ASTContext.h source code [clang_source_code/include/clang/AST/ASTContext.h]

1	//===- ASTContext.h - Context to hold long-lived AST nodes ------- 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	/// \file
10	/// Defines the clang::ASTContext interface.
11	//
12	//===----------------------------------------------------------------------===//
13
14	#ifndef LLVM_CLANG_AST_ASTCONTEXT_H
15	#define LLVM_CLANG_AST_ASTCONTEXT_H
16
17	#include "clang/AST/ASTContextAllocate.h"
18	#include "clang/AST/ASTTypeTraits.h"
19	#include "clang/AST/CanonicalType.h"
20	#include "clang/AST/CommentCommandTraits.h"
21	#include "clang/AST/ComparisonCategories.h"
22	#include "clang/AST/Decl.h"
23	#include "clang/AST/DeclBase.h"
24	#include "clang/AST/DeclarationName.h"
25	#include "clang/AST/Expr.h"
26	#include "clang/AST/ExternalASTSource.h"
27	#include "clang/AST/NestedNameSpecifier.h"
28	#include "clang/AST/PrettyPrinter.h"
29	#include "clang/AST/RawCommentList.h"
30	#include "clang/AST/TemplateBase.h"
31	#include "clang/AST/TemplateName.h"
32	#include "clang/AST/Type.h"
33	#include "clang/Basic/AddressSpaces.h"
34	#include "clang/Basic/AttrKinds.h"
35	#include "clang/Basic/IdentifierTable.h"
36	#include "clang/Basic/LLVM.h"
37	#include "clang/Basic/LangOptions.h"
38	#include "clang/Basic/Linkage.h"
39	#include "clang/Basic/OperatorKinds.h"
40	#include "clang/Basic/PartialDiagnostic.h"
41	#include "clang/Basic/SanitizerBlacklist.h"
42	#include "clang/Basic/SourceLocation.h"
43	#include "clang/Basic/Specifiers.h"
44	#include "clang/Basic/TargetInfo.h"
45	#include "clang/Basic/XRayLists.h"
46	#include "llvm/ADT/APSInt.h"
47	#include "llvm/ADT/ArrayRef.h"
48	#include "llvm/ADT/DenseMap.h"
49	#include "llvm/ADT/FoldingSet.h"
50	#include "llvm/ADT/IntrusiveRefCntPtr.h"
51	#include "llvm/ADT/MapVector.h"
52	#include "llvm/ADT/None.h"
53	#include "llvm/ADT/Optional.h"
54	#include "llvm/ADT/PointerIntPair.h"
55	#include "llvm/ADT/PointerUnion.h"
56	#include "llvm/ADT/SmallVector.h"
57	#include "llvm/ADT/StringMap.h"
58	#include "llvm/ADT/StringRef.h"
59	#include "llvm/ADT/TinyPtrVector.h"
60	#include "llvm/ADT/Triple.h"
61	#include "llvm/ADT/iterator_range.h"
62	#include "llvm/Support/AlignOf.h"
63	#include "llvm/Support/Allocator.h"
64	#include "llvm/Support/Casting.h"
65	#include "llvm/Support/Compiler.h"
66	#include <cassert>
67	#include <cstddef>
68	#include <cstdint>
69	#include <iterator>
70	#include <memory>
71	#include <string>
72	#include <type_traits>
73	#include <utility>
74	#include <vector>
75
76	namespace llvm {
77
78	struct fltSemantics;
79
80	} // namespace llvm
81
82	namespace clang {
83
84	class APFixedPoint;
85	class APValue;
86	class ASTMutationListener;
87	class ASTRecordLayout;
88	class AtomicExpr;
89	class BlockExpr;
90	class BuiltinTemplateDecl;
91	class CharUnits;
92	class CXXABI;
93	class CXXConstructorDecl;
94	class CXXMethodDecl;
95	class CXXRecordDecl;
96	class DiagnosticsEngine;
97	class Expr;
98	class FixedPointSemantics;
99	class MangleContext;
100	class MangleNumberingContext;
101	class MaterializeTemporaryExpr;
102	class MemberSpecializationInfo;
103	class Module;
104	class ObjCCategoryDecl;
105	class ObjCCategoryImplDecl;
106	class ObjCContainerDecl;
107	class ObjCImplDecl;
108	class ObjCImplementationDecl;
109	class ObjCInterfaceDecl;
110	class ObjCIvarDecl;
111	class ObjCMethodDecl;
112	class ObjCPropertyDecl;
113	class ObjCPropertyImplDecl;
114	class ObjCProtocolDecl;
115	class ObjCTypeParamDecl;
116	class Preprocessor;
117	class Stmt;
118	class StoredDeclsMap;
119	class TemplateDecl;
120	class TemplateParameterList;
121	class TemplateTemplateParmDecl;
122	class TemplateTypeParmDecl;
123	class UnresolvedSetIterator;
124	class UsingShadowDecl;
125	class VarTemplateDecl;
126	class VTableContextBase;
127
128	namespace Builtin {
129
130	class Context;
131
132	} // namespace Builtin
133
134	enum BuiltinTemplateKind : int;
135
136	namespace comments {
137
138	class FullComment;
139
140	} // namespace comments
141
142	struct TypeInfo {
143	uint64_t Width = 0;
144	unsigned Align = 0;
145	bool AlignIsRequired : 1;
146
147	TypeInfo() : AlignIsRequired(false) {}
148	TypeInfo(uint64_t Width, unsigned Align, bool AlignIsRequired)
149	: Width(Width), Align(Align), AlignIsRequired(AlignIsRequired) {}
150	};
151
152	/// Holds long-lived AST nodes (such as types and decls) that can be
153	/// referred to throughout the semantic analysis of a file.
154	class ASTContext : public RefCountedBase<ASTContext> {
155	public:
156	/// Copy initialization expr of a __block variable and a boolean flag that
157	/// indicates whether the expression can throw.
158	struct BlockVarCopyInit {
159	BlockVarCopyInit() = default;
160	BlockVarCopyInit(Expr *CopyExpr, bool CanThrow)
161	: ExprAndFlag(CopyExpr, CanThrow) {}
162	void setExprAndFlag(Expr *CopyExpr, bool CanThrow) {
163	ExprAndFlag.setPointerAndInt(CopyExpr, CanThrow);
164	}
165	Expr *getCopyExpr() const { return ExprAndFlag.getPointer(); }
166	bool canThrow() const { return ExprAndFlag.getInt(); }
167	llvm::PointerIntPair<Expr *, 1, bool> ExprAndFlag;
168	};
169
170	private:
171	friend class NestedNameSpecifier;
172
173	mutable SmallVector<Type *, 0> Types;
174	mutable llvm::FoldingSet<ExtQuals> ExtQualNodes;
175	mutable llvm::FoldingSet<ComplexType> ComplexTypes;
176	mutable llvm::FoldingSet<PointerType> PointerTypes;
177	mutable llvm::FoldingSet<AdjustedType> AdjustedTypes;
178	mutable llvm::FoldingSet<BlockPointerType> BlockPointerTypes;
179	mutable llvm::FoldingSet<LValueReferenceType> LValueReferenceTypes;
180	mutable llvm::FoldingSet<RValueReferenceType> RValueReferenceTypes;
181	mutable llvm::FoldingSet<MemberPointerType> MemberPointerTypes;
182	mutable llvm::FoldingSet<ConstantArrayType> ConstantArrayTypes;
183	mutable llvm::FoldingSet<IncompleteArrayType> IncompleteArrayTypes;
184	mutable std::vector<VariableArrayType*> VariableArrayTypes;
185	mutable llvm::FoldingSet<DependentSizedArrayType> DependentSizedArrayTypes;
186	mutable llvm::FoldingSet<DependentSizedExtVectorType>
187	DependentSizedExtVectorTypes;
188	mutable llvm::FoldingSet<DependentAddressSpaceType>
189	DependentAddressSpaceTypes;
190	mutable llvm::FoldingSet<VectorType> VectorTypes;
191	mutable llvm::FoldingSet<DependentVectorType> DependentVectorTypes;
192	mutable llvm::FoldingSet<FunctionNoProtoType> FunctionNoProtoTypes;
193	mutable llvm::ContextualFoldingSet<FunctionProtoType, ASTContext&>
194	FunctionProtoTypes;
195	mutable llvm::FoldingSet<DependentTypeOfExprType> DependentTypeOfExprTypes;
196	mutable llvm::FoldingSet<DependentDecltypeType> DependentDecltypeTypes;
197	mutable llvm::FoldingSet<TemplateTypeParmType> TemplateTypeParmTypes;
198	mutable llvm::FoldingSet<ObjCTypeParamType> ObjCTypeParamTypes;
199	mutable llvm::FoldingSet<SubstTemplateTypeParmType>
200	SubstTemplateTypeParmTypes;
201	mutable llvm::FoldingSet<SubstTemplateTypeParmPackType>
202	SubstTemplateTypeParmPackTypes;
203	mutable llvm::ContextualFoldingSet<TemplateSpecializationType, ASTContext&>
204	TemplateSpecializationTypes;
205	mutable llvm::FoldingSet<ParenType> ParenTypes;
206	mutable llvm::FoldingSet<ElaboratedType> ElaboratedTypes;
207	mutable llvm::FoldingSet<DependentNameType> DependentNameTypes;
208	mutable llvm::ContextualFoldingSet<DependentTemplateSpecializationType,
209	ASTContext&>
210	DependentTemplateSpecializationTypes;
211	llvm::FoldingSet<PackExpansionType> PackExpansionTypes;
212	mutable llvm::FoldingSet<ObjCObjectTypeImpl> ObjCObjectTypes;
213	mutable llvm::FoldingSet<ObjCObjectPointerType> ObjCObjectPointerTypes;
214	mutable llvm::FoldingSet<DependentUnaryTransformType>
215	DependentUnaryTransformTypes;
216	mutable llvm::FoldingSet<AutoType> AutoTypes;
217	mutable llvm::FoldingSet<DeducedTemplateSpecializationType>
218	DeducedTemplateSpecializationTypes;
219	mutable llvm::FoldingSet<AtomicType> AtomicTypes;
220	llvm::FoldingSet<AttributedType> AttributedTypes;
221	mutable llvm::FoldingSet<PipeType> PipeTypes;
222
223	mutable llvm::FoldingSet<QualifiedTemplateName> QualifiedTemplateNames;
224	mutable llvm::FoldingSet<DependentTemplateName> DependentTemplateNames;
225	mutable llvm::FoldingSet<SubstTemplateTemplateParmStorage>
226	SubstTemplateTemplateParms;
227	mutable llvm::ContextualFoldingSet<SubstTemplateTemplateParmPackStorage,
228	ASTContext&>
229	SubstTemplateTemplateParmPacks;
230
231	/// The set of nested name specifiers.
232	///
233	/// This set is managed by the NestedNameSpecifier class.
234	mutable llvm::FoldingSet<NestedNameSpecifier> NestedNameSpecifiers;
235	mutable NestedNameSpecifier *GlobalNestedNameSpecifier = nullptr;
236
237	/// A cache mapping from RecordDecls to ASTRecordLayouts.
238	///
239	/// This is lazily created. This is intentionally not serialized.
240	mutable llvm::DenseMap<const RecordDecl, const ASTRecordLayout>
241	ASTRecordLayouts;
242	mutable llvm::DenseMap<const ObjCContainerDecl, const ASTRecordLayout>
243	ObjCLayouts;
244
245	/// A cache from types to size and alignment information.
246	using TypeInfoMap = llvm::DenseMap<const Type *, struct TypeInfo>;
247	mutable TypeInfoMap MemoizedTypeInfo;
248
249	/// A cache from types to unadjusted alignment information. Only ARM and
250	/// AArch64 targets need this information, keeping it separate prevents
251	/// imposing overhead on TypeInfo size.
252	using UnadjustedAlignMap = llvm::DenseMap<const Type *, unsigned>;
253	mutable UnadjustedAlignMap MemoizedUnadjustedAlign;
254
255	/// A cache mapping from CXXRecordDecls to key functions.
256	llvm::DenseMap<const CXXRecordDecl*, LazyDeclPtr> KeyFunctions;
257
258	/// Mapping from ObjCContainers to their ObjCImplementations.
259	llvm::DenseMap<ObjCContainerDecl, ObjCImplDecl> ObjCImpls;
260
261	/// Mapping from ObjCMethod to its duplicate declaration in the same
262	/// interface.
263	llvm::DenseMap<const ObjCMethodDecl,const ObjCMethodDecl> ObjCMethodRedecls;
264
265	/// Mapping from __block VarDecls to BlockVarCopyInit.
266	llvm::DenseMap<const VarDecl *, BlockVarCopyInit> BlockVarCopyInits;
267
268	/// Mapping from class scope functions specialization to their
269	/// template patterns.
270	llvm::DenseMap<const FunctionDecl, FunctionDecl>
271	ClassScopeSpecializationPattern;
272
273	/// Mapping from materialized temporaries with static storage duration
274	/// that appear in constant initializers to their evaluated values. These are
275	/// allocated in a std::map because their address must be stable.
276	llvm::DenseMap<const MaterializeTemporaryExpr , APValue >
277	MaterializedTemporaryValues;
278
279	/// Representation of a "canonical" template template parameter that
280	/// is used in canonical template names.
281	class CanonicalTemplateTemplateParm : public llvm::FoldingSetNode {
282	TemplateTemplateParmDecl *Parm;
283
284	public:
285	CanonicalTemplateTemplateParm(TemplateTemplateParmDecl *Parm)
286	: Parm(Parm) {}
287
288	TemplateTemplateParmDecl *getParam() const { return Parm; }
289
290	void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, Parm); }
291
292	static void Profile(llvm::FoldingSetNodeID &ID,
293	TemplateTemplateParmDecl *Parm);
294	};
295	mutable llvm::FoldingSet<CanonicalTemplateTemplateParm>
296	CanonTemplateTemplateParms;
297
298	TemplateTemplateParmDecl *
299	getCanonicalTemplateTemplateParmDecl(TemplateTemplateParmDecl *TTP) const;
300
301	/// The typedef for the __int128_t type.
302	mutable TypedefDecl *Int128Decl = nullptr;
303
304	/// The typedef for the __uint128_t type.
305	mutable TypedefDecl *UInt128Decl = nullptr;
306
307	/// The typedef for the target specific predefined
308	/// __builtin_va_list type.
309	mutable TypedefDecl *BuiltinVaListDecl = nullptr;
310
311	/// The typedef for the predefined \c __builtin_ms_va_list type.
312	mutable TypedefDecl *BuiltinMSVaListDecl = nullptr;
313
314	/// The typedef for the predefined \c id type.
315	mutable TypedefDecl *ObjCIdDecl = nullptr;
316
317	/// The typedef for the predefined \c SEL type.
318	mutable TypedefDecl *ObjCSelDecl = nullptr;
319
320	/// The typedef for the predefined \c Class type.
321	mutable TypedefDecl *ObjCClassDecl = nullptr;
322
323	/// The typedef for the predefined \c Protocol class in Objective-C.
324	mutable ObjCInterfaceDecl *ObjCProtocolClassDecl = nullptr;
325
326	/// The typedef for the predefined 'BOOL' type.
327	mutable TypedefDecl *BOOLDecl = nullptr;
328
329	// Typedefs which may be provided defining the structure of Objective-C
330	// pseudo-builtins
331	QualType ObjCIdRedefinitionType;
332	QualType ObjCClassRedefinitionType;
333	QualType ObjCSelRedefinitionType;
334
335	/// The identifier 'bool'.
336	mutable IdentifierInfo *BoolName = nullptr;
337
338	/// The identifier 'NSObject'.
339	mutable IdentifierInfo *NSObjectName = nullptr;
340
341	/// The identifier 'NSCopying'.
342	IdentifierInfo *NSCopyingName = nullptr;
343
344	/// The identifier '__make_integer_seq'.
345	mutable IdentifierInfo *MakeIntegerSeqName = nullptr;
346
347	/// The identifier '__type_pack_element'.
348	mutable IdentifierInfo *TypePackElementName = nullptr;
349
350	QualType ObjCConstantStringType;
351	mutable RecordDecl *CFConstantStringTagDecl = nullptr;
352	mutable TypedefDecl *CFConstantStringTypeDecl = nullptr;
353
354	mutable QualType ObjCSuperType;
355
356	QualType ObjCNSStringType;
357
358	/// The typedef declaration for the Objective-C "instancetype" type.
359	TypedefDecl *ObjCInstanceTypeDecl = nullptr;
360
361	/// The type for the C FILE type.
362	TypeDecl *FILEDecl = nullptr;
363
364	/// The type for the C jmp_buf type.
365	TypeDecl *jmp_bufDecl = nullptr;
366
367	/// The type for the C sigjmp_buf type.
368	TypeDecl *sigjmp_bufDecl = nullptr;
369
370	/// The type for the C ucontext_t type.
