clang  6.0.0svn
Preprocessor.cpp
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1 //===- Preprocess.cpp - C Language Family Preprocessor Implementation -----===//
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 Preprocessor interface.
11 //
12 //===----------------------------------------------------------------------===//
13 //
14 // Options to support:
15 // -H - Print the name of each header file used.
16 // -d[DNI] - Dump various things.
17 // -fworking-directory - #line's with preprocessor's working dir.
18 // -fpreprocessed
19 // -dependency-file,-M,-MM,-MF,-MG,-MP,-MT,-MQ,-MD,-MMD
20 // -W*
21 // -w
22 //
23 // Messages to emit:
24 // "Multiple include guards may be useful for:\n"
25 //
26 //===----------------------------------------------------------------------===//
27 
28 #include "clang/Lex/Preprocessor.h"
32 #include "clang/Basic/LLVM.h"
34 #include "clang/Basic/Module.h"
37 #include "clang/Basic/TargetInfo.h"
40 #include "clang/Lex/HeaderSearch.h"
42 #include "clang/Lex/Lexer.h"
44 #include "clang/Lex/MacroArgs.h"
45 #include "clang/Lex/MacroInfo.h"
46 #include "clang/Lex/ModuleLoader.h"
47 #include "clang/Lex/PTHLexer.h"
48 #include "clang/Lex/PTHManager.h"
49 #include "clang/Lex/Pragma.h"
54 #include "clang/Lex/Token.h"
55 #include "clang/Lex/TokenLexer.h"
56 #include "llvm/ADT/APInt.h"
57 #include "llvm/ADT/ArrayRef.h"
58 #include "llvm/ADT/DenseMap.h"
59 #include "llvm/ADT/SmallString.h"
60 #include "llvm/ADT/SmallVector.h"
61 #include "llvm/ADT/STLExtras.h"
62 #include "llvm/ADT/StringRef.h"
63 #include "llvm/ADT/StringSwitch.h"
64 #include "llvm/Support/Capacity.h"
65 #include "llvm/Support/ErrorHandling.h"
66 #include "llvm/Support/MemoryBuffer.h"
67 #include "llvm/Support/raw_ostream.h"
68 #include <algorithm>
69 #include <cassert>
70 #include <memory>
71 #include <string>
72 #include <utility>
73 #include <vector>
74 
75 using namespace clang;
76 
77 LLVM_INSTANTIATE_REGISTRY(PragmaHandlerRegistry)
78 
80 
81 Preprocessor::Preprocessor(std::shared_ptr<PreprocessorOptions> PPOpts,
82  DiagnosticsEngine &diags, LangOptions &opts,
84  HeaderSearch &Headers, ModuleLoader &TheModuleLoader,
85  IdentifierInfoLookup *IILookup, bool OwnsHeaders,
86  TranslationUnitKind TUKind)
87  : PPOpts(std::move(PPOpts)), Diags(&diags), LangOpts(opts),
88  FileMgr(Headers.getFileMgr()), SourceMgr(SM),
89  PCMCache(PCMCache), ScratchBuf(new ScratchBuffer(SourceMgr)),
90  HeaderInfo(Headers), TheModuleLoader(TheModuleLoader),
91  ExternalSource(nullptr), Identifiers(opts, IILookup),
92  PragmaHandlers(new PragmaNamespace(StringRef())), TUKind(TUKind),
93  SkipMainFilePreamble(0, true),
94  CurSubmoduleState(&NullSubmoduleState) {
95  OwnsHeaderSearch = OwnsHeaders;
96 
97  // Default to discarding comments.
98  KeepComments = false;
99  KeepMacroComments = false;
100  SuppressIncludeNotFoundError = false;
101 
102  // Macro expansion is enabled.
103  DisableMacroExpansion = false;
104  MacroExpansionInDirectivesOverride = false;
105  InMacroArgs = false;
106  InMacroArgPreExpansion = false;
107  NumCachedTokenLexers = 0;
108  PragmasEnabled = true;
109  ParsingIfOrElifDirective = false;
110  PreprocessedOutput = false;
111 
112  // We haven't read anything from the external source.
113  ReadMacrosFromExternalSource = false;
114 
115  // "Poison" __VA_ARGS__, __VA_OPT__ which can only appear in the expansion of
116  // a macro. They get unpoisoned where it is allowed.
117  (Ident__VA_ARGS__ = getIdentifierInfo("__VA_ARGS__"))->setIsPoisoned();
118  SetPoisonReason(Ident__VA_ARGS__,diag::ext_pp_bad_vaargs_use);
119  if (getLangOpts().CPlusPlus2a) {
120  (Ident__VA_OPT__ = getIdentifierInfo("__VA_OPT__"))->setIsPoisoned();
121  SetPoisonReason(Ident__VA_OPT__,diag::ext_pp_bad_vaopt_use);
122  } else {
123  Ident__VA_OPT__ = nullptr;
124  }
125 
126  // Initialize the pragma handlers.
127  RegisterBuiltinPragmas();
128 
129  // Initialize builtin macros like __LINE__ and friends.
130  RegisterBuiltinMacros();
131 
132  if(LangOpts.Borland) {
133  Ident__exception_info = getIdentifierInfo("_exception_info");
134  Ident___exception_info = getIdentifierInfo("__exception_info");
135  Ident_GetExceptionInfo = getIdentifierInfo("GetExceptionInformation");
136  Ident__exception_code = getIdentifierInfo("_exception_code");
137  Ident___exception_code = getIdentifierInfo("__exception_code");
138  Ident_GetExceptionCode = getIdentifierInfo("GetExceptionCode");
139  Ident__abnormal_termination = getIdentifierInfo("_abnormal_termination");
140  Ident___abnormal_termination = getIdentifierInfo("__abnormal_termination");
141  Ident_AbnormalTermination = getIdentifierInfo("AbnormalTermination");
142  } else {
143  Ident__exception_info = Ident__exception_code = nullptr;
144  Ident__abnormal_termination = Ident___exception_info = nullptr;
145  Ident___exception_code = Ident___abnormal_termination = nullptr;
146  Ident_GetExceptionInfo = Ident_GetExceptionCode = nullptr;
147  Ident_AbnormalTermination = nullptr;
148  }
149 
150  if (this->PPOpts->GeneratePreamble)
151  PreambleConditionalStack.startRecording();
152 }
153 
155  assert(BacktrackPositions.empty() && "EnableBacktrack/Backtrack imbalance!");
156 
157  IncludeMacroStack.clear();
158 
159  // Destroy any macro definitions.
160  while (MacroInfoChain *I = MIChainHead) {
161  MIChainHead = I->Next;
162  I->~MacroInfoChain();
163  }
164 
165  // Free any cached macro expanders.
166  // This populates MacroArgCache, so all TokenLexers need to be destroyed
167  // before the code below that frees up the MacroArgCache list.
