| 1 | //===- ASTImporterSharedState.h - ASTImporter specific state --*- C++ -*---===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // |
| 9 | // This file defines the ASTImporter specific state, which may be shared |
| 10 | // amongst several ASTImporter objects. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef LLVM_CLANG_AST_ASTIMPORTERSHAREDSTATE_H |
| 15 | #define LLVM_CLANG_AST_ASTIMPORTERSHAREDSTATE_H |
| 16 | |
| 17 | #include "clang/AST/ASTImportError.h" |
| 18 | #include "clang/AST/ASTImporterLookupTable.h" |
| 19 | #include "clang/AST/Decl.h" |
| 20 | #include "llvm/ADT/DenseMap.h" |
| 21 | #include <optional> |
| 22 | |
| 23 | namespace clang { |
| 24 | |
| 25 | class TranslationUnitDecl; |
| 26 | |
| 27 | /// Importer specific state, which may be shared amongst several ASTImporter |
| 28 | /// objects. |
| 29 | class ASTImporterSharedState { |
| 30 | |
| 31 | /// Pointer to the import specific lookup table. |
| 32 | std::unique_ptr<ASTImporterLookupTable> LookupTable; |
| 33 | |
| 34 | /// Mapping from the already-imported declarations in the "to" |
| 35 | /// context to the error status of the import of that declaration. |
| 36 | /// This map contains only the declarations that were not correctly |
| 37 | /// imported. The same declaration may or may not be included in |
| 38 | /// ImportedFromDecls. This map is updated continuously during imports and |
| 39 | /// never cleared (like ImportedFromDecls). |
| 40 | llvm::DenseMap<Decl *, ASTImportError> ImportErrors; |
| 41 | |
| 42 | /// Set of the newly created declarations. |
| 43 | llvm::DenseSet<Decl *> NewDecls; |
| 44 | |
| 45 | // FIXME put ImportedFromDecls here! |
| 46 | // And from that point we can better encapsulate the lookup table. |
| 47 | |
| 48 | public: |
| 49 | ASTImporterSharedState() = default; |
| 50 | |
| 51 | ASTImporterSharedState(TranslationUnitDecl &ToTU) { |
| 52 | LookupTable = std::make_unique<ASTImporterLookupTable>(args&: ToTU); |
| 53 | } |
| 54 | |
| 55 | ASTImporterLookupTable *getLookupTable() { return LookupTable.get(); } |
| 56 | |
| 57 | void addDeclToLookup(Decl *D) { |
| 58 | if (LookupTable) |
| 59 | if (auto *ND = dyn_cast<NamedDecl>(Val: D)) |
| 60 | LookupTable->add(ND); |
| 61 | } |
| 62 | |
| 63 | void removeDeclFromLookup(Decl *D) { |
| 64 | if (LookupTable) |
| 65 | if (auto *ND = dyn_cast<NamedDecl>(Val: D)) |
| 66 | LookupTable->remove(ND); |
| 67 | } |
| 68 | |
| 69 | std::optional<ASTImportError> getImportDeclErrorIfAny(Decl *ToD) const { |
| 70 | auto Pos = ImportErrors.find(Val: ToD); |
| 71 | if (Pos != ImportErrors.end()) |
| 72 | return Pos->second; |
| 73 | else |
| 74 | return std::nullopt; |
| 75 | } |
| 76 | |
| 77 | void setImportDeclError(Decl *To, ASTImportError Error) { |
| 78 | ImportErrors[To] = Error; |
| 79 | } |
| 80 | |
| 81 | bool isNewDecl(const Decl *ToD) const { return NewDecls.count(V: ToD); } |
| 82 | |
| 83 | void markAsNewDecl(Decl *ToD) { NewDecls.insert(V: ToD); } |
| 84 | }; |
| 85 | |
| 86 | } // namespace clang |
| 87 | #endif // LLVM_CLANG_AST_ASTIMPORTERSHAREDSTATE_H |
| 88 |