Preprocessor.cpp revision 5e35693721364673f8196e4f5a370f56b92e6053
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" 29#include "MacroArgs.h" 30#include "clang/Lex/ExternalPreprocessorSource.h" 31#include "clang/Lex/HeaderSearch.h" 32#include "clang/Lex/MacroInfo.h" 33#include "clang/Lex/Pragma.h" 34#include "clang/Lex/PreprocessingRecord.h" 35#include "clang/Lex/ScratchBuffer.h" 36#include "clang/Lex/LexDiagnostic.h" 37#include "clang/Lex/CodeCompletionHandler.h" 38#include "clang/Lex/ModuleLoader.h" 39#include "clang/Basic/SourceManager.h" 40#include "clang/Basic/FileManager.h" 41#include "clang/Basic/TargetInfo.h" 42#include "llvm/ADT/APFloat.h" 43#include "llvm/ADT/SmallVector.h" 44#include "llvm/Support/MemoryBuffer.h" 45#include "llvm/Support/raw_ostream.h" 46#include "llvm/Support/Capacity.h" 47using namespace clang; 48 49//===----------------------------------------------------------------------===// 50ExternalPreprocessorSource::~ExternalPreprocessorSource() { } 51 52Preprocessor::Preprocessor(DiagnosticsEngine &diags, LangOptions &opts, 53 const TargetInfo *target, SourceManager &SM, 54 HeaderSearch &Headers, ModuleLoader &TheModuleLoader, 55 IdentifierInfoLookup* IILookup, 56 bool OwnsHeaders, 57 bool DelayInitialization) 58 : Diags(&diags), Features(opts), Target(target),FileMgr(Headers.getFileMgr()), 59 SourceMgr(SM), HeaderInfo(Headers), TheModuleLoader(TheModuleLoader), 60 ExternalSource(0), 61 Identifiers(opts, IILookup), CodeComplete(0), 62 CodeCompletionFile(0), CodeCompletionOffset(0), CodeCompletionReached(0), 63 SkipMainFilePreamble(0, true), CurPPLexer(0), 64 CurDirLookup(0), CurLexerKind(CLK_Lexer), Callbacks(0), MacroArgCache(0), 65 Record(0), MIChainHead(0), MICache(0) 66{ 67 OwnsHeaderSearch = OwnsHeaders; 68 69 if (!DelayInitialization) { 70 assert(Target && "Must provide target information for PP initialization"); 71 Initialize(*Target); 72 } 73} 74 75Preprocessor::~Preprocessor() { 76 assert(BacktrackPositions.empty() && "EnableBacktrack/Backtrack imbalance!"); 77 78 while (!IncludeMacroStack.empty()) { 79 delete IncludeMacroStack.back().TheLexer; 80 delete IncludeMacroStack.back().TheTokenLexer; 81 IncludeMacroStack.pop_back(); 82 } 83 84 // Free any macro definitions. 85 for (MacroInfoChain *I = MIChainHead ; I ; I = I->Next) 86 I->MI.Destroy(); 87 88 // Free any cached macro expanders. 89 for (unsigned i = 0, e = NumCachedTokenLexers; i != e; ++i) 90 delete TokenLexerCache[i]; 91 92 // Free any cached MacroArgs. 93 for (MacroArgs *ArgList = MacroArgCache; ArgList; ) 94 ArgList = ArgList->deallocate(); 95 96 // Release pragma information. 97 delete PragmaHandlers; 98 99 // Delete the scratch buffer info. 100 delete ScratchBuf; 101 102 // Delete the header search info, if we own it. 103 if (OwnsHeaderSearch) 104 delete &HeaderInfo; 105 106 delete Callbacks; 107} 108 109void Preprocessor::Initialize(const TargetInfo &Target) { 110 assert((!this->Target || this->Target == &Target) && 111 "Invalid override of target information"); 112 this->Target = &Target; 113 114 // Initialize information about built-ins. 115 BuiltinInfo.InitializeTarget(Target); 116 117 ScratchBuf = new ScratchBuffer(SourceMgr); 118 CounterValue = 0; // __COUNTER__ starts at 0. 119 120 // Clear stats. 121 NumDirectives = NumDefined = NumUndefined = NumPragma = 0; 122 NumIf = NumElse = NumEndif = 0; 123 NumEnteredSourceFiles = 0; 124 NumMacroExpanded = NumFnMacroExpanded = NumBuiltinMacroExpanded = 0; 125 NumFastMacroExpanded = NumTokenPaste = NumFastTokenPaste = 0; 126 MaxIncludeStackDepth = 0; 127 NumSkipped = 0; 128 129 // Default to discarding comments. 