168  std::fill(TokenLexerCache, TokenLexerCache + NumCachedTokenLexers, nullptr);
169  CurTokenLexer.reset();
170 
171  // Free any cached MacroArgs.
172  for (MacroArgs *ArgList = MacroArgCache; ArgList;)
173  ArgList = ArgList->deallocate();
174 
175  // Delete the header search info, if we own it.
176  if (OwnsHeaderSearch)
177  delete &HeaderInfo;
178 }
179 
181  const TargetInfo *AuxTarget) {
182  assert((!this->Target || this->Target == &Target) &&
183  "Invalid override of target information");
184  this->Target = &Target;
185 
186  assert((!this->AuxTarget || this->AuxTarget == AuxTarget) &&
187  "Invalid override of aux target information.");
188  this->AuxTarget = AuxTarget;
189 
190  // Initialize information about built-ins.
191  BuiltinInfo.InitializeTarget(Target, AuxTarget);
192  HeaderInfo.setTarget(Target);
193 }
194 
196  NumEnteredSourceFiles = 0;
197 
198  // Reset pragmas
199  PragmaHandlersBackup = std::move(PragmaHandlers);
200  PragmaHandlers = llvm::make_unique<PragmaNamespace>(StringRef());
201  RegisterBuiltinPragmas();
202 
203  // Reset PredefinesFileID
204  PredefinesFileID = FileID();
205 }
206 
208  NumEnteredSourceFiles = 1;
209 
210  PragmaHandlers = std::move(PragmaHandlersBackup);
211 }
212 
214  PTH.reset(pm);
215  FileMgr.addStatCache(PTH->createStatCache());
216 }
217 
218 void Preprocessor::DumpToken(const Token &Tok, bool DumpFlags) const {
219  llvm::errs() << tok::getTokenName(Tok.getKind()) << " '"
220  << getSpelling(Tok) << "'";
221 
222  if (!DumpFlags) return;
223 
224  llvm::errs() << "\t";
225  if (Tok.isAtStartOfLine())
226  llvm::errs() << " [StartOfLine]";
227  if (Tok.hasLeadingSpace())
228  llvm::errs() << " [LeadingSpace]";
229  if (Tok.isExpandDisabled())
230  llvm::errs() << " [ExpandDisabled]";
231  if (Tok.needsCleaning()) {
232  const char *Start = SourceMgr.getCharacterData(Tok.getLocation());
233  llvm::errs() << " [UnClean='" << StringRef(Start, Tok.getLength())
234  << "']";
235  }
236 
237  llvm::errs() << "\tLoc=<";
238  DumpLocation(Tok.getLocation());
239  llvm::errs() << ">";
240 }
241 
243  Loc.dump(SourceMgr);
244 }
245 
246 void Preprocessor::DumpMacro(const MacroInfo &MI) const {
247  llvm::errs() << "MACRO: ";
248  for (unsigned i = 0, e = MI.getNumTokens(); i != e; ++i) {
250  llvm::errs() << " ";
251  }
252  llvm::errs() << "\n";
253 }
254 
256  llvm::errs() << "\n*** Preprocessor Stats:\n";
257  llvm::errs() << NumDirectives << " directives found:\n";
258  llvm::errs() << " " << NumDefined << " #define.\n";
259  llvm::errs() << " " << NumUndefined << " #undef.\n";
260  llvm::errs() << " #include/#include_next/#import:\n";
261  llvm::errs() << " " << NumEnteredSourceFiles << " source files entered.\n";
262  llvm::errs() << " " << MaxIncludeStackDepth << " max include stack depth\n";
263  llvm::errs() << " " << NumIf << " #if/#ifndef/#ifdef.\n";
264  llvm::errs() << " " << NumElse << " #else/#elif.\n";
265  llvm::errs() << " " << NumEndif << " #endif.\n";
266  llvm::errs() << " " << NumPragma << " #pragma.\n";
267  llvm::errs() << NumSkipped << " #if/#ifndef#ifdef regions skipped\n";
268 
269  llvm::errs() << NumMacroExpanded << "/" << NumFnMacroExpanded << "/"
270  << NumBuiltinMacroExpanded << " obj/fn/builtin macros expanded, "
271  << NumFastMacroExpanded << " on the fast path.\n";
272  llvm::errs() << (NumFastTokenPaste+NumTokenPaste)
273  << " token paste (##) operations performed, "
274  << NumFastTokenPaste << " on the fast path.\n";
275 
276  llvm::errs() << "\nPreprocessor Memory: " << getTotalMemory() << "B total";
277 
278  llvm::errs() << "\n BumpPtr: " << BP.getTotalMemory();
279  llvm::errs() << "\n Macro Expanded Tokens: "
280  << llvm::capacity_in_bytes(MacroExpandedTokens);
281  llvm::errs() << "\n Predefines Buffer: " << Predefines.capacity();
282  // FIXME: List information for all submodules.
283  llvm::errs() << "\n Macros: "
284  << llvm::capacity_in_bytes(CurSubmoduleState->Macros);
285  llvm::errs() << "\n #pragma push_macro Info: "
286  << llvm::capacity_in_bytes(PragmaPushMacroInfo);
287  llvm::errs() << "\n Poison Reasons: "
288  << llvm::capacity_in_bytes(PoisonReasons);
289  llvm::errs() << "\n Comment Handlers: "
290  << llvm::capacity_in_bytes(CommentHandlers) << "\n";
291 }
292 
294 Preprocessor::macro_begin(bool IncludeExternalMacros) const {
295  if (IncludeExternalMacros && ExternalSource &&
296  !ReadMacrosFromExternalSource) {
297  ReadMacrosFromExternalSource = true;
298  ExternalSource->ReadDefinedMacros();
299  }
300 
301  // Make sure we cover all macros in visible modules.
302  for (const ModuleMacro &Macro : ModuleMacros)
303  CurSubmoduleState->Macros.insert(std::make_pair(Macro.II, MacroState()));
304 
305  return CurSubmoduleState->Macros.begin();
306 }
307 
309  return BP.getTotalMemory()
310  + llvm::capacity_in_bytes(MacroExpandedTokens)
311  + Predefines.capacity() /* Predefines buffer. */
312  // FIXME: Include sizes from all submodules, and include MacroInfo sizes,
313  // and ModuleMacros.
314  + llvm::capacity_in_bytes(CurSubmoduleState->Macros)
315  + llvm::capacity_in_bytes(PragmaPushMacroInfo)
316  + llvm::capacity_in_bytes(PoisonReasons)
317  + llvm::capacity_in_bytes(CommentHandlers);
318 }
319 
321 Preprocessor::macro_end(bool IncludeExternalMacros) const {
322  if (IncludeExternalMacros && ExternalSource &&
323  !ReadMacrosFromExternalSource) {
324  ReadMacrosFromExternalSource = true;
325  ExternalSource->ReadDefinedMacros();
326  }
327 
328  return CurSubmoduleState->Macros.end();
329 }
330 
331 /// \brief Compares macro tokens with a specified token value sequence.