371	TypeDecl *ucontext_tDecl = nullptr;
372
373	/// Type for the Block descriptor for Blocks CodeGen.
374	///
375	/// Since this is only used for generation of debug info, it is not
376	/// serialized.
377	mutable RecordDecl *BlockDescriptorType = nullptr;
378
379	/// Type for the Block descriptor for Blocks CodeGen.
380	///
381	/// Since this is only used for generation of debug info, it is not
382	/// serialized.
383	mutable RecordDecl *BlockDescriptorExtendedType = nullptr;
384
385	/// Declaration for the CUDA cudaConfigureCall function.
386	FunctionDecl *cudaConfigureCallDecl = nullptr;
387
388	/// Keeps track of all declaration attributes.
389	///
390	/// Since so few decls have attrs, we keep them in a hash map instead of
391	/// wasting space in the Decl class.
392	llvm::DenseMap<const Decl, AttrVec> DeclAttrs;
393
394	/// A mapping from non-redeclarable declarations in modules that were
395	/// merged with other declarations to the canonical declaration that they were
396	/// merged into.
397	llvm::DenseMap<Decl, Decl> MergedDecls;
398
399	/// A mapping from a defining declaration to a list of modules (other
400	/// than the owning module of the declaration) that contain merged
401	/// definitions of that entity.
402	llvm::DenseMap<NamedDecl, llvm::TinyPtrVector<Module>> MergedDefModules;
403
404	/// Initializers for a module, in order. Each Decl will be either
405	/// something that has a semantic effect on startup (such as a variable with
406	/// a non-constant initializer), or an ImportDecl (which recursively triggers
407	/// initialization of another module).
408	struct PerModuleInitializers {
409	llvm::SmallVector<Decl*, 4> Initializers;
410	llvm::SmallVector<uint32_t, 4> LazyInitializers;
411
412	void resolve(ASTContext &Ctx);
413	};
414	llvm::DenseMap<Module, PerModuleInitializers> ModuleInitializers;
415
416	ASTContext &this_() { return *this; }
417
418	public:
419	/// A type synonym for the TemplateOrInstantiation mapping.
420	using TemplateOrSpecializationInfo =
421	llvm::PointerUnion<VarTemplateDecl , MemberSpecializationInfo >;
422
423	private:
424	friend class ASTDeclReader;
425	friend class ASTReader;
426	friend class ASTWriter;
427	friend class CXXRecordDecl;
428
429	/// A mapping to contain the template or declaration that
430	/// a variable declaration describes or was instantiated from,
431	/// respectively.
432	///
433	/// For non-templates, this value will be NULL. For variable
434	/// declarations that describe a variable template, this will be a
435	/// pointer to a VarTemplateDecl. For static data members
436	/// of class template specializations, this will be the
437	/// MemberSpecializationInfo referring to the member variable that was
438	/// instantiated or specialized. Thus, the mapping will keep track of
439	/// the static data member templates from which static data members of
440	/// class template specializations were instantiated.
441	///
442	/// Given the following example:
443	///
444	/// \code
445	/// template<typename T>
446	/// struct X {
447	/// static T value;
448	/// };
449	///
450	/// template<typename T>
451	/// T X<T>::value = T(17);
452	///
453	/// int *x = &X<int>::value;
454	/// \endcode
455	///
456	/// This mapping will contain an entry that maps from the VarDecl for
457	/// X<int>::value to the corresponding VarDecl for X<T>::value (within the
458	/// class template X) and will be marked TSK_ImplicitInstantiation.
459	llvm::DenseMap<const VarDecl *, TemplateOrSpecializationInfo>
460	TemplateOrInstantiation;
461
462	/// Keeps track of the declaration from which a using declaration was
463	/// created during instantiation.
464	///
465	/// The source and target declarations are always a UsingDecl, an
466	/// UnresolvedUsingValueDecl, or an UnresolvedUsingTypenameDecl.
467	///
468	/// For example:
469	/// \code
470	/// template<typename T>
471	/// struct A {
472	/// void f();
473	/// };
474	///
475	/// template<typename T>
476	/// struct B : A<T> {
477	/// using A<T>::f;
478	/// };
479	///
480	/// template struct B<int>;
481	/// \endcode
482	///
483	/// This mapping will contain an entry that maps from the UsingDecl in
484	/// B<int> to the UnresolvedUsingDecl in B<T>.
485	llvm::DenseMap<NamedDecl , NamedDecl > InstantiatedFromUsingDecl;
486
487	llvm::DenseMap<UsingShadowDecl, UsingShadowDecl>
488	InstantiatedFromUsingShadowDecl;
489
490	llvm::DenseMap<FieldDecl , FieldDecl > InstantiatedFromUnnamedFieldDecl;
491
492	/// Mapping that stores the methods overridden by a given C++
493	/// member function.
494	///
495	/// Since most C++ member functions aren't virtual and therefore
496	/// don't override anything, we store the overridden functions in
497	/// this map on the side rather than within the CXXMethodDecl structure.
498	using CXXMethodVector = llvm::TinyPtrVector<const CXXMethodDecl *>;
499	llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector> OverriddenMethods;
500
501	/// Mapping from each declaration context to its corresponding
502	/// mangling numbering context (used for constructs like lambdas which
503	/// need to be consistently numbered for the mangler).
504	llvm::DenseMap<const DeclContext *, std::unique_ptr<MangleNumberingContext>>
505	MangleNumberingContexts;
506
507	/// Side-table of mangling numbers for declarations which rarely
508	/// need them (like static local vars).
509	llvm::MapVector<const NamedDecl *, unsigned> MangleNumbers;
510	llvm::MapVector<const VarDecl *, unsigned> StaticLocalNumbers;
511
512	/// Mapping that stores parameterIndex values for ParmVarDecls when
513	/// that value exceeds the bitfield size of ParmVarDeclBits.ParameterIndex.
514	using ParameterIndexTable = llvm::DenseMap<const VarDecl *, unsigned>;
515	ParameterIndexTable ParamIndices;
516
517	ImportDecl *FirstLocalImport = nullptr;
518	ImportDecl *LastLocalImport = nullptr;
519
520	TranslationUnitDecl *TUDecl;
521	mutable ExternCContextDecl *ExternCContext = nullptr;
522	mutable BuiltinTemplateDecl *MakeIntegerSeqDecl = nullptr;
523	mutable BuiltinTemplateDecl *TypePackElementDecl = nullptr;
524
525	/// The associated SourceManager object.
526	SourceManager &SourceMgr;
527
528	/// The language options used to create the AST associated with
529	/// this ASTContext object.
530	LangOptions &LangOpts;
531
532	/// Blacklist object that is used by sanitizers to decide which
533	/// entities should not be instrumented.
534	std::unique_ptr<SanitizerBlacklist> SanitizerBL;
535
536	/// Function filtering mechanism to determine whether a given function
537	/// should be imbued with the XRay "always" or "never" attributes.
538	std::unique_ptr<XRayFunctionFilter> XRayFilter;
539
540	/// The allocator used to create AST objects.
541	///
542	/// AST objects are never destructed; rather, all memory associated with the
543	/// AST objects will be released when the ASTContext itself is destroyed.
544	mutable llvm::BumpPtrAllocator BumpAlloc;
545
546	/// Allocator for partial diagnostics.
547	PartialDiagnostic::StorageAllocator DiagAllocator;
548
549	/// The current C++ ABI.
550	std::unique_ptr<CXXABI> ABI;
551	CXXABI *createCXXABI(const TargetInfo &T);
552
553	/// The logical -> physical address space map.
554	const LangASMap *AddrSpaceMap = nullptr;
555
556	/// Address space map mangling must be used with language specific
557	/// address spaces (e.g. OpenCL/CUDA)
558	bool AddrSpaceMapMangling;
559
560	const TargetInfo *Target = nullptr;
561	const TargetInfo *AuxTarget = nullptr;
562	clang::PrintingPolicy PrintingPolicy;
563
564	public:
565	IdentifierTable &Idents;
566	SelectorTable &Selectors;
567	Builtin::Context &BuiltinInfo;
568	mutable DeclarationNameTable DeclarationNames;
569	IntrusiveRefCntPtr<ExternalASTSource> ExternalSource;
570	ASTMutationListener *Listener = nullptr;
571
572	/// Container for either a single DynTypedNode or for an ArrayRef to
573	/// DynTypedNode. For use with ParentMap.
574	class DynTypedNodeList {
575	using DynTypedNode = ast_type_traits::DynTypedNode;
576
577	llvm::AlignedCharArrayUnion<ast_type_traits::DynTypedNode,
578	ArrayRef<DynTypedNode>> Storage;
579	bool IsSingleNode;
580
581	public:
582	DynTypedNodeList(const DynTypedNode &N) : IsSingleNode(true) {
583	new (Storage.buffer) DynTypedNode(N);
584	}
585
586	DynTypedNodeList(ArrayRef<DynTypedNode> A) : IsSingleNode(false) {
587	new (Storage.buffer) ArrayRef<DynTypedNode>(A);
588	}
589
590	const ast_type_traits::DynTypedNode *begin() const {
591	if (!IsSingleNode)
592	return reinterpret_cast<const ArrayRef<DynTypedNode> *>(Storage.buffer)
593	->begin();
594	return reinterpret_cast<const DynTypedNode *>(Storage.buffer);
595	}
596
597	const ast_type_traits::DynTypedNode *end() const {
598	if (!IsSingleNode)
599	return reinterpret_cast<const ArrayRef<DynTypedNode> *>(Storage.buffer)
600	->end();
601	return reinterpret_cast<const DynTypedNode *>(Storage.buffer) + 1;
602	}
603
604	size_t size() const { return end() - begin(); }
605	bool empty() const { return begin() == end(); }
606
607	const DynTypedNode &operator[](size_t N) const {
608	(0) . __assert_fail ("N < size() && \"Out of bounds!\"", "/home/seafit/code_projects/clang_source/clang/include/clang/AST/ASTContext.h", 608, __PRETTY_FUNCTION__))" file_link="../../../../include/assert.h.html#88" macro="true">assert(N < size() && "Out of bounds!");
609	return *(begin() + N);
610	}
611	};
612
613	// A traversal scope limits the parts of the AST visible to certain analyses.
614	// RecursiveASTVisitor::TraverseAST will only visit reachable nodes, and
615	// getParents() will only observe reachable parent edges.
616	//
617	// The scope is defined by a set of "top-level" declarations.
618	// Initially, it is the entire TU: {getTranslationUnitDecl()}.
619	// Changing the scope clears the parent cache, which is expensive to rebuild.
620	std::vector<Decl *> getTraversalScope() const { return TraversalScope; }
621	void setTraversalScope(const std::vector<Decl *> &);
622
623	/// Returns the parents of the given node (within the traversal scope).
624	///
625	/// Note that this will lazily compute the parents of all nodes
626	/// and store them for later retrieval. Thus, the first call is O(n)
627	/// in the number of AST nodes.
628	///
629	/// Caveats and FIXMEs:
630	/// Calculating the parent map over all AST nodes will need to load the
631	/// full AST. This can be undesirable in the case where the full AST is
632	/// expensive to create (for example, when using precompiled header
633	/// preambles). Thus, there are good opportunities for optimization here.
634	/// One idea is to walk the given node downwards, looking for references
635	/// to declaration contexts - once a declaration context is found, compute
636	/// the parent map for the declaration context; if that can satisfy the
637	/// request, loading the whole AST can be avoided. Note that this is made
638	/// more complex by statements in templates having multiple parents - those
639	/// problems can be solved by building closure over the templated parts of
640	/// the AST, which also avoids touching large parts of the AST.
641	/// Additionally, we will want to add an interface to already give a hint
642	/// where to search for the parents, for example when looking at a statement
643	/// inside a certain function.
644	///
645	/// 'NodeT' can be one of Decl, Stmt, Type, TypeLoc,
646	/// NestedNameSpecifier or NestedNameSpecifierLoc.
647	template <typename NodeT> DynTypedNodeList getParents(const NodeT &Node) {
648	return getParents(ast_type_traits::DynTypedNode::create(Node));
649	}
650
651	DynTypedNodeList getParents(const ast_type_traits::DynTypedNode &Node);
652
653	const clang::PrintingPolicy &getPrintingPolicy() const {
654	return PrintingPolicy;
655	}
656
657	void setPrintingPolicy(const clang::PrintingPolicy &Policy) {
658	PrintingPolicy = Policy;
659	}
660
661	SourceManager& getSourceManager() { return SourceMgr; }
662	const SourceManager& getSourceManager() const { return SourceMgr; }
663
664	llvm::BumpPtrAllocator &getAllocator() const {
665	return BumpAlloc;
666	}
667
668	void *Allocate(size_t Size, unsigned Align = 8) const {
669	return BumpAlloc.Allocate(Size, Align);
670	}
671	template <typename T> T *Allocate(size_t Num = 1) const {
672	return static_cast<T >(Allocate(Num sizeof(T), alignof(T)));
673	}
674	void Deallocate(void *Ptr) const {}
675
676	/// Return the total amount of physical memory allocated for representing
677	/// AST nodes and type information.
678	size_t getASTAllocatedMemory() const {
679	return BumpAlloc.getTotalMemory();
680	}
681
682	/// Return the total memory used for various side tables.
683	size_t getSideTableAllocatedMemory() const;
684
685	PartialDiagnostic::StorageAllocator &getDiagAllocator() {
686	return DiagAllocator;
687	}
688
689	const TargetInfo &getTargetInfo() const { return *Target; }
690	const TargetInfo *getAuxTargetInfo() const { return AuxTarget; }
691
692	/// getIntTypeForBitwidth -
693	/// sets integer QualTy according to specified details:
694	/// bitwidth, signed/unsigned.
695	/// Returns empty type if there is no appropriate target types.
696	QualType getIntTypeForBitwidth(unsigned DestWidth,
697	unsigned Signed) const;
698
699	/// getRealTypeForBitwidth -
700	/// sets floating point QualTy according to specified bitwidth.
701	/// Returns empty type if there is no appropriate target types.
702	QualType getRealTypeForBitwidth(unsigned DestWidth) const;
703
704	bool AtomicUsesUnsupportedLibcall(const AtomicExpr *E) const;
705
706	const LangOptions& getLangOpts() const { return LangOpts; }
707
708	const SanitizerBlacklist &getSanitizerBlacklist() const {
709	return *SanitizerBL;
710	}
711
712	const XRayFunctionFilter &getXRayFilter() const {
713	return *XRayFilter;
714	}
715
716	DiagnosticsEngine &getDiagnostics() const;
717
718	FullSourceLoc getFullLoc(SourceLocation Loc) const {
719	return FullSourceLoc(Loc,SourceMgr);
720	}
721
722	/// All comments in this translation unit.
723	RawCommentList Comments;
724
725	/// True if comments are already loaded from ExternalASTSource.
726	mutable bool CommentsLoaded = false;
727
728	class RawCommentAndCacheFlags {
729	public:
730	enum Kind {
731	/// We searched for a comment attached to the particular declaration, but
732	/// didn't find any.
733	///
734	/// getRaw() == 0.
735	NoCommentInDecl = 0,
736
737	/// We have found a comment attached to this particular declaration.
738	///
739	/// getRaw() != 0.
740	FromDecl,
741
742	/// This declaration does not have an attached comment, and we have
743	/// searched the redeclaration chain.
744	///
745	/// If getRaw() == 0, the whole redeclaration chain does not have any
746	/// comments.
747	///
748	/// If getRaw() != 0, it is a comment propagated from other
749	/// redeclaration.
750	FromRedecl
751	};
752
753	Kind getKind() const LLVM_READONLY {
754	return Data.getInt();
755	}
756
757	void setKind(Kind K) {
758	Data.setInt(K);
759	}
760
761	const RawComment *getRaw() const LLVM_READONLY {
762	return Data.getPointer();
763	}
764
765	void setRaw(const RawComment *RC) {
766	Data.setPointer(RC);
767	}
768
769	const Decl *getOriginalDecl() const LLVM_READONLY {
770	return OriginalDecl;
771	}
772
773	void setOriginalDecl(const Decl *Orig) {
774	OriginalDecl = Orig;
775	}
776
777	private:
778	llvm::PointerIntPair<const RawComment *, 2, Kind> Data;
779	const Decl *OriginalDecl;
780	};
781
782	/// Mapping from declarations to comments attached to any
783	/// redeclaration.
784	///
785	/// Raw comments are owned by Comments list. This mapping is populated
786	/// lazily.
787	mutable llvm::DenseMap<const Decl *, RawCommentAndCacheFlags> RedeclComments;
788
789	/// Mapping from declarations to parsed comments attached to any
790	/// redeclaration.
791	mutable llvm::DenseMap<const Decl , comments::FullComment > ParsedComments;
792
793	/// Return the documentation comment attached to a given declaration,
794	/// without looking into cache.
