xref: /freebsd/contrib/llvm-project/clang/include/clang/Serialization/ASTBitCodes.h (revision 62987288060ff68c817b7056815aa9fb8ba8ecd7)
1 //===- ASTBitCodes.h - Enum values for the PCH bitcode format ---*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This header defines Bitcode enum values for Clang serialized AST files.
10 //
11 // The enum values defined in this file should be considered permanent.  If
12 // new features are added, they should have values added at the end of the
13 // respective lists.
14 //
15 //===----------------------------------------------------------------------===//
16 
17 #ifndef LLVM_CLANG_SERIALIZATION_ASTBITCODES_H
18 #define LLVM_CLANG_SERIALIZATION_ASTBITCODES_H
19 
20 #include "clang/AST/DeclID.h"
21 #include "clang/AST/DeclarationName.h"
22 #include "clang/AST/Type.h"
23 #include "clang/Basic/IdentifierTable.h"
24 #include "clang/Basic/OperatorKinds.h"
25 #include "clang/Basic/SourceLocation.h"
26 #include "clang/Serialization/SourceLocationEncoding.h"
27 #include "llvm/ADT/DenseMapInfo.h"
28 #include "llvm/Bitstream/BitCodes.h"
29 #include "llvm/Support/MathExtras.h"
30 #include <cassert>
31 #include <cstdint>
32 
33 namespace clang {
34 namespace serialization {
35 
36 /// AST file major version number supported by this version of
37 /// Clang.
38 ///
39 /// Whenever the AST file format changes in a way that makes it
40 /// incompatible with previous versions (such that a reader
41 /// designed for the previous version could not support reading
42 /// the new version), this number should be increased.
43 ///
44 /// Version 4 of AST files also requires that the version control branch and
45 /// revision match exactly, since there is no backward compatibility of
46 /// AST files at this time.
47 const unsigned VERSION_MAJOR = 31;
48 
49 /// AST file minor version number supported by this version of
50 /// Clang.
51 ///
52 /// Whenever the AST format changes in a way that is still
53 /// compatible with previous versions (such that a reader designed
54 /// for the previous version could still support reading the new
55 /// version by ignoring new kinds of subblocks), this number
56 /// should be increased.
57 const unsigned VERSION_MINOR = 1;
58 
59 /// An ID number that refers to an identifier in an AST file.
60 ///
61 /// The ID numbers of identifiers are consecutive (in order of discovery)
62 /// and start at 1. 0 is reserved for NULL.
63 using IdentifierID = uint64_t;
64 
65 /// The number of predefined identifier IDs.
66 const unsigned int NUM_PREDEF_IDENT_IDS = 1;
67 
68 /// An ID number that refers to a declaration in an AST file. See the comments
69 /// in DeclIDBase for details.
70 using DeclID = DeclIDBase::DeclID;
71 
72 /// An ID number that refers to a type in an AST file.
73 ///
74 /// The ID of a type is partitioned into three parts:
75 /// - the lower three bits are used to store the const/volatile/restrict
76 ///   qualifiers (as with QualType).
77 /// - the next 29 bits provide a type index in the corresponding
78 ///   module file.
79 /// - the upper 32 bits provide a module file index.
80 ///
81 /// The type index values are partitioned into two
82 /// sets. The values below NUM_PREDEF_TYPE_IDs are predefined type
83 /// IDs (based on the PREDEF_TYPE_*_ID constants), with 0 as a
84 /// placeholder for "no type". The module file index for predefined
85 /// types are always 0 since they don't belong to any modules.
86 /// Values from NUM_PREDEF_TYPE_IDs are other types that have
87 /// serialized representations.
88 using TypeID = uint64_t;
89 /// Same with TypeID except that the LocalTypeID is only meaningful
90 /// with the corresponding ModuleFile.
91 ///
92 /// FIXME: Make TypeID and LocalTypeID a class to improve the type
93 /// safety.
94 using LocalTypeID = TypeID;
95 
96 /// A type index; the type ID with the qualifier bits removed.
97 /// Keep structure alignment 32-bit since the blob is assumed as 32-bit
98 /// aligned.
99 class TypeIdx {
100   uint32_t ModuleFileIndex = 0;
101   uint32_t Idx = 0;
102 
103 public:
104   TypeIdx() = default;
105 
TypeIdx(uint32_t ModuleFileIdx,uint32_t Idx)106   explicit TypeIdx(uint32_t ModuleFileIdx, uint32_t Idx)
107       : ModuleFileIndex(ModuleFileIdx), Idx(Idx) {}
108 
getModuleFileIndex()109   uint32_t getModuleFileIndex() const { return ModuleFileIndex; }
110 
getValue()111   uint64_t getValue() const { return ((uint64_t)ModuleFileIndex << 32) | Idx; }
112 
asTypeID(unsigned FastQuals)113   TypeID asTypeID(unsigned FastQuals) const {
114     if (Idx == uint32_t(-1))
115       return TypeID(-1);
116 
117     unsigned Index = (Idx << Qualifiers::FastWidth) | FastQuals;
118     return ((uint64_t)ModuleFileIndex << 32) | Index;
119   }
120 
fromTypeID(TypeID ID)121   static TypeIdx fromTypeID(TypeID ID) {
122     if (ID == TypeID(-1))
123       return TypeIdx(0, -1);
124 
125     return TypeIdx(ID >> 32, (ID & llvm::maskTrailingOnes<TypeID>(32)) >>
126                                  Qualifiers::FastWidth);
127   }
128 };
129 
130 static_assert(alignof(TypeIdx) == 4);
131 
132 /// A structure for putting "fast"-unqualified QualTypes into a
133 /// DenseMap.  This uses the standard pointer hash function.
134 struct UnsafeQualTypeDenseMapInfo {
isEqualUnsafeQualTypeDenseMapInfo135   static bool isEqual(QualType A, QualType B) { return A == B; }
136 
getEmptyKeyUnsafeQualTypeDenseMapInfo137   static QualType getEmptyKey() {
138     return QualType::getFromOpaquePtr((void *)1);
139   }
140 
getTombstoneKeyUnsafeQualTypeDenseMapInfo141   static QualType getTombstoneKey() {
142     return QualType::getFromOpaquePtr((void *)2);
143   }
144 
getHashValueUnsafeQualTypeDenseMapInfo145   static unsigned getHashValue(QualType T) {
146     assert(!T.getLocalFastQualifiers() &&
147            "hash invalid for types with fast quals");
148     uintptr_t v = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr());
149     return (unsigned(v) >> 4) ^ (unsigned(v) >> 9);
150   }
151 };
152 
153 /// An ID number that refers to a macro in an AST file.
154 using MacroID = uint32_t;
155 
156 /// A global ID number that refers to a macro in an AST file.
157 using GlobalMacroID = uint32_t;
158 
159 /// A local to a module ID number that refers to a macro in an
160 /// AST file.
161 using LocalMacroID = uint32_t;
162 
163 /// The number of predefined macro IDs.
164 const unsigned int NUM_PREDEF_MACRO_IDS = 1;
165 
166 /// An ID number that refers to an ObjC selector in an AST file.
167 using SelectorID = uint32_t;
168 
169 /// The number of predefined selector IDs.
170 const unsigned int NUM_PREDEF_SELECTOR_IDS = 1;
171 
172 /// An ID number that refers to a set of CXXBaseSpecifiers in an
173 /// AST file.
174 using CXXBaseSpecifiersID = uint32_t;
175 
176 /// An ID number that refers to a list of CXXCtorInitializers in an
177 /// AST file.
178 using CXXCtorInitializersID = uint32_t;
179 
180 /// An ID number that refers to an entity in the detailed
181 /// preprocessing record.
182 using PreprocessedEntityID = uint32_t;
183 
184 /// An ID number that refers to a submodule in a module file.
185 using SubmoduleID = uint32_t;
186 
187 /// The number of predefined submodule IDs.
188 const unsigned int NUM_PREDEF_SUBMODULE_IDS = 1;
189 
190 /// 32 aligned uint64_t in the AST file. Use splitted 64-bit integer into
191 /// low/high parts to keep structure alignment 32-bit (it is important
192 /// because blobs in bitstream are 32-bit aligned). This structure is
193 /// serialized "as is" to the AST file.
194 class UnalignedUInt64 {
195   uint32_t BitLow = 0;
196   uint32_t BitHigh = 0;
197 
198 public:
199   UnalignedUInt64() = default;
UnalignedUInt64(uint64_t BitOffset)200   UnalignedUInt64(uint64_t BitOffset) { set(BitOffset); }
201 
set(uint64_t Offset)202   void set(uint64_t Offset) {
203     BitLow = Offset;
204     BitHigh = Offset >> 32;
205   }
206 
get()207   uint64_t get() const { return BitLow | (uint64_t(BitHigh) << 32); }
208 };
209 
210 /// Source range/offset of a preprocessed entity.
211 class PPEntityOffset {
212   using RawLocEncoding = SourceLocationEncoding::RawLocEncoding;
213 
214   /// Raw source location of beginning of range.
215   UnalignedUInt64 Begin;
216 
217   /// Raw source location of end of range.
218   UnalignedUInt64 End;
219 
220   /// Offset in the AST file relative to ModuleFile::MacroOffsetsBase.
221   uint32_t BitOffset;
222 
223 public:
PPEntityOffset(RawLocEncoding Begin,RawLocEncoding End,uint32_t BitOffset)224   PPEntityOffset(RawLocEncoding Begin, RawLocEncoding End, uint32_t BitOffset)
225       : Begin(Begin), End(End), BitOffset(BitOffset) {}
226 
getBegin()227   RawLocEncoding getBegin() const { return Begin.get(); }
getEnd()228   RawLocEncoding getEnd() const { return End.get(); }
229 
getOffset()230   uint32_t getOffset() const { return BitOffset; }
231 };
232 
233 /// Source range of a skipped preprocessor region
234 class PPSkippedRange {
235   using RawLocEncoding = SourceLocationEncoding::RawLocEncoding;
236 
237   /// Raw source location of beginning of range.
238   UnalignedUInt64 Begin;
239   /// Raw source location of end of range.
240   UnalignedUInt64 End;
241 
242 public:
PPSkippedRange(RawLocEncoding Begin,RawLocEncoding End)243   PPSkippedRange(RawLocEncoding Begin, RawLocEncoding End)
244       : Begin(Begin), End(End) {}
245 
getBegin()246   RawLocEncoding getBegin() const { return Begin.get(); }
getEnd()247   RawLocEncoding getEnd() const { return End.get(); }
248 };
249 
250 /// Source location and bit offset of a declaration. Keep
251 /// structure alignment 32-bit since the blob is assumed as 32-bit aligned.
252 class DeclOffset {
253   using RawLocEncoding = SourceLocationEncoding::RawLocEncoding;
254 
255   /// Raw source location.
256   UnalignedUInt64 RawLoc;
257 
258   /// Offset relative to the start of the DECLTYPES_BLOCK block.
