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-rw-r--r--include/clang/AST/ExternalASTMerger.h38
1 files changed, 33 insertions, 5 deletions
diff --git a/include/clang/AST/ExternalASTMerger.h b/include/clang/AST/ExternalASTMerger.h
index d89189da04f0..0230495a5ef3 100644
--- a/include/clang/AST/ExternalASTMerger.h
+++ b/include/clang/AST/ExternalASTMerger.h
@@ -14,6 +14,7 @@
#define LLVM_CLANG_AST_EXTERNALASTMERGER_H
#include "clang/AST/ASTImporter.h"
+#include "clang/AST/ASTImporterSharedState.h"
#include "clang/AST/ExternalASTSource.h"
#include "llvm/Support/raw_ostream.h"
@@ -22,7 +23,7 @@ namespace clang {
/// ExternalASTSource implementation that merges information from several
/// ASTContexts.
///
-/// ExtermalASTMerger maintains a vector of ASTImporters that it uses to import
+/// ExternalASTMerger maintains a vector of ASTImporters that it uses to import
/// (potentially incomplete) Decls and DeclContexts from the source ASTContexts
/// in response to ExternalASTSource API calls.
///
@@ -36,7 +37,7 @@ namespace clang {
/// lookup. In this case, Origins contains an entry overriding lookup and
/// specifying the correct pair of DeclContext/ASTContext.
///
-/// - The DeclContext of origin was determined by another ExterenalASTMerger.
+/// - The DeclContext of origin was determined by another ExternalASTMerger.
/// (This is possible when the source ASTContext for one of the Importers has
/// its own ExternalASTMerger). The origin must be properly forwarded in this
/// case.
@@ -79,20 +80,47 @@ public:
/// import SourceLocations properly. Additionally, when import occurs for
/// a DeclContext whose origin has been overridden, then this
/// ExternalASTMerger must be able to determine that.
- struct ImporterSource {
+ class ImporterSource {
ASTContext *
FileManager &FM;
const OriginMap &OM;
+ /// True iff the source only exists temporary, i.e., it will be removed from
+ /// the ExternalASTMerger during the life time of the ExternalASTMerger.
+ bool Temporary;
+ /// If the ASTContext of this source has an ExternalASTMerger that imports
+ /// into this source, then this will point to that other ExternalASTMerger.
+ ExternalASTMerger *Merger;
+
+ public:
+ ImporterSource(ASTContext &AST, FileManager &FM, const OriginMap &OM,
+ bool Temporary = false, ExternalASTMerger *Merger = nullptr)
+ : AST(AST), FM(FM), OM(OM), Temporary(Temporary), Merger(Merger) {}
+ ASTContext &getASTContext() const { return AST; }
+ FileManager &getFileManager() const { return FM; }
+ const OriginMap &getOriginMap() const { return OM; }
+ bool isTemporary() const { return Temporary; }
+ ExternalASTMerger *getMerger() const { return Merger; }
};
private:
- /// The target for this ExtenralASTMerger.
+ /// The target for this ExternalASTMerger.
ImporterTarget Target;
+ /// ExternalASTMerger has multiple ASTImporters that import into the same
+ /// TU. This is the shared state for all ASTImporters of this
+ /// ExternalASTMerger.
+ /// See also the CrossTranslationUnitContext that has a similar setup.
+ std::shared_ptr<ASTImporterSharedState> SharedState;
public:
ExternalASTMerger(const ImporterTarget &Target,
llvm::ArrayRef<ImporterSource> Sources);
+ /// Asks all connected ASTImporters if any of them imported the given
+ /// declaration. If any ASTImporter did import the given declaration,
+ /// then this function returns the declaration that D was imported from.
+ /// Returns nullptr if no ASTImporter did import import D.
+ Decl *FindOriginalDecl(Decl *D);
+
/// Add a set of ASTContexts as possible origins.
///
/// Usually the set will be initialized in the constructor, but long-lived
@@ -145,7 +173,7 @@ public:
/// OriginContext.
bool HasImporterForOrigin(ASTContext &OriginContext);
- /// Returns a reference to the ASTRImporter from Importers whose origin
+ /// Returns a reference to the ASTImporter from Importers whose origin
/// is OriginContext. This allows manual import of ASTs while preserving the
/// OriginMap correctly.
ASTImporter &ImporterForOrigin(ASTContext &OriginContext);