795	RawComment getRawCommentForDeclNoCache(const Decl D) const;
796
797	public:
798	RawCommentList &getRawCommentList() {
799	return Comments;
800	}
801
802	void addComment(const RawComment &RC) {
803	assert(LangOpts.RetainCommentsFromSystemHeaders \|\|
804	!SourceMgr.isInSystemHeader(RC.getSourceRange().getBegin()));
805	Comments.addComment(RC, LangOpts.CommentOpts, BumpAlloc);
806	}
807
808	/// Return the documentation comment attached to a given declaration.
809	/// Returns nullptr if no comment is attached.
810	///
811	/// \param OriginalDecl if not nullptr, is set to declaration AST node that
812	/// had the comment, if the comment we found comes from a redeclaration.
813	const RawComment *
814	getRawCommentForAnyRedecl(const Decl *D,
815	const Decl **OriginalDecl = nullptr) const;
816
817	/// Return parsed documentation comment attached to a given declaration.
818	/// Returns nullptr if no comment is attached.
819	///
820	/// \param PP the Preprocessor used with this TU. Could be nullptr if
821	/// preprocessor is not available.
822	comments::FullComment getCommentForDecl(const Decl D,
823	const Preprocessor *PP) const;
824
825	/// Return parsed documentation comment attached to a given declaration.
826	/// Returns nullptr if no comment is attached. Does not look at any
827	/// redeclarations of the declaration.
828	comments::FullComment getLocalCommentForDeclUncached(const Decl D) const;
829
830	comments::FullComment cloneFullComment(comments::FullComment FC,
831	const Decl *D) const;
832
833	private:
834	mutable comments::CommandTraits CommentCommandTraits;
835
836	/// Iterator that visits import declarations.
837	class import_iterator {
838	ImportDecl *Import = nullptr;
839
840	public:
841	using value_type = ImportDecl *;
842	using reference = ImportDecl *;
843	using pointer = ImportDecl *;
844	using difference_type = int;
845	using iterator_category = std::forward_iterator_tag;
846
847	import_iterator() = default;
848	explicit import_iterator(ImportDecl *Import) : Import(Import) {}
849
850	reference operator*() const { return Import; }
851	pointer operator->() const { return Import; }
852
853	import_iterator &operator++() {
854	Import = ASTContext::getNextLocalImport(Import);
855	return *this;
856	}
857
858	import_iterator operator++(int) {
859	import_iterator Other(*this);
860	++(*this);
861	return Other;
862	}
863
864	friend bool operator==(import_iterator X, import_iterator Y) {
865	return X.Import == Y.Import;
866	}
867
868	friend bool operator!=(import_iterator X, import_iterator Y) {
869	return X.Import != Y.Import;
870	}
871	};
872
873	public:
874	comments::CommandTraits &getCommentCommandTraits() const {
875	return CommentCommandTraits;
876	}
877
878	/// Retrieve the attributes for the given declaration.
879	AttrVec& getDeclAttrs(const Decl *D);
880
881	/// Erase the attributes corresponding to the given declaration.
882	void eraseDeclAttrs(const Decl *D);
883
884	/// If this variable is an instantiated static data member of a
885	/// class template specialization, returns the templated static data member
886	/// from which it was instantiated.
887	// FIXME: Remove ?
888	MemberSpecializationInfo *getInstantiatedFromStaticDataMember(
889	const VarDecl *Var);
890
891	TemplateOrSpecializationInfo
892	getTemplateOrSpecializationInfo(const VarDecl *Var);
893
894	FunctionDecl getClassScopeSpecializationPattern(const FunctionDecl FD);
895
896	void setClassScopeSpecializationPattern(FunctionDecl *FD,
897	FunctionDecl *Pattern);
898
899	/// Note that the static data member \p Inst is an instantiation of
900	/// the static data member template \p Tmpl of a class template.
901	void setInstantiatedFromStaticDataMember(VarDecl Inst, VarDecl Tmpl,
902	TemplateSpecializationKind TSK,
903	SourceLocation PointOfInstantiation = SourceLocation());
904
905	void setTemplateOrSpecializationInfo(VarDecl *Inst,
906	TemplateOrSpecializationInfo TSI);
907
908	/// If the given using decl \p Inst is an instantiation of a
909	/// (possibly unresolved) using decl from a template instantiation,
910	/// return it.
911	NamedDecl getInstantiatedFromUsingDecl(NamedDecl Inst);
912
913	/// Remember that the using decl \p Inst is an instantiation
914	/// of the using decl \p Pattern of a class template.
915	void setInstantiatedFromUsingDecl(NamedDecl Inst, NamedDecl Pattern);
916
917	void setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst,
918	UsingShadowDecl *Pattern);
919	UsingShadowDecl getInstantiatedFromUsingShadowDecl(UsingShadowDecl Inst);
920
921	FieldDecl getInstantiatedFromUnnamedFieldDecl(FieldDecl Field);
922
923	void setInstantiatedFromUnnamedFieldDecl(FieldDecl Inst, FieldDecl Tmpl);
924
925	// Access to the set of methods overridden by the given C++ method.
926	using overridden_cxx_method_iterator = CXXMethodVector::const_iterator;
927	overridden_cxx_method_iterator
928	overridden_methods_begin(const CXXMethodDecl *Method) const;
929
930	overridden_cxx_method_iterator
931	overridden_methods_end(const CXXMethodDecl *Method) const;
932
933	unsigned overridden_methods_size(const CXXMethodDecl *Method) const;
934
935	using overridden_method_range =
936	llvm::iterator_range<overridden_cxx_method_iterator>;
937
938	overridden_method_range overridden_methods(const CXXMethodDecl *Method) const;
939
940	/// Note that the given C++ \p Method overrides the given \p
941	/// Overridden method.
942	void addOverriddenMethod(const CXXMethodDecl *Method,
943	const CXXMethodDecl *Overridden);
944
945	/// Return C++ or ObjC overridden methods for the given \p Method.
946	///
947	/// An ObjC method is considered to override any method in the class's
948	/// base classes, its protocols, or its categories' protocols, that has
949	/// the same selector and is of the same kind (class or instance).
950	/// A method in an implementation is not considered as overriding the same
951	/// method in the interface or its categories.
952	void getOverriddenMethods(
953	const NamedDecl *Method,
954	SmallVectorImpl<const NamedDecl *> &Overridden) const;
955
956	/// Notify the AST context that a new import declaration has been
957	/// parsed or implicitly created within this translation unit.
958	void addedLocalImportDecl(ImportDecl *Import);
959
960	static ImportDecl getNextLocalImport(ImportDecl Import) {
961	return Import->NextLocalImport;
962	}
963
964	using import_range = llvm::iterator_range<import_iterator>;
965
966	import_range local_imports() const {
967	return import_range(import_iterator(FirstLocalImport), import_iterator());
968	}
969
970	Decl getPrimaryMergedDecl(Decl D) {
971	Decl *Result = MergedDecls.lookup(D);
972	return Result ? Result : D;
973	}
974	void setPrimaryMergedDecl(Decl D, Decl Primary) {
975	MergedDecls[D] = Primary;
976	}
977
978	/// Note that the definition \p ND has been merged into module \p M,
979	/// and should be visible whenever \p M is visible.
980	void mergeDefinitionIntoModule(NamedDecl ND, Module M,
981	bool NotifyListeners = true);
982
983	/// Clean up the merged definition list. Call this if you might have
984	/// added duplicates into the list.
985	void deduplicateMergedDefinitonsFor(NamedDecl *ND);
986
987	/// Get the additional modules in which the definition \p Def has
988	/// been merged.
989	ArrayRef<Module> getModulesWithMergedDefinition(const NamedDecl Def) {
990	auto MergedIt =
991	MergedDefModules.find(cast<NamedDecl>(Def->getCanonicalDecl()));
992	if (MergedIt == MergedDefModules.end())
993	return None;
994	return MergedIt->second;
995	}
996
997	/// Add a declaration to the list of declarations that are initialized
998	/// for a module. This will typically be a global variable (with internal
999	/// linkage) that runs module initializers, such as the iostream initializer,
1000	/// or an ImportDecl nominating another module that has initializers.
1001	void addModuleInitializer(Module M, Decl Init);
1002
1003	void addLazyModuleInitializers(Module *M, ArrayRef<uint32_t> IDs);
1004
1005	/// Get the initializations to perform when importing a module, if any.
1006	ArrayRef<Decl> getModuleInitializers(Module M);
1007
1008	TranslationUnitDecl *getTranslationUnitDecl() const { return TUDecl; }
1009
1010	ExternCContextDecl *getExternCContextDecl() const;
1011	BuiltinTemplateDecl *getMakeIntegerSeqDecl() const;
1012	BuiltinTemplateDecl *getTypePackElementDecl() const;
1013
1014	// Builtin Types.
1015	CanQualType VoidTy;
1016	CanQualType BoolTy;
1017	CanQualType CharTy;
1018	CanQualType WCharTy; // [C++ 3.9.1p5].
1019	CanQualType WideCharTy; // Same as WCharTy in C++, integer type in C99.
1020	CanQualType WIntTy; // [C99 7.24.1], integer type unchanged by default promotions.
1021	CanQualType Char8Ty; // [C++20 proposal]
1022	CanQualType Char16Ty; // [C++0x 3.9.1p5], integer type in C99.
1023	CanQualType Char32Ty; // [C++0x 3.9.1p5], integer type in C99.
1024	CanQualType SignedCharTy, ShortTy, IntTy, LongTy, LongLongTy, Int128Ty;
1025	CanQualType UnsignedCharTy, UnsignedShortTy, UnsignedIntTy, UnsignedLongTy;
1026	CanQualType UnsignedLongLongTy, UnsignedInt128Ty;
1027	CanQualType FloatTy, DoubleTy, LongDoubleTy, Float128Ty;
1028	CanQualType ShortAccumTy, AccumTy,
1029	LongAccumTy; // ISO/IEC JTC1 SC22 WG14 N1169 Extension
1030	CanQualType UnsignedShortAccumTy, UnsignedAccumTy, UnsignedLongAccumTy;
1031	CanQualType ShortFractTy, FractTy, LongFractTy;
1032	CanQualType UnsignedShortFractTy, UnsignedFractTy, UnsignedLongFractTy;
1033	CanQualType SatShortAccumTy, SatAccumTy, SatLongAccumTy;
1034	CanQualType SatUnsignedShortAccumTy, SatUnsignedAccumTy,
1035	SatUnsignedLongAccumTy;
1036	CanQualType SatShortFractTy, SatFractTy, SatLongFractTy;
1037	CanQualType SatUnsignedShortFractTy, SatUnsignedFractTy,
1038	SatUnsignedLongFractTy;
1039	CanQualType HalfTy; // [OpenCL 6.1.1.1], ARM NEON
1040	CanQualType Float16Ty; // C11 extension ISO/IEC TS 18661-3
1041	CanQualType FloatComplexTy, DoubleComplexTy, LongDoubleComplexTy;
1042	CanQualType Float128ComplexTy;
1043	CanQualType VoidPtrTy, NullPtrTy;
1044	CanQualType DependentTy, OverloadTy, BoundMemberTy, UnknownAnyTy;
1045	CanQualType BuiltinFnTy;
1046	CanQualType PseudoObjectTy, ARCUnbridgedCastTy;
1047	CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy;
1048	CanQualType ObjCBuiltinBoolTy;
1049	#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
1050	CanQualType SingletonId;
1051	#include "clang/Basic/OpenCLImageTypes.def"
1052	CanQualType OCLSamplerTy, OCLEventTy, OCLClkEventTy;
1053	CanQualType OCLQueueTy, OCLReserveIDTy;
1054	CanQualType OMPArraySectionTy;
1055	#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
1056	CanQualType Id##Ty;
1057	#include "clang/Basic/OpenCLExtensionTypes.def"
1058
1059	// Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand.
1060	mutable QualType AutoDeductTy; // Deduction against 'auto'.
1061	mutable QualType AutoRRefDeductTy; // Deduction against 'auto &&'.
1062
1063	// Decl used to help define __builtin_va_list for some targets.
1064	// The decl is built when constructing 'BuiltinVaListDecl'.
1065	mutable Decl *VaListTagDecl;
1066
1067	ASTContext(LangOptions &LOpts, SourceManager &SM, IdentifierTable &idents,
1068	SelectorTable &sels, Builtin::Context &builtins);
1069	ASTContext(const ASTContext &) = delete;
1070	ASTContext &operator=(const ASTContext &) = delete;
1071	~ASTContext();
1072
1073	/// Attach an external AST source to the AST context.
1074	///
1075	/// The external AST source provides the ability to load parts of
1076	/// the abstract syntax tree as needed from some external storage,
1077	/// e.g., a precompiled header.
1078	void setExternalSource(IntrusiveRefCntPtr<ExternalASTSource> Source);
1079
1080	/// Retrieve a pointer to the external AST source associated
1081	/// with this AST context, if any.
1082	ExternalASTSource *getExternalSource() const {
1083	return ExternalSource.get();
1084	}
1085
1086	/// Attach an AST mutation listener to the AST context.
1087	///
1088	/// The AST mutation listener provides the ability to track modifications to
1089	/// the abstract syntax tree entities committed after they were initially
1090	/// created.
1091	void setASTMutationListener(ASTMutationListener *Listener) {
1092	this->Listener = Listener;
1093	}
1094
1095	/// Retrieve a pointer to the AST mutation listener associated
1096	/// with this AST context, if any.
1097	ASTMutationListener *getASTMutationListener() const { return Listener; }
1098
1099	void PrintStats() const;
1100	const SmallVectorImpl<Type *>& getTypes() const { return Types; }
1101
1102	BuiltinTemplateDecl *buildBuiltinTemplateDecl(BuiltinTemplateKind BTK,
1103	const IdentifierInfo *II) const;
1104
1105	/// Create a new implicit TU-level CXXRecordDecl or RecordDecl
1106	/// declaration.
1107	RecordDecl *buildImplicitRecord(StringRef Name,
1108	RecordDecl::TagKind TK = TTK_Struct) const;
1109
1110	/// Create a new implicit TU-level typedef declaration.
1111	TypedefDecl *buildImplicitTypedef(QualType T, StringRef Name) const;
1112
1113	/// Retrieve the declaration for the 128-bit signed integer type.
1114	TypedefDecl *getInt128Decl() const;
1115
1116	/// Retrieve the declaration for the 128-bit unsigned integer type.
1117	TypedefDecl *getUInt128Decl() const;
1118
1119	//===--------------------------------------------------------------------===//
1120	// Type Constructors
1121	//===--------------------------------------------------------------------===//
1122
1123	private:
1124	/// Return a type with extended qualifiers.
1125	QualType getExtQualType(const Type *Base, Qualifiers Quals) const;
1126
1127	QualType getTypeDeclTypeSlow(const TypeDecl *Decl) const;
1128
1129	QualType getPipeType(QualType T, bool ReadOnly) const;
1130
1131	public:
1132	/// Return the uniqued reference to the type for an address space
1133	/// qualified type with the specified type and address space.
1134	///
1135	/// The resulting type has a union of the qualifiers from T and the address
1136	/// space. If T already has an address space specifier, it is silently
1137	/// replaced.
1138	QualType getAddrSpaceQualType(QualType T, LangAS AddressSpace) const;
1139
1140	/// Remove any existing address space on the type and returns the type
1141	/// with qualifiers intact (or that's the idea anyway)
1142	///
1143	/// The return type should be T with all prior qualifiers minus the address
1144	/// space.
1145	QualType removeAddrSpaceQualType(QualType T) const;
1146
1147	/// Apply Objective-C protocol qualifiers to the given type.
1148	/// \param allowOnPointerType specifies if we can apply protocol
1149	/// qualifiers on ObjCObjectPointerType. It can be set to true when
1150	/// constructing the canonical type of a Objective-C type parameter.
1151	QualType applyObjCProtocolQualifiers(QualType type,
1152	ArrayRef<ObjCProtocolDecl *> protocols, bool &hasError,
1153	bool allowOnPointerType = false) const;
1154
1155	/// Return the uniqued reference to the type for an Objective-C
1156	/// gc-qualified type.
1157	///
1158	/// The resulting type has a union of the qualifiers from T and the gc
1159	/// attribute.
1160	QualType getObjCGCQualType(QualType T, Qualifiers::GC gcAttr) const;
1161
1162	/// Return the uniqued reference to the type for a \c restrict
1163	/// qualified type.
1164	///
1165	/// The resulting type has a union of the qualifiers from \p T and
1166	/// \c restrict.
1167	QualType getRestrictType(QualType T) const {
1168	return T.withFastQualifiers(Qualifiers::Restrict);
1169	}
1170
1171	/// Return the uniqued reference to the type for a \c volatile
1172	/// qualified type.
1173	///
1174	/// The resulting type has a union of the qualifiers from \p T and
1175	/// \c volatile.
1176	QualType getVolatileType(QualType T) const {
1177	return T.withFastQualifiers(Qualifiers::Volatile);
1178	}
1179
1180	/// Return the uniqued reference to the type for a \c const
1181	/// qualified type.