259   UnalignedUInt64 BitOffset;
260 
261 public:
262   DeclOffset() = default;
DeclOffset(RawLocEncoding RawLoc,uint64_t BitOffset,uint64_t DeclTypesBlockStartOffset)263   DeclOffset(RawLocEncoding RawLoc, uint64_t BitOffset,
264              uint64_t DeclTypesBlockStartOffset)
265       : RawLoc(RawLoc) {
266     setBitOffset(BitOffset, DeclTypesBlockStartOffset);
267   }
268 
setRawLoc(RawLocEncoding Loc)269   void setRawLoc(RawLocEncoding Loc) { RawLoc = Loc; }
270 
getRawLoc()271   RawLocEncoding getRawLoc() const { return RawLoc.get(); }
272 
setBitOffset(uint64_t Offset,const uint64_t DeclTypesBlockStartOffset)273   void setBitOffset(uint64_t Offset, const uint64_t DeclTypesBlockStartOffset) {
274     BitOffset.set(Offset - DeclTypesBlockStartOffset);
275   }
276 
getBitOffset(const uint64_t DeclTypesBlockStartOffset)277   uint64_t getBitOffset(const uint64_t DeclTypesBlockStartOffset) const {
278     return BitOffset.get() + DeclTypesBlockStartOffset;
279   }
280 };
281 
282 // The unaligned decl ID used in the Blobs of bistreams.
283 using unaligned_decl_id_t =
284     llvm::support::detail::packed_endian_specific_integral<
285         serialization::DeclID, llvm::endianness::native,
286         llvm::support::unaligned>;
287 
288 /// The number of predefined preprocessed entity IDs.
289 const unsigned int NUM_PREDEF_PP_ENTITY_IDS = 1;
290 
291 /// Describes the various kinds of blocks that occur within
292 /// an AST file.
293 enum BlockIDs {
294   /// The AST block, which acts as a container around the
295   /// full AST block.
296   AST_BLOCK_ID = llvm::bitc::FIRST_APPLICATION_BLOCKID,
297 
298   /// The block containing information about the source
299   /// manager.
300   SOURCE_MANAGER_BLOCK_ID,
301 
302   /// The block containing information about the
303   /// preprocessor.
304   PREPROCESSOR_BLOCK_ID,
305 
306   /// The block containing the definitions of all of the
307   /// types and decls used within the AST file.
308   DECLTYPES_BLOCK_ID,
309 
310   /// The block containing the detailed preprocessing record.
311   PREPROCESSOR_DETAIL_BLOCK_ID,
312 
313   /// The block containing the submodule structure.
314   SUBMODULE_BLOCK_ID,
315 
316   /// The block containing comments.
317   COMMENTS_BLOCK_ID,
318 
319   /// The control block, which contains all of the
320   /// information that needs to be validated prior to committing
321   /// to loading the AST file.
322   CONTROL_BLOCK_ID,
323 
324   /// The block of input files, which were used as inputs
325   /// to create this AST file.
326   ///
327   /// This block is part of the control block.
328   INPUT_FILES_BLOCK_ID,
329 
330   /// The block of configuration options, used to check that
331   /// a module is being used in a configuration compatible with the
332   /// configuration in which it was built.
333   ///
334   /// This block is part of the control block.
335   OPTIONS_BLOCK_ID,
336 
337   /// A block containing a module file extension.
338   EXTENSION_BLOCK_ID,
339 
340   /// A block with unhashed content.
341   ///
342   /// These records should not change the \a ASTFileSignature.  See \a
343   /// UnhashedControlBlockRecordTypes for the list of records.
344   UNHASHED_CONTROL_BLOCK_ID,
345 };
346 
347 /// Record types that occur within the control block.
348 enum ControlRecordTypes {
349   /// AST file metadata, including the AST file version number
350   /// and information about the compiler used to build this AST file.
351   METADATA = 1,
352 
353   /// Record code for the list of other AST files imported by
354   /// this AST file.
355   IMPORTS,
356 
357   /// Record code for the original file that was used to
358   /// generate the AST file, including both its file ID and its
359   /// name.
360   ORIGINAL_FILE,
361 
362   /// Record code for file ID of the file or buffer that was used to
363   /// generate the AST file.
364   ORIGINAL_FILE_ID,
365 
366   /// Offsets into the input-files block where input files
367   /// reside.
368   INPUT_FILE_OFFSETS,
369 
370   /// Record code for the module name.
371   MODULE_NAME,
372 
373   /// Record code for the module map file that was used to build this
374   /// AST file.
375   MODULE_MAP_FILE,
376 
377   /// Record code for the module build directory.
378   MODULE_DIRECTORY,
379 };
380 
381 /// Record types that occur within the options block inside
382 /// the control block.
383 enum OptionsRecordTypes {
384   /// Record code for the language options table.
385   ///
386   /// The record with this code contains the contents of the
387   /// LangOptions structure. We serialize the entire contents of
388   /// the structure, and let the reader decide which options are
389   /// actually important to check.
390   LANGUAGE_OPTIONS = 1,
391 
392   /// Record code for the target options table.
393   TARGET_OPTIONS,
394 
395   /// Record code for the filesystem options table.
396   FILE_SYSTEM_OPTIONS,
397 
398   /// Record code for the headers search options table.
399   HEADER_SEARCH_OPTIONS,
400 
401   /// Record code for the preprocessor options table.
402   PREPROCESSOR_OPTIONS,
403 };
404 
405 /// Record codes for the unhashed control block.
406 enum UnhashedControlBlockRecordTypes {
407   /// Record code for the signature that identifiers this AST file.
408   SIGNATURE = 1,
409 
410   /// Record code for the content hash of the AST block.
411   AST_BLOCK_HASH,
412 
413   /// Record code for the diagnostic options table.
414   DIAGNOSTIC_OPTIONS,
415 
416   /// Record code for the headers search paths.
417   HEADER_SEARCH_PATHS,
418 
419   /// Record code for \#pragma diagnostic mappings.
420   DIAG_PRAGMA_MAPPINGS,
421 
422   /// Record code for the indices of used header search entries.
423   HEADER_SEARCH_ENTRY_USAGE,
424 
425   /// Record code for the indices of used VFSs.
426   VFS_USAGE,
427 };
428 
429 /// Record code for extension blocks.
430 enum ExtensionBlockRecordTypes {
431   /// Metadata describing this particular extension.
432   EXTENSION_METADATA = 1,
433 
434   /// The first record ID allocated to the extensions themselves.
435   FIRST_EXTENSION_RECORD_ID = 4
436 };
437 
438 /// Record types that occur within the input-files block
439 /// inside the control block.
440 enum InputFileRecordTypes {
441   /// An input file.
442   INPUT_FILE = 1,
443 
444   /// The input file content hash
445   INPUT_FILE_HASH
446 };
447 
448 /// Record types that occur within the AST block itself.
449 enum ASTRecordTypes {
450   /// Record code for the offsets of each type.
451   ///
452   /// The TYPE_OFFSET constant describes the record that occurs
453   /// within the AST block. The record itself is an array of offsets that
454   /// point into the declarations and types block (identified by
455   /// DECLTYPES_BLOCK_ID). The index into the array is based on the ID
456   /// of a type. For a given type ID @c T, the lower three bits of
457   /// @c T are its qualifiers (const, volatile, restrict), as in
458   /// the QualType class. The upper bits, after being shifted and
459   /// subtracting NUM_PREDEF_TYPE_IDS, are used to index into the
460   /// TYPE_OFFSET block to determine the offset of that type's
461   /// corresponding record within the DECLTYPES_BLOCK_ID block.
462   TYPE_OFFSET = 1,
463 
464   /// Record code for the offsets of each decl.
465   ///
466   /// The DECL_OFFSET constant describes the record that occurs
467   /// within the block identified by DECL_OFFSETS_BLOCK_ID within
468   /// the AST block. The record itself is an array of offsets that
469   /// point into the declarations and types block (identified by
470   /// DECLTYPES_BLOCK_ID). The declaration ID is an index into this
471   /// record, after subtracting one to account for the use of
472   /// declaration ID 0 for a NULL declaration pointer. Index 0 is
473   /// reserved for the translation unit declaration.
474   DECL_OFFSET = 2,
475 
476   /// Record code for the table of offsets of each
477   /// identifier ID.
478   ///
479   /// The offset table contains offsets into the blob stored in
480   /// the IDENTIFIER_TABLE record. Each offset points to the
481   /// NULL-terminated string that corresponds to that identifier.
482   IDENTIFIER_OFFSET = 3,
483 
484   /// This is so that older clang versions, before the introduction
485   /// of the control block, can read and reject the newer PCH format.
486   /// *DON'T CHANGE THIS NUMBER*.
487   METADATA_OLD_FORMAT = 4,
488 
489   /// Record code for the identifier table.
490   ///
491   /// The identifier table is a simple blob that contains
492   /// NULL-terminated strings for all of the identifiers
493   /// referenced by the AST file. The IDENTIFIER_OFFSET table
494   /// contains the mapping from identifier IDs to the characters
495   /// in this blob. Note that the starting offsets of all of the
496   /// identifiers are odd, so that, when the identifier offset
497   /// table is loaded in, we can use the low bit to distinguish
498   /// between offsets (for unresolved identifier IDs) and
499   /// IdentifierInfo pointers (for already-resolved identifier
500   /// IDs).
501   IDENTIFIER_TABLE = 5,
502 
503   /// Record code for the array of eagerly deserialized decls.
504   ///
505   /// The AST file contains a list of all of the declarations that should be
506   /// eagerly deserialized present within the parsed headers, stored as an
507   /// array of declaration IDs. These declarations will be
508   /// reported to the AST consumer after the AST file has been
509   /// read, since their presence can affect the semantics of the
510   /// program (e.g., for code generation).
511   EAGERLY_DESERIALIZED_DECLS = 6,
512 
513   /// Record code for the set of non-builtin, special
514   /// types.
515   ///
516   /// This record contains the type IDs for the various type nodes
517   /// that are constructed during semantic analysis (e.g.,
518   /// __builtin_va_list). The SPECIAL_TYPE_* constants provide
519   /// offsets into this record.
520   SPECIAL_TYPES = 7,
521 
522   /// Record code for the extra statistics we gather while
523   /// generating an AST file.
524   STATISTICS = 8,
525 
526   /// Record code for the array of tentative definitions.
527   TENTATIVE_DEFINITIONS = 9,
528 
529   // ID 10 used to be for a list of extern "C" declarations.
530 
531   /// Record code for the table of offsets into the
532   /// Objective-C method pool.
533   SELECTOR_OFFSETS = 11,
534 
535   /// Record code for the Objective-C method pool,
536   METHOD_POOL = 12,
537 
538   /// The value of the next __COUNTER__ to dispense.
539   /// [PP_COUNTER_VALUE, Val]
540   PP_COUNTER_VALUE = 13,
541 
542   /// Record code for the table of offsets into the block
543   /// of source-location information.
544   SOURCE_LOCATION_OFFSETS = 14,
545 
546   // ID 15 used to be for source location entry preloads.
547 
548   /// Record code for the set of ext_vector type names.
549   EXT_VECTOR_DECLS = 16,
550 
551   /// Record code for the array of unused file scoped decls.
552   UNUSED_FILESCOPED_DECLS = 17,
553 
554   /// Record code for the table of offsets to entries in the
555   /// preprocessing record.
556   PPD_ENTITIES_OFFSETS = 18,
557 
558   /// Record code for the array of VTable uses.
559   VTABLE_USES = 19,
560 
561   // ID 20 used to be for a list of dynamic classes.
