clang 8.0.0

CrossTranslationUnit.cpp
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1 //===--- CrossTranslationUnit.cpp - -----------------------------*- 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 implements the CrossTranslationUnit interface.
11 //
12 //===----------------------------------------------------------------------===//
13 #include "clang/CrossTU/CrossTranslationUnit.h"
14 #include "clang/AST/ASTImporter.h"
15 #include "clang/AST/Decl.h"
16 #include "clang/Basic/TargetInfo.h"
17 #include "clang/CrossTU/CrossTUDiagnostic.h"
18 #include "clang/Frontend/ASTUnit.h"
19 #include "clang/Frontend/CompilerInstance.h"
20 #include "clang/Frontend/TextDiagnosticPrinter.h"
21 #include "clang/Index/USRGeneration.h"
22 #include "llvm/ADT/Triple.h"
23 #include "llvm/ADT/Statistic.h"
24 #include "llvm/Support/ErrorHandling.h"
25 #include "llvm/Support/ManagedStatic.h"
26 #include "llvm/Support/Path.h"
27 #include "llvm/Support/raw_ostream.h"
28 #include <fstream>
29 #include <sstream>
30
31 namespace clang {
32 namespace cross_tu {
33
34 namespace {
35
36 #define DEBUG_TYPE "CrossTranslationUnit"
37 STATISTIC(NumGetCTUCalled, "The # of getCTUDefinition function called");
38 STATISTIC(
39 NumNotInOtherTU,
40 "The # of getCTUDefinition called but the function is not in any other TU");
41 STATISTIC(NumGetCTUSuccess,
42 "The # of getCTUDefinition successfully returned the "
43 "requested function's body");
44 STATISTIC(NumTripleMismatch, "The # of triple mismatches");
45 STATISTIC(NumLangMismatch, "The # of language mismatches");
46
47 // Same as Triple's equality operator, but we check a field only if that is
48 // known in both instances.
49 bool hasEqualKnownFields(const llvm::Triple &Lhs, const llvm::Triple &Rhs) {
50 using llvm::Triple;
51 if (Lhs.getArch() != Triple::UnknownArch &&
52 Rhs.getArch() != Triple::UnknownArch && Lhs.getArch() != Rhs.getArch())
53 return false;
54 if (Lhs.getSubArch() != Triple::NoSubArch &&
55 Rhs.getSubArch() != Triple::NoSubArch &&
56 Lhs.getSubArch() != Rhs.getSubArch())
57 return false;
58 if (Lhs.getVendor() != Triple::UnknownVendor &&
59 Rhs.getVendor() != Triple::UnknownVendor &&
60 Lhs.getVendor() != Rhs.getVendor())
61 return false;
62 if (!Lhs.isOSUnknown() && !Rhs.isOSUnknown() &&
63 Lhs.getOS() != Rhs.getOS())
64 return false;
65 if (Lhs.getEnvironment() != Triple::UnknownEnvironment &&
66 Rhs.getEnvironment() != Triple::UnknownEnvironment &&
67 Lhs.getEnvironment() != Rhs.getEnvironment())
68 return false;
69 if (Lhs.getObjectFormat() != Triple::UnknownObjectFormat &&
70 Rhs.getObjectFormat() != Triple::UnknownObjectFormat &&
71 Lhs.getObjectFormat() != Rhs.getObjectFormat())
72 return false;
73 return true;
74 }
75
76 // FIXME: This class is will be removed after the transition to llvm::Error.