1182	///
1183	/// The resulting type has a union of the qualifiers from \p T and \c const.
1184	///
1185	/// It can be reasonably expected that this will always be equivalent to
1186	/// calling T.withConst().
1187	QualType getConstType(QualType T) const { return T.withConst(); }
1188
1189	/// Change the ExtInfo on a function type.
1190	const FunctionType adjustFunctionType(const FunctionType Fn,
1191	FunctionType::ExtInfo EInfo);
1192
1193	/// Adjust the given function result type.
1194	CanQualType getCanonicalFunctionResultType(QualType ResultType) const;
1195
1196	/// Change the result type of a function type once it is deduced.
1197	void adjustDeducedFunctionResultType(FunctionDecl *FD, QualType ResultType);
1198
1199	/// Get a function type and produce the equivalent function type with the
1200	/// specified exception specification. Type sugar that can be present on a
1201	/// declaration of a function with an exception specification is permitted
1202	/// and preserved. Other type sugar (for instance, typedefs) is not.
1203	QualType getFunctionTypeWithExceptionSpec(
1204	QualType Orig, const FunctionProtoType::ExceptionSpecInfo &ESI);
1205
1206	/// Determine whether two function types are the same, ignoring
1207	/// exception specifications in cases where they're part of the type.
1208	bool hasSameFunctionTypeIgnoringExceptionSpec(QualType T, QualType U);
1209
1210	/// Change the exception specification on a function once it is
1211	/// delay-parsed, instantiated, or computed.
1212	void adjustExceptionSpec(FunctionDecl *FD,
1213	const FunctionProtoType::ExceptionSpecInfo &ESI,
1214	bool AsWritten = false);
1215
1216	/// Return the uniqued reference to the type for a complex
1217	/// number with the specified element type.
1218	QualType getComplexType(QualType T) const;
1219	CanQualType getComplexType(CanQualType T) const {
1220	return CanQualType::CreateUnsafe(getComplexType((QualType) T));
1221	}
1222
1223	/// Return the uniqued reference to the type for a pointer to
1224	/// the specified type.
1225	QualType getPointerType(QualType T) const;
1226	CanQualType getPointerType(CanQualType T) const {
1227	return CanQualType::CreateUnsafe(getPointerType((QualType) T));
1228	}
1229
1230	/// Return the uniqued reference to a type adjusted from the original
1231	/// type to a new type.
1232	QualType getAdjustedType(QualType Orig, QualType New) const;
1233	CanQualType getAdjustedType(CanQualType Orig, CanQualType New) const {
1234	return CanQualType::CreateUnsafe(
1235	getAdjustedType((QualType)Orig, (QualType)New));
1236	}
1237
1238	/// Return the uniqued reference to the decayed version of the given
1239	/// type. Can only be called on array and function types which decay to
1240	/// pointer types.
1241	QualType getDecayedType(QualType T) const;
1242	CanQualType getDecayedType(CanQualType T) const {
1243	return CanQualType::CreateUnsafe(getDecayedType((QualType) T));
1244	}
1245
1246	/// Return the uniqued reference to the atomic type for the specified
1247	/// type.
1248	QualType getAtomicType(QualType T) const;
1249
1250	/// Return the uniqued reference to the type for a block of the
1251	/// specified type.
1252	QualType getBlockPointerType(QualType T) const;
1253
1254	/// Gets the struct used to keep track of the descriptor for pointer to
1255	/// blocks.
1256	QualType getBlockDescriptorType() const;
1257
1258	/// Return a read_only pipe type for the specified type.
1259	QualType getReadPipeType(QualType T) const;
1260
1261	/// Return a write_only pipe type for the specified type.
1262	QualType getWritePipeType(QualType T) const;
1263
1264	/// Gets the struct used to keep track of the extended descriptor for
1265	/// pointer to blocks.
1266	QualType getBlockDescriptorExtendedType() const;
1267
1268	/// Map an AST Type to an OpenCLTypeKind enum value.
1269	TargetInfo::OpenCLTypeKind getOpenCLTypeKind(const Type *T) const;
1270
1271	/// Get address space for OpenCL type.
1272	LangAS getOpenCLTypeAddrSpace(const Type *T) const;
1273
1274	void setcudaConfigureCallDecl(FunctionDecl *FD) {
1275	cudaConfigureCallDecl = FD;
1276	}
1277
1278	FunctionDecl *getcudaConfigureCallDecl() {
1279	return cudaConfigureCallDecl;
1280	}
1281
1282	/// Returns true iff we need copy/dispose helpers for the given type.
1283	bool BlockRequiresCopying(QualType Ty, const VarDecl *D);
1284
1285	/// Returns true, if given type has a known lifetime. HasByrefExtendedLayout
1286	/// is set to false in this case. If HasByrefExtendedLayout returns true,
1287	/// byref variable has extended lifetime.
1288	bool getByrefLifetime(QualType Ty,
1289	Qualifiers::ObjCLifetime &Lifetime,
1290	bool &HasByrefExtendedLayout) const;
1291
1292	/// Return the uniqued reference to the type for an lvalue reference
1293	/// to the specified type.
1294	QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true)
1295	const;
1296
1297	/// Return the uniqued reference to the type for an rvalue reference
1298	/// to the specified type.
1299	QualType getRValueReferenceType(QualType T) const;
1300
1301	/// Return the uniqued reference to the type for a member pointer to
1302	/// the specified type in the specified class.
1303	///
1304	/// The class \p Cls is a \c Type because it could be a dependent name.
1305	QualType getMemberPointerType(QualType T, const Type *Cls) const;
1306
1307	/// Return a non-unique reference to the type for a variable array of
1308	/// the specified element type.
1309	QualType getVariableArrayType(QualType EltTy, Expr *NumElts,
1310	ArrayType::ArraySizeModifier ASM,
1311	unsigned IndexTypeQuals,
1312	SourceRange Brackets) const;
1313
1314	/// Return a non-unique reference to the type for a dependently-sized
1315	/// array of the specified element type.
1316	///
1317	/// FIXME: We will need these to be uniqued, or at least comparable, at some
1318	/// point.
1319	QualType getDependentSizedArrayType(QualType EltTy, Expr *NumElts,
1320	ArrayType::ArraySizeModifier ASM,
1321	unsigned IndexTypeQuals,
1322	SourceRange Brackets) const;
1323
1324	/// Return a unique reference to the type for an incomplete array of
1325	/// the specified element type.
1326	QualType getIncompleteArrayType(QualType EltTy,
1327	ArrayType::ArraySizeModifier ASM,
1328	unsigned IndexTypeQuals) const;
1329
1330	/// Return the unique reference to the type for a constant array of
1331	/// the specified element type.
1332	QualType getConstantArrayType(QualType EltTy, const llvm::APInt &ArySize,
1333	ArrayType::ArraySizeModifier ASM,
1334	unsigned IndexTypeQuals) const;
1335
1336	/// Returns a vla type where known sizes are replaced with [*].
1337	QualType getVariableArrayDecayedType(QualType Ty) const;
1338
1339	/// Return the unique reference to a vector type of the specified
1340	/// element type and size.
1341	///
1342	/// \pre \p VectorType must be a built-in type.
1343	QualType getVectorType(QualType VectorType, unsigned NumElts,
1344	VectorType::VectorKind VecKind) const;
1345	/// Return the unique reference to the type for a dependently sized vector of
1346	/// the specified element type.
1347	QualType getDependentVectorType(QualType VectorType, Expr *SizeExpr,
1348	SourceLocation AttrLoc,
1349	VectorType::VectorKind VecKind) const;
1350
1351	/// Return the unique reference to an extended vector type
1352	/// of the specified element type and size.
1353	///
1354	/// \pre \p VectorType must be a built-in type.
1355	QualType getExtVectorType(QualType VectorType, unsigned NumElts) const;
1356
1357	/// \pre Return a non-unique reference to the type for a dependently-sized
1358	/// vector of the specified element type.
1359	///
1360	/// FIXME: We will need these to be uniqued, or at least comparable, at some
1361	/// point.
1362	QualType getDependentSizedExtVectorType(QualType VectorType,
1363	Expr *SizeExpr,
1364	SourceLocation AttrLoc) const;
1365
1366	QualType getDependentAddressSpaceType(QualType PointeeType,
1367	Expr *AddrSpaceExpr,
1368	SourceLocation AttrLoc) const;
1369
1370	/// Return a K&R style C function type like 'int()'.
1371	QualType getFunctionNoProtoType(QualType ResultTy,
1372	const FunctionType::ExtInfo &Info) const;
1373
1374	QualType getFunctionNoProtoType(QualType ResultTy) const {
1375	return getFunctionNoProtoType(ResultTy, FunctionType::ExtInfo());
1376	}
1377
1378	/// Return a normal function type with a typed argument list.
1379	QualType getFunctionType(QualType ResultTy, ArrayRef<QualType> Args,
1380	const FunctionProtoType::ExtProtoInfo &EPI) const {
1381	return getFunctionTypeInternal(ResultTy, Args, EPI, false);
1382	}
1383
1384	QualType adjustStringLiteralBaseType(QualType StrLTy) const;
1385
1386	private:
1387	/// Return a normal function type with a typed argument list.
1388	QualType getFunctionTypeInternal(QualType ResultTy, ArrayRef<QualType> Args,
1389	const FunctionProtoType::ExtProtoInfo &EPI,
1390	bool OnlyWantCanonical) const;
1391
1392	public:
1393	/// Return the unique reference to the type for the specified type
1394	/// declaration.
1395	QualType getTypeDeclType(const TypeDecl *Decl,
1396	const TypeDecl *PrevDecl = nullptr) const {
1397	(0) . __assert_fail ("Decl && \"Passed null for Decl param\"", "/home/seafit/code_projects/clang_source/clang/include/clang/AST/ASTContext.h", 1397, __PRETTY_FUNCTION__))" file_link="../../../../include/assert.h.html#88" macro="true">assert(Decl && "Passed null for Decl param");
1398	if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
1399
1400	if (PrevDecl) {
1401	(0) . __assert_fail ("PrevDecl->TypeForDecl && \"previous decl has no TypeForDecl\"", "/home/seafit/code_projects/clang_source/clang/include/clang/AST/ASTContext.h", 1401, __PRETTY_FUNCTION__))" file_link="../../../../include/assert.h.html#88" macro="true">assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl");
1402	Decl->TypeForDecl = PrevDecl->TypeForDecl;
1403	return QualType(PrevDecl->TypeForDecl, 0);
1404	}
1405
1406	return getTypeDeclTypeSlow(Decl);
1407	}
1408
1409	/// Return the unique reference to the type for the specified
1410	/// typedef-name decl.
1411	QualType getTypedefType(const TypedefNameDecl *Decl,
1412	QualType Canon = QualType()) const;
1413
1414	QualType getRecordType(const RecordDecl *Decl) const;
1415
1416	QualType getEnumType(const EnumDecl *Decl) const;
1417
1418	QualType getInjectedClassNameType(CXXRecordDecl *Decl, QualType TST) const;
1419
1420	QualType getAttributedType(attr::Kind attrKind,
1421	QualType modifiedType,
1422	QualType equivalentType);
1423
1424	QualType getSubstTemplateTypeParmType(const TemplateTypeParmType *Replaced,
1425	QualType Replacement) const;
1426	QualType getSubstTemplateTypeParmPackType(
1427	const TemplateTypeParmType *Replaced,
1428	const TemplateArgument &ArgPack);
1429
1430	QualType
1431	getTemplateTypeParmType(unsigned Depth, unsigned Index,
1432	bool ParameterPack,
1433	TemplateTypeParmDecl *ParmDecl = nullptr) const;
1434
1435	QualType getTemplateSpecializationType(TemplateName T,
1436	ArrayRef<TemplateArgument> Args,
1437	QualType Canon = QualType()) const;
1438
1439	QualType
1440	getCanonicalTemplateSpecializationType(TemplateName T,
1441	ArrayRef<TemplateArgument> Args) const;
1442
1443	QualType getTemplateSpecializationType(TemplateName T,
1444	const TemplateArgumentListInfo &Args,
1445	QualType Canon = QualType()) const;
1446
1447	TypeSourceInfo *
1448	getTemplateSpecializationTypeInfo(TemplateName T, SourceLocation TLoc,
1449	const TemplateArgumentListInfo &Args,
1450	QualType Canon = QualType()) const;
1451
1452	QualType getParenType(QualType NamedType) const;
1453
1454	QualType getElaboratedType(ElaboratedTypeKeyword Keyword,
1455	NestedNameSpecifier *NNS, QualType NamedType,
1456	TagDecl *OwnedTagDecl = nullptr) const;
1457	QualType getDependentNameType(ElaboratedTypeKeyword Keyword,
1458	NestedNameSpecifier *NNS,
1459	const IdentifierInfo *Name,
1460	QualType Canon = QualType()) const;
1461
1462	QualType getDependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword,
1463	NestedNameSpecifier *NNS,
1464	const IdentifierInfo *Name,
1465	const TemplateArgumentListInfo &Args) const;
1466	QualType getDependentTemplateSpecializationType(
1467	ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS,
1468	const IdentifierInfo *Name, ArrayRef<TemplateArgument> Args) const;
1469
1470	TemplateArgument getInjectedTemplateArg(NamedDecl *ParamDecl);
1471
1472	/// Get a template argument list with one argument per template parameter
1473	/// in a template parameter list, such as for the injected class name of
1474	/// a class template.
1475	void getInjectedTemplateArgs(const TemplateParameterList *Params,
1476	SmallVectorImpl<TemplateArgument> &Args);
1477
1478	QualType getPackExpansionType(QualType Pattern,
1479	Optional<unsigned> NumExpansions);
1480
1481	QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl,
1482	ObjCInterfaceDecl *PrevDecl = nullptr) const;
1483
1484	/// Legacy interface: cannot provide type arguments or __kindof.
1485	QualType getObjCObjectType(QualType Base,
1486	ObjCProtocolDecl * const *Protocols,
1487	unsigned NumProtocols) const;
1488
1489	QualType getObjCObjectType(QualType Base,
1490	ArrayRef<QualType> typeArgs,
1491	ArrayRef<ObjCProtocolDecl *> protocols,
1492	bool isKindOf) const;
1493
1494	QualType getObjCTypeParamType(const ObjCTypeParamDecl *Decl,
1495	ArrayRef<ObjCProtocolDecl *> protocols,
1496	QualType Canonical = QualType()) const;
1497
1498	bool ObjCObjectAdoptsQTypeProtocols(QualType QT, ObjCInterfaceDecl *Decl);
1499
1500	/// QIdProtocolsAdoptObjCObjectProtocols - Checks that protocols in
1501	/// QT's qualified-id protocol list adopt all protocols in IDecl's list
1502	/// of protocols.
1503	bool QIdProtocolsAdoptObjCObjectProtocols(QualType QT,
1504	ObjCInterfaceDecl *IDecl);
1505
1506	/// Return a ObjCObjectPointerType type for the given ObjCObjectType.
1507	QualType getObjCObjectPointerType(QualType OIT) const;
1508
1509	/// GCC extension.
1510	QualType getTypeOfExprType(Expr *e) const;
1511	QualType getTypeOfType(QualType t) const;
1512
1513	/// C++11 decltype.
1514	QualType getDecltypeType(Expr *e, QualType UnderlyingType) const;
1515
1516	/// Unary type transforms
1517	QualType getUnaryTransformType(QualType BaseType, QualType UnderlyingType,
1518	UnaryTransformType::UTTKind UKind) const;
1519
1520	/// C++11 deduced auto type.
1521	QualType getAutoType(QualType DeducedType, AutoTypeKeyword Keyword,
1522	bool IsDependent) const;
1523
1524	/// C++11 deduction pattern for 'auto' type.
1525	QualType getAutoDeductType() const;
1526
1527	/// C++11 deduction pattern for 'auto &&' type.
1528	QualType getAutoRRefDeductType() const;
1529
1530	/// C++17 deduced class template specialization type.
1531	QualType getDeducedTemplateSpecializationType(TemplateName Template,
1532	QualType DeducedType,
1533	bool IsDependent) const;
1534
1535	/// Return the unique reference to the type for the specified TagDecl
1536	/// (struct/union/class/enum) decl.
1537	QualType getTagDeclType(const TagDecl *Decl) const;
1538
1539	/// Return the unique type for "size_t" (C99 7.17), defined in
1540	/// <stddef.h>.
1541	///
1542	/// The sizeof operator requires this (C99 6.5.3.4p4).
1543	CanQualType getSizeType() const;
1544
1545	/// Return the unique signed counterpart of
1546	/// the integer type corresponding to size_t.
1547	CanQualType getSignedSizeType() const;
1548
1549	/// Return the unique type for "intmax_t" (C99 7.18.1.5), defined in
1550	/// <stdint.h>.
1551	CanQualType getIntMaxType() const;
1552
1553	/// Return the unique type for "uintmax_t" (C99 7.18.1.5), defined in
1554	/// <stdint.h>.