562 
563   /// Record code for referenced selector pool.
564   REFERENCED_SELECTOR_POOL = 21,
565 
566   /// Record code for an update to the TU's lexically contained
567   /// declarations.
568   TU_UPDATE_LEXICAL = 22,
569 
570   // ID 23 used to be for a list of local redeclarations.
571 
572   /// Record code for declarations that Sema keeps references of.
573   SEMA_DECL_REFS = 24,
574 
575   /// Record code for weak undeclared identifiers.
576   WEAK_UNDECLARED_IDENTIFIERS = 25,
577 
578   /// Record code for pending implicit instantiations.
579   PENDING_IMPLICIT_INSTANTIATIONS = 26,
580 
581   // ID 27 used to be for a list of replacement decls.
582 
583   /// Record code for an update to a decl context's lookup table.
584   ///
585   /// In practice, this should only be used for the TU and namespaces.
586   UPDATE_VISIBLE = 28,
587 
588   /// Record for offsets of DECL_UPDATES records for declarations
589   /// that were modified after being deserialized and need updates.
590   DECL_UPDATE_OFFSETS = 29,
591 
592   // ID 30 used to be a decl update record. These are now in the DECLTYPES
593   // block.
594 
595   // ID 31 used to be a list of offsets to DECL_CXX_BASE_SPECIFIERS records.
596 
597   // ID 32 used to be the code for \#pragma diagnostic mappings.
598 
599   /// Record code for special CUDA declarations.
600   CUDA_SPECIAL_DECL_REFS = 33,
601 
602   /// Record code for header search information.
603   HEADER_SEARCH_TABLE = 34,
604 
605   /// Record code for floating point \#pragma options.
606   FP_PRAGMA_OPTIONS = 35,
607 
608   /// Record code for enabled OpenCL extensions.
609   OPENCL_EXTENSIONS = 36,
610 
611   /// The list of delegating constructor declarations.
612   DELEGATING_CTORS = 37,
613 
614   /// Record code for the set of known namespaces, which are used
615   /// for typo correction.
616   KNOWN_NAMESPACES = 38,
617 
618   /// Record code for the remapping information used to relate
619   /// loaded modules to the various offsets and IDs(e.g., source location
620   /// offests, declaration and type IDs) that are used in that module to
621   /// refer to other modules.
622   MODULE_OFFSET_MAP = 39,
623 
624   /// Record code for the source manager line table information,
625   /// which stores information about \#line directives.
626   SOURCE_MANAGER_LINE_TABLE = 40,
627 
628   /// Record code for map of Objective-C class definition IDs to the
629   /// ObjC categories in a module that are attached to that class.
630   OBJC_CATEGORIES_MAP = 41,
631 
632   /// Record code for a file sorted array of DeclIDs in a module.
633   FILE_SORTED_DECLS = 42,
634 
635   /// Record code for an array of all of the (sub)modules that were
636   /// imported by the AST file.
637   IMPORTED_MODULES = 43,
638 
639   // ID 44 used to be a table of merged canonical declarations.
640   // ID 45 used to be a list of declaration IDs of local redeclarations.
641 
642   /// Record code for the array of Objective-C categories (including
643   /// extensions).
644   ///
645   /// This array can only be interpreted properly using the Objective-C
646   /// categories map.
647   OBJC_CATEGORIES = 46,
648 
649   /// Record code for the table of offsets of each macro ID.
650   ///
651   /// The offset table contains offsets into the blob stored in
652   /// the preprocessor block. Each offset points to the corresponding
653   /// macro definition.
654   MACRO_OFFSET = 47,
655 
656   /// A list of "interesting" identifiers. Only used in C++ (where we
657   /// don't normally do lookups into the serialized identifier table). These
658   /// are eagerly deserialized.
659   INTERESTING_IDENTIFIERS = 48,
660 
661   /// Record code for undefined but used functions and variables that
662   /// need a definition in this TU.
663   UNDEFINED_BUT_USED = 49,
664 
665   /// Record code for late parsed template functions.
666   LATE_PARSED_TEMPLATE = 50,
667 
668   /// Record code for \#pragma optimize options.
669   OPTIMIZE_PRAGMA_OPTIONS = 51,
670 
671   /// Record code for potentially unused local typedef names.
672   UNUSED_LOCAL_TYPEDEF_NAME_CANDIDATES = 52,
673 
674   // ID 53 used to be a table of constructor initializer records.
675 
676   /// Delete expressions that will be analyzed later.
677   DELETE_EXPRS_TO_ANALYZE = 54,
678 
679   /// Record code for \#pragma ms_struct options.
680   MSSTRUCT_PRAGMA_OPTIONS = 55,
681 
682   /// Record code for \#pragma ms_struct options.
683   POINTERS_TO_MEMBERS_PRAGMA_OPTIONS = 56,
684 
685   /// Number of unmatched #pragma clang cuda_force_host_device begin
686   /// directives we've seen.
687   CUDA_PRAGMA_FORCE_HOST_DEVICE_DEPTH = 57,
688 
689   /// Record code for types associated with OpenCL extensions.
690   OPENCL_EXTENSION_TYPES = 58,
691 
692   /// Record code for declarations associated with OpenCL extensions.
693   OPENCL_EXTENSION_DECLS = 59,
694 
695   MODULAR_CODEGEN_DECLS = 60,
696 
697   /// Record code for \#pragma align/pack options.
698   ALIGN_PACK_PRAGMA_OPTIONS = 61,
699 
700   /// The stack of open #ifs/#ifdefs recorded in a preamble.
701   PP_CONDITIONAL_STACK = 62,
702 
703   /// A table of skipped ranges within the preprocessing record.
704   PPD_SKIPPED_RANGES = 63,
705 
706   /// Record code for the Decls to be checked for deferred diags.
707   DECLS_TO_CHECK_FOR_DEFERRED_DIAGS = 64,
708 
709   /// Record code for \#pragma float_control options.
710   FLOAT_CONTROL_PRAGMA_OPTIONS = 65,
711 
712   /// ID 66 used to be the list of included files.
713 
714   /// Record code for an unterminated \#pragma clang assume_nonnull begin
715   /// recorded in a preamble.
716   PP_ASSUME_NONNULL_LOC = 67,
717 
718   /// Record code for lexical and visible block for delayed namespace in
719   /// reduced BMI.
720   DELAYED_NAMESPACE_LEXICAL_VISIBLE_RECORD = 68,
721 
722   /// Record code for \#pragma clang unsafe_buffer_usage begin/end
723   PP_UNSAFE_BUFFER_USAGE = 69,
724 
725   /// Record code for vtables to emit.
726   VTABLES_TO_EMIT = 70,
727 };
728 
729 /// Record types used within a source manager block.
730 enum SourceManagerRecordTypes {
731   /// Describes a source location entry (SLocEntry) for a
732   /// file.
733   SM_SLOC_FILE_ENTRY = 1,
734 
735   /// Describes a source location entry (SLocEntry) for a
736   /// buffer.
737   SM_SLOC_BUFFER_ENTRY = 2,
738 
739   /// Describes a blob that contains the data for a buffer
740   /// entry. This kind of record always directly follows a
741   /// SM_SLOC_BUFFER_ENTRY record or a SM_SLOC_FILE_ENTRY with an
742   /// overridden buffer.
743   SM_SLOC_BUFFER_BLOB = 3,
744 
745   /// Describes a zlib-compressed blob that contains the data for
746   /// a buffer entry.
747   SM_SLOC_BUFFER_BLOB_COMPRESSED = 4,
748 
749   /// Describes a source location entry (SLocEntry) for a
750   /// macro expansion.
751   SM_SLOC_EXPANSION_ENTRY = 5
752 };
753 
754 /// Record types used within a preprocessor block.
755 enum PreprocessorRecordTypes {
756   // The macros in the PP section are a PP_MACRO_* instance followed by a
757   // list of PP_TOKEN instances for each token in the definition.
758 
759   /// An object-like macro definition.
760   /// [PP_MACRO_OBJECT_LIKE, IdentInfoID, SLoc, IsUsed]
761   PP_MACRO_OBJECT_LIKE = 1,
762 
763   /// A function-like macro definition.
764   /// [PP_MACRO_FUNCTION_LIKE, \<ObjectLikeStuff>, IsC99Varargs,
765   /// IsGNUVarars, NumArgs, ArgIdentInfoID* ]
766   PP_MACRO_FUNCTION_LIKE = 2,
767 
768   /// Describes one token.
769   /// [PP_TOKEN, SLoc, Length, IdentInfoID, Kind, Flags]
770   PP_TOKEN = 3,
771 
772   /// The macro directives history for a particular identifier.
773   PP_MACRO_DIRECTIVE_HISTORY = 4,
774 
775   /// A macro directive exported by a module.
776   /// [PP_MODULE_MACRO, SubmoduleID, MacroID, (Overridden SubmoduleID)*]
777   PP_MODULE_MACRO = 5,
778 };
779 
780 /// Record types used within a preprocessor detail block.
781 enum PreprocessorDetailRecordTypes {
782   /// Describes a macro expansion within the preprocessing record.
783   PPD_MACRO_EXPANSION = 0,
784 
785   /// Describes a macro definition within the preprocessing record.
786   PPD_MACRO_DEFINITION = 1,
787 
788   /// Describes an inclusion directive within the preprocessing
789   /// record.
790   PPD_INCLUSION_DIRECTIVE = 2
791 };
792 
793 /// Record types used within a submodule description block.
794 enum SubmoduleRecordTypes {
795   /// Metadata for submodules as a whole.
796   SUBMODULE_METADATA = 0,
797 
798   /// Defines the major attributes of a submodule, including its
799   /// name and parent.
800   SUBMODULE_DEFINITION = 1,
801 
802   /// Specifies the umbrella header used to create this module,
803   /// if any.
804   SUBMODULE_UMBRELLA_HEADER = 2,
805 
806   /// Specifies a header that falls into this (sub)module.
807   SUBMODULE_HEADER = 3,
808 
809   /// Specifies a top-level header that falls into this (sub)module.
810   SUBMODULE_TOPHEADER = 4,
811 
812   /// Specifies an umbrella directory.
813   SUBMODULE_UMBRELLA_DIR = 5,
814 
815   /// Specifies the submodules that are imported by this
816   /// submodule.
817   SUBMODULE_IMPORTS = 6,
818 
819   /// Specifies the submodules that are re-exported from this
820   /// submodule.
821   SUBMODULE_EXPORTS = 7,
822 
823   /// Specifies a required feature.
824   SUBMODULE_REQUIRES = 8,
825 
826   /// Specifies a header that has been explicitly excluded
827   /// from this submodule.
828   SUBMODULE_EXCLUDED_HEADER = 9,
829 
830   /// Specifies a library or framework to link against.
831   SUBMODULE_LINK_LIBRARY = 10,
832 
833   /// Specifies a configuration macro for this module.
834   SUBMODULE_CONFIG_MACRO = 11,
835 
836   /// Specifies a conflict with another module.
837   SUBMODULE_CONFLICT = 12,
838 
839   /// Specifies a header that is private to this submodule.
840   SUBMODULE_PRIVATE_HEADER = 13,
841 
842   /// Specifies a header that is part of the module but must be
843   /// textually included.
