1221       STMT_RETURN,
1222       /// \brief A DeclStmt record.
1223       STMT_DECL,
1224       /// \brief A CapturedStmt record.
1225       STMT_CAPTURED,
1226       /// \brief A GCC-style AsmStmt record.
1227       STMT_GCCASM,
1228       /// \brief A MS-style AsmStmt record.
1229       STMT_MSASM,
1230       /// \brief A PredefinedExpr record.
1231       EXPR_PREDEFINED,
1232       /// \brief A DeclRefExpr record.
1233       EXPR_DECL_REF,
1234       /// \brief An IntegerLiteral record.
1235       EXPR_INTEGER_LITERAL,
1236       /// \brief A FloatingLiteral record.
1237       EXPR_FLOATING_LITERAL,
1238       /// \brief An ImaginaryLiteral record.
1239       EXPR_IMAGINARY_LITERAL,
1240       /// \brief A StringLiteral record.
1241       EXPR_STRING_LITERAL,
1242       /// \brief A CharacterLiteral record.
1243       EXPR_CHARACTER_LITERAL,
1244       /// \brief A ParenExpr record.
1245       EXPR_PAREN,
1246       /// \brief A ParenListExpr record.
1247       EXPR_PAREN_LIST,
1248       /// \brief A UnaryOperator record.
1249       EXPR_UNARY_OPERATOR,
1250       /// \brief An OffsetOfExpr record.
1251       EXPR_OFFSETOF,
1252       /// \brief A SizefAlignOfExpr record.
1253       EXPR_SIZEOF_ALIGN_OF,
1254       /// \brief An ArraySubscriptExpr record.
1255       EXPR_ARRAY_SUBSCRIPT,
1256       /// \brief A CallExpr record.
1257       EXPR_CALL,
1258       /// \brief A MemberExpr record.
1259       EXPR_MEMBER,
1260       /// \brief A BinaryOperator record.
1261       EXPR_BINARY_OPERATOR,
1262       /// \brief A CompoundAssignOperator record.
1263       EXPR_COMPOUND_ASSIGN_OPERATOR,
1264       /// \brief A ConditionOperator record.
1265       EXPR_CONDITIONAL_OPERATOR,
1266       /// \brief An ImplicitCastExpr record.
1267       EXPR_IMPLICIT_CAST,
1268       /// \brief A CStyleCastExpr record.
1269       EXPR_CSTYLE_CAST,
1270       /// \brief A CompoundLiteralExpr record.
1271       EXPR_COMPOUND_LITERAL,
1272       /// \brief An ExtVectorElementExpr record.
1273       EXPR_EXT_VECTOR_ELEMENT,
1274       /// \brief An InitListExpr record.
1275       EXPR_INIT_LIST,
1276       /// \brief A DesignatedInitExpr record.
1277       EXPR_DESIGNATED_INIT,
1278       /// \brief A DesignatedInitUpdateExpr record.
1279       EXPR_DESIGNATED_INIT_UPDATE,
1280       /// \brief An ImplicitValueInitExpr record.
1281       EXPR_IMPLICIT_VALUE_INIT,
1282       /// \brief An NoInitExpr record.
1283       EXPR_NO_INIT,
1284       /// \brief A VAArgExpr record.
1285       EXPR_VA_ARG,
1286       /// \brief An AddrLabelExpr record.
1287       EXPR_ADDR_LABEL,
1288       /// \brief A StmtExpr record.
1289       EXPR_STMT,
1290       /// \brief A ChooseExpr record.
1291       EXPR_CHOOSE,
1292       /// \brief A GNUNullExpr record.
1293       EXPR_GNU_NULL,
1294       /// \brief A ShuffleVectorExpr record.
1295       EXPR_SHUFFLE_VECTOR,
1296       /// \brief A ConvertVectorExpr record.
1297       EXPR_CONVERT_VECTOR,
1298       /// \brief BlockExpr
1299       EXPR_BLOCK,
1300       /// \brief A GenericSelectionExpr record.
1301       EXPR_GENERIC_SELECTION,
1302       /// \brief A PseudoObjectExpr record.
1303       EXPR_PSEUDO_OBJECT,
1304       /// \brief An AtomicExpr record.
1305       EXPR_ATOMIC,
1306 
1307       // Objective-C
1308 
1309       /// \brief An ObjCStringLiteral record.