332 static bool MacroDefinitionEquals(const MacroInfo *MI,
333  ArrayRef<TokenValue> Tokens) {
334  return Tokens.size() == MI->getNumTokens() &&
335  std::equal(Tokens.begin(), Tokens.end(), MI->tokens_begin());
336 }
337 
339  SourceLocation Loc,
340  ArrayRef<TokenValue> Tokens) const {
341  SourceLocation BestLocation;
342  StringRef BestSpelling;
344  I != E; ++I) {
346  Def = I->second.findDirectiveAtLoc(Loc, SourceMgr);
347  if (!Def || !Def.getMacroInfo())
348  continue;
349  if (!Def.getMacroInfo()->isObjectLike())
350  continue;
351  if (!MacroDefinitionEquals(Def.getMacroInfo(), Tokens))
352  continue;
353  SourceLocation Location = Def.getLocation();
354  // Choose the macro defined latest.
355  if (BestLocation.isInvalid() ||
356  (Location.isValid() &&
357  SourceMgr.isBeforeInTranslationUnit(BestLocation, Location))) {
358  BestLocation = Location;
359  BestSpelling = I->first->getName();
360  }
361  }
362  return BestSpelling;
363 }
364 
366  if (CurLexer)
367  CurLexerKind = CLK_Lexer;
368  else if (CurPTHLexer)
369  CurLexerKind = CLK_PTHLexer;
370  else if (CurTokenLexer)
371  CurLexerKind = CLK_TokenLexer;
372  else
373  CurLexerKind = CLK_CachingLexer;
374 }
375 
377  unsigned CompleteLine,
378  unsigned CompleteColumn) {
379  assert(File);
380  assert(CompleteLine && CompleteColumn && "Starts from 1:1");
381  assert(!CodeCompletionFile && "Already set");
382 
383  using llvm::MemoryBuffer;
384 
385  // Load the actual file's contents.
386  bool Invalid = false;
387  const MemoryBuffer *Buffer = SourceMgr.getMemoryBufferForFile(File, &Invalid);
388  if (Invalid)
389  return true;
390 
391  // Find the byte position of the truncation point.
392  const char *Position = Buffer->getBufferStart();
393  for (unsigned Line = 1; Line < CompleteLine; ++Line) {
394  for (; *Position; ++Position) {
395  if (*Position != '\r' && *Position != '\n')
396  continue;
397 
398  // Eat \r\n or \n\r as a single line.
399  if ((Position[1] == '\r' || Position[1] == '\n') &&
400  Position[0] != Position[1])
401  ++Position;
402  ++Position;
403  break;
404  }
405  }
406 
407  Position += CompleteColumn - 1;
408 
409  // If pointing inside the preamble, adjust the position at the beginning of
410  // the file after the preamble.
411  if (SkipMainFilePreamble.first &&
412  SourceMgr.getFileEntryForID(SourceMgr.getMainFileID()) == File) {
413  if (Position - Buffer->getBufferStart() < SkipMainFilePreamble.first)
414  Position = Buffer->getBufferStart() + SkipMainFilePreamble.first;
415  }
416 
417  if (Position > Buffer->getBufferEnd())
418  Position = Buffer->getBufferEnd();
419 
420  CodeCompletionFile = File;
421  CodeCompletionOffset = Position - Buffer->getBufferStart();
422 
423  std::unique_ptr<MemoryBuffer> NewBuffer =
424  MemoryBuffer::getNewUninitMemBuffer(Buffer->getBufferSize() + 1,
425  Buffer->getBufferIdentifier());
426  char *NewBuf = const_cast<char*>(NewBuffer->getBufferStart());
427  char *NewPos = std::copy(Buffer->getBufferStart(), Position, NewBuf);
428  *NewPos = '\0';
429  std::copy(Position, Buffer->getBufferEnd(), NewPos+1);
430  SourceMgr.overrideFileContents(File, std::move(NewBuffer));
431 
432  return false;
433 }
434 
436  if (CodeComplete)
437  CodeComplete->CodeCompleteNaturalLanguage();
439 }
440 
441 /// getSpelling - This method is used to get the spelling of a token into a
442 /// SmallVector. Note that the returned StringRef may not point to the
443 /// supplied buffer if a copy can be avoided.
445  SmallVectorImpl<char> &Buffer,
446  bool *Invalid) const {
447  // NOTE: this has to be checked *before* testing for an IdentifierInfo.
448  if (Tok.isNot(tok::raw_identifier) && !Tok.hasUCN()) {
449  // Try the fast path.
450  if (const IdentifierInfo *II = Tok.getIdentifierInfo())
451  return II->getName();
452  }
453 
454  // Resize the buffer if we need to copy into it.
455  if (Tok.needsCleaning())
456  Buffer.resize(Tok.getLength());
457 
458  const char *Ptr = Buffer.data();
459  unsigned Len = getSpelling(Tok, Ptr, Invalid);
460  return StringRef(Ptr, Len);
461 }
462 
463 /// CreateString - Plop the specified string into a scratch buffer and return a
464 /// location for it. If specified, the source location provides a source
465 /// location for the token.
466 void Preprocessor::CreateString(StringRef Str, Token &Tok,
467  SourceLocation ExpansionLocStart,
468  SourceLocation ExpansionLocEnd) {
469  Tok.setLength(Str.size());
470 
471  const char *DestPtr;
472  SourceLocation Loc = ScratchBuf->getToken(Str.data(), Str.size(), DestPtr);
473 
474  if (ExpansionLocStart.isValid())
475  Loc = SourceMgr.createExpansionLoc(Loc, ExpansionLocStart,
476  ExpansionLocEnd, Str.size());
477  Tok.setLocation(Loc);
478 
479  // If this is a raw identifier or a literal token, set the pointer data.
480  if (Tok.is(tok::raw_identifier))
481  Tok.setRawIdentifierData(DestPtr);
482  else if (Tok.isLiteral())
483  Tok.setLiteralData(DestPtr);
484 }
485 
487  if (!getLangOpts().isCompilingModule())
488  return nullptr;
489 
490  return getHeaderSearchInfo().lookupModule(getLangOpts().CurrentModule);
491 }
492 
493 //===----------------------------------------------------------------------===//
494 // Preprocessor Initialization Methods
495 //===----------------------------------------------------------------------===//
496 
497 /// EnterMainSourceFile - Enter the specified FileID as the main source file,
498 /// which implicitly adds the builtin defines etc.
500  // We do not allow the preprocessor to reenter the main file. Doing so will
501  // cause FileID's to accumulate information from both runs (e.g. #line
502  // information) and predefined macros aren't guaranteed to be set properly.