844   SUBMODULE_TEXTUAL_HEADER = 14,
845 
846   /// Specifies a header that is private to this submodule but
847   /// must be textually included.
848   SUBMODULE_PRIVATE_TEXTUAL_HEADER = 15,
849 
850   /// Specifies some declarations with initializers that must be
851   /// emitted to initialize the module.
852   SUBMODULE_INITIALIZERS = 16,
853 
854   /// Specifies the name of the module that will eventually
855   /// re-export the entities in this module.
856   SUBMODULE_EXPORT_AS = 17,
857 
858   /// Specifies affecting modules that were not imported.
859   SUBMODULE_AFFECTING_MODULES = 18,
860 };
861 
862 /// Record types used within a comments block.
863 enum CommentRecordTypes { COMMENTS_RAW_COMMENT = 0 };
864 
865 /// \defgroup ASTAST AST file AST constants
866 ///
867 /// The constants in this group describe various components of the
868 /// abstract syntax tree within an AST file.
869 ///
870 /// @{
871 
872 /// Predefined type IDs.
873 ///
874 /// These type IDs correspond to predefined types in the AST
875 /// context, such as built-in types (int) and special place-holder
876 /// types (the \<overload> and \<dependent> type markers). Such
877 /// types are never actually serialized, since they will be built
878 /// by the AST context when it is created.
879 enum PredefinedTypeIDs {
880   /// The NULL type.
881   PREDEF_TYPE_NULL_ID = 0,
882 
883   /// The void type.
884   PREDEF_TYPE_VOID_ID = 1,
885 
886   /// The 'bool' or '_Bool' type.
887   PREDEF_TYPE_BOOL_ID = 2,
888 
889   /// The 'char' type, when it is unsigned.
890   PREDEF_TYPE_CHAR_U_ID = 3,
891 
892   /// The 'unsigned char' type.
893   PREDEF_TYPE_UCHAR_ID = 4,
894 
895   /// The 'unsigned short' type.
896   PREDEF_TYPE_USHORT_ID = 5,
897 
898   /// The 'unsigned int' type.
899   PREDEF_TYPE_UINT_ID = 6,
900 
901   /// The 'unsigned long' type.
902   PREDEF_TYPE_ULONG_ID = 7,
903 
904   /// The 'unsigned long long' type.
905   PREDEF_TYPE_ULONGLONG_ID = 8,
906 
907   /// The 'char' type, when it is signed.
908   PREDEF_TYPE_CHAR_S_ID = 9,
909 
910   /// The 'signed char' type.
911   PREDEF_TYPE_SCHAR_ID = 10,
912 
913   /// The C++ 'wchar_t' type.
914   PREDEF_TYPE_WCHAR_ID = 11,
915 
916   /// The (signed) 'short' type.
917   PREDEF_TYPE_SHORT_ID = 12,
918 
919   /// The (signed) 'int' type.
920   PREDEF_TYPE_INT_ID = 13,
921 
922   /// The (signed) 'long' type.
923   PREDEF_TYPE_LONG_ID = 14,
924 
925   /// The (signed) 'long long' type.
926   PREDEF_TYPE_LONGLONG_ID = 15,
927 
928   /// The 'float' type.
929   PREDEF_TYPE_FLOAT_ID = 16,
930 
931   /// The 'double' type.
932   PREDEF_TYPE_DOUBLE_ID = 17,
933 
934   /// The 'long double' type.
935   PREDEF_TYPE_LONGDOUBLE_ID = 18,
936 
937   /// The placeholder type for overloaded function sets.
938   PREDEF_TYPE_OVERLOAD_ID = 19,
939 
940   /// The placeholder type for dependent types.
941   PREDEF_TYPE_DEPENDENT_ID = 20,
942 
943   /// The '__uint128_t' type.
944   PREDEF_TYPE_UINT128_ID = 21,
945 
946   /// The '__int128_t' type.
947   PREDEF_TYPE_INT128_ID = 22,
948 
949   /// The type of 'nullptr'.
950   PREDEF_TYPE_NULLPTR_ID = 23,
951 
952   /// The C++ 'char16_t' type.
953   PREDEF_TYPE_CHAR16_ID = 24,
954 
955   /// The C++ 'char32_t' type.
956   PREDEF_TYPE_CHAR32_ID = 25,
957 
958   /// The ObjC 'id' type.
959   PREDEF_TYPE_OBJC_ID = 26,
960 
961   /// The ObjC 'Class' type.
962   PREDEF_TYPE_OBJC_CLASS = 27,
963 
964   /// The ObjC 'SEL' type.
965   PREDEF_TYPE_OBJC_SEL = 28,
966 
967   /// The 'unknown any' placeholder type.
968   PREDEF_TYPE_UNKNOWN_ANY = 29,
969 
970   /// The placeholder type for bound member functions.
971   PREDEF_TYPE_BOUND_MEMBER = 30,
972 
973   /// The "auto" deduction type.
974   PREDEF_TYPE_AUTO_DEDUCT = 31,
975 
976   /// The "auto &&" deduction type.
977   PREDEF_TYPE_AUTO_RREF_DEDUCT = 32,
978 
979   /// The OpenCL 'half' / ARM NEON __fp16 type.
980   PREDEF_TYPE_HALF_ID = 33,
981 
982   /// ARC's unbridged-cast placeholder type.
983   PREDEF_TYPE_ARC_UNBRIDGED_CAST = 34,
984 
985   /// The pseudo-object placeholder type.
986   PREDEF_TYPE_PSEUDO_OBJECT = 35,
987 
988   /// The placeholder type for builtin functions.
989   PREDEF_TYPE_BUILTIN_FN = 36,
990 
991   /// OpenCL event type.
992   PREDEF_TYPE_EVENT_ID = 37,
993 
994   /// OpenCL clk event type.
995   PREDEF_TYPE_CLK_EVENT_ID = 38,
996 
997   /// OpenCL sampler type.
998   PREDEF_TYPE_SAMPLER_ID = 39,
999 
1000   /// OpenCL queue type.
1001   PREDEF_TYPE_QUEUE_ID = 40,
1002 
1003   /// OpenCL reserve_id type.
1004   PREDEF_TYPE_RESERVE_ID_ID = 41,
1005 
1006   /// The placeholder type for an array section.
1007   PREDEF_TYPE_ARRAY_SECTION = 42,
1008 
1009   /// The '__float128' type
1010   PREDEF_TYPE_FLOAT128_ID = 43,
1011 
1012   /// The '_Float16' type
1013   PREDEF_TYPE_FLOAT16_ID = 44,
1014 
1015   /// The C++ 'char8_t' type.
1016   PREDEF_TYPE_CHAR8_ID = 45,
1017 
1018   /// \brief The 'short _Accum' type
1019   PREDEF_TYPE_SHORT_ACCUM_ID = 46,
1020 
1021   /// \brief The '_Accum' type
1022   PREDEF_TYPE_ACCUM_ID = 47,
1023 
1024   /// \brief The 'long _Accum' type
1025   PREDEF_TYPE_LONG_ACCUM_ID = 48,
1026 
1027   /// \brief The 'unsigned short _Accum' type
1028   PREDEF_TYPE_USHORT_ACCUM_ID = 49,
1029 
1030   /// \brief The 'unsigned _Accum' type
1031   PREDEF_TYPE_UACCUM_ID = 50,
1032 
1033   /// \brief The 'unsigned long _Accum' type
1034   PREDEF_TYPE_ULONG_ACCUM_ID = 51,
1035 
1036   /// \brief The 'short _Fract' type
1037   PREDEF_TYPE_SHORT_FRACT_ID = 52,
1038 
1039   /// \brief The '_Fract' type
1040   PREDEF_TYPE_FRACT_ID = 53,
1041 
1042   /// \brief The 'long _Fract' type
1043   PREDEF_TYPE_LONG_FRACT_ID = 54,
1044 
1045   /// \brief The 'unsigned short _Fract' type
1046   PREDEF_TYPE_USHORT_FRACT_ID = 55,
1047 
1048   /// \brief The 'unsigned _Fract' type
1049   PREDEF_TYPE_UFRACT_ID = 56,
1050 
1051   /// \brief The 'unsigned long _Fract' type
1052   PREDEF_TYPE_ULONG_FRACT_ID = 57,
1053 
1054   /// \brief The '_Sat short _Accum' type
1055   PREDEF_TYPE_SAT_SHORT_ACCUM_ID = 58,
1056 
1057   /// \brief The '_Sat _Accum' type
1058   PREDEF_TYPE_SAT_ACCUM_ID = 59,
1059 
1060   /// \brief The '_Sat long _Accum' type
1061   PREDEF_TYPE_SAT_LONG_ACCUM_ID = 60,
1062 
1063   /// \brief The '_Sat unsigned short _Accum' type
1064   PREDEF_TYPE_SAT_USHORT_ACCUM_ID = 61,
1065 
1066   /// \brief The '_Sat unsigned _Accum' type
1067   PREDEF_TYPE_SAT_UACCUM_ID = 62,
1068 
1069   /// \brief The '_Sat unsigned long _Accum' type
1070   PREDEF_TYPE_SAT_ULONG_ACCUM_ID = 63,
1071 
1072   /// \brief The '_Sat short _Fract' type
1073   PREDEF_TYPE_SAT_SHORT_FRACT_ID = 64,
1074 
1075   /// \brief The '_Sat _Fract' type
1076   PREDEF_TYPE_SAT_FRACT_ID = 65,
1077 
1078   /// \brief The '_Sat long _Fract' type
1079   PREDEF_TYPE_SAT_LONG_FRACT_ID = 66,
1080 
1081   /// \brief The '_Sat unsigned short _Fract' type
1082   PREDEF_TYPE_SAT_USHORT_FRACT_ID = 67,
1083 
1084   /// \brief The '_Sat unsigned _Fract' type
1085   PREDEF_TYPE_SAT_UFRACT_ID = 68,
1086 
1087   /// \brief The '_Sat unsigned long _Fract' type
1088   PREDEF_TYPE_SAT_ULONG_FRACT_ID = 69,
1089 
1090   /// The placeholder type for OpenMP array shaping operation.
1091   PREDEF_TYPE_OMP_ARRAY_SHAPING = 70,
1092 
1093   /// The placeholder type for OpenMP iterator expression.
1094   PREDEF_TYPE_OMP_ITERATOR = 71,
1095 
1096   /// A placeholder type for incomplete matrix index operations.