1555	CanQualType getUIntMaxType() const;
1556
1557	/// Return the unique wchar_t type available in C++ (and available as
1558	/// __wchar_t as a Microsoft extension).
1559	QualType getWCharType() const { return WCharTy; }
1560
1561	/// Return the type of wide characters. In C++, this returns the
1562	/// unique wchar_t type. In C99, this returns a type compatible with the type
1563	/// defined in <stddef.h> as defined by the target.
1564	QualType getWideCharType() const { return WideCharTy; }
1565
1566	/// Return the type of "signed wchar_t".
1567	///
1568	/// Used when in C++, as a GCC extension.
1569	QualType getSignedWCharType() const;
1570
1571	/// Return the type of "unsigned wchar_t".
1572	///
1573	/// Used when in C++, as a GCC extension.
1574	QualType getUnsignedWCharType() const;
1575
1576	/// In C99, this returns a type compatible with the type
1577	/// defined in <stddef.h> as defined by the target.
1578	QualType getWIntType() const { return WIntTy; }
1579
1580	/// Return a type compatible with "intptr_t" (C99 7.18.1.4),
1581	/// as defined by the target.
1582	QualType getIntPtrType() const;
1583
1584	/// Return a type compatible with "uintptr_t" (C99 7.18.1.4),
1585	/// as defined by the target.
1586	QualType getUIntPtrType() const;
1587
1588	/// Return the unique type for "ptrdiff_t" (C99 7.17) defined in
1589	/// <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9).
1590	QualType getPointerDiffType() const;
1591
1592	/// Return the unique unsigned counterpart of "ptrdiff_t"
1593	/// integer type. The standard (C11 7.21.6.1p7) refers to this type
1594	/// in the definition of %tu format specifier.
1595	QualType getUnsignedPointerDiffType() const;
1596
1597	/// Return the unique type for "pid_t" defined in
1598	/// <sys/types.h>. We need this to compute the correct type for vfork().
1599	QualType getProcessIDType() const;
1600
1601	/// Return the C structure type used to represent constant CFStrings.
1602	QualType getCFConstantStringType() const;
1603
1604	/// Returns the C struct type for objc_super
1605	QualType getObjCSuperType() const;
1606	void setObjCSuperType(QualType ST) { ObjCSuperType = ST; }
1607
1608	/// Get the structure type used to representation CFStrings, or NULL
1609	/// if it hasn't yet been built.
1610	QualType getRawCFConstantStringType() const {
1611	if (CFConstantStringTypeDecl)
1612	return getTypedefType(CFConstantStringTypeDecl);
1613	return QualType();
1614	}
1615	void setCFConstantStringType(QualType T);
1616	TypedefDecl *getCFConstantStringDecl() const;
1617	RecordDecl *getCFConstantStringTagDecl() const;
1618
1619	// This setter/getter represents the ObjC type for an NSConstantString.
1620	void setObjCConstantStringInterface(ObjCInterfaceDecl *Decl);
1621	QualType getObjCConstantStringInterface() const {
1622	return ObjCConstantStringType;
1623	}
1624
1625	QualType getObjCNSStringType() const {
1626	return ObjCNSStringType;
1627	}
1628
1629	void setObjCNSStringType(QualType T) {
1630	ObjCNSStringType = T;
1631	}
1632
1633	/// Retrieve the type that \c id has been defined to, which may be
1634	/// different from the built-in \c id if \c id has been typedef'd.
1635	QualType getObjCIdRedefinitionType() const {
1636	if (ObjCIdRedefinitionType.isNull())
1637	return getObjCIdType();
1638	return ObjCIdRedefinitionType;
1639	}
1640
1641	/// Set the user-written type that redefines \c id.
1642	void setObjCIdRedefinitionType(QualType RedefType) {
1643	ObjCIdRedefinitionType = RedefType;
1644	}
1645
1646	/// Retrieve the type that \c Class has been defined to, which may be
1647	/// different from the built-in \c Class if \c Class has been typedef'd.
1648	QualType getObjCClassRedefinitionType() const {
1649	if (ObjCClassRedefinitionType.isNull())
1650	return getObjCClassType();
1651	return ObjCClassRedefinitionType;
1652	}
1653
1654	/// Set the user-written type that redefines 'SEL'.
1655	void setObjCClassRedefinitionType(QualType RedefType) {
1656	ObjCClassRedefinitionType = RedefType;
1657	}
1658
1659	/// Retrieve the type that 'SEL' has been defined to, which may be
1660	/// different from the built-in 'SEL' if 'SEL' has been typedef'd.
1661	QualType getObjCSelRedefinitionType() const {
1662	if (ObjCSelRedefinitionType.isNull())
1663	return getObjCSelType();
1664	return ObjCSelRedefinitionType;
1665	}
1666
1667	/// Set the user-written type that redefines 'SEL'.
1668	void setObjCSelRedefinitionType(QualType RedefType) {
1669	ObjCSelRedefinitionType = RedefType;
1670	}
1671
1672	/// Retrieve the identifier 'NSObject'.
1673	IdentifierInfo *getNSObjectName() const {
1674	if (!NSObjectName) {
1675	NSObjectName = &Idents.get("NSObject");
1676	}
1677
1678	return NSObjectName;
1679	}
1680
1681	/// Retrieve the identifier 'NSCopying'.
1682	IdentifierInfo *getNSCopyingName() {
1683	if (!NSCopyingName) {
1684	NSCopyingName = &Idents.get("NSCopying");
1685	}
1686
1687	return NSCopyingName;
1688	}
1689
1690	CanQualType getNSUIntegerType() const {
1691	(0) . __assert_fail ("Target && \"Expected target to be initialized\"", "/home/seafit/code_projects/clang_source/clang/include/clang/AST/ASTContext.h", 1691, __PRETTY_FUNCTION__))" file_link="../../../../include/assert.h.html#88" macro="true">assert(Target && "Expected target to be initialized");
1692	const llvm::Triple &T = Target->getTriple();
1693	// Windows is LLP64 rather than LP64
1694	if (T.isOSWindows() && T.isArch64Bit())
1695	return UnsignedLongLongTy;
1696	return UnsignedLongTy;
1697	}
1698
1699	CanQualType getNSIntegerType() const {
1700	(0) . __assert_fail ("Target && \"Expected target to be initialized\"", "/home/seafit/code_projects/clang_source/clang/include/clang/AST/ASTContext.h", 1700, __PRETTY_FUNCTION__))" file_link="../../../../include/assert.h.html#88" macro="true">assert(Target && "Expected target to be initialized");
1701	const llvm::Triple &T = Target->getTriple();
1702	// Windows is LLP64 rather than LP64
1703	if (T.isOSWindows() && T.isArch64Bit())
1704	return LongLongTy;
1705	return LongTy;
1706	}
1707
1708	/// Retrieve the identifier 'bool'.
1709	IdentifierInfo *getBoolName() const {
1710	if (!BoolName)
1711	BoolName = &Idents.get("bool");
1712	return BoolName;
1713	}
1714
1715	IdentifierInfo *getMakeIntegerSeqName() const {
1716	if (!MakeIntegerSeqName)
1717	MakeIntegerSeqName = &Idents.get("__make_integer_seq");
1718	return MakeIntegerSeqName;
1719	}
1720
1721	IdentifierInfo *getTypePackElementName() const {
1722	if (!TypePackElementName)
1723	TypePackElementName = &Idents.get("__type_pack_element");
1724	return TypePackElementName;
1725	}
1726
1727	/// Retrieve the Objective-C "instancetype" type, if already known;
1728	/// otherwise, returns a NULL type;
1729	QualType getObjCInstanceType() {
1730	return getTypeDeclType(getObjCInstanceTypeDecl());
1731	}
1732
1733	/// Retrieve the typedef declaration corresponding to the Objective-C
1734	/// "instancetype" type.
1735	TypedefDecl *getObjCInstanceTypeDecl();
1736
1737	/// Set the type for the C FILE type.
1738	void setFILEDecl(TypeDecl *FILEDecl) { this->FILEDecl = FILEDecl; }
1739
1740	/// Retrieve the C FILE type.
1741	QualType getFILEType() const {
1742	if (FILEDecl)
1743	return getTypeDeclType(FILEDecl);
1744	return QualType();
1745	}
1746
1747	/// Set the type for the C jmp_buf type.
1748	void setjmp_bufDecl(TypeDecl *jmp_bufDecl) {
1749	this->jmp_bufDecl = jmp_bufDecl;
1750	}
1751
1752	/// Retrieve the C jmp_buf type.
1753	QualType getjmp_bufType() const {
1754	if (jmp_bufDecl)
1755	return getTypeDeclType(jmp_bufDecl);
1756	return QualType();
1757	}
1758
1759	/// Set the type for the C sigjmp_buf type.
1760	void setsigjmp_bufDecl(TypeDecl *sigjmp_bufDecl) {
1761	this->sigjmp_bufDecl = sigjmp_bufDecl;
1762	}
1763
1764	/// Retrieve the C sigjmp_buf type.
1765	QualType getsigjmp_bufType() const {
1766	if (sigjmp_bufDecl)
1767	return getTypeDeclType(sigjmp_bufDecl);
1768	return QualType();
1769	}
1770
1771	/// Set the type for the C ucontext_t type.
1772	void setucontext_tDecl(TypeDecl *ucontext_tDecl) {
1773	this->ucontext_tDecl = ucontext_tDecl;
1774	}
1775
1776	/// Retrieve the C ucontext_t type.
1777	QualType getucontext_tType() const {
1778	if (ucontext_tDecl)
1779	return getTypeDeclType(ucontext_tDecl);
1780	return QualType();
1781	}
1782
1783	/// The result type of logical operations, '<', '>', '!=', etc.
1784	QualType getLogicalOperationType() const {
1785	return getLangOpts().CPlusPlus ? BoolTy : IntTy;
1786	}
1787
1788	/// Emit the Objective-CC type encoding for the given type \p T into
1789	/// \p S.
1790	///
1791	/// If \p Field is specified then record field names are also encoded.
1792	void getObjCEncodingForType(QualType T, std::string &S,
1793	const FieldDecl *Field=nullptr,
1794	QualType *NotEncodedT=nullptr) const;
1795
1796	/// Emit the Objective-C property type encoding for the given
1797	/// type \p T into \p S.
1798	void getObjCEncodingForPropertyType(QualType T, std::string &S) const;
1799
1800	void getLegacyIntegralTypeEncoding(QualType &t) const;
1801
1802	/// Put the string version of the type qualifiers \p QT into \p S.
1803	void getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT,
1804	std::string &S) const;
1805
1806	/// Emit the encoded type for the function \p Decl into \p S.
1807	///
1808	/// This is in the same format as Objective-C method encodings.
1809	///
1810	/// \returns true if an error occurred (e.g., because one of the parameter
1811	/// types is incomplete), false otherwise.
1812	std::string getObjCEncodingForFunctionDecl(const FunctionDecl *Decl) const;
1813
1814	/// Emit the encoded type for the method declaration \p Decl into
1815	/// \p S.
1816	std::string getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl,
1817	bool Extended = false) const;
1818
1819	/// Return the encoded type for this block declaration.
1820	std::string getObjCEncodingForBlock(const BlockExpr *blockExpr) const;
1821
1822	/// getObjCEncodingForPropertyDecl - Return the encoded type for
1823	/// this method declaration. If non-NULL, Container must be either
1824	/// an ObjCCategoryImplDecl or ObjCImplementationDecl; it should
1825	/// only be NULL when getting encodings for protocol properties.
1826	std::string getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD,
1827	const Decl *Container) const;
1828
1829	bool ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto,
1830	ObjCProtocolDecl *rProto) const;
1831
1832	ObjCPropertyImplDecl *getObjCPropertyImplDeclForPropertyDecl(
1833	const ObjCPropertyDecl *PD,
1834	const Decl *Container) const;
1835
1836	/// Return the size of type \p T for Objective-C encoding purpose,
1837	/// in characters.
1838	CharUnits getObjCEncodingTypeSize(QualType T) const;
1839
1840	/// Retrieve the typedef corresponding to the predefined \c id type
1841	/// in Objective-C.
1842	TypedefDecl *getObjCIdDecl() const;
1843
1844	/// Represents the Objective-CC \c id type.
1845	///
1846	/// This is set up lazily, by Sema. \c id is always a (typedef for a)
1847	/// pointer type, a pointer to a struct.
1848	QualType getObjCIdType() const {
1849	return getTypeDeclType(getObjCIdDecl());
1850	}
1851
1852	/// Retrieve the typedef corresponding to the predefined 'SEL' type
1853	/// in Objective-C.
1854	TypedefDecl *getObjCSelDecl() const;
1855
1856	/// Retrieve the type that corresponds to the predefined Objective-C
1857	/// 'SEL' type.
1858	QualType getObjCSelType() const {
1859	return getTypeDeclType(getObjCSelDecl());
1860	}
1861
1862	/// Retrieve the typedef declaration corresponding to the predefined
1863	/// Objective-C 'Class' type.
1864	TypedefDecl *getObjCClassDecl() const;
1865
1866	/// Represents the Objective-C \c Class type.
1867	///
1868	/// This is set up lazily, by Sema. \c Class is always a (typedef for a)
1869	/// pointer type, a pointer to a struct.
1870	QualType getObjCClassType() const {
1871	return getTypeDeclType(getObjCClassDecl());
1872	}
1873
1874	/// Retrieve the Objective-C class declaration corresponding to
1875	/// the predefined \c Protocol class.
1876	ObjCInterfaceDecl *getObjCProtocolDecl() const;
1877
1878	/// Retrieve declaration of 'BOOL' typedef
1879	TypedefDecl *getBOOLDecl() const {
1880	return BOOLDecl;
1881	}
1882
1883	/// Save declaration of 'BOOL' typedef
1884	void setBOOLDecl(TypedefDecl *TD) {
1885	BOOLDecl = TD;
1886	}
1887
1888	/// type of 'BOOL' type.
1889	QualType getBOOLType() const {
1890	return getTypeDeclType(getBOOLDecl());
1891	}
1892
1893	/// Retrieve the type of the Objective-C \c Protocol class.
1894	QualType getObjCProtoType() const {
1895	return getObjCInterfaceType(getObjCProtocolDecl());
1896	}
1897
1898	/// Retrieve the C type declaration corresponding to the predefined
1899	/// \c __builtin_va_list type.
1900	TypedefDecl *getBuiltinVaListDecl() const;
1901
1902	/// Retrieve the type of the \c __builtin_va_list type.
1903	QualType getBuiltinVaListType() const {
1904	return getTypeDeclType(getBuiltinVaListDecl());
1905	}
1906
1907	/// Retrieve the C type declaration corresponding to the predefined
1908	/// \c __va_list_tag type used to help define the \c __builtin_va_list type
1909	/// for some targets.
1910	Decl *getVaListTagDecl() const;
1911
1912	/// Retrieve the C type declaration corresponding to the predefined
1913	/// \c __builtin_ms_va_list type.
1914	TypedefDecl *getBuiltinMSVaListDecl() const;
1915
1916	/// Retrieve the type of the \c __builtin_ms_va_list type.
1917	QualType getBuiltinMSVaListType() const {
1918	return getTypeDeclType(getBuiltinMSVaListDecl());
1919	}
1920
1921	/// Return whether a declaration to a builtin is allowed to be
1922	/// overloaded/redeclared.
1923	bool canBuiltinBeRedeclared(const FunctionDecl *) const;
1924
1925	/// Return a type with additional \c const, \c volatile, or
1926	/// \c restrict qualifiers.
1927	QualType getCVRQualifiedType(QualType T, unsigned CVR) const {
1928	return getQualifiedType(T, Qualifiers::fromCVRMask(CVR));
1929	}
1930
1931	/// Un-split a SplitQualType.
1932	QualType getQualifiedType(SplitQualType split) const {
1933	return getQualifiedType(split.Ty, split.Quals);
1934	}
1935
1936	/// Return a type with additional qualifiers.
1937	QualType getQualifiedType(QualType T, Qualifiers Qs) const {
1938	if (!Qs.hasNonFastQualifiers())
1939	return T.withFastQualifiers(Qs.getFastQualifiers());
1940	QualifierCollector Qc(Qs);
1941	const Type *Ptr = Qc.strip(T);
1942	return getExtQualType(Ptr, Qc);
1943	}
1944
1945	/// Return a type with additional qualifiers.
1946	QualType getQualifiedType(const Type *T, Qualifiers Qs) const {
1947	if (!Qs.hasNonFastQualifiers())
1948	return QualType(T, Qs.getFastQualifiers());
1949	return getExtQualType(T, Qs);
1950	}
1951
1952	/// Return a type with the given lifetime qualifier.
1953	///
1954	/// \pre Neither type.ObjCLifetime() nor \p lifetime may be \c OCL_None.