130 KeepComments = false; 131 KeepMacroComments = false; 132 SuppressIncludeNotFoundError = false; 133 AutoModuleImport = false; 134 135 // Macro expansion is enabled. 136 DisableMacroExpansion = false; 137 InMacroArgs = false; 138 NumCachedTokenLexers = 0; 139 140 CachedLexPos = 0; 141 142 // We haven't read anything from the external source. 143 ReadMacrosFromExternalSource = false; 144 145 // "Poison" __VA_ARGS__, which can only appear in the expansion of a macro. 146 // This gets unpoisoned where it is allowed. 147 (Ident__VA_ARGS__ = getIdentifierInfo("__VA_ARGS__"))->setIsPoisoned(); 148 SetPoisonReason(Ident__VA_ARGS__,diag::ext_pp_bad_vaargs_use); 149 150 // Initialize the pragma handlers. 151 PragmaHandlers = new PragmaNamespace(StringRef()); 152 RegisterBuiltinPragmas(); 153 154 // Initialize builtin macros like __LINE__ and friends. 155 RegisterBuiltinMacros(); 156 157 if(Features.Borland) { 158 Ident__exception_info = getIdentifierInfo("_exception_info"); 159 Ident___exception_info = getIdentifierInfo("__exception_info"); 160 Ident_GetExceptionInfo = getIdentifierInfo("GetExceptionInformation"); 161 Ident__exception_code = getIdentifierInfo("_exception_code"); 162 Ident___exception_code = getIdentifierInfo("__exception_code"); 163 Ident_GetExceptionCode = getIdentifierInfo("GetExceptionCode"); 164 Ident__abnormal_termination = getIdentifierInfo("_abnormal_termination"); 165 Ident___abnormal_termination = getIdentifierInfo("__abnormal_termination"); 166 Ident_AbnormalTermination = getIdentifierInfo("AbnormalTermination"); 167 } else { 168 Ident__exception_info = Ident__exception_code = Ident__abnormal_termination = 0; 169 Ident___exception_info = Ident___exception_code = Ident___abnormal_termination = 0; 170 Ident_GetExceptionInfo = Ident_GetExceptionCode = Ident_AbnormalTermination = 0; 171 } 172} 173 174void Preprocessor::setPTHManager(PTHManager* pm) { 175 PTH.reset(pm); 176 FileMgr.addStatCache(PTH->createStatCache()); 177} 178 179void Preprocessor::DumpToken(const Token &Tok, bool DumpFlags) const { 180 llvm::errs() << tok::getTokenName(Tok.getKind()) << " '" 181 << getSpelling(Tok) << "'"; 182 183 if (!DumpFlags) return; 184 185 llvm::errs() << "\t"; 186 if (Tok.isAtStartOfLine()) 187 llvm::errs() << " [StartOfLine]"; 188 if (Tok.hasLeadingSpace()) 189 llvm::errs() << " [LeadingSpace]"; 190 if (Tok.isExpandDisabled()) 191 llvm::errs() << " [ExpandDisabled]"; 192 if (Tok.needsCleaning()) { 193 const char *Start = SourceMgr.getCharacterData(Tok.getLocation()); 194 llvm::errs() << " [UnClean='" << StringRef(Start, Tok.getLength()) 195 << "']"; 196 } 197 198 llvm::errs() << "\tLoc=<"; 199 DumpLocation(Tok.getLocation()); 200 llvm::errs() << ">"; 201} 202 203void Preprocessor::DumpLocation(SourceLocation Loc) const { 204 Loc.dump(SourceMgr); 205} 206 207void Preprocessor::DumpMacro(const MacroInfo &MI) const { 208 llvm::errs() << "MACRO: "; 209 for (unsigned i = 0, e = MI.getNumTokens(); i != e; ++i) { 210 DumpToken(MI.getReplacementToken(i)); 211 llvm::errs() << " "; 212 } 213 llvm::errs() << "\n"; 214} 215 216void Preprocessor::PrintStats() { 217 llvm::errs() << "\n*** Preprocessor Stats:\n"; 218 llvm::errs() << NumDirectives << " directives found:\n"; 219 llvm::errs() << " " << NumDefined << " #define.\n"; 220 llvm::errs() << " " << NumUndefined << " #undef.\n"; 221 llvm::errs() << " #include/#include_next/#import:\n"; 222 llvm::errs() << " " << NumEnteredSourceFiles << " source files entered.