1097   PREDEF_TYPE_INCOMPLETE_MATRIX_IDX = 72,
1098 
1099   /// \brief The '__bf16' type
1100   PREDEF_TYPE_BFLOAT16_ID = 73,
1101 
1102   /// \brief The '__ibm128' type
1103   PREDEF_TYPE_IBM128_ID = 74,
1104 
1105 /// OpenCL image types with auto numeration
1106 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix)                   \
1107   PREDEF_TYPE_##Id##_ID,
1108 #include "clang/Basic/OpenCLImageTypes.def"
1109 /// \brief OpenCL extension types with auto numeration
1110 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) PREDEF_TYPE_##Id##_ID,
1111 #include "clang/Basic/OpenCLExtensionTypes.def"
1112 // \brief SVE types with auto numeration
1113 #define SVE_TYPE(Name, Id, SingletonId) PREDEF_TYPE_##Id##_ID,
1114 #include "clang/Basic/AArch64SVEACLETypes.def"
1115 // \brief  PowerPC MMA types with auto numeration
1116 #define PPC_VECTOR_TYPE(Name, Id, Size) PREDEF_TYPE_##Id##_ID,
1117 #include "clang/Basic/PPCTypes.def"
1118 // \brief RISC-V V types with auto numeration
1119 #define RVV_TYPE(Name, Id, SingletonId) PREDEF_TYPE_##Id##_ID,
1120 #include "clang/Basic/RISCVVTypes.def"
1121 // \brief WebAssembly reference types with auto numeration
1122 #define WASM_TYPE(Name, Id, SingletonId) PREDEF_TYPE_##Id##_ID,
1123 #include "clang/Basic/WebAssemblyReferenceTypes.def"
1124 // \brief AMDGPU types with auto numeration
1125 #define AMDGPU_TYPE(Name, Id, SingletonId) PREDEF_TYPE_##Id##_ID,
1126 #include "clang/Basic/AMDGPUTypes.def"
1127 
1128   /// The placeholder type for unresolved templates.
1129   PREDEF_TYPE_UNRESOLVED_TEMPLATE,
1130   // Sentinel value. Considered a predefined type but not useable as one.
1131   PREDEF_TYPE_LAST_ID
1132 };
1133 
1134 /// The number of predefined type IDs that are reserved for
1135 /// the PREDEF_TYPE_* constants.
1136 ///
1137 /// Type IDs for non-predefined types will start at
1138 /// NUM_PREDEF_TYPE_IDs.
1139 const unsigned NUM_PREDEF_TYPE_IDS = 504;
1140 
1141 // Ensure we do not overrun the predefined types we reserved
1142 // in the enum PredefinedTypeIDs above.
1143 static_assert(PREDEF_TYPE_LAST_ID < NUM_PREDEF_TYPE_IDS,
1144               "Too many enumerators in PredefinedTypeIDs. Review the value of "
1145               "NUM_PREDEF_TYPE_IDS");
1146 
1147 /// Record codes for each kind of type.
1148 ///
1149 /// These constants describe the type records that can occur within a
1150 /// block identified by DECLTYPES_BLOCK_ID in the AST file. Each
1151 /// constant describes a record for a specific type class in the
1152 /// AST. Note that DeclCode values share this code space.
1153 enum TypeCode {
1154 #define TYPE_BIT_CODE(CLASS_ID, CODE_ID, CODE_VALUE)                           \
1155   TYPE_##CODE_ID = CODE_VALUE,
1156 #include "clang/Serialization/TypeBitCodes.def"
1157 
1158   /// An ExtQualType record.
1159   TYPE_EXT_QUAL = 1
1160 };
1161 
1162 /// The type IDs for special types constructed by semantic
1163 /// analysis.
1164 ///
1165 /// The constants in this enumeration are indices into the
1166 /// SPECIAL_TYPES record.
1167 enum SpecialTypeIDs {
1168   /// CFConstantString type
1169   SPECIAL_TYPE_CF_CONSTANT_STRING = 0,
1170 
1171   /// C FILE typedef type
1172   SPECIAL_TYPE_FILE = 1,
1173 
1174   /// C jmp_buf typedef type
1175   SPECIAL_TYPE_JMP_BUF = 2,
1176 
1177   /// C sigjmp_buf typedef type
1178   SPECIAL_TYPE_SIGJMP_BUF = 3,
1179 
1180   /// Objective-C "id" redefinition type
1181   SPECIAL_TYPE_OBJC_ID_REDEFINITION = 4,
1182 
1183   /// Objective-C "Class" redefinition type
1184   SPECIAL_TYPE_OBJC_CLASS_REDEFINITION = 5,
1185 
1186   /// Objective-C "SEL" redefinition type
1187   SPECIAL_TYPE_OBJC_SEL_REDEFINITION = 6,
1188 
1189   /// C ucontext_t typedef type
1190   SPECIAL_TYPE_UCONTEXT_T = 7
1191 };
1192 
1193 /// The number of special type IDs.
1194 const unsigned NumSpecialTypeIDs = 8;
1195 
1196 /// Record of updates for a declaration that was modified after
1197 /// being deserialized. This can occur within DECLTYPES_BLOCK_ID.
1198 const unsigned int DECL_UPDATES = 49;
1199 
1200 /// Record code for a list of local redeclarations of a declaration.
1201 /// This can occur within DECLTYPES_BLOCK_ID.
1202 const unsigned int LOCAL_REDECLARATIONS = 50;
1203 
1204 /// Record codes for each kind of declaration.
1205 ///
1206 /// These constants describe the declaration records that can occur within
1207 /// a declarations block (identified by DECLTYPES_BLOCK_ID). Each
1208 /// constant describes a record for a specific declaration class
1209 /// in the AST. Note that TypeCode values share this code space.
1210 enum DeclCode {
1211   /// A TypedefDecl record.
1212   DECL_TYPEDEF = 51,
1213   /// A TypeAliasDecl record.
1214 
1215   DECL_TYPEALIAS,
1216 
1217   /// An EnumDecl record.
1218   DECL_ENUM,
1219 
1220   /// A RecordDecl record.
1221   DECL_RECORD,
1222 
1223   /// An EnumConstantDecl record.
1224   DECL_ENUM_CONSTANT,
1225 
1226   /// A FunctionDecl record.
1227   DECL_FUNCTION,
1228 
1229   /// A ObjCMethodDecl record.
1230   DECL_OBJC_METHOD,
1231 
1232   /// A ObjCInterfaceDecl record.
1233   DECL_OBJC_INTERFACE,
1234 
1235   /// A ObjCProtocolDecl record.
1236   DECL_OBJC_PROTOCOL,
1237 
1238   /// A ObjCIvarDecl record.
1239   DECL_OBJC_IVAR,
1240 
1241   /// A ObjCAtDefsFieldDecl record.
1242   DECL_OBJC_AT_DEFS_FIELD,
1243 
1244   /// A ObjCCategoryDecl record.
1245   DECL_OBJC_CATEGORY,
1246 
1247   /// A ObjCCategoryImplDecl record.
1248   DECL_OBJC_CATEGORY_IMPL,
1249 
1250   /// A ObjCImplementationDecl record.
1251   DECL_OBJC_IMPLEMENTATION,
1252 
1253   /// A ObjCCompatibleAliasDecl record.
1254   DECL_OBJC_COMPATIBLE_ALIAS,
1255 
1256   /// A ObjCPropertyDecl record.
1257   DECL_OBJC_PROPERTY,
1258 
1259   /// A ObjCPropertyImplDecl record.
1260   DECL_OBJC_PROPERTY_IMPL,
1261 
1262   /// A FieldDecl record.
1263   DECL_FIELD,
1264 
1265   /// A MSPropertyDecl record.
1266   DECL_MS_PROPERTY,
1267 
1268   /// A MSGuidDecl record.
1269   DECL_MS_GUID,
1270 
1271   /// A TemplateParamObjectDecl record.
1272   DECL_TEMPLATE_PARAM_OBJECT,
1273 
1274   /// A VarDecl record.
1275   DECL_VAR,
1276 
1277   /// An ImplicitParamDecl record.
1278   DECL_IMPLICIT_PARAM,
1279 
1280   /// A ParmVarDecl record.
1281   DECL_PARM_VAR,
1282 
1283   /// A DecompositionDecl record.
1284   DECL_DECOMPOSITION,
1285 
1286   /// A BindingDecl record.
1287   DECL_BINDING,
1288 
1289   /// A FileScopeAsmDecl record.
1290   DECL_FILE_SCOPE_ASM,
1291 
1292   /// A TopLevelStmtDecl record.
1293   DECL_TOP_LEVEL_STMT_DECL,
1294 
1295   /// A BlockDecl record.
1296   DECL_BLOCK,
1297 
1298   /// A CapturedDecl record.
1299   DECL_CAPTURED,
1300 
1301   /// A record that stores the set of declarations that are
1302   /// lexically stored within a given DeclContext.
1303   ///
1304   /// The record itself is a blob that is an array of declaration IDs,
1305   /// in the order in which those declarations were added to the
1306   /// declaration context. This data is used when iterating over
1307   /// the contents of a DeclContext, e.g., via
1308   /// DeclContext::decls_begin() and DeclContext::decls_end().
1309   DECL_CONTEXT_LEXICAL,
1310 
1311   /// A record that stores the set of declarations that are
1312   /// visible from a given DeclContext.
1313   ///
1314   /// The record itself stores a set of mappings, each of which
1315   /// associates a declaration name with one or more declaration
1316   /// IDs. This data is used when performing qualified name lookup
1317   /// into a DeclContext via DeclContext::lookup.
1318   DECL_CONTEXT_VISIBLE,
1319 
1320   /// A LabelDecl record.
1321   DECL_LABEL,
1322 
1323   /// A NamespaceDecl record.
1324   DECL_NAMESPACE,
1325 
1326   /// A NamespaceAliasDecl record.
1327   DECL_NAMESPACE_ALIAS,
1328 
1329   /// A UsingDecl record.
1330   DECL_USING,
1331 
1332   /// A UsingEnumDecl record.
1333   DECL_USING_ENUM,
1334 
1335   /// A UsingPackDecl record.
1336   DECL_USING_PACK,
1337 
1338   /// A UsingShadowDecl record.
1339   DECL_USING_SHADOW,
1340 
1341   /// A ConstructorUsingShadowDecl record.
1342   DECL_CONSTRUCTOR_USING_SHADOW,
1343 
1344   /// A UsingDirecitveDecl record.
1345   DECL_USING_DIRECTIVE,
1346 
1347   /// An UnresolvedUsingValueDecl record.
1348   DECL_UNRESOLVED_USING_VALUE,
1349 
1350   /// An UnresolvedUsingTypenameDecl record.
1351   DECL_UNRESOLVED_USING_TYPENAME,
1352 
1353   /// A LinkageSpecDecl record.
1354   DECL_LINKAGE_SPEC,
1355 
1356   /// An ExportDecl record.
1357   DECL_EXPORT,
1358 
1359   /// A CXXRecordDecl record.
1360   DECL_CXX_RECORD,
1361 
1362   /// A CXXDeductionGuideDecl record.
1363   DECL_CXX_DEDUCTION_GUIDE,
1364 
1365   /// A CXXMethodDecl record.
1366   DECL_CXX_METHOD,
1367 
1368   /// A CXXConstructorDecl record.
1369   DECL_CXX_CONSTRUCTOR,
1370 
1371   /// A CXXDestructorDecl record.
1372   DECL_CXX_DESTRUCTOR,
1373 
1374   /// A CXXConversionDecl record.
1375   DECL_CXX_CONVERSION,
1376 
1377   /// An AccessSpecDecl record.
1378   DECL_ACCESS_SPEC,
1379 
1380   /// A FriendDecl record.
1381   DECL_FRIEND,
1382 
1383   /// A FriendTemplateDecl record.
1384   DECL_FRIEND_TEMPLATE,
1385 
1386   /// A ClassTemplateDecl record.
1387   DECL_CLASS_TEMPLATE,
1388 
1389   /// A ClassTemplateSpecializationDecl record.