1955	QualType getLifetimeQualifiedType(QualType type,
1956	Qualifiers::ObjCLifetime lifetime) {
1957	assert(type.getObjCLifetime() == Qualifiers::OCL_None);
1958	assert(lifetime != Qualifiers::OCL_None);
1959
1960	Qualifiers qs;
1961	qs.addObjCLifetime(lifetime);
1962	return getQualifiedType(type, qs);
1963	}
1964
1965	/// getUnqualifiedObjCPointerType - Returns version of
1966	/// Objective-C pointer type with lifetime qualifier removed.
1967	QualType getUnqualifiedObjCPointerType(QualType type) const {
1968	if (!type.getTypePtr()->isObjCObjectPointerType() \|\|
1969	!type.getQualifiers().hasObjCLifetime())
1970	return type;
1971	Qualifiers Qs = type.getQualifiers();
1972	Qs.removeObjCLifetime();
1973	return getQualifiedType(type.getUnqualifiedType(), Qs);
1974	}
1975
1976	unsigned char getFixedPointScale(QualType Ty) const;
1977	unsigned char getFixedPointIBits(QualType Ty) const;
1978	FixedPointSemantics getFixedPointSemantics(QualType Ty) const;
1979	APFixedPoint getFixedPointMax(QualType Ty) const;
1980	APFixedPoint getFixedPointMin(QualType Ty) const;
1981
1982	DeclarationNameInfo getNameForTemplate(TemplateName Name,
1983	SourceLocation NameLoc) const;
1984
1985	TemplateName getOverloadedTemplateName(UnresolvedSetIterator Begin,
1986	UnresolvedSetIterator End) const;
1987
1988	TemplateName getQualifiedTemplateName(NestedNameSpecifier *NNS,
1989	bool TemplateKeyword,
1990	TemplateDecl *Template) const;
1991
1992	TemplateName getDependentTemplateName(NestedNameSpecifier *NNS,
1993	const IdentifierInfo *Name) const;
1994	TemplateName getDependentTemplateName(NestedNameSpecifier *NNS,
1995	OverloadedOperatorKind Operator) const;
1996	TemplateName getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param,
1997	TemplateName replacement) const;
1998	TemplateName getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param,
1999	const TemplateArgument &ArgPack) const;
2000
2001	enum GetBuiltinTypeError {
2002	/// No error
2003	GE_None,
2004
2005	/// Missing a type
2006	GE_Missing_type,
2007
2008	/// Missing a type from <stdio.h>
2009	GE_Missing_stdio,
2010
2011	/// Missing a type from <setjmp.h>
2012	GE_Missing_setjmp,
2013
2014	/// Missing a type from <ucontext.h>
2015	GE_Missing_ucontext
2016	};
2017
2018	/// Return the type for the specified builtin.
2019	///
2020	/// If \p IntegerConstantArgs is non-null, it is filled in with a bitmask of
2021	/// arguments to the builtin that are required to be integer constant
2022	/// expressions.
2023	QualType GetBuiltinType(unsigned ID, GetBuiltinTypeError &Error,
2024	unsigned *IntegerConstantArgs = nullptr) const;
2025
2026	/// Types and expressions required to build C++2a three-way comparisons
2027	/// using operator<=>, including the values return by builtin <=> operators.
2028	ComparisonCategories CompCategories;
2029
2030	private:
2031	CanQualType getFromTargetType(unsigned Type) const;
2032	TypeInfo getTypeInfoImpl(const Type *T) const;
2033
2034	//===--------------------------------------------------------------------===//
2035	// Type Predicates.
2036	//===--------------------------------------------------------------------===//
2037
2038	public:
2039	/// Return one of the GCNone, Weak or Strong Objective-C garbage
2040	/// collection attributes.
2041	Qualifiers::GC getObjCGCAttrKind(QualType Ty) const;
2042
2043	/// Return true if the given vector types are of the same unqualified
2044	/// type or if they are equivalent to the same GCC vector type.
2045	///
2046	/// \note This ignores whether they are target-specific (AltiVec or Neon)
2047	/// types.
2048	bool areCompatibleVectorTypes(QualType FirstVec, QualType SecondVec);
2049
2050	/// Return true if this is an \c NSObject object with its \c NSObject
2051	/// attribute set.
2052	static bool isObjCNSObjectType(QualType Ty) {
2053	return Ty->isObjCNSObjectType();
2054	}
2055
2056	//===--------------------------------------------------------------------===//
2057	// Type Sizing and Analysis
2058	//===--------------------------------------------------------------------===//
2059
2060	/// Return the APFloat 'semantics' for the specified scalar floating
2061	/// point type.
2062	const llvm::fltSemantics &getFloatTypeSemantics(QualType T) const;
2063
2064	/// Get the size and alignment of the specified complete type in bits.
2065	TypeInfo getTypeInfo(const Type *T) const;
2066	TypeInfo getTypeInfo(QualType T) const { return getTypeInfo(T.getTypePtr()); }
2067
2068	/// Get default simd alignment of the specified complete type in bits.
2069	unsigned getOpenMPDefaultSimdAlign(QualType T) const;
2070
2071	/// Return the size of the specified (complete) type \p T, in bits.
2072	uint64_t getTypeSize(QualType T) const { return getTypeInfo(T).Width; }
2073	uint64_t getTypeSize(const Type *T) const { return getTypeInfo(T).Width; }
2074
2075	/// Return the size of the character type, in bits.
2076	uint64_t getCharWidth() const {
2077	return getTypeSize(CharTy);
2078	}
2079
2080	/// Convert a size in bits to a size in characters.
2081	CharUnits toCharUnitsFromBits(int64_t BitSize) const;
2082
2083	/// Convert a size in characters to a size in bits.
2084	int64_t toBits(CharUnits CharSize) const;
2085
2086	/// Return the size of the specified (complete) type \p T, in
2087	/// characters.
2088	CharUnits getTypeSizeInChars(QualType T) const;
2089	CharUnits getTypeSizeInChars(const Type *T) const;
2090
2091	Optional<CharUnits> getTypeSizeInCharsIfKnown(QualType Ty) const {
2092	if (Ty->isIncompleteType() \|\| Ty->isDependentType())
2093	return None;
2094	return getTypeSizeInChars(Ty);
2095	}
2096
2097	Optional<CharUnits> getTypeSizeInCharsIfKnown(const Type *Ty) const {
2098	return getTypeSizeInCharsIfKnown(QualType(Ty, 0));
2099	}
2100
2101	/// Return the ABI-specified alignment of a (complete) type \p T, in
2102	/// bits.
2103	unsigned getTypeAlign(QualType T) const { return getTypeInfo(T).Align; }
2104	unsigned getTypeAlign(const Type *T) const { return getTypeInfo(T).Align; }
2105
2106	/// Return the ABI-specified natural alignment of a (complete) type \p T,
2107	/// before alignment adjustments, in bits.
2108	///
2109	/// This alignment is curently used only by ARM and AArch64 when passing
2110	/// arguments of a composite type.
2111	unsigned getTypeUnadjustedAlign(QualType T) const {
2112	return getTypeUnadjustedAlign(T.getTypePtr());
2113	}
2114	unsigned getTypeUnadjustedAlign(const Type *T) const;
2115
2116	/// Return the ABI-specified alignment of a type, in bits, or 0 if
2117	/// the type is incomplete and we cannot determine the alignment (for
2118	/// example, from alignment attributes).
2119	unsigned getTypeAlignIfKnown(QualType T) const;
2120
2121	/// Return the ABI-specified alignment of a (complete) type \p T, in
2122	/// characters.
2123	CharUnits getTypeAlignInChars(QualType T) const;
2124	CharUnits getTypeAlignInChars(const Type *T) const;
2125
2126	/// getTypeUnadjustedAlignInChars - Return the ABI-specified alignment of a type,
2127	/// in characters, before alignment adjustments. This method does not work on
2128	/// incomplete types.
2129	CharUnits getTypeUnadjustedAlignInChars(QualType T) const;
2130	CharUnits getTypeUnadjustedAlignInChars(const Type *T) const;
2131
2132	// getTypeInfoDataSizeInChars - Return the size of a type, in chars. If the
2133	// type is a record, its data size is returned.
2134	std::pair<CharUnits, CharUnits> getTypeInfoDataSizeInChars(QualType T) const;
2135
2136	std::pair<CharUnits, CharUnits> getTypeInfoInChars(const Type *T) const;
2137	std::pair<CharUnits, CharUnits> getTypeInfoInChars(QualType T) const;
2138
2139	/// Determine if the alignment the type has was required using an
2140	/// alignment attribute.
2141	bool isAlignmentRequired(const Type *T) const;
2142	bool isAlignmentRequired(QualType T) const;
2143
2144	/// Return the "preferred" alignment of the specified type \p T for
2145	/// the current target, in bits.
2146	///
2147	/// This can be different than the ABI alignment in cases where it is
2148	/// beneficial for performance to overalign a data type.
2149	unsigned getPreferredTypeAlign(const Type *T) const;
2150
2151	/// Return the default alignment for __attribute__((aligned)) on
2152	/// this target, to be used if no alignment value is specified.
2153	unsigned getTargetDefaultAlignForAttributeAligned() const;
2154
2155	/// Return the alignment in bits that should be given to a
2156	/// global variable with type \p T.
2157	unsigned getAlignOfGlobalVar(QualType T) const;
2158
2159	/// Return the alignment in characters that should be given to a
2160	/// global variable with type \p T.
2161	CharUnits getAlignOfGlobalVarInChars(QualType T) const;
2162
2163	/// Return a conservative estimate of the alignment of the specified
2164	/// decl \p D.
2165	///
2166	/// \pre \p D must not be a bitfield type, as bitfields do not have a valid
2167	/// alignment.
2168	///
2169	/// If \p ForAlignof, references are treated like their underlying type
2170	/// and large arrays don't get any special treatment. If not \p ForAlignof
2171	/// it computes the value expected by CodeGen: references are treated like
2172	/// pointers and large arrays get extra alignment.
2173	CharUnits getDeclAlign(const Decl *D, bool ForAlignof = false) const;
2174
2175	/// Get or compute information about the layout of the specified
2176	/// record (struct/union/class) \p D, which indicates its size and field
2177	/// position information.
2178	const ASTRecordLayout &getASTRecordLayout(const RecordDecl *D) const;
2179
2180	/// Get or compute information about the layout of the specified
2181	/// Objective-C interface.
2182	const ASTRecordLayout &getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D)
2183	const;
2184
2185	void DumpRecordLayout(const RecordDecl *RD, raw_ostream &OS,
2186	bool Simple = false) const;
2187
2188	/// Get or compute information about the layout of the specified
2189	/// Objective-C implementation.
2190	///
2191	/// This may differ from the interface if synthesized ivars are present.
2192	const ASTRecordLayout &
2193	getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const;
2194
2195	/// Get our current best idea for the key function of the
2196	/// given record decl, or nullptr if there isn't one.
2197	///
2198	/// The key function is, according to the Itanium C++ ABI section 5.2.3:
2199	/// ...the first non-pure virtual function that is not inline at the
2200	/// point of class definition.
2201	///
2202	/// Other ABIs use the same idea. However, the ARM C++ ABI ignores
2203	/// virtual functions that are defined 'inline', which means that
2204	/// the result of this computation can change.
2205	const CXXMethodDecl getCurrentKeyFunction(const CXXRecordDecl RD);
2206
2207	/// Observe that the given method cannot be a key function.
2208	/// Checks the key-function cache for the method's class and clears it
2209	/// if matches the given declaration.
2210	///
2211	/// This is used in ABIs where out-of-line definitions marked
2212	/// inline are not considered to be key functions.
2213	///
2214	/// \param method should be the declaration from the class definition
2215	void setNonKeyFunction(const CXXMethodDecl *method);
2216
2217	/// Loading virtual member pointers using the virtual inheritance model
2218	/// always results in an adjustment using the vbtable even if the index is
2219	/// zero.
2220	///
2221	/// This is usually OK because the first slot in the vbtable points
2222	/// backwards to the top of the MDC. However, the MDC might be reusing a
2223	/// vbptr from an nv-base. In this case, the first slot in the vbtable
2224	/// points to the start of the nv-base which introduced the vbptr and not
2225	/// the MDC. Modify the NonVirtualBaseAdjustment to account for this.
2226	CharUnits getOffsetOfBaseWithVBPtr(const CXXRecordDecl *RD) const;
2227
2228	/// Get the offset of a FieldDecl or IndirectFieldDecl, in bits.
2229	uint64_t getFieldOffset(const ValueDecl *FD) const;
2230
2231	/// Get the offset of an ObjCIvarDecl in bits.
2232	uint64_t lookupFieldBitOffset(const ObjCInterfaceDecl *OID,
2233	const ObjCImplementationDecl *ID,
2234	const ObjCIvarDecl *Ivar) const;
2235
2236	bool isNearlyEmpty(const CXXRecordDecl *RD) const;
2237
2238	VTableContextBase *getVTableContext();
2239
2240	/// If \p T is null pointer, assume the target in ASTContext.
2241	MangleContext createMangleContext(const TargetInfo T = nullptr);
2242
2243	void DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, bool leafClass,
2244	SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const;
2245
2246	unsigned CountNonClassIvars(const ObjCInterfaceDecl *OI) const;
2247	void CollectInheritedProtocols(const Decl *CDecl,
2248	llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols);
2249
2250	/// Return true if the specified type has unique object representations
2251	/// according to (C++17 [meta.unary.prop]p9)
2252	bool hasUniqueObjectRepresentations(QualType Ty) const;
2253
2254	//===--------------------------------------------------------------------===//
2255	// Type Operators
2256	//===--------------------------------------------------------------------===//
2257
2258	/// Return the canonical (structural) type corresponding to the
2259	/// specified potentially non-canonical type \p T.
2260	///
2261	/// The non-canonical version of a type may have many "decorated" versions of
2262	/// types. Decorators can include typedefs, 'typeof' operators, etc. The
2263	/// returned type is guaranteed to be free of any of these, allowing two
2264	/// canonical types to be compared for exact equality with a simple pointer
2265	/// comparison.
2266	CanQualType getCanonicalType(QualType T) const {
2267	return CanQualType::CreateUnsafe(T.getCanonicalType());
2268	}
2269
2270	const Type getCanonicalType(const Type T) const {
2271	return T->getCanonicalTypeInternal().getTypePtr();
2272	}
2273
2274	/// Return the canonical parameter type corresponding to the specific
2275	/// potentially non-canonical one.
2276	///
2277	/// Qualifiers are stripped off, functions are turned into function
2278	/// pointers, and arrays decay one level into pointers.
2279	CanQualType getCanonicalParamType(QualType T) const;
2280
2281	/// Determine whether the given types \p T1 and \p T2 are equivalent.
2282	bool hasSameType(QualType T1, QualType T2) const {
2283	return getCanonicalType(T1) == getCanonicalType(T2);
2284	}
2285	bool hasSameType(const Type T1, const Type T2) const {
2286	return getCanonicalType(T1) == getCanonicalType(T2);
2287	}
2288
2289	/// Return this type as a completely-unqualified array type,
2290	/// capturing the qualifiers in \p Quals.
2291	///
2292	/// This will remove the minimal amount of sugaring from the types, similar
2293	/// to the behavior of QualType::getUnqualifiedType().
2294	///
2295	/// \param T is the qualified type, which may be an ArrayType
2296	///
2297	/// \param Quals will receive the full set of qualifiers that were
2298	/// applied to the array.
2299	///
2300	/// \returns if this is an array type, the completely unqualified array type
2301	/// that corresponds to it. Otherwise, returns T.getUnqualifiedType().
2302	QualType getUnqualifiedArrayType(QualType T, Qualifiers &Quals);
2303
2304	/// Determine whether the given types are equivalent after
2305	/// cvr-qualifiers have been removed.
2306	bool hasSameUnqualifiedType(QualType T1, QualType T2) const {
2307	return getCanonicalType(T1).getTypePtr() ==
2308	getCanonicalType(T2).getTypePtr();
2309	}
2310
2311	bool hasSameNullabilityTypeQualifier(QualType SubT, QualType SuperT,
2312	bool IsParam) const {
2313	auto SubTnullability = SubT->getNullability(*this);
2314	auto SuperTnullability = SuperT->getNullability(*this);
2315	if (SubTnullability.hasValue() == SuperTnullability.hasValue()) {
2316	// Neither has nullability; return true
2317	if (!SubTnullability)
2318	return true;
2319	// Both have nullability qualifier.