1310       EXPR_OBJC_STRING_LITERAL,
1311 
1312       EXPR_OBJC_BOXED_EXPRESSION,
1313       EXPR_OBJC_ARRAY_LITERAL,
1314       EXPR_OBJC_DICTIONARY_LITERAL,
1315 
1316 
1317       /// \brief An ObjCEncodeExpr record.
1318       EXPR_OBJC_ENCODE,
1319       /// \brief An ObjCSelectorExpr record.
1320       EXPR_OBJC_SELECTOR_EXPR,
1321       /// \brief An ObjCProtocolExpr record.
1322       EXPR_OBJC_PROTOCOL_EXPR,
1323       /// \brief An ObjCIvarRefExpr record.
1324       EXPR_OBJC_IVAR_REF_EXPR,
1325       /// \brief An ObjCPropertyRefExpr record.
1326       EXPR_OBJC_PROPERTY_REF_EXPR,
1327       /// \brief An ObjCSubscriptRefExpr record.
1328       EXPR_OBJC_SUBSCRIPT_REF_EXPR,
1329       /// \brief UNUSED
1330       EXPR_OBJC_KVC_REF_EXPR,
1331       /// \brief An ObjCMessageExpr record.
1332       EXPR_OBJC_MESSAGE_EXPR,
1333       /// \brief An ObjCIsa Expr record.
1334       EXPR_OBJC_ISA,
1335       /// \brief An ObjCIndirectCopyRestoreExpr record.
1336       EXPR_OBJC_INDIRECT_COPY_RESTORE,
1337 
1338       /// \brief An ObjCForCollectionStmt record.
1339       STMT_OBJC_FOR_COLLECTION,
1340       /// \brief An ObjCAtCatchStmt record.
1341       STMT_OBJC_CATCH,
1342       /// \brief An ObjCAtFinallyStmt record.
1343       STMT_OBJC_FINALLY,
1344       /// \brief An ObjCAtTryStmt record.
1345       STMT_OBJC_AT_TRY,
1346       /// \brief An ObjCAtSynchronizedStmt record.
1347       STMT_OBJC_AT_SYNCHRONIZED,
1348       /// \brief An ObjCAtThrowStmt record.
1349       STMT_OBJC_AT_THROW,
1350       /// \brief An ObjCAutoreleasePoolStmt record.
1351       STMT_OBJC_AUTORELEASE_POOL,
1352       /// \brief A ObjCBoolLiteralExpr record.
1353       EXPR_OBJC_BOOL_LITERAL,
1354 
1355       // C++
1356 
1357       /// \brief A CXXCatchStmt record.
1358       STMT_CXX_CATCH,
1359       /// \brief A CXXTryStmt record.
1360       STMT_CXX_TRY,
1361       /// \brief A CXXForRangeStmt record.
1362       STMT_CXX_FOR_RANGE,
1363 
1364       /// \brief A CXXOperatorCallExpr record.
1365       EXPR_CXX_OPERATOR_CALL,
1366       /// \brief A CXXMemberCallExpr record.
1367       EXPR_CXX_MEMBER_CALL,
1368       /// \brief A CXXConstructExpr record.
1369       EXPR_CXX_CONSTRUCT,
1370       /// \brief A CXXInheritedCtorInitExpr record.
1371       EXPR_CXX_INHERITED_CTOR_INIT,
1372       /// \brief A CXXTemporaryObjectExpr record.
1373       EXPR_CXX_TEMPORARY_OBJECT,
1374       /// \brief A CXXStaticCastExpr record.
1375       EXPR_CXX_STATIC_CAST,
1376       /// \brief A CXXDynamicCastExpr record.
1377       EXPR_CXX_DYNAMIC_CAST,
1378       /// \brief A CXXReinterpretCastExpr record.
1379       EXPR_CXX_REINTERPRET_CAST,
1380       /// \brief A CXXConstCastExpr record.
1381       EXPR_CXX_CONST_CAST,
1382       /// \brief A CXXFunctionalCastExpr record.
1383       EXPR_CXX_FUNCTIONAL_CAST,
1384       /// \brief A UserDefinedLiteral record.
1385       EXPR_USER_DEFINED_LITERAL,
1386       /// \brief A CXXStdInitializerListExpr record.
1387       EXPR_CXX_STD_INITIALIZER_LIST,
1388       /// \brief A CXXBoolLiteralExpr record.
