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usr / src / contrib / llvm-project / clang / include / clang / AST /

📁 ..
📄 APValue.h(20.92 KB)
📄 AST.h(907 B)
📄 ASTConcept.h(7.02 KB)
📄 ASTConsumer.h(5.99 KB)
📄 ASTContext.h(122.68 KB)
📄 ASTContextAllocate.h(1.33 KB)
📄 ASTDiagnostic.h(1.34 KB)
📄 ASTDumper.h(1.59 KB)
📄 ASTDumperUtils.h(3.49 KB)
📄 ASTFwd.h(1.01 KB)
📄 ASTImporter.h(22.86 KB)
📄 ASTImporterLookupTable.h(2.7 KB)
📄 ASTImporterSharedState.h(2.51 KB)
📄 ASTLambda.h(3.04 KB)
📄 ASTMutationListener.h(5.84 KB)
📄 ASTNodeTraverser.h(21.38 KB)
📄 ASTStructuralEquivalence.h(5.08 KB)
📄 ASTTypeTraits.h(19.65 KB)
📄 ASTUnresolvedSet.h(3.37 KB)
📄 ASTVector.h(11.75 KB)
📄 AbstractBasicReader.h(8.82 KB)
📄 AbstractBasicWriter.h(7.97 KB)
📄 AbstractTypeReader.h(922 B)
📄 AbstractTypeWriter.h(944 B)
📄 Attr.h(11.87 KB)
📄 AttrIterator.h(4.14 KB)
📄 AttrVisitor.h(2.56 KB)
📄 Availability.h(1.97 KB)
📄 BaseSubobject.h(2.74 KB)
📄 BuiltinTypes.def(9.91 KB)
📄 CXXInheritance.h(14.87 KB)
📄 CXXRecordDeclDefinitionBits.def(9.23 KB)
📄 CanonicalType.h(24.86 KB)
📄 CharUnits.h(8.02 KB)
📄 Comment.h(31.03 KB)
📄 CommentBriefParser.h(1.39 KB)
📄 CommentCommandTraits.h(5.86 KB)
📄 CommentCommands.td(9.27 KB)
📄 CommentDiagnostic.h(509 B)
📄 CommentHTMLNamedCharacterReferences.td(4.98 KB)
📄 CommentHTMLTags.td(2.17 KB)
📄 CommentLexer.h(9.96 KB)
📄 CommentParser.h(3.24 KB)
📄 CommentSema.h(9.87 KB)
📄 CommentVisitor.h(2.38 KB)
📄 ComparisonCategories.h(7.41 KB)
📄 ComputeDependence.h(7.41 KB)
📄 CurrentSourceLocExprScope.h(2.43 KB)
📄 DataCollection.h(2.45 KB)
📄 Decl.h(168.07 KB)
📄 DeclAccessPair.h(1.77 KB)
📄 DeclBase.h(93.13 KB)
📄 DeclCXX.h(151.69 KB)
📄 DeclContextInternals.h(8.22 KB)
📄 DeclFriend.h(8.06 KB)
📄 DeclGroup.h(4.11 KB)
📄 DeclLookups.h(3.64 KB)
📄 DeclObjC.h(101.2 KB)