1390   DECL_CLASS_TEMPLATE_SPECIALIZATION,
1391 
1392   /// A ClassTemplatePartialSpecializationDecl record.
1393   DECL_CLASS_TEMPLATE_PARTIAL_SPECIALIZATION,
1394 
1395   /// A VarTemplateDecl record.
1396   DECL_VAR_TEMPLATE,
1397 
1398   /// A VarTemplateSpecializationDecl record.
1399   DECL_VAR_TEMPLATE_SPECIALIZATION,
1400 
1401   /// A VarTemplatePartialSpecializationDecl record.
1402   DECL_VAR_TEMPLATE_PARTIAL_SPECIALIZATION,
1403 
1404   /// A FunctionTemplateDecl record.
1405   DECL_FUNCTION_TEMPLATE,
1406 
1407   /// A TemplateTypeParmDecl record.
1408   DECL_TEMPLATE_TYPE_PARM,
1409 
1410   /// A NonTypeTemplateParmDecl record.
1411   DECL_NON_TYPE_TEMPLATE_PARM,
1412 
1413   /// A TemplateTemplateParmDecl record.
1414   DECL_TEMPLATE_TEMPLATE_PARM,
1415 
1416   /// A TypeAliasTemplateDecl record.
1417   DECL_TYPE_ALIAS_TEMPLATE,
1418 
1419   /// \brief A ConceptDecl record.
1420   DECL_CONCEPT,
1421 
1422   /// An UnresolvedUsingIfExistsDecl record.
1423   DECL_UNRESOLVED_USING_IF_EXISTS,
1424 
1425   /// \brief A StaticAssertDecl record.
1426   DECL_STATIC_ASSERT,
1427 
1428   /// A record containing CXXBaseSpecifiers.
1429   DECL_CXX_BASE_SPECIFIERS,
1430 
1431   /// A record containing CXXCtorInitializers.
1432   DECL_CXX_CTOR_INITIALIZERS,
1433 
1434   /// A IndirectFieldDecl record.
1435   DECL_INDIRECTFIELD,
1436 
1437   /// A NonTypeTemplateParmDecl record that stores an expanded
1438   /// non-type template parameter pack.
1439   DECL_EXPANDED_NON_TYPE_TEMPLATE_PARM_PACK,
1440 
1441   /// A TemplateTemplateParmDecl record that stores an expanded
1442   /// template template parameter pack.
1443   DECL_EXPANDED_TEMPLATE_TEMPLATE_PARM_PACK,
1444 
1445   /// An ImportDecl recording a module import.
1446   DECL_IMPORT,
1447 
1448   /// An OMPThreadPrivateDecl record.
1449   DECL_OMP_THREADPRIVATE,
1450 
1451   /// An OMPRequiresDecl record.
1452   DECL_OMP_REQUIRES,
1453 
1454   /// An OMPAllocateDcl record.
1455   DECL_OMP_ALLOCATE,
1456 
1457   /// An EmptyDecl record.
1458   DECL_EMPTY,
1459 
1460   /// An LifetimeExtendedTemporaryDecl record.
1461   DECL_LIFETIME_EXTENDED_TEMPORARY,
1462 
1463   /// A RequiresExprBodyDecl record.
1464   DECL_REQUIRES_EXPR_BODY,
1465 
1466   /// An ObjCTypeParamDecl record.
1467   DECL_OBJC_TYPE_PARAM,
1468 
1469   /// An OMPCapturedExprDecl record.
1470   DECL_OMP_CAPTUREDEXPR,
1471 
1472   /// A PragmaCommentDecl record.
1473   DECL_PRAGMA_COMMENT,
1474 
1475   /// A PragmaDetectMismatchDecl record.
1476   DECL_PRAGMA_DETECT_MISMATCH,
1477 
1478   /// An OMPDeclareMapperDecl record.
1479   DECL_OMP_DECLARE_MAPPER,
1480 
1481   /// An OMPDeclareReductionDecl record.
1482   DECL_OMP_DECLARE_REDUCTION,
1483 
1484   /// A UnnamedGlobalConstantDecl record.
1485   DECL_UNNAMED_GLOBAL_CONSTANT,
1486 
1487   /// A HLSLBufferDecl record.
1488   DECL_HLSL_BUFFER,
1489 
1490   /// An ImplicitConceptSpecializationDecl record.
1491   DECL_IMPLICIT_CONCEPT_SPECIALIZATION,
1492 
1493   DECL_LAST = DECL_IMPLICIT_CONCEPT_SPECIALIZATION
1494 };
1495 
1496 /// Record codes for each kind of statement or expression.
1497 ///
1498 /// These constants describe the records that describe statements
1499 /// or expressions. These records  occur within type and declarations
1500 /// block, so they begin with record values of 128.  Each constant
1501 /// describes a record for a specific statement or expression class in the
1502 /// AST.
1503 enum StmtCode {
1504   /// A marker record that indicates that we are at the end
1505   /// of an expression.
1506   STMT_STOP = DECL_LAST + 1,
1507 
1508   /// A NULL expression.
1509   STMT_NULL_PTR,
1510 
1511   /// A reference to a previously [de]serialized Stmt record.
1512   STMT_REF_PTR,
1513 
1514   /// A NullStmt record.
1515   STMT_NULL,
1516 
1517   /// A CompoundStmt record.
1518   STMT_COMPOUND,
1519 
1520   /// A CaseStmt record.
1521   STMT_CASE,
1522 
1523   /// A DefaultStmt record.
1524   STMT_DEFAULT,
1525 
1526   /// A LabelStmt record.
1527   STMT_LABEL,
1528 
1529   /// An AttributedStmt record.
1530   STMT_ATTRIBUTED,
1531 
1532   /// An IfStmt record.
1533   STMT_IF,
1534 
1535   /// A SwitchStmt record.
1536   STMT_SWITCH,
1537 
1538   /// A WhileStmt record.
1539   STMT_WHILE,
1540 
1541   /// A DoStmt record.
1542   STMT_DO,
1543 
1544   /// A ForStmt record.
1545   STMT_FOR,
1546 
1547   /// A GotoStmt record.
1548   STMT_GOTO,
1549 
1550   /// An IndirectGotoStmt record.
1551   STMT_INDIRECT_GOTO,
1552 
1553   /// A ContinueStmt record.
1554   STMT_CONTINUE,
1555 
1556   /// A BreakStmt record.
1557   STMT_BREAK,
1558 
1559   /// A ReturnStmt record.
1560   STMT_RETURN,
1561 
1562   /// A DeclStmt record.
1563   STMT_DECL,
1564 
1565   /// A CapturedStmt record.
1566   STMT_CAPTURED,
1567 
1568   /// A GCC-style AsmStmt record.
1569   STMT_GCCASM,
1570 
1571   /// A MS-style AsmStmt record.
1572   STMT_MSASM,
1573 
1574   /// A constant expression context.
1575   EXPR_CONSTANT,
1576 
1577   /// A PredefinedExpr record.
1578   EXPR_PREDEFINED,
1579 
1580   /// A DeclRefExpr record.
1581   EXPR_DECL_REF,
1582 
1583   /// An IntegerLiteral record.
1584   EXPR_INTEGER_LITERAL,
1585 
1586   /// A FloatingLiteral record.
1587   EXPR_FLOATING_LITERAL,
1588 
1589   /// An ImaginaryLiteral record.
1590   EXPR_IMAGINARY_LITERAL,
1591 
1592   /// A StringLiteral record.
1593   EXPR_STRING_LITERAL,
1594 
1595   /// A CharacterLiteral record.
1596   EXPR_CHARACTER_LITERAL,
1597 
1598   /// A ParenExpr record.
1599   EXPR_PAREN,
1600 
1601   /// A ParenListExpr record.
1602   EXPR_PAREN_LIST,
1603 
1604   /// A UnaryOperator record.
1605   EXPR_UNARY_OPERATOR,
1606 
1607   /// An OffsetOfExpr record.
1608   EXPR_OFFSETOF,
1609 
1610   /// A SizefAlignOfExpr record.
1611   EXPR_SIZEOF_ALIGN_OF,
1612 
1613   /// An ArraySubscriptExpr record.
1614   EXPR_ARRAY_SUBSCRIPT,
1615 
1616   /// An MatrixSubscriptExpr record.
1617   EXPR_MATRIX_SUBSCRIPT,
1618 
1619   /// A CallExpr record.
1620   EXPR_CALL,
1621 
1622   /// A MemberExpr record.
1623   EXPR_MEMBER,
1624 
1625   /// A BinaryOperator record.
1626   EXPR_BINARY_OPERATOR,
1627 
1628   /// A CompoundAssignOperator record.
1629   EXPR_COMPOUND_ASSIGN_OPERATOR,
1630 
1631   /// A ConditionOperator record.
1632   EXPR_CONDITIONAL_OPERATOR,
1633 
1634   /// An ImplicitCastExpr record.
1635   EXPR_IMPLICIT_CAST,
1636 
1637   /// A CStyleCastExpr record.
1638   EXPR_CSTYLE_CAST,
1639 
1640   /// A CompoundLiteralExpr record.
1641   EXPR_COMPOUND_LITERAL,
1642 
1643   /// An ExtVectorElementExpr record.
1644   EXPR_EXT_VECTOR_ELEMENT,
1645 
1646   /// An InitListExpr record.
1647   EXPR_INIT_LIST,
1648 
1649   /// A DesignatedInitExpr record.
1650   EXPR_DESIGNATED_INIT,
1651 
1652   /// A DesignatedInitUpdateExpr record.
1653   EXPR_DESIGNATED_INIT_UPDATE,
1654 
1655   /// An NoInitExpr record.
1656   EXPR_NO_INIT,
1657 
1658   /// An ArrayInitLoopExpr record.
1659   EXPR_ARRAY_INIT_LOOP,
1660 
1661   /// An ArrayInitIndexExpr record.
1662   EXPR_ARRAY_INIT_INDEX,
1663 
1664   /// An ImplicitValueInitExpr record.
1665   EXPR_IMPLICIT_VALUE_INIT,
1666 
1667   /// A VAArgExpr record.
1668   EXPR_VA_ARG,
1669 
1670   /// An AddrLabelExpr record.
1671   EXPR_ADDR_LABEL,
1672 
1673   /// A StmtExpr record.
1674   EXPR_STMT,
1675 
1676   /// A ChooseExpr record.
1677   EXPR_CHOOSE,
1678 
1679   /// A GNUNullExpr record.
1680   EXPR_GNU_NULL,
1681 
1682   /// A SourceLocExpr record.
1683   EXPR_SOURCE_LOC,
1684 
1685   /// A EmbedExpr record.
1686   EXPR_BUILTIN_PP_EMBED,
1687 
1688   /// A ShuffleVectorExpr record.
1689   EXPR_SHUFFLE_VECTOR,
1690 
1691   /// A ConvertVectorExpr record.
1692   EXPR_CONVERT_VECTOR,
1693 
1694   /// BlockExpr
1695   EXPR_BLOCK,
1696 
1697   /// A GenericSelectionExpr record.
1698   EXPR_GENERIC_SELECTION,
1699 
1700   /// A PseudoObjectExpr record.
1701   EXPR_PSEUDO_OBJECT,
1702 
1703   /// An AtomicExpr record.