503  assert(NumEnteredSourceFiles == 0 && "Cannot reenter the main file!");
504  FileID MainFileID = SourceMgr.getMainFileID();
505 
506  // If MainFileID is loaded it means we loaded an AST file, no need to enter
507  // a main file.
508  if (!SourceMgr.isLoadedFileID(MainFileID)) {
509  // Enter the main file source buffer.
510  EnterSourceFile(MainFileID, nullptr, SourceLocation());
511 
512  // If we've been asked to skip bytes in the main file (e.g., as part of a
513  // precompiled preamble), do so now.
514  if (SkipMainFilePreamble.first > 0)
515  CurLexer->SetByteOffset(SkipMainFilePreamble.first,
516  SkipMainFilePreamble.second);
517 
518  // Tell the header info that the main file was entered. If the file is later
519  // #imported, it won't be re-entered.
520  if (const FileEntry *FE = SourceMgr.getFileEntryForID(MainFileID))
521  HeaderInfo.IncrementIncludeCount(FE);
522  }
523 
524  // Preprocess Predefines to populate the initial preprocessor state.
525  std::unique_ptr<llvm::MemoryBuffer> SB =
526  llvm::MemoryBuffer::getMemBufferCopy(Predefines, "<built-in>");
527  assert(SB && "Cannot create predefined source buffer");
528  FileID FID = SourceMgr.createFileID(std::move(SB));
529  assert(FID.isValid() && "Could not create FileID for predefines?");
530  setPredefinesFileID(FID);
531 
532  // Start parsing the predefines.
533  EnterSourceFile(FID, nullptr, SourceLocation());
534 }
535 
536 void Preprocessor::replayPreambleConditionalStack() {
537  // Restore the conditional stack from the preamble, if there is one.
538  if (PreambleConditionalStack.isReplaying()) {
539  assert(CurPPLexer &&
540  "CurPPLexer is null when calling replayPreambleConditionalStack.");
541  CurPPLexer->setConditionalLevels(PreambleConditionalStack.getStack());
542  PreambleConditionalStack.doneReplaying();
543  if (PreambleConditionalStack.reachedEOFWhileSkipping())
544  SkipExcludedConditionalBlock(
545  PreambleConditionalStack.SkipInfo->HashTokenLoc,
546  PreambleConditionalStack.SkipInfo->IfTokenLoc,
547  PreambleConditionalStack.SkipInfo->FoundNonSkipPortion,
548  PreambleConditionalStack.SkipInfo->FoundElse,
549  PreambleConditionalStack.SkipInfo->ElseLoc);
550  }
551 }
552 
554  // Notify the client that we reached the end of the source file.
555  if (Callbacks)
556  Callbacks->EndOfMainFile();
557 }
558 
559 //===----------------------------------------------------------------------===//
560 // Lexer Event Handling.
561 //===----------------------------------------------------------------------===//
562 
563 /// LookUpIdentifierInfo - Given a tok::raw_identifier token, look up the
564 /// identifier information for the token and install it into the token,
565 /// updating the token kind accordingly.
567  assert(!Identifier.getRawIdentifier().empty() && "No raw identifier data!");
568 
569  // Look up this token, see if it is a macro, or if it is a language keyword.
570  IdentifierInfo *II;
571  if (!Identifier.needsCleaning() && !Identifier.hasUCN()) {
572  // No cleaning needed, just use the characters from the lexed buffer.
573  II = getIdentifierInfo(Identifier.getRawIdentifier());
574  } else {
575  // Cleaning needed, alloca a buffer, clean into it, then use the buffer.
576  SmallString<64> IdentifierBuffer;
577  StringRef CleanedStr = getSpelling(Identifier, IdentifierBuffer);
578 
579  if (Identifier.hasUCN()) {
580  SmallString<64> UCNIdentifierBuffer;
581  expandUCNs(UCNIdentifierBuffer, CleanedStr);
582  II = getIdentifierInfo(UCNIdentifierBuffer);
583  } else {
584  II = getIdentifierInfo(CleanedStr);
585  }
586  }
587 
588  // Update the token info (identifier info and appropriate token kind).
589  Identifier.setIdentifierInfo(II);
590  if (getLangOpts().MSVCCompat && II->isCPlusPlusOperatorKeyword() &&
592  Identifier.setKind(tok::identifier);
593  else
594  Identifier.setKind(II->getTokenID());
595 
596  return II;
597 }
598 
599 void Preprocessor::SetPoisonReason(IdentifierInfo *II, unsigned DiagID) {
600  PoisonReasons[II] = DiagID;
601 }
602 
604  assert(Ident__exception_code && Ident__exception_info);
605  assert(Ident___exception_code && Ident___exception_info);
606  Ident__exception_code->setIsPoisoned(Poison);
607  Ident___exception_code->setIsPoisoned(Poison);
608  Ident_GetExceptionCode->setIsPoisoned(Poison);
609  Ident__exception_info->setIsPoisoned(Poison);
610  Ident___exception_info->setIsPoisoned(Poison);
611  Ident_GetExceptionInfo->setIsPoisoned(Poison);
612  Ident__abnormal_termination->setIsPoisoned(Poison);
613  Ident___abnormal_termination->setIsPoisoned(Poison);
614  Ident_AbnormalTermination->setIsPoisoned(Poison);
615 }
616 
618  assert(Identifier.getIdentifierInfo() &&
619  "Can't handle identifiers without identifier info!");
620  llvm::DenseMap<IdentifierInfo*,unsigned>::const_iterator it =
621  PoisonReasons.find(Identifier.getIdentifierInfo());
622  if(it == PoisonReasons.end())
623  Diag(Identifier, diag::err_pp_used_poisoned_id);
624  else
625  Diag(Identifier,it->second) << Identifier.getIdentifierInfo();
626 }
627 
628 /// \brief Returns a diagnostic message kind for reporting a future keyword as
629 /// appropriate for the identifier and specified language.
631  const LangOptions &LangOpts) {
632  assert(II.isFutureCompatKeyword() && "diagnostic should not be needed");
633 
634  if (LangOpts.CPlusPlus)
635  return llvm::StringSwitch<diag::kind>(II.getName())
636 #define CXX11_KEYWORD(NAME, FLAGS) \
637  .Case(#NAME, diag::warn_cxx11_keyword)
638 #define CXX2A_KEYWORD(NAME, FLAGS) \
639  .Case(#NAME, diag::warn_cxx2a_keyword)
640 #include "clang/Basic/TokenKinds.def"
641  ;
642 
643  llvm_unreachable(
644  "Keyword not known to come from a newer Standard or proposed Standard");
645 }
646 
647 void Preprocessor::updateOutOfDateIdentifier(IdentifierInfo &II) const {
648  assert(II.isOutOfDate() && "not out of date");
650 }
651 
652 /// HandleIdentifier - This callback is invoked when the lexer reads an
653 /// identifier. This callback looks up the identifier in the map and/or
654 /// potentially macro expands it or turns it into a named token (like 'for').