77 class IndexErrorCategory : public std::error_category {
78 public:
79 const char *name() const noexcept override { return "clang.index"; }
80
81 std::string message(int Condition) const override {
82 switch (static_cast<index_error_code>(Condition)) {
83 case index_error_code::unspecified:
84 return "An unknown error has occurred.";
85 case index_error_code::missing_index_file:
86 return "The index file is missing.";
87 case index_error_code::invalid_index_format:
88 return "Invalid index file format.";
89 case index_error_code::multiple_definitions:
90 return "Multiple definitions in the index file.";
91 case index_error_code::missing_definition:
92 return "Missing definition from the index file.";
93 case index_error_code::failed_import:
94 return "Failed to import the definition.";
95 case index_error_code::failed_to_get_external_ast:
96 return "Failed to load external AST source.";
97 case index_error_code::failed_to_generate_usr:
98 return "Failed to generate USR.";
99 case index_error_code::triple_mismatch:
100 return "Triple mismatch";
101 case index_error_code::lang_mismatch:
102 return "Language mismatch";
103 }
104 llvm_unreachable("Unrecognized index_error_code.");
105 }
106 };
107
108 static llvm::ManagedStatic<IndexErrorCategory> Category;
109 } // end anonymous namespace
110
111 char IndexError::ID;
112
113 void IndexError::log(raw_ostream &OS) const {
114 OS << Category->message(static_cast<int>(Code)) << '\n';
115 }
116
117 std::error_code IndexError::convertToErrorCode() const {
118 return std::error_code(static_cast<int>(Code), *Category);
119 }
120
121 llvm::Expected<llvm::StringMap<std::string>>
122 parseCrossTUIndex(StringRef IndexPath, StringRef CrossTUDir) {
123 std::ifstream ExternalMapFile(IndexPath);
124 if (!ExternalMapFile)
125 return llvm::make_error<IndexError>(index_error_code::missing_index_file,
126 IndexPath.str());
127
128 llvm::StringMap<std::string> Result;
129 std::string Line;
130 unsigned LineNo = 1;
131 while (std::getline(ExternalMapFile, Line)) {
132 const size_t Pos = Line.find(" ");
133 if (Pos > 0 && Pos != std::string::npos) {
134 StringRef LineRef{Line};
135 StringRef LookupName = LineRef.substr(0, Pos);
136 if (Result.count(LookupName))
137 return llvm::make_error<IndexError>(
138 index_error_code::multiple_definitions, IndexPath.str(), LineNo);
139 StringRef FileName = LineRef.substr(Pos + 1);
140 SmallString<256> FilePath = CrossTUDir;
141 llvm::sys::path::append(FilePath, FileName);
142 Result[LookupName] = FilePath.str().str();
143 } else
144 return llvm::make_error<IndexError>(
145 index_error_code::invalid_index_format, IndexPath.str(), LineNo);
146 LineNo++;
147 }
148 return Result;
149 }
150
151 std::string
152 createCrossTUIndexString(const llvm::StringMap<std::string> &Index) {
153 std::ostringstream Result;
154 for (const auto &E : Index)
155 Result << E.getKey().str() << " " << E.getValue() << '\n';
156 return Result.str();
157 }
158
159 CrossTranslationUnitContext::CrossTranslationUnitContext(CompilerInstance &CI)
160 : CI(CI), Context(CI.getASTContext()) {}
161
162 CrossTranslationUnitContext::~CrossTranslationUnitContext() {}
163
164 std::string CrossTranslationUnitContext::getLookupName(const NamedDecl *ND) {
165 SmallString<128> DeclUSR;
166 bool Ret = index::generateUSRForDecl(ND, DeclUSR); (void)Ret;
167 assert(!Ret && "Unable to generate USR");
168 return DeclUSR.str();
169 }
170
171 /// Recursively visits the function decls of a DeclContext, and looks up a
172 /// function based on USRs.