1704   EXPR_ATOMIC,
1705 
1706   /// A RecoveryExpr record.
1707   EXPR_RECOVERY,
1708 
1709   // Objective-C
1710 
1711   /// An ObjCStringLiteral record.
1712   EXPR_OBJC_STRING_LITERAL,
1713 
1714   EXPR_OBJC_BOXED_EXPRESSION,
1715   EXPR_OBJC_ARRAY_LITERAL,
1716   EXPR_OBJC_DICTIONARY_LITERAL,
1717 
1718   /// An ObjCEncodeExpr record.
1719   EXPR_OBJC_ENCODE,
1720 
1721   /// An ObjCSelectorExpr record.
1722   EXPR_OBJC_SELECTOR_EXPR,
1723 
1724   /// An ObjCProtocolExpr record.
1725   EXPR_OBJC_PROTOCOL_EXPR,
1726 
1727   /// An ObjCIvarRefExpr record.
1728   EXPR_OBJC_IVAR_REF_EXPR,
1729 
1730   /// An ObjCPropertyRefExpr record.
1731   EXPR_OBJC_PROPERTY_REF_EXPR,
1732 
1733   /// An ObjCSubscriptRefExpr record.
1734   EXPR_OBJC_SUBSCRIPT_REF_EXPR,
1735 
1736   /// UNUSED
1737   EXPR_OBJC_KVC_REF_EXPR,
1738 
1739   /// An ObjCMessageExpr record.
1740   EXPR_OBJC_MESSAGE_EXPR,
1741 
1742   /// An ObjCIsa Expr record.
1743   EXPR_OBJC_ISA,
1744 
1745   /// An ObjCIndirectCopyRestoreExpr record.
1746   EXPR_OBJC_INDIRECT_COPY_RESTORE,
1747 
1748   /// An ObjCForCollectionStmt record.
1749   STMT_OBJC_FOR_COLLECTION,
1750 
1751   /// An ObjCAtCatchStmt record.
1752   STMT_OBJC_CATCH,
1753 
1754   /// An ObjCAtFinallyStmt record.
1755   STMT_OBJC_FINALLY,
1756 
1757   /// An ObjCAtTryStmt record.
1758   STMT_OBJC_AT_TRY,
1759 
1760   /// An ObjCAtSynchronizedStmt record.
1761   STMT_OBJC_AT_SYNCHRONIZED,
1762 
1763   /// An ObjCAtThrowStmt record.
1764   STMT_OBJC_AT_THROW,
1765 
1766   /// An ObjCAutoreleasePoolStmt record.
1767   STMT_OBJC_AUTORELEASE_POOL,
1768 
1769   /// An ObjCBoolLiteralExpr record.
1770   EXPR_OBJC_BOOL_LITERAL,
1771 
1772   /// An ObjCAvailabilityCheckExpr record.
1773   EXPR_OBJC_AVAILABILITY_CHECK,
1774 
1775   // C++
1776 
1777   /// A CXXCatchStmt record.
1778   STMT_CXX_CATCH,
1779 
1780   /// A CXXTryStmt record.
1781   STMT_CXX_TRY,
1782   /// A CXXForRangeStmt record.
1783 
1784   STMT_CXX_FOR_RANGE,
1785 
1786   /// A CXXOperatorCallExpr record.
1787   EXPR_CXX_OPERATOR_CALL,
1788 
1789   /// A CXXMemberCallExpr record.
1790   EXPR_CXX_MEMBER_CALL,
1791 
1792   /// A CXXRewrittenBinaryOperator record.
1793   EXPR_CXX_REWRITTEN_BINARY_OPERATOR,
1794 
1795   /// A CXXConstructExpr record.
1796   EXPR_CXX_CONSTRUCT,
1797 
1798   /// A CXXInheritedCtorInitExpr record.
1799   EXPR_CXX_INHERITED_CTOR_INIT,
1800 
1801   /// A CXXTemporaryObjectExpr record.
1802   EXPR_CXX_TEMPORARY_OBJECT,
1803 
1804   /// A CXXStaticCastExpr record.
1805   EXPR_CXX_STATIC_CAST,
1806 
1807   /// A CXXDynamicCastExpr record.
1808   EXPR_CXX_DYNAMIC_CAST,
1809 
1810   /// A CXXReinterpretCastExpr record.
1811   EXPR_CXX_REINTERPRET_CAST,
1812 
1813   /// A CXXConstCastExpr record.
1814   EXPR_CXX_CONST_CAST,
1815 
1816   /// A CXXAddrspaceCastExpr record.
1817   EXPR_CXX_ADDRSPACE_CAST,
1818 
1819   /// A CXXFunctionalCastExpr record.
1820   EXPR_CXX_FUNCTIONAL_CAST,
1821 
1822   /// A BuiltinBitCastExpr record.
1823   EXPR_BUILTIN_BIT_CAST,
1824 
1825   /// A UserDefinedLiteral record.
1826   EXPR_USER_DEFINED_LITERAL,
1827 
1828   /// A CXXStdInitializerListExpr record.
1829   EXPR_CXX_STD_INITIALIZER_LIST,
1830 
1831   /// A CXXBoolLiteralExpr record.
1832   EXPR_CXX_BOOL_LITERAL,
1833 
1834   /// A CXXParenListInitExpr record.
