clang  10.0.0git
ASTImporterSharedState.h
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1 //===- ASTImporterSharedState.h - ASTImporter specific state --*- C++ -*---===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file defines the ASTImporter specific state, which may be shared
11 // amongst several ASTImporter objects.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_CLANG_AST_ASTIMPORTERSHAREDSTATE_H
16 #define LLVM_CLANG_AST_ASTIMPORTERSHAREDSTATE_H
17 
19 #include "clang/AST/Decl.h"
20 #include "llvm/ADT/DenseMap.h"
21 // FIXME We need this because of ImportError.
22 #include "clang/AST/ASTImporter.h"
23 
24 namespace clang {
25 
26 class TranslationUnitDecl;
27 
28 /// Importer specific state, which may be shared amongst several ASTImporter
29 /// objects.
31 
32  /// Pointer to the import specific lookup table.
33  std::unique_ptr<ASTImporterLookupTable> LookupTable;
34 
35  /// Mapping from the already-imported declarations in the "to"
36  /// context to the error status of the import of that declaration.
37  /// This map contains only the declarations that were not correctly
38  /// imported. The same declaration may or may not be included in
39  /// ImportedFromDecls. This map is updated continuously during imports and
40  /// never cleared (like ImportedFromDecls).
41  llvm::DenseMap<Decl *, ImportError> ImportErrors;
42 
43  // FIXME put ImportedFromDecls here!
44  // And from that point we can better encapsulate the lookup table.
45 
46 public:
47  ASTImporterSharedState() = default;
48 
50  LookupTable = std::make_unique<ASTImporterLookupTable>(ToTU);
51  }
52 
53  ASTImporterLookupTable *getLookupTable() { return LookupTable.get(); }
54 
55  void addDeclToLookup(Decl *D) {
56  if (LookupTable)
57  if (auto *ND = dyn_cast<NamedDecl>(D))
58  LookupTable->add(ND);
59  }
60 
62  if (LookupTable)
63  if (auto *ND = dyn_cast<NamedDecl>(D))
64  LookupTable->remove(ND);
65  }
66 
68  auto Pos = ImportErrors.find(ToD);
69  if (Pos != ImportErrors.end())
70  return Pos->second;
71  else
72  return Optional<ImportError>();
73  }
74 
76  ImportErrors[To] = Error;
77  }
78 };
79 
80 } // namespace clang
81 #endif // LLVM_CLANG_AST_ASTIMPORTERSHAREDSTATE_H
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:88
Importer specific state, which may be shared amongst several ASTImporter objects. ...
ASTImporterSharedState(TranslationUnitDecl &ToTU)
ASTImporterLookupTable * getLookupTable()
Dataflow Directional Tag Classes.
void setImportDeclError(Decl *To, ImportError Error)
llvm::Optional< ImportError > getImportDeclErrorIfAny(Decl *ToD) const
The top declaration context.
Definition: Decl.h:82