\n"; 223 llvm::errs() << " " << MaxIncludeStackDepth << " max include stack depth\n"; 224 llvm::errs() << " " << NumIf << " #if/#ifndef/#ifdef.\n"; 225 llvm::errs() << " " << NumElse << " #else/#elif.\n"; 226 llvm::errs() << " " << NumEndif << " #endif.\n"; 227 llvm::errs() << " " << NumPragma << " #pragma.\n"; 228 llvm::errs() << NumSkipped << " #if/#ifndef#ifdef regions skipped\n"; 229 230 llvm::errs() << NumMacroExpanded << "/" << NumFnMacroExpanded << "/" 231 << NumBuiltinMacroExpanded << " obj/fn/builtin macros expanded, " 232 << NumFastMacroExpanded << " on the fast path.\n"; 233 llvm::errs() << (NumFastTokenPaste+NumTokenPaste) 234 << " token paste (##) operations performed, " 235 << NumFastTokenPaste << " on the fast path.\n"; 236} 237 238Preprocessor::macro_iterator 239Preprocessor::macro_begin(bool IncludeExternalMacros) const { 240 if (IncludeExternalMacros && ExternalSource && 241 !ReadMacrosFromExternalSource) { 242 ReadMacrosFromExternalSource = true; 243 ExternalSource->ReadDefinedMacros(); 244 } 245 246 return Macros.begin(); 247} 248 249size_t Preprocessor::getTotalMemory() const { 250 return BP.getTotalMemory() 251 + llvm::capacity_in_bytes(MacroExpandedTokens) 252 + Predefines.capacity() /* Predefines buffer. */ 253 + llvm::capacity_in_bytes(Macros) 254 + llvm::capacity_in_bytes(PragmaPushMacroInfo) 255 + llvm::capacity_in_bytes(PoisonReasons) 256 + llvm::capacity_in_bytes(CommentHandlers); 257} 258 259Preprocessor::macro_iterator 260Preprocessor::macro_end(bool IncludeExternalMacros) const { 261 if (IncludeExternalMacros && ExternalSource && 262 !ReadMacrosFromExternalSource) { 263 ReadMacrosFromExternalSource = true; 264 ExternalSource->ReadDefinedMacros(); 265 } 266 267 return Macros.end(); 268} 269 270bool Preprocessor::SetCodeCompletionPoint(const FileEntry *File, 271 unsigned CompleteLine, 272 unsigned CompleteColumn) { 273 assert(File); 274 assert(CompleteLine && CompleteColumn && "Starts from 1:1"); 275 assert(!CodeCompletionFile && "Already set"); 276 277 using llvm::MemoryBuffer; 278 279 // Load the actual file's contents. 280 bool Invalid = false; 281 const MemoryBuffer *Buffer = SourceMgr.getMemoryBufferForFile(File, &Invalid); 282 if (Invalid) 283 return true; 284 285 // Find the byte position of the truncation point. 286 const char *Position = Buffer->getBufferStart(); 287 for (unsigned Line = 1; Line < CompleteLine; ++Line) { 288 for (; *Position; ++Position) { 289 if (*Position != '\r' && *Position != '\n') 290 continue; 291 292 // Eat \r\n or \n\r as a single line. 293 if ((Position[1] == '\r' || Position[1] == '\n') && 294 Position[0] != Position[1]) 295 ++Position; 296 ++Position; 297 break; 298 } 299 } 300 301 Position += CompleteColumn - 1; 302 303 // Insert '\0' at the code-completion point. 304 if (Position < Buffer->getBufferEnd()) { 305 CodeCompletionFile = File; 306 CodeCompletionOffset = Position - Buffer->getBufferStart(); 307 308 MemoryBuffer *NewBuffer = 309 MemoryBuffer::getNewUninitMemBuffer(Buffer->getBufferSize() + 1, 310 Buffer->getBufferIdentifier()); 311 char *NewBuf = const_cast<char*>(NewBuffer->getBufferStart()); 312 char *NewPos = std::copy(Buffer->getBufferStart(), Position, NewBuf); 313 *NewPos = '\0'; 314 std::copy(Position, Buffer->getBufferEnd(), NewPos+1); 315 SourceMgr.overrideFileContents(File, NewBuffer); 316 } 317 318 return false; 319} 320 321void Preprocessor::CodeCompleteNaturalLanguage() { 322 if (CodeComplete) 323 CodeComplete->CodeCompleteNaturalLanguage(); 324 setCodeCompletionReached(); 325} 326 327/// getSpelling - This method is used to get the spelling of a token into a 328/// SmallVector. Note that the returned StringRef may not point to the 329/// supplied buffer if a copy can be avoided. 