173 const FunctionDecl *
174 CrossTranslationUnitContext::findFunctionInDeclContext(const DeclContext *DC,
175 StringRef LookupFnName) {
176 assert(DC && "Declaration Context must not be null");
177 for (const Decl *D : DC->decls()) {
178 const auto *SubDC = dyn_cast<DeclContext>(D);
179 if (SubDC)
180 if (const auto *FD = findFunctionInDeclContext(SubDC, LookupFnName))
181 return FD;
182
183 const auto *ND = dyn_cast<FunctionDecl>(D);
184 const FunctionDecl *ResultDecl;
185 if (!ND || !ND->hasBody(ResultDecl))
186 continue;
187 if (getLookupName(ResultDecl) != LookupFnName)
188 continue;
189 return ResultDecl;
190 }
191 return nullptr;
192 }
193
194 llvm::Expected<const FunctionDecl *>
195 CrossTranslationUnitContext::getCrossTUDefinition(const FunctionDecl *FD,
196 StringRef CrossTUDir,
197 StringRef IndexName,
198 bool DisplayCTUProgress) {
199 assert(FD && "FD is missing, bad call to this function!");
200 assert(!FD->hasBody() && "FD has a definition in current translation unit!");
201 ++NumGetCTUCalled;
202 const std::string LookupFnName = getLookupName(FD);
203 if (LookupFnName.empty())
204 return llvm::make_error<IndexError>(
205 index_error_code::failed_to_generate_usr);
206 llvm::Expected<ASTUnit *> ASTUnitOrError =
207 loadExternalAST(LookupFnName, CrossTUDir, IndexName, DisplayCTUProgress);
208 if (!ASTUnitOrError)
209 return ASTUnitOrError.takeError();
210 ASTUnit *Unit = *ASTUnitOrError;
211 assert(&Unit->getFileManager() ==
212 &Unit->getASTContext().getSourceManager().getFileManager());
213
214 const llvm::Triple &TripleTo = Context.getTargetInfo().getTriple();
215 const llvm::Triple &TripleFrom =
216 Unit->getASTContext().getTargetInfo().getTriple();
217 // The imported AST had been generated for a different target.
218 // Some parts of the triple in the loaded ASTContext can be unknown while the
219 // very same parts in the target ASTContext are known. Thus we check for the
220 // known parts only.
221 if (!hasEqualKnownFields(TripleTo, TripleFrom)) {
222 // TODO: Pass the SourceLocation of the CallExpression for more precise
223 // diagnostics.
224 ++NumTripleMismatch;
225 return llvm::make_error<IndexError>(index_error_code::triple_mismatch,
226 Unit->getMainFileName(), TripleTo.str(),
227 TripleFrom.str());
228 }
229
230 const auto &LangTo = Context.getLangOpts();
231 const auto &LangFrom = Unit->getASTContext().getLangOpts();
232 // FIXME: Currenty we do not support CTU across C++ and C and across
233 // different dialects of C++.
234 if (LangTo.CPlusPlus != LangFrom.CPlusPlus) {
235 ++NumLangMismatch;
236 return llvm::make_error<IndexError>(index_error_code::lang_mismatch);
237 }
238
239 TranslationUnitDecl *TU = Unit->getASTContext().getTranslationUnitDecl();
240 if (const FunctionDecl *ResultDecl =
241 findFunctionInDeclContext(TU, LookupFnName))
242 return importDefinition(ResultDecl);
243 return llvm::make_error<IndexError>(index_error_code::failed_import);
244 }
245
246 void CrossTranslationUnitContext::emitCrossTUDiagnostics(const IndexError &IE) {
247 switch (IE.getCode()) {
248 case index_error_code::missing_index_file:
249 Context.getDiagnostics().Report(diag::err_ctu_error_opening)
250 << IE.getFileName();
251 break;
252 case index_error_code::invalid_index_format:
253 Context.getDiagnostics().Report(diag::err_extdefmap_parsing)
254 << IE.getFileName() << IE.getLineNum();
255 break;
256 case index_error_code::multiple_definitions:
257 Context.getDiagnostics().Report(diag::err_multiple_def_index)
258 << IE.getLineNum();
259 break;
260 case index_error_code::triple_mismatch:
261 Context.getDiagnostics().Report(diag::warn_ctu_incompat_triple)
262 << IE.getFileName() << IE.getTripleToName() << IE.getTripleFromName();
263 break;
264 default:
265 break;
266 }
267 }
268
269 llvm::Expected<ASTUnit *> CrossTranslationUnitContext::loadExternalAST(
270 StringRef LookupName, StringRef CrossTUDir, StringRef IndexName,
271 bool DisplayCTUProgress) {
272 // FIXME: The current implementation only supports loading functions with
273 // a lookup name from a single translation unit. If multiple
274 // translation units contains functions with the same lookup name an
275 // error will be returned.
