1 | //===- ExternalASTSource.cpp - Abstract External AST Interface ------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file provides the default implementation of the ExternalASTSource |
10 | // interface, which enables construction of AST nodes from some external |
11 | // source. |
12 | // |
13 | //===----------------------------------------------------------------------===// |
14 | |
15 | #include "clang/AST/ExternalASTSource.h" |
16 | #include "clang/AST/ASTContext.h" |
17 | #include "clang/AST/DeclarationName.h" |
18 | #include "clang/Basic/FileManager.h" |
19 | #include "clang/Basic/IdentifierTable.h" |
20 | #include "clang/Basic/LLVM.h" |
21 | #include "clang/Basic/Module.h" |
22 | #include "clang/Basic/SourceManager.h" |
23 | #include "llvm/Support/ErrorHandling.h" |
24 | #include <cstdint> |
25 | #include <optional> |
26 | |
27 | using namespace clang; |
28 | |
29 | char ExternalASTSource::ID; |
30 | |
31 | ExternalASTSource::~ExternalASTSource() = default; |
32 | |
33 | std::optional<ASTSourceDescriptor> |
34 | ExternalASTSource::getSourceDescriptor(unsigned ID) { |
35 | return std::nullopt; |
36 | } |
37 | |
38 | ExternalASTSource::ExtKind |
39 | ExternalASTSource::hasExternalDefinitions(const Decl *D) { |
40 | return EK_ReplyHazy; |
41 | } |
42 | |
43 | void ExternalASTSource::FindFileRegionDecls(FileID File, unsigned Offset, |
44 | unsigned Length, |
45 | SmallVectorImpl<Decl *> &Decls) {} |
46 | |
47 | void ExternalASTSource::CompleteRedeclChain(const Decl *D) {} |
48 | |
49 | void ExternalASTSource::CompleteType(TagDecl *Tag) {} |
50 | |
51 | void ExternalASTSource::CompleteType(ObjCInterfaceDecl *Class) {} |
52 | |
53 | void ExternalASTSource::() {} |
54 | |
55 | void ExternalASTSource::StartedDeserializing() {} |
56 | |
57 | void ExternalASTSource::FinishedDeserializing() {} |
58 | |
59 | void ExternalASTSource::StartTranslationUnit(ASTConsumer *Consumer) {} |
60 | |
61 | void ExternalASTSource::PrintStats() {} |
62 | |
63 | bool ExternalASTSource::layoutRecordType( |
64 | const RecordDecl *Record, uint64_t &Size, uint64_t &Alignment, |
65 | llvm::DenseMap<const FieldDecl *, uint64_t> &FieldOffsets, |
66 | llvm::DenseMap<const CXXRecordDecl *, CharUnits> &BaseOffsets, |
67 | llvm::DenseMap<const CXXRecordDecl *, CharUnits> &VirtualBaseOffsets) { |
68 | return false; |
69 | } |
70 | |
71 | Decl *ExternalASTSource::GetExternalDecl(uint32_t ID) { |
72 | return nullptr; |
73 | } |
74 | |
75 | Selector ExternalASTSource::GetExternalSelector(uint32_t ID) { |
76 | return Selector(); |
77 | } |
78 | |
79 | uint32_t ExternalASTSource::GetNumExternalSelectors() { |
80 | return 0; |
81 | } |
82 | |
83 | Stmt *ExternalASTSource::GetExternalDeclStmt(uint64_t Offset) { |
84 | return nullptr; |
85 | } |
86 | |
87 | CXXCtorInitializer ** |
88 | ExternalASTSource::GetExternalCXXCtorInitializers(uint64_t Offset) { |
89 | return nullptr; |
90 | } |
91 | |
92 | CXXBaseSpecifier * |
93 | ExternalASTSource::GetExternalCXXBaseSpecifiers(uint64_t Offset) { |
94 | return nullptr; |
95 | } |
96 | |
97 | bool |
98 | ExternalASTSource::FindExternalVisibleDeclsByName(const DeclContext *DC, |
99 | DeclarationName Name) { |
100 | return false; |
101 | } |
102 | |
103 | void ExternalASTSource::completeVisibleDeclsMap(const DeclContext *DC) {} |
104 | |
105 | void ExternalASTSource::FindExternalLexicalDecls( |
106 | const DeclContext *DC, llvm::function_ref<bool(Decl::Kind)> IsKindWeWant, |
107 | SmallVectorImpl<Decl *> &Result) {} |
108 | |
109 | void ExternalASTSource::getMemoryBufferSizes(MemoryBufferSizes &sizes) const {} |
110 | |
111 | uint32_t ExternalASTSource::incrementGeneration(ASTContext &C) { |
112 | uint32_t OldGeneration = CurrentGeneration; |
113 | |
114 | // Make sure the generation of the topmost external source for the context is |
115 | // incremented. That might not be us. |
116 | auto *P = C.getExternalSource(); |
117 | if (P && P != this) |
118 | CurrentGeneration = P->incrementGeneration(C); |
119 | else { |
120 | // FIXME: Only bump the generation counter if the current generation number |
121 | // has been observed? |
122 | if (!++CurrentGeneration) |
123 | llvm::report_fatal_error(reason: "generation counter overflowed" , gen_crash_diag: false); |
124 | } |
125 | |
126 | return OldGeneration; |
127 | } |
128 | |