1389       EXPR_CXX_BOOL_LITERAL,
1390       EXPR_CXX_NULL_PTR_LITERAL,  // CXXNullPtrLiteralExpr
1391       EXPR_CXX_TYPEID_EXPR,       // CXXTypeidExpr (of expr).
1392       EXPR_CXX_TYPEID_TYPE,       // CXXTypeidExpr (of type).
1393       EXPR_CXX_THIS,              // CXXThisExpr
1394       EXPR_CXX_THROW,             // CXXThrowExpr
1395       EXPR_CXX_DEFAULT_ARG,       // CXXDefaultArgExpr
1396       EXPR_CXX_DEFAULT_INIT,      // CXXDefaultInitExpr
1397       EXPR_CXX_BIND_TEMPORARY,    // CXXBindTemporaryExpr
1398 
1399       EXPR_CXX_SCALAR_VALUE_INIT, // CXXScalarValueInitExpr
1400       EXPR_CXX_NEW,               // CXXNewExpr
1401       EXPR_CXX_DELETE,            // CXXDeleteExpr
1402       EXPR_CXX_PSEUDO_DESTRUCTOR, // CXXPseudoDestructorExpr
1403 
1404       EXPR_EXPR_WITH_CLEANUPS,    // ExprWithCleanups
1405 
1406       EXPR_CXX_DEPENDENT_SCOPE_MEMBER,   // CXXDependentScopeMemberExpr
1407       EXPR_CXX_DEPENDENT_SCOPE_DECL_REF, // DependentScopeDeclRefExpr
1408       EXPR_CXX_UNRESOLVED_CONSTRUCT,     // CXXUnresolvedConstructExpr
1409       EXPR_CXX_UNRESOLVED_MEMBER,        // UnresolvedMemberExpr
1410       EXPR_CXX_UNRESOLVED_LOOKUP,        // UnresolvedLookupExpr
1411 
1412       EXPR_CXX_EXPRESSION_TRAIT,  // ExpressionTraitExpr
1413       EXPR_CXX_NOEXCEPT,          // CXXNoexceptExpr
1414 
1415       EXPR_OPAQUE_VALUE,          // OpaqueValueExpr
1416       EXPR_BINARY_CONDITIONAL_OPERATOR,  // BinaryConditionalOperator
1417       EXPR_TYPE_TRAIT,            // TypeTraitExpr
1418       EXPR_ARRAY_TYPE_TRAIT,      // ArrayTypeTraitIntExpr
1419 
1420       EXPR_PACK_EXPANSION,        // PackExpansionExpr
1421       EXPR_SIZEOF_PACK,           // SizeOfPackExpr
1422       EXPR_SUBST_NON_TYPE_TEMPLATE_PARM, // SubstNonTypeTemplateParmExpr
1423       EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK,// SubstNonTypeTemplateParmPackExpr
1424       EXPR_FUNCTION_PARM_PACK,    // FunctionParmPackExpr
1425       EXPR_MATERIALIZE_TEMPORARY, // MaterializeTemporaryExpr
1426       EXPR_CXX_FOLD,              // CXXFoldExpr
1427 
1428       // CUDA
1429       EXPR_CUDA_KERNEL_CALL,       // CUDAKernelCallExpr
1430 
1431       // OpenCL
1432       EXPR_ASTYPE,                 // AsTypeExpr
1433 
1434       // Microsoft
1435       EXPR_CXX_PROPERTY_REF_EXPR, // MSPropertyRefExpr
1436       EXPR_CXX_PROPERTY_SUBSCRIPT_EXPR, // MSPropertySubscriptExpr
1437       EXPR_CXX_UUIDOF_EXPR,       // CXXUuidofExpr (of expr).
1438       EXPR_CXX_UUIDOF_TYPE,       // CXXUuidofExpr (of type).
1439       STMT_SEH_LEAVE,             // SEHLeaveStmt
1440       STMT_SEH_EXCEPT,            // SEHExceptStmt
1441       STMT_SEH_FINALLY,           // SEHFinallyStmt
1442       STMT_SEH_TRY,               // SEHTryStmt
1443 
1444       // OpenMP directives
1445       STMT_OMP_PARALLEL_DIRECTIVE,
1446       STMT_OMP_SIMD_DIRECTIVE,
1447       STMT_OMP_FOR_DIRECTIVE,