276 ASTUnit *Unit = nullptr;
277 auto FnUnitCacheEntry = FunctionASTUnitMap.find(LookupName);
278 if (FnUnitCacheEntry == FunctionASTUnitMap.end()) {
279 if (FunctionFileMap.empty()) {
280 SmallString<256> IndexFile = CrossTUDir;
281 if (llvm::sys::path::is_absolute(IndexName))
282 IndexFile = IndexName;
283 else
284 llvm::sys::path::append(IndexFile, IndexName);
285 llvm::Expected<llvm::StringMap<std::string>> IndexOrErr =
286 parseCrossTUIndex(IndexFile, CrossTUDir);
287 if (IndexOrErr)
288 FunctionFileMap = *IndexOrErr;
289 else
290 return IndexOrErr.takeError();
291 }
292
293 auto It = FunctionFileMap.find(LookupName);
294 if (It == FunctionFileMap.end()) {
295 ++NumNotInOtherTU;
296 return llvm::make_error<IndexError>(index_error_code::missing_definition);
297 }
298 StringRef ASTFileName = It->second;
299 auto ASTCacheEntry = FileASTUnitMap.find(ASTFileName);
300 if (ASTCacheEntry == FileASTUnitMap.end()) {
301 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
302 TextDiagnosticPrinter *DiagClient =
303 new TextDiagnosticPrinter(llvm::errs(), &*DiagOpts);
304 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
305 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
306 new DiagnosticsEngine(DiagID, &*DiagOpts, DiagClient));
307
308 std::unique_ptr<ASTUnit> LoadedUnit(ASTUnit::LoadFromASTFile(
309 ASTFileName, CI.getPCHContainerOperations()->getRawReader(),
310 ASTUnit::LoadEverything, Diags, CI.getFileSystemOpts()));
311 Unit = LoadedUnit.get();
312 FileASTUnitMap[ASTFileName] = std::move(LoadedUnit);
313 if (DisplayCTUProgress) {
314 llvm::errs() << "CTU loaded AST file: "
315 << ASTFileName << "\n";
316 }
317 } else {
318 Unit = ASTCacheEntry->second.get();
319 }
320 FunctionASTUnitMap[LookupName] = Unit;
321 } else {
322 Unit = FnUnitCacheEntry->second;
323 }
324 if (!Unit)
325 return llvm::make_error<IndexError>(
326 index_error_code::failed_to_get_external_ast);
327 return Unit;
328 }
329
330 llvm::Expected<const FunctionDecl *>
331 CrossTranslationUnitContext::importDefinition(const FunctionDecl *FD) {
332 assert(FD->hasBody() && "Functions to be imported should have body.");
333
334 ASTImporter &Importer = getOrCreateASTImporter(FD->getASTContext());
335 auto *ToDecl =
336 cast_or_null<FunctionDecl>(Importer.Import(const_cast<FunctionDecl *>(FD)));
337 if (!ToDecl)
338 return llvm::make_error<IndexError>(index_error_code::failed_import);
339 assert(ToDecl->hasBody());
340 assert(FD->hasBody() && "Functions already imported should have body.");
341 ++NumGetCTUSuccess;
342 return ToDecl;
343 }
344
345 void CrossTranslationUnitContext::lazyInitLookupTable(
346 TranslationUnitDecl *ToTU) {
347 if (!LookupTable)
348 LookupTable = llvm::make_unique<ASTImporterLookupTable>(*ToTU);
349 }
350
351 ASTImporter &
352 CrossTranslationUnitContext::getOrCreateASTImporter(ASTContext &From) {
353 auto I = ASTUnitImporterMap.find(From.getTranslationUnitDecl());
354 if (I != ASTUnitImporterMap.end())
355 return *I->second;
356 lazyInitLookupTable(Context.getTranslationUnitDecl());
357 ASTImporter *NewImporter = new ASTImporter(
358 Context, Context.getSourceManager().getFileManager(), From,
359 From.getSourceManager().getFileManager(), false, LookupTable.get());
360 ASTUnitImporterMap[From.getTranslationUnitDecl()].reset(NewImporter);
361 return *NewImporter;
362 }
363
364 } // namespace cross_tu
365 } // namespace clang
CrossTranslationUnit.h
clang::FunctionDecl
Represents a function declaration or definition.
Definition: Decl.h:1738
clang::cross_tu::index_error_code::unspecified
clang::cross_tu::CrossTranslationUnitContext::CrossTranslationUnitContext
CrossTranslationUnitContext(CompilerInstance &CI)
Definition: CrossTranslationUnit.cpp:159
clang::TargetInfo::getTriple
const llvm::Triple & getTriple() const
Returns the target triple of the primary target.