1835   EXPR_CXX_PAREN_LIST_INIT,
1836 
1837   EXPR_CXX_NULL_PTR_LITERAL, // CXXNullPtrLiteralExpr
1838   EXPR_CXX_TYPEID_EXPR,      // CXXTypeidExpr (of expr).
1839   EXPR_CXX_TYPEID_TYPE,      // CXXTypeidExpr (of type).
1840   EXPR_CXX_THIS,             // CXXThisExpr
1841   EXPR_CXX_THROW,            // CXXThrowExpr
1842   EXPR_CXX_DEFAULT_ARG,      // CXXDefaultArgExpr
1843   EXPR_CXX_DEFAULT_INIT,     // CXXDefaultInitExpr
1844   EXPR_CXX_BIND_TEMPORARY,   // CXXBindTemporaryExpr
1845 
1846   EXPR_CXX_SCALAR_VALUE_INIT, // CXXScalarValueInitExpr
1847   EXPR_CXX_NEW,               // CXXNewExpr
1848   EXPR_CXX_DELETE,            // CXXDeleteExpr
1849   EXPR_CXX_PSEUDO_DESTRUCTOR, // CXXPseudoDestructorExpr
1850 
1851   EXPR_EXPR_WITH_CLEANUPS, // ExprWithCleanups
1852 
1853   EXPR_CXX_DEPENDENT_SCOPE_MEMBER,   // CXXDependentScopeMemberExpr
1854   EXPR_CXX_DEPENDENT_SCOPE_DECL_REF, // DependentScopeDeclRefExpr
1855   EXPR_CXX_UNRESOLVED_CONSTRUCT,     // CXXUnresolvedConstructExpr
1856   EXPR_CXX_UNRESOLVED_MEMBER,        // UnresolvedMemberExpr
1857   EXPR_CXX_UNRESOLVED_LOOKUP,        // UnresolvedLookupExpr
1858 
1859   EXPR_CXX_EXPRESSION_TRAIT, // ExpressionTraitExpr
1860   EXPR_CXX_NOEXCEPT,         // CXXNoexceptExpr
1861 
1862   EXPR_OPAQUE_VALUE,                // OpaqueValueExpr
1863   EXPR_BINARY_CONDITIONAL_OPERATOR, // BinaryConditionalOperator
1864   EXPR_TYPE_TRAIT,                  // TypeTraitExpr
1865   EXPR_ARRAY_TYPE_TRAIT,            // ArrayTypeTraitIntExpr
1866 
1867   EXPR_PACK_EXPANSION,                    // PackExpansionExpr
1868   EXPR_PACK_INDEXING,                     // PackIndexingExpr
1869   EXPR_SIZEOF_PACK,                       // SizeOfPackExpr
1870   EXPR_SUBST_NON_TYPE_TEMPLATE_PARM,      // SubstNonTypeTemplateParmExpr
1871   EXPR_SUBST_NON_TYPE_TEMPLATE_PARM_PACK, // SubstNonTypeTemplateParmPackExpr
1872   EXPR_FUNCTION_PARM_PACK,                // FunctionParmPackExpr
1873   EXPR_MATERIALIZE_TEMPORARY,             // MaterializeTemporaryExpr
1874   EXPR_CXX_FOLD,                          // CXXFoldExpr
1875   EXPR_CONCEPT_SPECIALIZATION,            // ConceptSpecializationExpr
1876   EXPR_REQUIRES,                          // RequiresExpr
1877 
1878   // CUDA
1879   EXPR_CUDA_KERNEL_CALL, // CUDAKernelCallExpr
1880 
1881   // OpenCL
1882   EXPR_ASTYPE, // AsTypeExpr
1883 
1884   // Microsoft
1885   EXPR_CXX_PROPERTY_REF_EXPR,       // MSPropertyRefExpr
1886   EXPR_CXX_PROPERTY_SUBSCRIPT_EXPR, // MSPropertySubscriptExpr
1887   EXPR_CXX_UUIDOF_EXPR,             // CXXUuidofExpr (of expr).
1888   EXPR_CXX_UUIDOF_TYPE,             // CXXUuidofExpr (of type).
1889   STMT_SEH_LEAVE,                   // SEHLeaveStmt
1890   STMT_SEH_EXCEPT,                  // SEHExceptStmt
1891   STMT_SEH_FINALLY,                 // SEHFinallyStmt
1892   STMT_SEH_TRY,                     // SEHTryStmt
1893 
1894   // OpenMP directives
1895   STMT_OMP_META_DIRECTIVE,
1896   STMT_OMP_CANONICAL_LOOP,
1897   STMT_OMP_PARALLEL_DIRECTIVE,
1898   STMT_OMP_SIMD_DIRECTIVE,
1899   STMT_OMP_TILE_DIRECTIVE,
1900   STMT_OMP_UNROLL_DIRECTIVE,
1901   STMT_OMP_REVERSE_DIRECTIVE,
1902   STMT_OMP_INTERCHANGE_DIRECTIVE,
1903   STMT_OMP_FOR_DIRECTIVE,
1904   STMT_OMP_FOR_SIMD_DIRECTIVE,
1905   STMT_OMP_SECTIONS_DIRECTIVE,
1906   STMT_OMP_SECTION_DIRECTIVE,
1907   STMT_OMP_SINGLE_DIRECTIVE,
1908   STMT_OMP_MASTER_DIRECTIVE,
1909   STMT_OMP_CRITICAL_DIRECTIVE,
1910   STMT_OMP_PARALLEL_FOR_DIRECTIVE,
1911   STMT_OMP_PARALLEL_FOR_SIMD_DIRECTIVE,
1912   STMT_OMP_PARALLEL_MASTER_DIRECTIVE,
1913   STMT_OMP_PARALLEL_MASKED_DIRECTIVE,
1914   STMT_OMP_PARALLEL_SECTIONS_DIRECTIVE,
1915   STMT_OMP_TASK_DIRECTIVE,
1916   STMT_OMP_TASKYIELD_DIRECTIVE,
1917   STMT_OMP_ERROR_DIRECTIVE,
1918   STMT_OMP_BARRIER_DIRECTIVE,
1919   STMT_OMP_TASKWAIT_DIRECTIVE,
1920   STMT_OMP_FLUSH_DIRECTIVE,
1921   STMT_OMP_DEPOBJ_DIRECTIVE,
1922   STMT_OMP_SCAN_DIRECTIVE,
1923   STMT_OMP_ORDERED_DIRECTIVE,
1924   STMT_OMP_ATOMIC_DIRECTIVE,
1925   STMT_OMP_TARGET_DIRECTIVE,
1926   STMT_OMP_TARGET_DATA_DIRECTIVE,
1927   STMT_OMP_TARGET_ENTER_DATA_DIRECTIVE,
1928   STMT_OMP_TARGET_EXIT_DATA_DIRECTIVE,
1929   STMT_OMP_TARGET_PARALLEL_DIRECTIVE,
1930   STMT_OMP_TARGET_PARALLEL_FOR_DIRECTIVE,
1931   STMT_OMP_TEAMS_DIRECTIVE,
1932   STMT_OMP_TASKGROUP_DIRECTIVE,
1933   STMT_OMP_CANCELLATION_POINT_DIRECTIVE,
1934   STMT_OMP_CANCEL_DIRECTIVE,
1935   STMT_OMP_TASKLOOP_DIRECTIVE,
1936   STMT_OMP_TASKLOOP_SIMD_DIRECTIVE,
1937   STMT_OMP_MASTER_TASKLOOP_DIRECTIVE,
1938   STMT_OMP_MASTER_TASKLOOP_SIMD_DIRECTIVE,
1939   STMT_OMP_PARALLEL_MASTER_TASKLOOP_DIRECTIVE,
1940   STMT_OMP_PARALLEL_MASTER_TASKLOOP_SIMD_DIRECTIVE,
1941   STMT_OMP_MASKED_TASKLOOP_DIRECTIVE,
1942   STMT_OMP_MASKED_TASKLOOP_SIMD_DIRECTIVE,
1943   STMT_OMP_PARALLEL_MASKED_TASKLOOP_DIRECTIVE,
1944   STMT_OMP_PARALLEL_MASKED_TASKLOOP_SIMD_DIRECTIVE,
1945   STMT_OMP_DISTRIBUTE_DIRECTIVE,
1946   STMT_OMP_TARGET_UPDATE_DIRECTIVE,
1947   STMT_OMP_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE,
1948   STMT_OMP_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE,
1949   STMT_OMP_DISTRIBUTE_SIMD_DIRECTIVE,
1950   STMT_OMP_TARGET_PARALLEL_FOR_SIMD_DIRECTIVE,
1951   STMT_OMP_TARGET_SIMD_DIRECTIVE,
1952   STMT_OMP_TEAMS_DISTRIBUTE_DIRECTIVE,
1953   STMT_OMP_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE,
1954   STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE,
1955   STMT_OMP_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE,
1956   STMT_OMP_TARGET_TEAMS_DIRECTIVE,
1957   STMT_OMP_TARGET_TEAMS_DISTRIBUTE_DIRECTIVE,
1958   STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_DIRECTIVE,
1959   STMT_OMP_TARGET_TEAMS_DISTRIBUTE_PARALLEL_FOR_SIMD_DIRECTIVE,
1960   STMT_OMP_TARGET_TEAMS_DISTRIBUTE_SIMD_DIRECTIVE,
1961   STMT_OMP_SCOPE_DIRECTIVE,
1962   STMT_OMP_INTEROP_DIRECTIVE,
1963   STMT_OMP_DISPATCH_DIRECTIVE,
1964   STMT_OMP_MASKED_DIRECTIVE,
1965   STMT_OMP_GENERIC_LOOP_DIRECTIVE,
1966   STMT_OMP_TEAMS_GENERIC_LOOP_DIRECTIVE,
1967   STMT_OMP_TARGET_TEAMS_GENERIC_LOOP_DIRECTIVE,
1968   STMT_OMP_PARALLEL_GENERIC_LOOP_DIRECTIVE,
1969   STMT_OMP_TARGET_PARALLEL_GENERIC_LOOP_DIRECTIVE,
1970   EXPR_ARRAY_SECTION,
1971   EXPR_OMP_ARRAY_SHAPING,
1972   EXPR_OMP_ITERATOR,
1973 
1974   // ARC
1975   EXPR_OBJC_BRIDGED_CAST, // ObjCBridgedCastExpr
1976 
1977   STMT_MS_DEPENDENT_EXISTS, // MSDependentExistsStmt
1978   EXPR_LAMBDA,              // LambdaExpr
1979   STMT_COROUTINE_BODY,
1980   STMT_CORETURN,
1981   EXPR_COAWAIT,
1982   EXPR_COYIELD,
1983   EXPR_DEPENDENT_COAWAIT,
1984 
1985   // FixedPointLiteral
1986   EXPR_FIXEDPOINT_LITERAL,
1987 
1988   // SYCLUniqueStableNameExpr
1989   EXPR_SYCL_UNIQUE_STABLE_NAME,
1990 
1991   // OpenACC Constructs
1992   STMT_OPENACC_COMPUTE_CONSTRUCT,
1993   STMT_OPENACC_LOOP_CONSTRUCT,
1994 };
1995 
1996 /// The kinds of designators that can occur in a
1997 /// DesignatedInitExpr.
1998 enum DesignatorTypes {
1999   /// Field designator where only the field name is known.
2000   DESIG_FIELD_NAME = 0,
2001 
2002   /// Field designator where the field has been resolved to
2003   /// a declaration.
2004   DESIG_FIELD_DECL = 1,
2005 
2006   /// Array designator.
2007   DESIG_ARRAY = 2,
2008 
2009   /// GNU array range designator.
2010   DESIG_ARRAY_RANGE = 3
2011 };
2012 
2013 /// The different kinds of data that can occur in a
2014 /// CtorInitializer.
2015 enum CtorInitializerType {
2016   CTOR_INITIALIZER_BASE,
2017   CTOR_INITIALIZER_DELEGATING,
2018   CTOR_INITIALIZER_MEMBER,
2019   CTOR_INITIALIZER_INDIRECT_MEMBER
2020 };
2021 
2022 /// Kinds of cleanup objects owned by ExprWithCleanups.
2023 enum CleanupObjectKind { COK_Block, COK_CompoundLiteral };
2024 
2025 /// Describes the categories of an Objective-C class.
2026 struct ObjCCategoriesInfo {
2027   // The ID of the definition. Use unaligned_decl_id_t to keep
2028   // ObjCCategoriesInfo 32-bit aligned.
2029   unaligned_decl_id_t DefinitionID;
2030 
2031   // Offset into the array of category lists.
2032   unsigned Offset;
2033 
2034   ObjCCategoriesInfo() = default;
ObjCCategoriesInfoObjCCategoriesInfo2035   ObjCCategoriesInfo(LocalDeclID ID, unsigned Offset)
2036       : DefinitionID(ID.getRawValue()), Offset(Offset) {}
2037 
getDefinitionIDObjCCategoriesInfo2038   DeclID getDefinitionID() const { return DefinitionID; }
2039 
2040   friend bool operator<(const ObjCCategoriesInfo &X,
2041                         const ObjCCategoriesInfo &Y) {
2042     return X.getDefinitionID() < Y.getDefinitionID();
2043   }
2044 
2045   friend bool operator>(const ObjCCategoriesInfo &X,
2046                         const ObjCCategoriesInfo &Y) {
2047     return X.getDefinitionID() > Y.getDefinitionID();
2048   }
2049 
2050   friend bool operator<=(const ObjCCategoriesInfo &X,
2051                          const ObjCCategoriesInfo &Y) {
2052     return X.getDefinitionID() <= Y.getDefinitionID();
2053   }
2054 
2055   friend bool operator>=(const ObjCCategoriesInfo &X,
2056                          const ObjCCategoriesInfo &Y) {
2057     return X.getDefinitionID() >= Y.getDefinitionID();
2058   }
2059 };
2060 
2061 static_assert(alignof(ObjCCategoriesInfo) <= 4);
2062 static_assert(std::is_standard_layout_v<ObjCCategoriesInfo> &&
2063               std::is_trivial_v<ObjCCategoriesInfo>);
2064 
2065 /// A key used when looking up entities by \ref DeclarationName.
2066 ///
2067 /// Different \ref DeclarationNames are mapped to different keys, but the
2068 /// same key can occasionally represent multiple names (for names that
2069 /// contain types, in particular).
2070 class DeclarationNameKey {
2071   using NameKind = unsigned;
2072 
2073   NameKind Kind = 0;
2074   uint64_t Data = 0;
2075 
2076 public:
2077   DeclarationNameKey() = default;
2078   DeclarationNameKey(DeclarationName Name);
DeclarationNameKey(NameKind Kind,uint64_t Data)2079   DeclarationNameKey(NameKind Kind, uint64_t Data) : Kind(Kind), Data(Data) {}
2080 
getKind()2081   NameKind getKind() const { return Kind; }
2082 
getIdentifier()2083   IdentifierInfo *getIdentifier() const {
2084     assert(Kind == DeclarationName::Identifier ||
2085            Kind == DeclarationName::CXXLiteralOperatorName ||
2086            Kind == DeclarationName::CXXDeductionGuideName);
2087     return (IdentifierInfo *)Data;
2088   }
2089 
getSelector()2090   Selector getSelector() const {
2091     assert(Kind == DeclarationName::ObjCZeroArgSelector ||
2092            Kind == DeclarationName::ObjCOneArgSelector ||
2093            Kind == DeclarationName::ObjCMultiArgSelector);
2094     return Selector(Data);
2095   }
2096 
getOperatorKind()2097   OverloadedOperatorKind getOperatorKind() const {
2098     assert(Kind == DeclarationName::CXXOperatorName);
2099     return (OverloadedOperatorKind)Data;
2100   }
2101 
2102   /// Compute a fingerprint of this key for use in on-disk hash table.
2103   unsigned getHash() const;
2104 
2105   friend bool operator==(const DeclarationNameKey &A,
2106                          const DeclarationNameKey &B) {
2107     return A.Kind == B.Kind && A.Data == B.Data;
2108   }
2109 };
2110 
2111 /// @}
2112 
2113 } // namespace serialization
2114 } // namespace clang
2115 
2116 namespace llvm {
2117 
2118 template <> struct DenseMapInfo<clang::serialization::DeclarationNameKey> {
2119   static clang::serialization::DeclarationNameKey getEmptyKey() {
2120     return clang::serialization::DeclarationNameKey(-1, 1);
2121   }
2122 
2123   static clang::serialization::DeclarationNameKey getTombstoneKey() {
2124     return clang::serialization::DeclarationNameKey(-1, 2);
2125   }
2126 
2127   static unsigned
2128   getHashValue(const clang::serialization::DeclarationNameKey &Key) {
2129     return Key.getHash();
2130   }
2131 
2132   static bool isEqual(const clang::serialization::DeclarationNameKey &L,
2133                       const clang::serialization::DeclarationNameKey &R) {
2134     return L == R;
2135   }
2136 };
2137 
2138 } // namespace llvm
2139 
2140 #endif // LLVM_CLANG_SERIALIZATION_ASTBITCODES_H
2141