2320	if (SubTnullability == SuperTnullability \|\|
2321	*SubTnullability == NullabilityKind::Unspecified \|\|
2322	*SuperTnullability == NullabilityKind::Unspecified)
2323	return true;
2324
2325	if (IsParam) {
2326	// Ok for the superclass method parameter to be "nonnull" and the subclass
2327	// method parameter to be "nullable"
2328	return (*SuperTnullability == NullabilityKind::NonNull &&
2329	*SubTnullability == NullabilityKind::Nullable);
2330	}
2331	else {
2332	// For the return type, it's okay for the superclass method to specify
2333	// "nullable" and the subclass method specify "nonnull"
2334	return (*SuperTnullability == NullabilityKind::Nullable &&
2335	*SubTnullability == NullabilityKind::NonNull);
2336	}
2337	}
2338	return true;
2339	}
2340
2341	bool ObjCMethodsAreEqual(const ObjCMethodDecl *MethodDecl,
2342	const ObjCMethodDecl *MethodImp);
2343
2344	bool UnwrapSimilarTypes(QualType &T1, QualType &T2);
2345	bool UnwrapSimilarArrayTypes(QualType &T1, QualType &T2);
2346
2347	/// Determine if two types are similar, according to the C++ rules. That is,
2348	/// determine if they are the same other than qualifiers on the initial
2349	/// sequence of pointer / pointer-to-member / array (and in Clang, object
2350	/// pointer) types and their element types.
2351	///
2352	/// Clang offers a number of qualifiers in addition to the C++ qualifiers;
2353	/// those qualifiers are also ignored in the 'similarity' check.
2354	bool hasSimilarType(QualType T1, QualType T2);
2355
2356	/// Determine if two types are similar, ignoring only CVR qualifiers.
2357	bool hasCvrSimilarType(QualType T1, QualType T2);
2358
2359	/// Retrieves the "canonical" nested name specifier for a
2360	/// given nested name specifier.
2361	///
2362	/// The canonical nested name specifier is a nested name specifier
2363	/// that uniquely identifies a type or namespace within the type
2364	/// system. For example, given:
2365	///
2366	/// \code
2367	/// namespace N {
2368	/// struct S {
2369	/// template<typename T> struct X { typename T* type; };
2370	/// };
2371	/// }
2372	///
2373	/// template<typename T> struct Y {
2374	/// typename N::S::X<T>::type member;
2375	/// };
2376	/// \endcode
2377	///
2378	/// Here, the nested-name-specifier for N::S::X<T>:: will be
2379	/// S::X<template-param-0-0>, since 'S' and 'X' are uniquely defined
2380	/// by declarations in the type system and the canonical type for
2381	/// the template type parameter 'T' is template-param-0-0.
2382	NestedNameSpecifier *
2383	getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const;
2384
2385	/// Retrieves the default calling convention for the current target.
2386	CallingConv getDefaultCallingConvention(bool IsVariadic,
2387	bool IsCXXMethod) const;
2388
2389	/// Retrieves the "canonical" template name that refers to a
2390	/// given template.
2391	///
2392	/// The canonical template name is the simplest expression that can
2393	/// be used to refer to a given template. For most templates, this
2394	/// expression is just the template declaration itself. For example,
2395	/// the template std::vector can be referred to via a variety of
2396	/// names---std::vector, \::std::vector, vector (if vector is in
2397	/// scope), etc.---but all of these names map down to the same
2398	/// TemplateDecl, which is used to form the canonical template name.
2399	///
2400	/// Dependent template names are more interesting. Here, the
2401	/// template name could be something like T::template apply or
2402	/// std::allocator<T>::template rebind, where the nested name
2403	/// specifier itself is dependent. In this case, the canonical
2404	/// template name uses the shortest form of the dependent
2405	/// nested-name-specifier, which itself contains all canonical
2406	/// types, values, and templates.
2407	TemplateName getCanonicalTemplateName(TemplateName Name) const;
2408
2409	/// Determine whether the given template names refer to the same
2410	/// template.
2411	bool hasSameTemplateName(TemplateName X, TemplateName Y);
2412
2413	/// Retrieve the "canonical" template argument.
2414	///
2415	/// The canonical template argument is the simplest template argument
2416	/// (which may be a type, value, expression, or declaration) that
2417	/// expresses the value of the argument.
2418	TemplateArgument getCanonicalTemplateArgument(const TemplateArgument &Arg)
2419	const;
2420
2421	/// Type Query functions. If the type is an instance of the specified class,
2422	/// return the Type pointer for the underlying maximally pretty type. This
2423	/// is a member of ASTContext because this may need to do some amount of
2424	/// canonicalization, e.g. to move type qualifiers into the element type.
2425	const ArrayType *getAsArrayType(QualType T) const;
2426	const ConstantArrayType *getAsConstantArrayType(QualType T) const {
2427	return dyn_cast_or_null<ConstantArrayType>(getAsArrayType(T));
2428	}
2429	const VariableArrayType *getAsVariableArrayType(QualType T) const {
2430	return dyn_cast_or_null<VariableArrayType>(getAsArrayType(T));
2431	}
2432	const IncompleteArrayType *getAsIncompleteArrayType(QualType T) const {
2433	return dyn_cast_or_null<IncompleteArrayType>(getAsArrayType(T));
2434	}
2435	const DependentSizedArrayType *getAsDependentSizedArrayType(QualType T)
2436	const {
2437	return dyn_cast_or_null<DependentSizedArrayType>(getAsArrayType(T));
2438	}
2439
2440	/// Return the innermost element type of an array type.
2441	///
2442	/// For example, will return "int" for int[m][n]
2443	QualType getBaseElementType(const ArrayType *VAT) const;
2444
2445	/// Return the innermost element type of a type (which needn't
2446	/// actually be an array type).
2447	QualType getBaseElementType(QualType QT) const;
2448
2449	/// Return number of constant array elements.
2450	uint64_t getConstantArrayElementCount(const ConstantArrayType *CA) const;
2451
2452	/// Perform adjustment on the parameter type of a function.
2453	///
2454	/// This routine adjusts the given parameter type @p T to the actual
2455	/// parameter type used by semantic analysis (C99 6.7.5.3p[7,8],
2456	/// C++ [dcl.fct]p3). The adjusted parameter type is returned.
2457	QualType getAdjustedParameterType(QualType T) const;
2458
2459	/// Retrieve the parameter type as adjusted for use in the signature
2460	/// of a function, decaying array and function types and removing top-level
2461	/// cv-qualifiers.
2462	QualType getSignatureParameterType(QualType T) const;
2463
2464	QualType getExceptionObjectType(QualType T) const;
2465
2466	/// Return the properly qualified result of decaying the specified
2467	/// array type to a pointer.
2468	///
2469	/// This operation is non-trivial when handling typedefs etc. The canonical
2470	/// type of \p T must be an array type, this returns a pointer to a properly
2471	/// qualified element of the array.
2472	///
2473	/// See C99 6.7.5.3p7 and C99 6.3.2.1p3.
2474	QualType getArrayDecayedType(QualType T) const;
2475
2476	/// Return the type that \p PromotableType will promote to: C99
2477	/// 6.3.1.1p2, assuming that \p PromotableType is a promotable integer type.
2478	QualType getPromotedIntegerType(QualType PromotableType) const;
2479
2480	/// Recurses in pointer/array types until it finds an Objective-C
2481	/// retainable type and returns its ownership.
2482	Qualifiers::ObjCLifetime getInnerObjCOwnership(QualType T) const;
2483
2484	/// Whether this is a promotable bitfield reference according
2485	/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions).
2486	///
2487	/// \returns the type this bit-field will promote to, or NULL if no
2488	/// promotion occurs.
2489	QualType isPromotableBitField(Expr *E) const;
2490
2491	/// Return the highest ranked integer type, see C99 6.3.1.8p1.
2492	///
2493	/// If \p LHS > \p RHS, returns 1. If \p LHS == \p RHS, returns 0. If
2494	/// \p LHS < \p RHS, return -1.
2495	int getIntegerTypeOrder(QualType LHS, QualType RHS) const;
2496
2497	/// Compare the rank of the two specified floating point types,
2498	/// ignoring the domain of the type (i.e. 'double' == '_Complex double').
2499	///
2500	/// If \p LHS > \p RHS, returns 1. If \p LHS == \p RHS, returns 0. If
2501	/// \p LHS < \p RHS, return -1.
2502	int getFloatingTypeOrder(QualType LHS, QualType RHS) const;
2503
2504	/// Compare the rank of two floating point types as above, but compare equal
2505	/// if both types have the same floating-point semantics on the target (i.e.
2506	/// long double and double on AArch64 will return 0).
2507	int getFloatingTypeSemanticOrder(QualType LHS, QualType RHS) const;
2508
2509	/// Return a real floating point or a complex type (based on
2510	/// \p typeDomain/\p typeSize).
2511	///
2512	/// \param typeDomain a real floating point or complex type.
2513	/// \param typeSize a real floating point or complex type.
2514	QualType getFloatingTypeOfSizeWithinDomain(QualType typeSize,
2515	QualType typeDomain) const;
2516
2517	unsigned getTargetAddressSpace(QualType T) const {
2518	return getTargetAddressSpace(T.getQualifiers());
2519	}
2520
2521	unsigned getTargetAddressSpace(Qualifiers Q) const {
2522	return getTargetAddressSpace(Q.getAddressSpace());
2523	}
2524
2525	unsigned getTargetAddressSpace(LangAS AS) const;
2526
2527	LangAS getLangASForBuiltinAddressSpace(unsigned AS) const;
2528
2529	/// Get target-dependent integer value for null pointer which is used for
2530	/// constant folding.
2531	uint64_t getTargetNullPointerValue(QualType QT) const;
2532
2533	bool addressSpaceMapManglingFor(LangAS AS) const {
2534	return AddrSpaceMapMangling \|\| isTargetAddressSpace(AS);
2535	}
2536
2537	private:
2538	// Helper for integer ordering
2539	unsigned getIntegerRank(const Type *T) const;
2540
2541	public:
2542	//===--------------------------------------------------------------------===//
2543	// Type Compatibility Predicates
2544	//===--------------------------------------------------------------------===//
2545
2546	/// Compatibility predicates used to check assignment expressions.
2547	bool typesAreCompatible(QualType T1, QualType T2,
2548	bool CompareUnqualified = false); // C99 6.2.7p1
2549
2550	bool propertyTypesAreCompatible(QualType, QualType);
2551	bool typesAreBlockPointerCompatible(QualType, QualType);
2552
2553	bool isObjCIdType(QualType T) const {
2554	return T == getObjCIdType();
2555	}
2556
2557	bool isObjCClassType(QualType T) const {
2558	return T == getObjCClassType();
2559	}
2560
2561	bool isObjCSelType(QualType T) const {
2562	return T == getObjCSelType();
2563	}
2564
2565	bool ObjCQualifiedIdTypesAreCompatible(QualType LHS, QualType RHS,
2566	bool ForCompare);
2567
2568	bool ObjCQualifiedClassTypesAreCompatible(QualType LHS, QualType RHS);
2569
2570	// Check the safety of assignment from LHS to RHS
2571	bool canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT,
2572	const ObjCObjectPointerType *RHSOPT);
2573	bool canAssignObjCInterfaces(const ObjCObjectType *LHS,
2574	const ObjCObjectType *RHS);
2575	bool canAssignObjCInterfacesInBlockPointer(
2576	const ObjCObjectPointerType *LHSOPT,
2577	const ObjCObjectPointerType *RHSOPT,
2578	bool BlockReturnType);
2579	bool areComparableObjCPointerTypes(QualType LHS, QualType RHS);
2580	QualType areCommonBaseCompatible(const ObjCObjectPointerType *LHSOPT,
2581	const ObjCObjectPointerType *RHSOPT);
2582	bool canBindObjCObjectType(QualType To, QualType From);
2583
2584	// Functions for calculating composite types
2585	QualType mergeTypes(QualType, QualType, bool OfBlockPointer=false,
2586	bool Unqualified = false, bool BlockReturnType = false);
2587	QualType mergeFunctionTypes(QualType, QualType, bool OfBlockPointer=false,
2588	bool Unqualified = false);
2589	QualType mergeFunctionParameterTypes(QualType, QualType,
2590	bool OfBlockPointer = false,
2591	bool Unqualified = false);
2592	QualType mergeTransparentUnionType(QualType, QualType,
2593	bool OfBlockPointer=false,
2594	bool Unqualified = false);
2595
2596	QualType mergeObjCGCQualifiers(QualType, QualType);
2597
2598	/// This function merges the ExtParameterInfo lists of two functions. It
2599	/// returns true if the lists are compatible. The merged list is returned in
2600	/// NewParamInfos.
2601	///
2602	/// \param FirstFnType The type of the first function.
2603	///
2604	/// \param SecondFnType The type of the second function.
2605	///
2606	/// \param CanUseFirst This flag is set to true if the first function's
2607	/// ExtParameterInfo list can be used as the composite list of
2608	/// ExtParameterInfo.
2609	///
2610	/// \param CanUseSecond This flag is set to true if the second function's
2611	/// ExtParameterInfo list can be used as the composite list of
2612	/// ExtParameterInfo.
2613	///
2614	/// \param NewParamInfos The composite list of ExtParameterInfo. The list is
2615	/// empty if none of the flags are set.
2616	///
2617	bool mergeExtParameterInfo(
2618	const FunctionProtoType *FirstFnType,
2619	const FunctionProtoType *SecondFnType,
2620	bool &CanUseFirst, bool &CanUseSecond,
2621	SmallVectorImpl<FunctionProtoType::ExtParameterInfo> &NewParamInfos);
2622
2623	void ResetObjCLayout(const ObjCContainerDecl *CD);
2624
2625	//===--------------------------------------------------------------------===//
2626	// Integer Predicates
2627	//===--------------------------------------------------------------------===//
2628
2629	// The width of an integer, as defined in C99 6.2.6.2. This is the number
2630	// of bits in an integer type excluding any padding bits.
2631	unsigned getIntWidth(QualType T) const;
2632
2633	// Per C99 6.2.5p6, for every signed integer type, there is a corresponding
2634	// unsigned integer type. This method takes a signed type, and returns the
2635	// corresponding unsigned integer type.
2636	// With the introduction of fixed point types in ISO N1169, this method also
2637	// accepts fixed point types and returns the corresponding unsigned type for
2638	// a given fixed point type.
2639	QualType getCorrespondingUnsignedType(QualType T) const;
2640
2641	// Per ISO N1169, this method accepts fixed point types and returns the
2642	// corresponding saturated type for a given fixed point type.
2643	QualType getCorrespondingSaturatedType(QualType Ty) const;
2644
2645	// This method accepts fixed point types and returns the corresponding signed
2646	// type. Unlike getCorrespondingUnsignedType(), this only accepts unsigned
2647	// fixed point types because there are unsigned integer types like bool and
2648	// char8_t that don't have signed equivalents.
2649	QualType getCorrespondingSignedFixedPointType(QualType Ty) const;
2650
2651	//===--------------------------------------------------------------------===//
2652	// Integer Values
2653	//===--------------------------------------------------------------------===//
2654
2655	/// Make an APSInt of the appropriate width and signedness for the
2656	/// given \p Value and integer \p Type.
2657	llvm::APSInt MakeIntValue(uint64_t Value, QualType Type) const {
2658	// If Type is a signed integer type larger than 64 bits, we need to be sure
2659	// to sign extend Res appropriately.
2660	llvm::APSInt Res(64, !Type->isSignedIntegerOrEnumerationType());
2661	Res = Value;
2662	unsigned Width = getIntWidth(Type);
2663	if (Width != Res.getBitWidth())
2664	return Res.extOrTrunc(Width);
2665	return Res;
2666	}
2667
2668	bool isSentinelNullExpr(const Expr *E);
2669
2670	/// Get the implementation of the ObjCInterfaceDecl \p D, or nullptr if
2671	/// none exists.
2672	ObjCImplementationDecl getObjCImplementation(ObjCInterfaceDecl D);
2673
2674	/// Get the implementation of the ObjCCategoryDecl \p D, or nullptr if
2675	/// none exists.
2676	ObjCCategoryImplDecl getObjCImplementation(ObjCCategoryDecl D);
2677
2678	/// Return true if there is at least one \@implementation in the TU.
2679	bool AnyObjCImplementation() {
2680	return !ObjCImpls.empty();
2681	}
2682
2683	/// Set the implementation of ObjCInterfaceDecl.
2684	void setObjCImplementation(ObjCInterfaceDecl *IFaceD,
2685	ObjCImplementationDecl *ImplD);
2686
2687	/// Set the implementation of ObjCCategoryDecl.
2688	void setObjCImplementation(ObjCCategoryDecl *CatD,
2689	ObjCCategoryImplDecl *ImplD);
2690
2691	/// Get the duplicate declaration of a ObjCMethod in the same
2692	/// interface, or null if none exists.
2693	const ObjCMethodDecl *
2694	getObjCMethodRedeclaration(const ObjCMethodDecl *MD) const;
2695
2696	void setObjCMethodRedeclaration(const ObjCMethodDecl *MD,
2697	const ObjCMethodDecl *Redecl);
2698
2699	/// Returns the Objective-C interface that \p ND belongs to if it is
2700	/// an Objective-C method/property/ivar etc. that is part of an interface,
2701	/// otherwise returns null.