Definition: TargetInfo.h:953
clang::ASTUnit::LoadEverything
Load everything, including Sema.
Definition: ASTUnit.h:671
clang::CompilerInstance::getPCHContainerOperations
std::shared_ptr< PCHContainerOperations > getPCHContainerOperations() const
Definition: CompilerInstance.h:529
clang::Decl
Decl - This represents one declaration (or definition), e.g.
Definition: DeclBase.h:87
clang::ASTUnit::getFileManager
const FileManager & getFileManager() const
Definition: ASTUnit.h:471
clang::cross_tu::CrossTranslationUnitContext::loadExternalAST
llvm::Expected< ASTUnit * > loadExternalAST(StringRef LookupName, StringRef CrossTUDir, StringRef IndexName, bool DisplayCTUProgress=false)
This function loads a function definition from an external AST file.
Definition: CrossTranslationUnit.cpp:269
clang::cross_tu::IndexError::log
void log(raw_ostream &OS) const override
Definition: CrossTranslationUnit.cpp:113
clang::ASTContext::getDiagnostics
DiagnosticsEngine & getDiagnostics() const
Definition: ASTContext.cpp:1335
clang::DiagnosticsEngine::Report
DiagnosticBuilder Report(SourceLocation Loc, unsigned DiagID)
Issue the message to the client.
Definition: Diagnostic.h:1295
clang::ASTContext::getTargetInfo
const TargetInfo & getTargetInfo() const
Definition: ASTContext.h:690
clang::ASTUnit::LoadFromASTFile
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:733
clang::cross_tu::index_error_code::missing_definition
clang::DeclContext::decls
decl_range decls() const
decls_begin/decls_end - Iterate over the declarations stored in this context.
Definition: DeclBase.h:1997
clang::SourceManager::getFileManager
FileManager & getFileManager() const
Definition: SourceManager.h:759
clang::ASTContext
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:155
clang::ASTUnit
Utility class for loading a ASTContext from an AST file.
Definition: ASTUnit.h:87
Category
int Category
Definition: Format.cpp:1632
clang::ASTUnit::getMainFileName
StringRef getMainFileName() const
Definition: ASTUnit.cpp:1439
llvm::Expected
Definition: LLVM.h:39
clang::DiagnosticsEngine
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:149
clang::cross_tu::index_error_code::lang_mismatch
clang::cross_tu::index_error_code::invalid_index_format
llvm::SmallString
Definition: LLVM.h:35
clang::cross_tu::index_error_code::failed_to_generate_usr
CompilerInstance.h
STATISTIC
STATISTIC(NumObjCCallEdges, "Number of Objective-C method call edges")
Line
const AnnotatedLine * Line
Definition: UsingDeclarationsSorter.cpp:69
clang::cross_tu::createCrossTUIndexString
std::string createCrossTUIndexString(const llvm::StringMap< std::string > &Index)
Definition: CrossTranslationUnit.cpp:152
clang::cross_tu::index_error_code::multiple_definitions
clang::FunctionDecl::hasBody
bool hasBody(const FunctionDecl *&Definition) const
Returns true if the function has a body.
Definition: Decl.cpp:2695
clang::cross_tu::IndexError::getFileName
std::string getFileName() const
Definition: CrossTranslationUnit.h:65
clang::cross_tu::parseCrossTUIndex
llvm::Expected< llvm::StringMap< std::string > > parseCrossTUIndex(StringRef IndexPath, StringRef CrossTUDir)
This function parses an index file that determines which translation unit contains which definition...
Definition: CrossTranslationUnit.cpp:122
clang::cross_tu::CrossTranslationUnitContext::~CrossTranslationUnitContext
~CrossTranslationUnitContext()
Definition: CrossTranslationUnit.cpp:162
clang::cross_tu::index_error_code::failed_import
clang::CompilerInstance::getFileSystemOpts
FileSystemOptions & getFileSystemOpts()
Definition: CompilerInstance.h:286
llvm::IntrusiveRefCntPtr
Definition: LLVM.h:45
clang::CompilerInstance
CompilerInstance - Helper class for managing a single instance of the Clang compiler.