1448       STMT_OMP_FOR_SIMD_DIRECTIVE,
1449       STMT_OMP_SECTIONS_DIRECTIVE,
1450       STMT_OMP_SECTION_DIRECTIVE,
1451       STMT_OMP_SINGLE_DIRECTIVE,
1452       STMT_OMP_MASTER_DIRECTIVE,
1453       STMT_OMP_CRITICAL_DIRECTIVE,
1454       STMT_OMP_PARALLEL_FOR_DIRECTIVE,
1455       STMT_OMP_PARALLEL_FOR_SIMD_DIRECTIVE,
1456       STMT_OMP_PARALLEL_SECTIONS_DIRECTIVE,
1457       STMT_OMP_TASK_DIRECTIVE,
1458       STMT_OMP_TASKYIELD_DIRECTIVE,
1459       STMT_OMP_BARRIER_DIRECTIVE,
1460       STMT_OMP_TASKWAIT_DIRECTIVE,
1461       STMT_OMP_FLUSH_DIRECTIVE,
1462       STMT_OMP_ORDERED_DIRECTIVE,
1463       STMT_OMP_ATOMIC_DIRECTIVE,
1464       STMT_OMP_TARGET_DIRECTIVE,
1465       STMT_OMP_TARGET_DATA_DIRECTIVE,
1466       STMT_OMP_TARGET_ENTER_DATA_DIRECTIVE,
1467       STMT_OMP_TARGET_EXIT_DATA_DIRECTIVE,
1468       STMT_OMP_TARGET_PARALLEL_DIRECTIVE,
1469       STMT_OMP_TARGET_PARALLEL_FOR_DIRECTIVE,
1470       STMT_OMP_TEAMS_DIRECTIVE,
1471       STMT_OMP_TASKGROUP_DIRECTIVE,
1472       STMT_OMP_CANCELLATION_POINT_DIRECTIVE,
1473       STMT_OMP_CANCEL_DIRECTIVE,
1474       STMT_OMP_TASKLOOP_DIRECTIVE,
1475       STMT_OMP_TASKLOOP_SIMD_DIRECTIVE,
1476       STMT_OMP_DISTRIBUTE_DIRECTIVE,
1477       STMT_OMP_TARGET_UPDATE_DIRECTIVE,
1478       STMT_OMP_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE,
1479       STMT_OMP_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE,
1480       STMT_OMP_DISTRIBUTE_SIMD_DIRECTIVE,
1481       STMT_OMP_TARGET_PARALLEL_FOR_SIMD_DIRECTIVE,
1482       EXPR_OMP_ARRAY_SECTION,
1483 
1484       // ARC
1485       EXPR_OBJC_BRIDGED_CAST,     // ObjCBridgedCastExpr
1486 
1487       STMT_MS_DEPENDENT_EXISTS,   // MSDependentExistsStmt
1488       EXPR_LAMBDA                 // LambdaExpr
1489     };
1490 
1491     /// \brief The kinds of designators that can occur in a
1492     /// DesignatedInitExpr.
1493     enum DesignatorTypes {
1494       /// \brief Field designator where only the field name is known.
1495       DESIG_FIELD_NAME  = 0,
1496       /// \brief Field designator where the field has been resolved to
1497       /// a declaration.
1498       DESIG_FIELD_DECL  = 1,
1499       /// \brief Array designator.
1500       DESIG_ARRAY       = 2,
1501       /// \brief GNU array range designator.
1502       DESIG_ARRAY_RANGE = 3
1503     };
1504 
1505     /// \brief The different kinds of data that can occur in a
1506     /// CtorInitializer.
1507     enum CtorInitializerType {
1508       CTOR_INITIALIZER_BASE,
1509       CTOR_INITIALIZER_DELEGATING,
1510       CTOR_INITIALIZER_MEMBER,
1511       CTOR_INITIALIZER_INDIRECT_MEMBER
1512     };
1513 
1514     /// \brief Describes the redeclarations of a declaration.
1515     struct LocalRedeclarationsInfo {
1516       DeclID FirstID;      // The ID of the first declaration
1517       unsigned Offset;     // Offset into the array of redeclaration chains.
