clang  6.0.0svn
ASTMerge.cpp
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1 //===-- ASTMerge.cpp - AST Merging Frontent Action --------------*- 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 //===----------------------------------------------------------------------===//
10 #include "clang/AST/ASTContext.h"
12 #include "clang/AST/ASTImporter.h"
13 #include "clang/Basic/Diagnostic.h"
16 
17 using namespace clang;
18 
19 std::unique_ptr<ASTConsumer>
21  return AdaptedAction->CreateASTConsumer(CI, InFile);
22 }
23 
25  // FIXME: This is a hack. We need a better way to communicate the
26  // AST file, compiler instance, and file name than member variables
27  // of FrontendAction.
28  AdaptedAction->setCurrentInput(getCurrentInput(), takeCurrentASTUnit());
29  AdaptedAction->setCompilerInstance(&CI);
30  return AdaptedAction->BeginSourceFileAction(CI);
31 }
32 
36  CI.getASTContext().getLangOpts());
38  &CI.getASTContext());
40  DiagIDs(CI.getDiagnostics().getDiagnosticIDs());
41  for (unsigned I = 0, N = ASTFiles.size(); I != N; ++I) {
43  Diags(new DiagnosticsEngine(DiagIDs, &CI.getDiagnosticOpts(),
45  *CI.getDiagnostics().getClient()),
46  /*ShouldOwnClient=*/true));
47  std::unique_ptr<ASTUnit> Unit = ASTUnit::LoadFromASTFile(
48  ASTFiles[I], CI.getPCHContainerReader(), ASTUnit::LoadEverything, Diags,
49  CI.getFileSystemOpts(), false);
50 
51  if (!Unit)
52  continue;
53 
54  ASTImporter Importer(CI.getASTContext(),
55  CI.getFileManager(),
56  Unit->getASTContext(),
57  Unit->getFileManager(),
58  /*MinimalImport=*/false);
59 
60  TranslationUnitDecl *TU = Unit->getASTContext().getTranslationUnitDecl();
61  for (auto *D : TU->decls()) {
62  // Don't re-import __va_list_tag, __builtin_va_list.
63  if (const auto *ND = dyn_cast<NamedDecl>(D))
64  if (IdentifierInfo *II = ND->getIdentifier())
65  if (II->isStr("__va_list_tag") || II->isStr("__builtin_va_list"))
66  continue;
67 
68  Decl *ToD = Importer.Import(D);
69 
70  if (ToD) {
71  DeclGroupRef DGR(ToD);
73  }
74  }
75  }
76 
77  AdaptedAction->ExecuteAction();
79 }
80 
82  return AdaptedAction->EndSourceFileAction();
83 }
84 
85 ASTMergeAction::ASTMergeAction(std::unique_ptr<FrontendAction> adaptedAction,
86  ArrayRef<std::string> ASTFiles)
87 : AdaptedAction(std::move(adaptedAction)), ASTFiles(ASTFiles.begin(), ASTFiles.end()) {
88  assert(AdaptedAction && "ASTMergeAction needs an action to adapt");
89 }
90 
92 }
93 
95  return AdaptedAction->usesPreprocessorOnly();
96 }
97 
99  return AdaptedAction->getTranslationUnitKind();
100 }
101 
103  return AdaptedAction->hasPCHSupport();
104 }
105 
107  return AdaptedAction->hasASTFileSupport();
108 }
109 
111  return AdaptedAction->hasCodeCompletionSupport();
112 }
Defines the clang::ASTContext interface.
DiagnosticConsumer * getClient()
Definition: Diagnostic.h:427
bool hasPCHSupport() const override
Does this action support use with PCH?
Definition: ASTMerge.cpp:102
Load everything, including Sema.
Definition: ASTUnit.h:637
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:86
DiagnosticOptions & getDiagnosticOpts()
std::unique_ptr< ASTUnit > takeCurrentASTUnit()
static std::unique_ptr< ASTUnit > LoadFromASTFile(const std::string &Filename, const PCHContainerReader &PCHContainerRdr, WhatToLoad ToLoad, IntrusiveRefCntPtr< DiagnosticsEngine > Diags, const FileSystemOptions &FileSystemOpts, bool UseDebugInfo=false, bool OnlyLocalDecls=false, ArrayRef< RemappedFile > RemappedFiles=None, bool CaptureDiagnostics=false, bool AllowPCHWithCompilerErrors=false, bool UserFilesAreVolatile=false)
Create a ASTUnit from an AST file.