655 ///
656 /// Note that callers of this method are guarded by checking the
657 /// IdentifierInfo's 'isHandleIdentifierCase' bit. If this method changes, the
658 /// IdentifierInfo methods that compute these properties will need to change to
659 /// match.
661  assert(Identifier.getIdentifierInfo() &&
662  "Can't handle identifiers without identifier info!");
663 
664  IdentifierInfo &II = *Identifier.getIdentifierInfo();
665 
666  // If the information about this identifier is out of date, update it from
667  // the external source.
668  // We have to treat __VA_ARGS__ in a special way, since it gets
669  // serialized with isPoisoned = true, but our preprocessor may have
670  // unpoisoned it if we're defining a C99 macro.
671  if (II.isOutOfDate()) {
672  bool CurrentIsPoisoned = false;
673  const bool IsSpecialVariadicMacro =
674  &II == Ident__VA_ARGS__ || &II == Ident__VA_OPT__;
675  if (IsSpecialVariadicMacro)
676  CurrentIsPoisoned = II.isPoisoned();
677 
678  updateOutOfDateIdentifier(II);
679  Identifier.setKind(II.getTokenID());
680 
681  if (IsSpecialVariadicMacro)
682  II.setIsPoisoned(CurrentIsPoisoned);
683  }
684 
685  // If this identifier was poisoned, and if it was not produced from a macro
686  // expansion, emit an error.
687  if (II.isPoisoned() && CurPPLexer) {
688  HandlePoisonedIdentifier(Identifier);
689  }
690 
691  // If this is a macro to be expanded, do it.
692  if (MacroDefinition MD = getMacroDefinition(&II)) {
693  auto *MI = MD.getMacroInfo();
694  assert(MI && "macro definition with no macro info?");
695  if (!DisableMacroExpansion) {
696  if (!Identifier.isExpandDisabled() && MI->isEnabled()) {
697  // C99 6.10.3p10: If the preprocessing token immediately after the
698  // macro name isn't a '(', this macro should not be expanded.
699  if (!MI->isFunctionLike() || isNextPPTokenLParen())
700  return HandleMacroExpandedIdentifier(Identifier, MD);
701  } else {
702  // C99 6.10.3.4p2 says that a disabled macro may never again be
703  // expanded, even if it's in a context where it could be expanded in the
704  // future.
705  Identifier.setFlag(Token::DisableExpand);
706  if (MI->isObjectLike() || isNextPPTokenLParen())
707  Diag(Identifier, diag::pp_disabled_macro_expansion);
708  }
709  }
710  }
711 
712  // If this identifier is a keyword in a newer Standard or proposed Standard,
713  // produce a warning. Don't warn if we're not considering macro expansion,
714  // since this identifier might be the name of a macro.
715  // FIXME: This warning is disabled in cases where it shouldn't be, like
716  // "#define constexpr constexpr", "int constexpr;"
717  if (II.isFutureCompatKeyword() && !DisableMacroExpansion) {
718  Diag(Identifier, getFutureCompatDiagKind(II, getLangOpts()))
719  << II.getName();
720  // Don't diagnose this keyword again in this translation unit.
721  II.setIsFutureCompatKeyword(false);
722  }
723 
724  // If this is an extension token, diagnose its use.
725  // We avoid diagnosing tokens that originate from macro definitions.
726  // FIXME: This warning is disabled in cases where it shouldn't be,
727  // like "#define TY typeof", "TY(1) x".
728  if (II.isExtensionToken() && !DisableMacroExpansion)
729  Diag(Identifier, diag::ext_token_used);
730 
731  // If this is the 'import' contextual keyword following an '@', note
732  // that the next token indicates a module name.
733  //
734  // Note that we do not treat 'import' as a contextual
735  // keyword when we're in a caching lexer, because caching lexers only get
736  // used in contexts where import declarations are disallowed.
737  //
738  // Likewise if this is the C++ Modules TS import keyword.
739  if (((LastTokenWasAt && II.isModulesImport()) ||
740  Identifier.is(tok::kw_import)) &&
741  !InMacroArgs && !DisableMacroExpansion &&
742  (getLangOpts().Modules || getLangOpts().DebuggerSupport) &&
743  CurLexerKind != CLK_CachingLexer) {
744  ModuleImportLoc = Identifier.getLocation();
745  ModuleImportPath.clear();
746  ModuleImportExpectsIdentifier = true;
747  CurLexerKind = CLK_LexAfterModuleImport;
748  }
749  return true;
750 }
751 
753  // We loop here until a lex function returns a token; this avoids recursion.
754  bool ReturnedToken;
755  do {
756  switch (CurLexerKind) {
757  case CLK_Lexer:
758  ReturnedToken = CurLexer->Lex(Result);
759  break;
760  case CLK_PTHLexer:
761  ReturnedToken = CurPTHLexer->Lex(Result);
762  break;
763  case CLK_TokenLexer:
764  ReturnedToken = CurTokenLexer->Lex(Result);
765  break;
766  case CLK_CachingLexer:
767  CachingLex(Result);
768  ReturnedToken = true;
769  break;
770  case CLK_LexAfterModuleImport:
771  LexAfterModuleImport(Result);
772  ReturnedToken = true;
773  break;
774  }
775  } while (!ReturnedToken);
776 
777  if (Result.is(tok::code_completion))
779 
780  LastTokenWasAt = Result.is(tok::at);
781 }
782 
783 /// \brief Lex a token following the 'import' contextual keyword.
784 ///
786  // Figure out what kind of lexer we actually have.
788 
789  // Lex the next token.
790  Lex(Result);
791 
792  // The token sequence
793  //
794  // import identifier (. identifier)*
795  //
796  // indicates a module import directive. We already saw the 'import'
797  // contextual keyword, so now we're looking for the identifiers.
798  if (ModuleImportExpectsIdentifier && Result.getKind() == tok::identifier) {
799  // We expected to see an identifier here, and we did; continue handling
800  // identifiers.
801  ModuleImportPath.push_back(std::make_pair(Result.getIdentifierInfo(),
802  Result.getLocation()));
803  ModuleImportExpectsIdentifier = false;
804  CurLexerKind = CLK_LexAfterModuleImport;
805  return;
806  }
807 
808  // If we're expecting a '.' or a ';', and we got a '.', then wait until we
809  // see the next identifier. (We can also see a '[[' that begins an
810  // attribute-specifier-seq here under the C++ Modules TS.)
811  if (!ModuleImportExpectsIdentifier && Result.getKind() == tok::period) {
812  ModuleImportExpectsIdentifier = true;
813  CurLexerKind = CLK_LexAfterModuleImport;
814  return;
815  }
816 
817  // If we have a non-empty module path, load the named module.