📄 DeclObjCCommon.h(1.72 KB)
📄 DeclOpenMP.h(19.33 KB)
📄 DeclTemplate.h(122.19 KB)
📄 DeclVisitor.h(2.51 KB)
📄 DeclarationName.h(33.77 KB)
📄 DependenceFlags.h(10.99 KB)
📄 DependentDiagnostic.h(5.4 KB)
📄 EvaluatedExprVisitor.h(4.45 KB)
📄 Expr.h(234.85 KB)
📄 ExprCXX.h(169.78 KB)
📄 ExprConcepts.h(19.62 KB)
📄 ExprObjC.h(58.96 KB)
📄 ExprOpenMP.h(15.48 KB)
📄 ExternalASTMerger.h(8.11 KB)
📄 ExternalASTSource.h(20.55 KB)
📄 FormatString.h(22.81 KB)
📄 GlobalDecl.h(7.16 KB)
📄 JSONNodeDumper.h(17.53 KB)
📄 LambdaCapture.h(4.71 KB)
📄 LexicallyOrderedRecursiveASTVisitor.h(5.92 KB)
📄 LocInfoType.h(1.84 KB)
📄 Mangle.h(10.65 KB)
📄 MangleNumberingContext.h(2 KB)
📄 NSAPI.h(9.23 KB)
📄 NestedNameSpecifier.h(18.53 KB)
📄 NonTrivialTypeVisitor.h(4 KB)
📄 ODRHash.h(3.42 KB)
📄 OSLog.h(5.08 KB)
📄 OpenMPClause.h(276.08 KB)
📄 OperationKinds.def(14.91 KB)
📄 OperationKinds.h(1.5 KB)
📄 OptionalDiagnostic.h(2.39 KB)
📄 ParentMap.h(1.89 KB)
📄 ParentMapContext.h(4.74 KB)
📄 PrettyDeclStackTrace.h(1.39 KB)
📄 PrettyPrinter.h(8.47 KB)
📄 PropertiesBase.td(17.03 KB)
📄 QualTypeNames.h(3.15 KB)
📄 RawCommentList.h(6.6 KB)
📄 RecordLayout.h(11.49 KB)
📄 RecursiveASTVisitor.h(124.41 KB)
📄 Redeclarable.h(14.34 KB)
📄 SelectorLocationsKind.h(3.28 KB)
📄 Stmt.h(113 KB)
📄 StmtCXX.h(17.59 KB)
📄 StmtDataCollectors.td(5.64 KB)
📄 StmtGraphTraits.h(2.18 KB)
📄 StmtIterator.h(4.2 KB)
📄 StmtObjC.h(12.86 KB)
📄 StmtOpenMP.h(189.5 KB)
📄 StmtVisitor.h(8.74 KB)
📄 TemplateArgumentVisitor.h(3.38 KB)
📄 TemplateBase.h(22.86 KB)
📄 TemplateName.h(19.34 KB)
📄 TextNodeDumper.h(15.7 KB)
📄 Type.h(248.38 KB)
📄 TypeLoc.h(73.03 KB)
📄 TypeLocNodes.def(1.45 KB)
📄 TypeLocVisitor.h(1.76 KB)
📄 TypeOrdering.h(2.38 KB)
📄 TypeProperties.td(25.87 KB)
📄 TypeVisitor.h(3.32 KB)
📄 UnresolvedSet.h(5.25 KB)
📄 VTTBuilder.h(5.19 KB)
📄 VTableBuilder.h(20.31 KB)