Definition: ASTUnit.cpp:683
std::unique_ptr< ASTConsumer > CreateASTConsumer(CompilerInstance &CI, StringRef InFile) override
Create the AST consumer object for this action, if supported.
Definition: ASTMerge.cpp:20
ASTContext & getASTContext() const
virtual void EndSourceFile()
Callback to inform the diagnostic client that processing of a source file has ended.
Definition: Diagnostic.h:1430
bool BeginSourceFileAction(CompilerInstance &CI) override
Callback at the start of processing a single input.
Definition: ASTMerge.cpp:24
One of these records is kept for each identifier that is lexed.
Definition: Format.h:1900
bool usesPreprocessorOnly() const override
Does this action only use the preprocessor?
Definition: ASTMerge.cpp:94
bool hasCodeCompletionSupport() const override
Does this action support use with code completion?
Definition: ASTMerge.cpp:110
CompilerInstance & getCompilerInstance() const
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:147
ASTConsumer & getASTConsumer() const
Defines the Diagnostic-related interfaces.
ASTMergeAction(std::unique_ptr< FrontendAction > AdaptedAction, ArrayRef< std::string > ASTFiles)
Definition: ASTMerge.cpp:85
FileSystemOptions & getFileSystemOpts()
CompilerInstance - Helper class for managing a single instance of the Clang compiler.
~ASTMergeAction() override
Definition: ASTMerge.cpp:91
Diagnostic consumer that forwards diagnostics along to an existing, already-initialized diagnostic co...
Definition: Diagnostic.h:1465
void SetArgToStringFn(ArgToStringFnTy Fn, void *Cookie)
Definition: Diagnostic.h:707
Dataflow Directional Tag Classes.
FileManager & getFileManager() const
Return the current file manager to the caller.
const FrontendInputFile & getCurrentInput() const
bool hasASTFileSupport() const override
Does this action support use with AST files?
Definition: ASTMerge.cpp:106
void FormatASTNodeDiagnosticArgument(DiagnosticsEngine::ArgumentKind Kind, intptr_t Val, StringRef Modifier, StringRef Argument, ArrayRef< DiagnosticsEngine::ArgumentValue > PrevArgs, SmallVectorImpl< char > &Output, void *Cookie, ArrayRef< intptr_t > QualTypeVals)
DiagnosticsEngine argument formatting function for diagnostics that involve AST nodes.
Imports selected nodes from one AST context into another context, merging AST nodes where appropriate...
Definition: ASTImporter.h:40
void EndSourceFileAction() override
Callback at the end of processing a single input.
Definition: ASTMerge.cpp:81
void ExecuteAction() override
Callback to run the program action, using the initialized compiler instance.
Definition: ASTMerge.cpp:33
const IntrusiveRefCntPtr< DiagnosticIDs > & getDiagnosticIDs() const
Definition: Diagnostic.h:412
TranslationUnitKind
Describes the kind of translation unit being processed.
Definition: LangOptions.h:242
const PCHContainerReader & getPCHContainerReader() const
Return the appropriate PCHContainerReader depending on the current CodeGenOptions.
TranslationUnitKind getTranslationUnitKind() override
For AST-based actions, the kind of translation unit we&#39;re handling.
Definition: ASTMerge.cpp:98
DiagnosticsEngine & getDiagnostics() const
Get the current diagnostics engine.
TranslationUnitDecl - The top declaration context.
Definition: Decl.h:107
virtual bool HandleTopLevelDecl(DeclGroupRef D)
HandleTopLevelDecl - Handle the specified top-level declaration.
Definition: ASTConsumer.cpp:19
virtual void BeginSourceFile(const LangOptions &LangOpts, const Preprocessor *PP=nullptr)
Callback to inform the diagnostic client that processing of a source file is beginning.
Definition: Diagnostic.h:1422
const LangOptions & getLangOpts() const
Definition: ASTContext.h:688