1518 
1519       friend bool operator<(const LocalRedeclarationsInfo &X,
1520                             const LocalRedeclarationsInfo &Y) {
1521         return X.FirstID < Y.FirstID;
1522       }
1523 
1524       friend bool operator>(const LocalRedeclarationsInfo &X,
1525                             const LocalRedeclarationsInfo &Y) {
1526         return X.FirstID > Y.FirstID;
1527       }
1528 
1529       friend bool operator<=(const LocalRedeclarationsInfo &X,
1530                              const LocalRedeclarationsInfo &Y) {
1531         return X.FirstID <= Y.FirstID;
1532       }
1533 
1534       friend bool operator>=(const LocalRedeclarationsInfo &X,
1535                              const LocalRedeclarationsInfo &Y) {
1536         return X.FirstID >= Y.FirstID;
1537       }
1538     };
1539 
1540     /// \brief Describes the categories of an Objective-C class.
1541     struct ObjCCategoriesInfo {
1542       DeclID DefinitionID; // The ID of the definition
1543       unsigned Offset;     // Offset into the array of category lists.
1544 
1545       friend bool operator<(const ObjCCategoriesInfo &X,
1546                             const ObjCCategoriesInfo &Y) {
1547         return X.DefinitionID < Y.DefinitionID;
1548       }
1549 
1550       friend bool operator>(const ObjCCategoriesInfo &X,
1551                             const ObjCCategoriesInfo &Y) {
1552         return X.DefinitionID > Y.DefinitionID;
1553       }
1554 
1555       friend bool operator<=(const ObjCCategoriesInfo &X,
1556                              const ObjCCategoriesInfo &Y) {
1557         return X.DefinitionID <= Y.DefinitionID;
1558       }
1559 
1560       friend bool operator>=(const ObjCCategoriesInfo &X,
1561                              const ObjCCategoriesInfo &Y) {
1562         return X.DefinitionID >= Y.DefinitionID;
1563       }
1564     };
1565 
1566     /// \brief A key used when looking up entities by \ref DeclarationName.
1567     ///
1568     /// Different \ref DeclarationNames are mapped to different keys, but the
1569     /// same key can occasionally represent multiple names (for names that
1570     /// contain types, in particular).
1571     class DeclarationNameKey {
1572       typedef unsigned NameKind;
1573 
1574       NameKind Kind;
1575       uint64_t Data;
1576 
1577     public:
DeclarationNameKey()1578       DeclarationNameKey() : Kind(), Data() {}
1579       DeclarationNameKey(DeclarationName Name);
1580 
DeclarationNameKey(NameKind Kind,uint64_t Data)1581       DeclarationNameKey(NameKind Kind, uint64_t Data)
1582           : Kind(Kind), Data(Data) {}
1583 
getKind()1584       NameKind getKind() const { return Kind; }
1585 
getIdentifier()1586       IdentifierInfo *getIdentifier() const {
1587         assert(Kind == DeclarationName::Identifier ||
1588                Kind == DeclarationName::CXXLiteralOperatorName);
1589         return (IdentifierInfo *)Data;
1590       }
getSelector()1591       Selector getSelector() const {
1592         assert(Kind == DeclarationName::ObjCZeroArgSelector ||
1593                Kind == DeclarationName::ObjCOneArgSelector ||
1594                Kind == DeclarationName::ObjCMultiArgSelector);
1595         return Selector(Data);
1596       }
getOperatorKind()1597       OverloadedOperatorKind getOperatorKind() const {
1598         assert(Kind == DeclarationName::CXXOperatorName);
1599         return (OverloadedOperatorKind)Data;
1600       }
1601 
1602       /// Compute a fingerprint of this key for use in on-disk hash table.
1603       unsigned getHash() const;
1604 
1605       friend bool operator==(const DeclarationNameKey &A,
1606                              const DeclarationNameKey &B) {
1607         return A.Kind == B.Kind && A.Data == B.Data;
1608       }
1609     };
1610 
1611     /// @}
1612   }
1613 } // end namespace clang
1614 
1615 namespace llvm {
1616   template <> struct DenseMapInfo<clang::serialization::DeclarationNameKey> {
1617     static clang::serialization::DeclarationNameKey getEmptyKey() {
1618       return clang::serialization::DeclarationNameKey(-1, 1);
1619     }
1620     static clang::serialization::DeclarationNameKey getTombstoneKey() {
1621       return clang::serialization::DeclarationNameKey(-1, 2);
1622     }
1623     static unsigned
1624     getHashValue(const clang::serialization::DeclarationNameKey &Key) {
1625       return Key.getHash();
1626     }
1627     static bool isEqual(const clang::serialization::DeclarationNameKey &L,
1628                         const clang::serialization::DeclarationNameKey &R) {
1629       return L == R;
1630     }
1631   };
1632 }
1633 
1634 #endif
1635