818  if (!ModuleImportPath.empty()) {
819  // Under the Modules TS, the dot is just part of the module name, and not
820  // a real hierarachy separator. Flatten such module names now.
821  //
822  // FIXME: Is this the right level to be performing this transformation?
823  std::string FlatModuleName;
824  if (getLangOpts().ModulesTS) {
825  for (auto &Piece : ModuleImportPath) {
826  if (!FlatModuleName.empty())
827  FlatModuleName += ".";
828  FlatModuleName += Piece.first->getName();
829  }
830  SourceLocation FirstPathLoc = ModuleImportPath[0].second;
831  ModuleImportPath.clear();
832  ModuleImportPath.push_back(
833  std::make_pair(getIdentifierInfo(FlatModuleName), FirstPathLoc));
834  }
835 
836  Module *Imported = nullptr;
837  if (getLangOpts().Modules) {
838  Imported = TheModuleLoader.loadModule(ModuleImportLoc,
839  ModuleImportPath,
841  /*IsIncludeDirective=*/false);
842  if (Imported)
843  makeModuleVisible(Imported, ModuleImportLoc);
844  }
845  if (Callbacks && (getLangOpts().Modules || getLangOpts().DebuggerSupport))
846  Callbacks->moduleImport(ModuleImportLoc, ModuleImportPath, Imported);
847  }
848 }
849 
851  CurSubmoduleState->VisibleModules.setVisible(
852  M, Loc, [](Module *) {},
853  [&](ArrayRef<Module *> Path, Module *Conflict, StringRef Message) {
854  // FIXME: Include the path in the diagnostic.
855  // FIXME: Include the import location for the conflicting module.
856  Diag(ModuleImportLoc, diag::warn_module_conflict)
857  << Path[0]->getFullModuleName()
858  << Conflict->getFullModuleName()
859  << Message;
860  });
861 
862  // Add this module to the imports list of the currently-built submodule.
863  if (!BuildingSubmoduleStack.empty() && M != BuildingSubmoduleStack.back().M)
864  BuildingSubmoduleStack.back().M->Imports.insert(M);
865 }
866 
868  const char *DiagnosticTag,
869  bool AllowMacroExpansion) {
870  // We need at least one string literal.
871  if (Result.isNot(tok::string_literal)) {
872  Diag(Result, diag::err_expected_string_literal)
873  << /*Source='in...'*/0 << DiagnosticTag;
874  return false;
875  }
876 
877  // Lex string literal tokens, optionally with macro expansion.
878  SmallVector<Token, 4> StrToks;
879  do {
880  StrToks.push_back(Result);
881 
882  if (Result.hasUDSuffix())
883  Diag(Result, diag::err_invalid_string_udl);
884 
885  if (AllowMacroExpansion)
886  Lex(Result);
887  else
888  LexUnexpandedToken(Result);
889  } while (Result.is(tok::string_literal));
890 
891  // Concatenate and parse the strings.
892  StringLiteralParser Literal(StrToks, *this);
893  assert(Literal.isAscii() && "Didn't allow wide strings in");
894 
895  if (Literal.hadError)
896  return false;
897 
898  if (Literal.Pascal) {
899  Diag(StrToks[0].getLocation(), diag::err_expected_string_literal)
900  << /*Source='in...'*/0 << DiagnosticTag;
901  return false;
902  }
903 
904  String = Literal.GetString();
905  return true;
906 }
907 
909  assert(Tok.is(tok::numeric_constant));
910  SmallString<8> IntegerBuffer;
911  bool NumberInvalid = false;
912  StringRef Spelling = getSpelling(Tok, IntegerBuffer, &NumberInvalid);
913  if (NumberInvalid)
914  return false;
915  NumericLiteralParser Literal(Spelling, Tok.getLocation(), *this);
916  if (Literal.hadError || !Literal.isIntegerLiteral() || Literal.hasUDSuffix())
917  return false;
918  llvm::APInt APVal(64, 0);
919  if (Literal.GetIntegerValue(APVal))
920  return false;
921  Lex(Tok);
922  Value = APVal.getLimitedValue();
923  return true;
924 }
925 
927  assert(Handler && "NULL comment handler");
928  assert(std::find(CommentHandlers.begin(), CommentHandlers.end(), Handler) ==
929  CommentHandlers.end() && "Comment handler already registered");
930  CommentHandlers.push_back(Handler);
931 }
932 
934  std::vector<CommentHandler *>::iterator Pos =
935  std::find(CommentHandlers.begin(), CommentHandlers.end(), Handler);
936  assert(Pos != CommentHandlers.end() && "Comment handler not registered");
937  CommentHandlers.erase(Pos);
938 }
939 
941  bool AnyPendingTokens = false;
942  for (std::vector<CommentHandler *>::iterator H = CommentHandlers.begin(),
943  HEnd = CommentHandlers.end();
944  H != HEnd; ++H) {
945  if ((*H)->HandleComment(*this, Comment))
946  AnyPendingTokens = true;
947  }
948  if (!AnyPendingTokens || getCommentRetentionState())
949  return false;
950  Lex(result);
951  return true;
952 }
953 
954 ModuleLoader::~ModuleLoader() = default;
955 
957 
959 
961  if (Record)
962  return;
963 
964  Record = new PreprocessingRecord(getSourceManager());
965  addPPCallbacks(std::unique_ptr<PPCallbacks>(Record));
966 }
void FinalizeForModelFile()
Cleanup after model file parsing.
IdentifierInfo * getIdentifierInfo(StringRef Name) const
Return information about the specified preprocessor identifier token.
Defines the clang::FileManager interface and associated types.
bool is(tok::TokenKind K) const
is/isNot - Predicates to check if this token is a specific kind, as in "if (Tok.is(tok::l_brace)) {...
Definition: Token.h:95
Defines the SourceManager interface.
Defines the clang::Module class, which describes a module in the source code.
Module * getCurrentModule()
Retrieves the module that we&#39;re currently building, if any.
Defines the FileSystemStatCache interface.
bool isLoadedFileID(FileID FID) const
Returns true if FID came from a PCH/Module.
void EndSourceFile()
Inform the preprocessor callbacks that processing is complete.
virtual void CodeCompleteNaturalLanguage()
Callback invoked when performing code completion in a part of the file where we expect natural langua...
bool isBeforeInTranslationUnit(SourceLocation LHS, SourceLocation RHS) const
Determines the order of 2 source locations in the translation unit.
const char * getCharacterData(SourceLocation SL, bool *Invalid=nullptr) const
Return a pointer to the start of the specified location in the appropriate spelling MemoryBuffer...
Defines the clang::MacroInfo and clang::MacroDirective classes.
A description of the current definition of a macro.