Editing: ExternalASTMerger.h

//===--- ExternalASTMerger.h - Merging External AST Interface ---*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
//  This file declares the ExternalASTMerger, which vends a combination of ASTs
//  from several different ASTContext/FileManager pairs
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_AST_EXTERNALASTMERGER_H
#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"

namespace clang {

/// ExternalASTSource implementation that merges information from several
/// ASTContexts.
///
/// 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.
///
/// When lookup occurs in the resulting imported DeclContexts, the original
/// DeclContexts need to be queried.  Roughly, there are three cases here:
///
/// - The DeclContext of origin can be found by simple name lookup.  In this
///   case, no additional state is required.
///
/// - The DeclContext of origin is different from what would be found by name
///   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 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.
///
/// ExternalASTMerger's job is to maintain the data structures necessary to
/// allow this.  The data structures themselves can be extracted (read-only) and
/// copied for re-use.
class ExternalASTMerger : public ExternalASTSource {
public:
  /// A single origin for a DeclContext.  Unlike Decls, DeclContexts do
  /// not allow their containing ASTContext to be determined in all cases.
  struct DCOrigin {
    DeclContext *DC;
    ASTContext *AST;
  };

typedef std::map<const DeclContext *, DCOrigin> OriginMap;
  typedef std::vector<std::unique_ptr<ASTImporter>> ImporterVector;
private:
  /// One importer exists for each source.
  ImporterVector Importers;
  /// Overrides in case name lookup would return nothing or would return
  /// the wrong thing.
  OriginMap Origins;
  /// The installed log stream.
  llvm::raw_ostream *LogStream;

public:
  /// The target for an ExternalASTMerger.
  ///
  /// ASTImporters require both ASTContext and FileManager to be able to
  /// import SourceLocations properly.
  struct ImporterTarget {
    ASTContext &AST;
    FileManager &FM;
  };
  /// A source for an ExternalASTMerger.
  ///
  /// ASTImporters require both ASTContext and FileManager to be able to
  /// import SourceLocations properly.  Additionally, when import occurs for
  /// a DeclContext whose origin has been overridden, then this
  /// ExternalASTMerger must be able to determine that.
  class ImporterSource {
    ASTContext &AST;
    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 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
  /// ExternalASTMergers may need to import from new sources (for example,
  /// newly-parsed source files).
  ///
  /// Ensures that Importers does not gain duplicate entries as a result.
  void AddSources(llvm::ArrayRef<ImporterSource> Sources);

/// Remove a set of ASTContexts as possible origins.
  ///
  /// Sometimes an origin goes away (for example, if a source file gets
  /// superseded by a newer version).
  ///
  /// The caller is responsible for ensuring that this doesn't leave
  /// DeclContexts that can't be completed.
  void RemoveSources(llvm::ArrayRef<ImporterSource> Sources);

/// Implementation of the ExternalASTSource API.
  bool FindExternalVisibleDeclsByName(const DeclContext *DC,
                                      DeclarationName Name) override;

/// Implementation of the ExternalASTSource API.
  void
  FindExternalLexicalDecls(const DeclContext *DC,
                           llvm::function_ref<bool(Decl::Kind)> IsKindWeWant,
                           SmallVectorImpl<Decl *> &Result) override;

/// Implementation of the ExternalASTSource API.
  void CompleteType(TagDecl *Tag) override;

/// Implementation of the ExternalASTSource API.
  void CompleteType(ObjCInterfaceDecl *Interface) override;

/// Returns true if DC can be found in any source AST context.
  bool CanComplete(DeclContext *DC);

/// Records an origin in Origins only if name lookup would find
  /// something different or nothing at all.
  void MaybeRecordOrigin(const DeclContext *ToDC, DCOrigin Origin);

/// Regardless of any checks, override the Origin for a DeclContext.
  void ForceRecordOrigin(const DeclContext *ToDC, DCOrigin Origin);

/// Get a read-only view of the Origins map, for use in constructing
  /// an ImporterSource for another ExternalASTMerger.
  const OriginMap &GetOrigins() { return Origins; }

/// Returns true if Importers contains an ASTImporter whose source is
  /// OriginContext.
  bool HasImporterForOrigin(ASTContext &OriginContext);

/// 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);

/// Sets the current log stream.
  void SetLogStream(llvm::raw_string_ostream &Stream) { LogStream = &Stream; }
private:
  /// Records and origin in Origins.
  void RecordOriginImpl(const DeclContext *ToDC, DCOrigin Origin,
                                  ASTImporter &importer);

/// Performs an action for every DeclContext that is identified as
  /// corresponding (either by forced origin or by name lookup) to DC.
  template <typename CallbackType>
  void ForEachMatchingDC(const DeclContext *DC, CallbackType Callback);

public:
  /// Log something if there is a logging callback installed.
  llvm::raw_ostream &logs() { return *LogStream; }

/// True if the log stream is not llvm::nulls();
  bool LoggingEnabled() { return LogStream != &llvm::nulls(); }
};

} // end namespace clang

#endif

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