2702	const ObjCInterfaceDecl getObjContainingInterface(const NamedDecl ND) const;
2703
2704	/// Set the copy inialization expression of a block var decl. \p CanThrow
2705	/// indicates whether the copy expression can throw or not.
2706	void setBlockVarCopyInit(const VarDecl* VD, Expr *CopyExpr, bool CanThrow);
2707
2708	/// Get the copy initialization expression of the VarDecl \p VD, or
2709	/// nullptr if none exists.
2710	BlockVarCopyInit getBlockVarCopyInit(const VarDecl* VD) const;
2711
2712	/// Allocate an uninitialized TypeSourceInfo.
2713	///
2714	/// The caller should initialize the memory held by TypeSourceInfo using
2715	/// the TypeLoc wrappers.
2716	///
2717	/// \param T the type that will be the basis for type source info. This type
2718	/// should refer to how the declarator was written in source code, not to
2719	/// what type semantic analysis resolved the declarator to.
2720	///
2721	/// \param Size the size of the type info to create, or 0 if the size
2722	/// should be calculated based on the type.
2723	TypeSourceInfo *CreateTypeSourceInfo(QualType T, unsigned Size = 0) const;
2724
2725	/// Allocate a TypeSourceInfo where all locations have been
2726	/// initialized to a given location, which defaults to the empty
2727	/// location.
2728	TypeSourceInfo *
2729	getTrivialTypeSourceInfo(QualType T,
2730	SourceLocation Loc = SourceLocation()) const;
2731
2732	/// Add a deallocation callback that will be invoked when the
2733	/// ASTContext is destroyed.
2734	///
2735	/// \param Callback A callback function that will be invoked on destruction.
2736	///
2737	/// \param Data Pointer data that will be provided to the callback function
2738	/// when it is called.
2739	void AddDeallocation(void (Callback)(void), void *Data);
2740
2741	/// If T isn't trivially destructible, calls AddDeallocation to register it
2742	/// for destruction.
2743	template <typename T>
2744	void addDestruction(T *Ptr) {
2745	if (!std::is_trivially_destructible<T>::value) {
2746	auto DestroyPtr = [](void V) { static_cast<T >(V)->~T(); };
2747	AddDeallocation(DestroyPtr, Ptr);
2748	}
2749	}
2750
2751	GVALinkage GetGVALinkageForFunction(const FunctionDecl *FD) const;
2752	GVALinkage GetGVALinkageForVariable(const VarDecl *VD);
2753
2754	/// Determines if the decl can be CodeGen'ed or deserialized from PCH
2755	/// lazily, only when used; this is only relevant for function or file scoped
2756	/// var definitions.
2757	///
2758	/// \returns true if the function/var must be CodeGen'ed/deserialized even if
2759	/// it is not used.
2760	bool DeclMustBeEmitted(const Decl *D);
2761
2762	/// Visits all versions of a multiversioned function with the passed
2763	/// predicate.
2764	void forEachMultiversionedFunctionVersion(
2765	const FunctionDecl *FD,
2766	llvm::function_ref<void(FunctionDecl *)> Pred) const;
2767
2768	const CXXConstructorDecl *
2769	getCopyConstructorForExceptionObject(CXXRecordDecl *RD);
2770
2771	void addCopyConstructorForExceptionObject(CXXRecordDecl *RD,
2772	CXXConstructorDecl *CD);
2773
2774	void addTypedefNameForUnnamedTagDecl(TagDecl TD, TypedefNameDecl TND);
2775
2776	TypedefNameDecl getTypedefNameForUnnamedTagDecl(const TagDecl TD);
2777
2778	void addDeclaratorForUnnamedTagDecl(TagDecl TD, DeclaratorDecl DD);
2779
2780	DeclaratorDecl getDeclaratorForUnnamedTagDecl(const TagDecl TD);
2781
2782	void setManglingNumber(const NamedDecl *ND, unsigned Number);
2783	unsigned getManglingNumber(const NamedDecl *ND) const;
2784
2785	void setStaticLocalNumber(const VarDecl *VD, unsigned Number);
2786	unsigned getStaticLocalNumber(const VarDecl *VD) const;
2787
2788	/// Retrieve the context for computing mangling numbers in the given
2789	/// DeclContext.
2790	MangleNumberingContext &getManglingNumberContext(const DeclContext *DC);
2791
2792	std::unique_ptr<MangleNumberingContext> createMangleNumberingContext() const;
2793
2794	/// Used by ParmVarDecl to store on the side the
2795	/// index of the parameter when it exceeds the size of the normal bitfield.
2796	void setParameterIndex(const ParmVarDecl *D, unsigned index);
2797
2798	/// Used by ParmVarDecl to retrieve on the side the
2799	/// index of the parameter when it exceeds the size of the normal bitfield.
2800	unsigned getParameterIndex(const ParmVarDecl *D) const;
2801
2802	/// Get the storage for the constant value of a materialized temporary
2803	/// of static storage duration.
2804	APValue getMaterializedTemporaryValue(const MaterializeTemporaryExpr E,
2805	bool MayCreate);
2806
2807	//===--------------------------------------------------------------------===//
2808	// Statistics
2809	//===--------------------------------------------------------------------===//
2810
2811	/// The number of implicitly-declared default constructors.
2812	unsigned NumImplicitDefaultConstructors = 0;
2813
2814	/// The number of implicitly-declared default constructors for
2815	/// which declarations were built.
2816	unsigned NumImplicitDefaultConstructorsDeclared = 0;
2817
2818	/// The number of implicitly-declared copy constructors.
2819	unsigned NumImplicitCopyConstructors = 0;
2820
2821	/// The number of implicitly-declared copy constructors for
2822	/// which declarations were built.
2823	unsigned NumImplicitCopyConstructorsDeclared = 0;
2824
2825	/// The number of implicitly-declared move constructors.
2826	unsigned NumImplicitMoveConstructors = 0;
2827
2828	/// The number of implicitly-declared move constructors for
2829	/// which declarations were built.
2830	unsigned NumImplicitMoveConstructorsDeclared = 0;
2831
2832	/// The number of implicitly-declared copy assignment operators.
2833	unsigned NumImplicitCopyAssignmentOperators = 0;
2834
2835	/// The number of implicitly-declared copy assignment operators for
2836	/// which declarations were built.
2837	unsigned NumImplicitCopyAssignmentOperatorsDeclared = 0;
2838
2839	/// The number of implicitly-declared move assignment operators.
2840	unsigned NumImplicitMoveAssignmentOperators = 0;
2841
2842	/// The number of implicitly-declared move assignment operators for
2843	/// which declarations were built.
2844	unsigned NumImplicitMoveAssignmentOperatorsDeclared = 0;
2845
2846	/// The number of implicitly-declared destructors.
2847	unsigned NumImplicitDestructors = 0;
2848
2849	/// The number of implicitly-declared destructors for which
2850	/// declarations were built.
2851	unsigned NumImplicitDestructorsDeclared = 0;
2852
2853	public:
2854	/// Initialize built-in types.
2855	///
2856	/// This routine may only be invoked once for a given ASTContext object.
2857	/// It is normally invoked after ASTContext construction.
2858	///
2859	/// \param Target The target
2860	void InitBuiltinTypes(const TargetInfo &Target,
2861	const TargetInfo *AuxTarget = nullptr);
2862
2863	private:
2864	void InitBuiltinType(CanQualType &R, BuiltinType::Kind K);
2865
2866	// Return the Objective-C type encoding for a given type.
2867	void getObjCEncodingForTypeImpl(QualType t, std::string &S,
2868	bool ExpandPointedToStructures,
2869	bool ExpandStructures,
2870	const FieldDecl *Field,
2871	bool OutermostType = false,
2872	bool EncodingProperty = false,
2873	bool StructField = false,
2874	bool EncodeBlockParameters = false,
2875	bool EncodeClassNames = false,
2876	bool EncodePointerToObjCTypedef = false,
2877	QualType *NotEncodedT=nullptr) const;
2878
2879	// Adds the encoding of the structure's members.
2880	void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S,
2881	const FieldDecl *Field,
2882	bool includeVBases = true,
2883	QualType *NotEncodedT=nullptr) const;
2884
2885	public:
2886	// Adds the encoding of a method parameter or return type.
2887	void getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT,
2888	QualType T, std::string& S,
2889	bool Extended) const;
2890
2891	/// Returns true if this is an inline-initialized static data member
2892	/// which is treated as a definition for MSVC compatibility.
2893	bool isMSStaticDataMemberInlineDefinition(const VarDecl *VD) const;
2894
2895	enum class InlineVariableDefinitionKind {
2896	/// Not an inline variable.
2897	None,
2898
2899	/// Weak definition of inline variable.
2900	Weak,
2901
2902	/// Weak for now, might become strong later in this TU.
2903	WeakUnknown,
2904
2905	/// Strong definition.
2906	Strong
2907	};
2908
2909	/// Determine whether a definition of this inline variable should
2910	/// be treated as a weak or strong definition. For compatibility with
2911	/// C++14 and before, for a constexpr static data member, if there is an
2912	/// out-of-line declaration of the member, we may promote it from weak to
2913	/// strong.
2914	InlineVariableDefinitionKind
2915	getInlineVariableDefinitionKind(const VarDecl *VD) const;
2916
2917	private:
2918	friend class DeclarationNameTable;
2919	friend class DeclContext;
2920
2921	const ASTRecordLayout &
2922	getObjCLayout(const ObjCInterfaceDecl *D,
2923	const ObjCImplementationDecl *Impl) const;
2924
2925	/// A set of deallocations that should be performed when the
2926	/// ASTContext is destroyed.
2927	// FIXME: We really should have a better mechanism in the ASTContext to
2928	// manage running destructors for types which do variable sized allocation
2929	// within the AST. In some places we thread the AST bump pointer allocator
2930	// into the datastructures which avoids this mess during deallocation but is
2931	// wasteful of memory, and here we require a lot of error prone book keeping
2932	// in order to track and run destructors while we're tearing things down.
2933	using DeallocationFunctionsAndArguments =
2934	llvm::SmallVector<std::pair<void ()(void ), void *>, 16>;
2935	DeallocationFunctionsAndArguments Deallocations;
2936
2937	// FIXME: This currently contains the set of StoredDeclMaps used
2938	// by DeclContext objects. This probably should not be in ASTContext,
2939	// but we include it here so that ASTContext can quickly deallocate them.
2940	llvm::PointerIntPair<StoredDeclsMap *, 1> LastSDM;
2941
2942	std::vector<Decl *> TraversalScope;
2943	class ParentMap;
2944	std::unique_ptr<ParentMap> Parents;
2945
2946	std::unique_ptr<VTableContextBase> VTContext;
2947
2948	void ReleaseDeclContextMaps();
2949
2950	public:
2951	enum PragmaSectionFlag : unsigned {
2952	PSF_None = 0,
2953	PSF_Read = 0x1,
2954	PSF_Write = 0x2,
2955	PSF_Execute = 0x4,
2956	PSF_Implicit = 0x8,
2957	PSF_Invalid = 0x80000000U,
2958	};
2959
2960	struct SectionInfo {
2961	DeclaratorDecl *Decl;
2962	SourceLocation PragmaSectionLocation;
2963	int SectionFlags;
2964
2965	SectionInfo() = default;
2966	SectionInfo(DeclaratorDecl *Decl,
2967	SourceLocation PragmaSectionLocation,
2968	int SectionFlags)
2969	: Decl(Decl), PragmaSectionLocation(PragmaSectionLocation),
2970	SectionFlags(SectionFlags) {}
2971	};
2972
2973	llvm::StringMap<SectionInfo> SectionInfos;
2974	};
2975
2976	/// Utility function for constructing a nullary selector.
2977	inline Selector GetNullarySelector(StringRef name, ASTContext &Ctx) {
2978	IdentifierInfo* II = &Ctx.Idents.get(name);
2979	return Ctx.Selectors.getSelector(0, &II);
2980	}
2981
2982	/// Utility function for constructing an unary selector.
2983	inline Selector GetUnarySelector(StringRef name, ASTContext &Ctx) {
2984	IdentifierInfo* II = &Ctx.Idents.get(name);
2985	return Ctx.Selectors.getSelector(1, &II);
2986	}
2987
2988	} // namespace clang
2989
2990	// operator new and delete aren't allowed inside namespaces.
2991
2992	/// Placement new for using the ASTContext's allocator.
2993	///
2994	/// This placement form of operator new uses the ASTContext's allocator for
2995	/// obtaining memory.
2996	///
2997	/// IMPORTANT: These are also declared in clang/AST/ASTContextAllocate.h!
2998	/// Any changes here need to also be made there.
2999	///
3000	/// We intentionally avoid using a nothrow specification here so that the calls
3001	/// to this operator will not perform a null check on the result -- the
3002	/// underlying allocator never returns null pointers.
3003	///
3004	/// Usage looks like this (assuming there's an ASTContext 'Context' in scope):
3005	/// @code
3006	/// // Default alignment (8)
3007	/// IntegerLiteral *Ex = new (Context) IntegerLiteral(arguments);
3008	/// // Specific alignment
3009	/// IntegerLiteral *Ex2 = new (Context, 4) IntegerLiteral(arguments);
3010	/// @endcode
3011	/// Memory allocated through this placement new operator does not need to be
3012	/// explicitly freed, as ASTContext will free all of this memory when it gets
3013	/// destroyed. Please note that you cannot use delete on the pointer.
3014	///
3015	/// @param Bytes The number of bytes to allocate. Calculated by the compiler.
3016	/// @param C The ASTContext that provides the allocator.
3017	/// @param Alignment The alignment of the allocated memory (if the underlying
3018	/// allocator supports it).
3019	/// @return The allocated memory. Could be nullptr.
3020	inline void *operator new(size_t Bytes, const clang::ASTContext &C,
3021	size_t Alignment /* = 8 */) {
3022	return C.Allocate(Bytes, Alignment);
3023	}
3024
3025	/// Placement delete companion to the new above.
3026	///
3027	/// This operator is just a companion to the new above. There is no way of
3028	/// invoking it directly; see the new operator for more details. This operator
3029	/// is called implicitly by the compiler if a placement new expression using
3030	/// the ASTContext throws in the object constructor.
3031	inline void operator delete(void *Ptr, const clang::ASTContext &C, size_t) {
3032	C.Deallocate(Ptr);
3033	}
3034
3035	/// This placement form of operator new[] uses the ASTContext's allocator for
3036	/// obtaining memory.
3037	///
3038	/// We intentionally avoid using a nothrow specification here so that the calls
3039	/// to this operator will not perform a null check on the result -- the
3040	/// underlying allocator never returns null pointers.
3041	///
3042	/// Usage looks like this (assuming there's an ASTContext 'Context' in scope):
3043	/// @code
3044	/// // Default alignment (8)
3045	/// char *data = new (Context) char[10];
3046	/// // Specific alignment
3047	/// char *data = new (Context, 4) char[10];
3048	/// @endcode
3049	/// Memory allocated through this placement new[] operator does not need to be
3050	/// explicitly freed, as ASTContext will free all of this memory when it gets
3051	/// destroyed. Please note that you cannot use delete on the pointer.
3052	///
3053	/// @param Bytes The number of bytes to allocate. Calculated by the compiler.
3054	/// @param C The ASTContext that provides the allocator.
3055	/// @param Alignment The alignment of the allocated memory (if the underlying
3056	/// allocator supports it).
3057	/// @return The allocated memory. Could be nullptr.
3058	inline void *operator new[](size_t Bytes, const clang::ASTContext& C,
3059	size_t Alignment /* = 8 */) {
3060	return C.Allocate(Bytes, Alignment);
3061	}
3062
3063	/// Placement delete[] companion to the new[] above.
3064	///
3065	/// This operator is just a companion to the new[] above. There is no way of
3066	/// invoking it directly; see the new[] operator for more details. This operator
3067	/// is called implicitly by the compiler if a placement new[] expression using
3068	/// the ASTContext throws in the object constructor.
3069	inline void operator delete[](void *Ptr, const clang::ASTContext &C, size_t) {
3070	C.Deallocate(Ptr);
3071	}
3072
3073	/// Create the representation of a LazyGenerationalUpdatePtr.
3074	template <typename Owner, typename T,
3075	void (clang::ExternalASTSource::*Update)(Owner)>
3076	typename clang::LazyGenerationalUpdatePtr<Owner, T, Update>::ValueType
3077	clang::LazyGenerationalUpdatePtr<Owner, T, Update>::makeValue(
3078	const clang::ASTContext &Ctx, T Value) {
3079	// Note, this is implemented here so that ExternalASTSource.h doesn't need to
3080	// include ASTContext.h. We explicitly instantiate it for all relevant types
3081	// in ASTContext.cpp.
3082	if (auto *Source = Ctx.getExternalSource())
3083	return new (Ctx) LazyData(Source, Value);
3084	return Value;
3085	}
3086
3087	#endif // LLVM_CLANG_AST_ASTCONTEXT_H
3088