Definition: MacroInfo.h:564
bool isOutOfDate() const
Determine whether the information for this identifier is out of date with respect to the external sou...
void LexAfterModuleImport(Token &Result)
Lex a token following the &#39;import&#39; contextual keyword.
void setFlag(TokenFlags Flag)
Set the specified flag.
Definition: Token.h:234
StringRef getLastMacroWithSpelling(SourceLocation Loc, ArrayRef< TokenValue > Tokens) const
Return the name of the macro defined before Loc that has spelling Tokens.
void setCodeCompletionIdentifierInfo(IdentifierInfo *Filter)
Set the code completion token for filtering purposes.
void setCodeCompletionReached()
Note that we hit the code-completion point.
void createPreprocessingRecord()
Create a new preprocessing record, which will keep track of all macro expansions, macro definitions...
bool parseSimpleIntegerLiteral(Token &Tok, uint64_t &Value)
Parses a simple integer literal to get its numeric value.
void setPTHManager(PTHManager *pm)
Manage memory buffers across multiple users.
tokens_iterator tokens_begin() const
Definition: MacroInfo.h:243
tok::TokenKind getKind() const
Definition: Token.h:90
bool isLiteral() const
Return true if this is a "literal", like a numeric constant, string, etc.
Definition: Token.h:113
void SetPoisonReason(IdentifierInfo *II, unsigned DiagID)
Specifies the reason for poisoning an identifier.
One of these records is kept for each identifier that is lexed.
Represents a macro directive exported by a module.
Definition: MacroInfo.h:488
void setRawIdentifierData(const char *Ptr)
Definition: Token.h:207
Definition: Format.h:1900
Preprocessor(std::shared_ptr< PreprocessorOptions > PPOpts, DiagnosticsEngine &diags, LangOptions &opts, SourceManager &SM, MemoryBufferCache &PCMCache, HeaderSearch &Headers, ModuleLoader &TheModuleLoader, IdentifierInfoLookup *IILookup=nullptr, bool OwnsHeaderSearch=false, TranslationUnitKind TUKind=TU_Complete)
void setTarget(const TargetInfo &Target)
Set the target information for the header search, if not already known.
Token - This structure provides full information about a lexed token.
Definition: Token.h:35
void setKind(tok::TokenKind K)
Definition: Token.h:91
void removeCommentHandler(CommentHandler *Handler)
Remove the specified comment handler.
Keeps track of the various options that can be enabled, which controls the dialect of C or C++ that i...
Definition: LangOptions.h:48
const LangOptions & getLangOpts() const
Definition: Preprocessor.h:815
Describes a module or submodule.
Definition: Module.h:65
bool SetCodeCompletionPoint(const FileEntry *File, unsigned Line, unsigned Column)
Specify the point at which code-completion will be performed.
virtual ~ModuleLoader()
llvm::Registry< PragmaHandler > PragmaHandlerRegistry
Registry of pragma handlers added by plugins.
StringRef getSpelling(SourceLocation loc, SmallVectorImpl< char > &buffer, bool *invalid=nullptr) const
Return the &#39;spelling&#39; of the token at the given location; does not go up to the spelling location or ...
A record of the steps taken while preprocessing a source file, including the various preprocessing di...
HeaderSearch & getHeaderSearchInfo() const
Definition: Preprocessor.h:821
const Token & getReplacementToken(unsigned Tok) const
Definition: MacroInfo.h:236
bool hasUDSuffix() const
Return true if this token is a string or character literal which has a ud-suffix. ...
Definition: Token.h:291
const FormatToken & Tok
macro_iterator macro_begin(bool IncludeExternalMacros=true) const
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
void Initialize(const TargetInfo &Target, const TargetInfo *AuxTarget=nullptr)
Initialize the preprocessor using information about the target.
Concrete class used by the front-end to report problems and issues.
Definition: Diagnostic.h:147
macro_iterator macro_end(bool IncludeExternalMacros=true) const
void LexUnexpandedToken(Token &Result)
Just like Lex, but disables macro expansion of identifier tokens.
void recomputeCurLexerKind()
Recompute the current lexer kind based on the CurLexer/CurPTHLexer/ CurTokenLexer pointers...
Encapsulates the information needed to find the file referenced by a #include or #include_next, (sub-)framework lookup, etc.
Definition: HeaderSearch.h:148
void dump(const SourceManager &SM) const
Provides lookups to, and iteration over, IdentiferInfo objects.
bool isValid() const
Exposes information about the current target.
Definition: TargetInfo.h:54
IdentifierInfo * LookUpIdentifierInfo(Token &Identifier) const
Given a tok::raw_identifier token, look up the identifier information for the token and install it in...
Defines the clang::LangOptions interface.
void makeModuleVisible(Module *M, SourceLocation Loc)
SourceLocation getLocation() const
Definition: MacroInfo.h:462
bool isInSystemHeader(SourceLocation Loc) const
Returns if a SourceLocation is in a system header.
const FileEntry * getFileEntryForID(FileID FID) const
Returns the FileEntry record for the provided FileID.
const AnnotatedLine * Line
FileID createFileID(const FileEntry *SourceFile, SourceLocation IncludePos, SrcMgr::CharacteristicKind FileCharacter, int LoadedID=0, unsigned LoadedOffset=0)
Create a new FileID that represents the specified file being #included from the specified IncludePosi...
virtual void ReadDefinedMacros()=0
Read the set of macros defined by this external macro source.
MacroArgs - An instance of this class captures information about the formal arguments specified to a ...
Definition: MacroArgs.h:30
void EnterMainSourceFile()
Enter the specified FileID as the main source file, which implicitly adds the builtin defines etc...
SourceLocation getLocation() const
Return a source location identifier for the specified offset in the current file. ...
Definition: Token.h:124
Defines the clang::Preprocessor interface.
void setIsPoisoned(bool Value=true)
setIsPoisoned - Mark this identifier as poisoned.
static bool MacroDefinitionEquals(const MacroInfo *MI, ArrayRef< TokenValue > Tokens)
Compares macro tokens with a specified token value sequence.
size_t getTotalMemory() const
bool getCommentRetentionState() const
Definition: Preprocessor.h:859
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
SourceLocation createExpansionLoc(SourceLocation Loc, SourceLocation ExpansionLocStart, SourceLocation ExpansionLocEnd, unsigned TokLength, int LoadedID=0, unsigned LoadedOffset=0)
Return a new SourceLocation that encodes the fact that a token from SpellingLoc should actually be re...
bool isObjectLike() const
Definition: MacroInfo.h:201
void IncrementIncludeCount(const FileEntry *File)
Increment the count for the number of times the specified FileEntry has been entered.
Definition: HeaderSearch.h:455
The result type of a method or function.