Definition: CompilerInstance.h:73
USRGeneration.h
clang::DiagnosticOptions
Options for controlling the compiler diagnostics engine.
Definition: DiagnosticOptions.h:64
clang::Decl::getASTContext
ASTContext & getASTContext() const LLVM_READONLY
Definition: DeclBase.cpp:376
Decl.h
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:22
clang::DeclContext
DeclContext - This is used only as base class of specific decl types that can act as declaration cont...
Definition: DeclBase.h:1262
CrossTUDiagnostic.h
clang::TextDiagnosticPrinter
Definition: TextDiagnosticPrinter.h:28
clang::DiagnosticIDs
Used for handling and querying diagnostic IDs.
Definition: DiagnosticIDs.h:164
TextDiagnosticPrinter.h
ASTImporter.h
ASTUnit.h
clang::cross_tu::IndexError::getCode
index_error_code getCode() const
Definition: CrossTranslationUnit.h:63
clang::ASTImporter
Imports selected nodes from one AST context into another context, merging AST nodes where appropriate...
Definition: ASTImporter.h:83
clang::cross_tu::IndexError
Definition: CrossTranslationUnit.h:50
clang::cross_tu::index_error_code::missing_index_file
clang::cross_tu::CrossTranslationUnitContext::importDefinition
llvm::Expected< const FunctionDecl * > importDefinition(const FunctionDecl *FD)
This function merges a definition from a separate AST Unit into the current one which was created by ...
Definition: CrossTranslationUnit.cpp:331
clang::cross_tu::index_error_code::triple_mismatch
clang::ASTUnit::getASTContext
const ASTContext & getASTContext() const
Definition: ASTUnit.h:434
clang::cross_tu::IndexError::ID
static char ID
Definition: CrossTranslationUnit.h:52
clang::ASTContext::getSourceManager
SourceManager & getSourceManager()
Definition: ASTContext.h:662
clang::cross_tu::CrossTranslationUnitContext::getCrossTUDefinition
llvm::Expected< const FunctionDecl * > getCrossTUDefinition(const FunctionDecl *FD, StringRef CrossTUDir, StringRef IndexName, bool DisplayCTUProgress=false)
This function loads a function definition from an external AST file and merge it into the original AS...
Definition: CrossTranslationUnit.cpp:195
clang::cross_tu::IndexError::convertToErrorCode
std::error_code convertToErrorCode() const override
Definition: CrossTranslationUnit.cpp:117
clang::ASTContext::getTranslationUnitDecl
TranslationUnitDecl * getTranslationUnitDecl() const
Definition: ASTContext.h:1009
clang::cross_tu::IndexError::getLineNum
int getLineNum() const
Definition: CrossTranslationUnit.h:64
TargetInfo.h
Defines the clang::TargetInfo interface.
clang::cross_tu::CrossTranslationUnitContext::getLookupName
static std::string getLookupName(const NamedDecl *ND)
Get a name to identify a function.
Definition: CrossTranslationUnit.cpp:164
clang::cross_tu::CrossTranslationUnitContext::emitCrossTUDiagnostics
void emitCrossTUDiagnostics(const IndexError &IE)
Emit diagnostics for the user for potential configuration errors.
Definition: CrossTranslationUnit.cpp:246
clang::TranslationUnitDecl
The top declaration context.
Definition: Decl.h:108
clang::index::generateUSRForDecl
bool generateUSRForDecl(const Decl *D, SmallVectorImpl< char > &Buf)
Generate a USR for a Decl, including the USR prefix.
Definition: USRGeneration.cpp:1065
clang::NamedDecl
This represents a decl that may have a name.
Definition: Decl.h:249
clang::cross_tu::IndexError::getTripleToName
std::string getTripleToName() const
Definition: CrossTranslationUnit.h:66
clang::cross_tu::index_error_code::failed_to_get_external_ast
clang::ASTContext::getLangOpts
const LangOptions & getLangOpts() const
Definition: ASTContext.h:707
clang::cross_tu::IndexError::getTripleFromName
std::string getTripleFromName() const
Definition: CrossTranslationUnit.h:67