StringRef GetString() const
Module * lookupModule(StringRef ModuleName, bool AllowSearch=true)
Lookup a module Search for a module with the given name.
const SourceManager & SM
Definition: Format.cpp:1337
SourceManager & getSourceManager() const
Definition: Preprocessor.h:819
void DumpMacro(const MacroInfo &MI) const
void overrideFileContents(const FileEntry *SourceFile, llvm::MemoryBuffer *Buffer, bool DoNotFree)
Override the contents of the given source file by providing an already-allocated buffer.
ExternalPreprocessorSource * getExternalSource() const
Definition: Preprocessor.h:837
bool isExpandDisabled() const
Return true if this identifier token should never be expanded in the future, due to C99 6...
Definition: Token.h:274
void addStatCache(std::unique_ptr< FileSystemStatCache > statCache, bool AtBeginning=false)
Installs the provided FileSystemStatCache object within the FileManager.
Definition: FileManager.cpp:66
Encodes a location in the source.
void setLength(unsigned Len)
Definition: Token.h:133
MacroDefinition getMacroDefinition(const IdentifierInfo *II)
Definition: Preprocessor.h:944
All of the names in this module are hidden.
Definition: Module.h:262
IdentifierInfo * getIdentifierInfo() const
Definition: Token.h:177
Cached information about one file (either on disk or in the virtual file system). ...
Definition: FileManager.h:59
void setIdentifierInfo(IdentifierInfo *II)
Definition: Token.h:186
void Lex(Token &Result)
Lex the next token for this preprocessor.
llvm::MemoryBuffer * getMemoryBufferForFile(const FileEntry *File, bool *Invalid=nullptr)
Retrieve the memory buffer associated with the given file.
bool isPoisoned() const
Return true if this token has been poisoned.
bool isAtStartOfLine() const
isAtStartOfLine - Return true if this token is at the start of a line.
Definition: Token.h:266
void expandUCNs(SmallVectorImpl< char > &Buf, StringRef Input)
Copy characters from Input to Buf, expanding any UCNs.
void DumpToken(const Token &Tok, bool DumpFlags=false) const
Print the token to stderr, used for debugging.
StringRef getName() const
Return the actual identifier string.
An opaque identifier used by SourceManager which refers to a source file (MemoryBuffer) along with it...
bool isNot(tok::TokenKind K) const
Definition: Token.h:96
Dataflow Directional Tag Classes.
bool isValid() const
Return true if this is a valid SourceLocation object.
unsigned getNumTokens() const
Return the number of tokens that this macro expands to.
Definition: MacroInfo.h:234
static diag::kind getFutureCompatDiagKind(const IdentifierInfo &II, const LangOptions &LangOpts)
Returns a diagnostic message kind for reporting a future keyword as appropriate for the identifier an...
void addCommentHandler(CommentHandler *Handler)
Add the specified comment handler to the preprocessor.
FileID getMainFileID() const
Returns the FileID of the main source file.
virtual ModuleLoadResult loadModule(SourceLocation ImportLoc, ModuleIdPath Path, Module::NameVisibilityKind Visibility, bool IsInclusionDirective)=0
Attempt to load the given module.
void CodeCompleteNaturalLanguage()
Hook used by the lexer to invoke the "natural language" code completion point.
Abstract interface for a module loader.
Definition: ModuleLoader.h:74
unsigned getLength() const
Definition: Token.h:127
void PoisonSEHIdentifiers(bool Poison=true)
void setLiteralData(const char *Ptr)
Definition: Token.h:219
Encapsulates the data about a macro definition (e.g.
Definition: MacroInfo.h:40
PragmaNamespace - This PragmaHandler subdivides the namespace of pragmas, allowing hierarchical pragm...
Definition: Pragma.h:90
bool HandleIdentifier(Token &Identifier)
Callback invoked when the lexer reads an identifier and has filled in the tokens IdentifierInfo membe...
bool FinishLexStringLiteral(Token &Result, std::string &String, const char *DiagnosticTag, bool AllowMacroExpansion)
Complete the lexing of a string literal where the first token has already been lexed (see LexStringLi...
void setConditionalLevels(ArrayRef< PPConditionalInfo > CL)
virtual void updateOutOfDateIdentifier(IdentifierInfo &II)=0
Update an out-of-date identifier.
void CreateString(StringRef Str, Token &Tok, SourceLocation ExpansionLocStart=SourceLocation(), SourceLocation ExpansionLocEnd=SourceLocation())
Plop the specified string into a scratch buffer and set the specified token&#39;s location and length to ...
void InitializeForModelFile()
Initialize the preprocessor to parse a model file.
void HandlePoisonedIdentifier(Token &Tok)
Display reason for poisoned identifier.
#define CXX11_KEYWORD(NAME, FLAGS)
bool HandleComment(Token &Token, SourceRange Comment)
Defines the clang::SourceLocation class and associated facilities.
StringRef getRawIdentifier() const
getRawIdentifier - For a raw identifier token (i.e., an identifier lexed in raw mode), returns a reference to the text substring in the buffer if known.
Definition: Token.h:203
TranslationUnitKind
Describes the kind of translation unit being processed.
Definition: LangOptions.h:242
void DumpLocation(SourceLocation Loc) const
StringLiteralParser - This decodes string escape characters and performs wide string analysis and Tra...
unsigned kind
All of the diagnostics that can be emitted by the frontend.
Definition: DiagnosticIDs.h:61
const char * getTokenName(TokenKind Kind) LLVM_READNONE
Determines the name of a token as used within the front end.
Definition: TokenKinds.cpp:25
Defines the clang::TargetInfo interface.
bool needsCleaning() const
Return true if this token has trigraphs or escaped newlines in it.
Definition: Token.h:283
NumericLiteralParser - This performs strict semantic analysis of the content of a ppnumber...
MacroMap::const_iterator macro_iterator
Abstract base class that describes a handler that will receive source ranges for each of the comments...
void setLocation(SourceLocation L)
Definition: Token.h:132
#define true
Definition: stdbool.h:32
A trivial tuple used to represent a source range.
bool hasUCN() const
Returns true if this token contains a universal character name.
Definition: Token.h:294
bool isFutureCompatKeyword() const
is/setIsFutureCompatKeyword - Initialize information about whether or not this language token is a ke...
Defines the PreprocessorLexer interface.
ScratchBuffer - This class exposes a simple interface for the dynamic construction of tokens...
Definition: ScratchBuffer.h:25
void InitializeTarget(const TargetInfo &Target, const TargetInfo *AuxTarget)
Perform target-specific initialization.
Definition: Builtins.cpp:43
bool hasLeadingSpace() const
Return true if this token has whitespace before it.
Definition: Token.h:270
DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) const
Forwarding function for diagnostics.
void addPPCallbacks(std::unique_ptr< PPCallbacks > C)
Definition: Preprocessor.h:912
This class handles loading and caching of source files into memory.
bool EnterSourceFile(FileID CurFileID, const DirectoryLookup *Dir, SourceLocation Loc)
Add a source file to the top of the include stack and start lexing tokens from it instead of the curr...