330StringRef Preprocessor::getSpelling(const Token &Tok, 331 SmallVectorImpl<char> &Buffer, 332 bool *Invalid) const { 333 // NOTE: this has to be checked *before* testing for an IdentifierInfo. 334 if (Tok.isNot(tok::raw_identifier)) { 335 // Try the fast path. 336 if (const IdentifierInfo *II = Tok.getIdentifierInfo()) 337 return II->getName(); 338 } 339 340 // Resize the buffer if we need to copy into it. 341 if (Tok.needsCleaning()) 342 Buffer.resize(Tok.getLength()); 343 344 const char *Ptr = Buffer.data(); 345 unsigned Len = getSpelling(Tok, Ptr, Invalid); 346 return StringRef(Ptr, Len); 347} 348 349/// CreateString - Plop the specified string into a scratch buffer and return a 350/// location for it. If specified, the source location provides a source 351/// location for the token. 352void Preprocessor::CreateString(const char *Buf, unsigned Len, Token &Tok, 353 SourceLocation ExpansionLocStart, 354 SourceLocation ExpansionLocEnd) { 355 Tok.setLength(Len); 356 357 const char *DestPtr; 358 SourceLocation Loc = ScratchBuf->getToken(Buf, Len, DestPtr); 359 360 if (ExpansionLocStart.isValid()) 361 Loc = SourceMgr.createExpansionLoc(Loc, ExpansionLocStart, 362 ExpansionLocEnd, Len); 363 Tok.setLocation(Loc); 364 365 // If this is a raw identifier or a literal token, set the pointer data. 366 if (Tok.is(tok::raw_identifier)) 367 Tok.setRawIdentifierData(DestPtr); 368 else if (Tok.isLiteral()) 369 Tok.setLiteralData(DestPtr); 370} 371 372 373 374//===----------------------------------------------------------------------===// 375// Preprocessor Initialization Methods 376//===----------------------------------------------------------------------===// 377 378 379/// EnterMainSourceFile - Enter the specified FileID as the main source file, 380/// which implicitly adds the builtin defines etc. 381void Preprocessor::EnterMainSourceFile() { 382 // We do not allow the preprocessor to reenter the main file. Doing so will 383 // cause FileID's to accumulate information from both runs (e.g. #line 384 // information) and predefined macros aren't guaranteed to be set properly. 385 assert(NumEnteredSourceFiles == 0 && "Cannot reenter the main file!"); 386 FileID MainFileID = SourceMgr.getMainFileID(); 387 388 // Enter the main file source buffer. 389 EnterSourceFile(MainFileID, 0, SourceLocation()); 390 391 // If we've been asked to skip bytes in the main file (e.g., as part of a 392 // precompiled preamble), do so now. 393 if (SkipMainFilePreamble.first > 0) 394 CurLexer->SkipBytes(SkipMainFilePreamble.first, 395 SkipMainFilePreamble.second); 396 397 // Tell the header info that the main file was entered. If the file is later 398 // #imported, it won't be re-entered. 399 if (const FileEntry *FE = SourceMgr.getFileEntryForID(MainFileID)) 400 HeaderInfo.IncrementIncludeCount(FE); 401 402 // Preprocess Predefines to populate the initial preprocessor state. 403 llvm::MemoryBuffer *SB = 404 llvm::MemoryBuffer::getMemBufferCopy(Predefines, "<built-in>"); 405 assert(SB && "Cannot create predefined source buffer"); 406 FileID FID = SourceMgr.createFileIDForMemBuffer(SB); 407 assert(!FID.isInvalid() && "Could not create FileID for predefines?"); 408 409 // Start parsing the predefines. 410 EnterSourceFile(FID, 0, SourceLocation()); 411} 412 413void Preprocessor::EndSourceFile() { 414 // Notify the client that we reached the end of the source file. 415 if (Callbacks) 416 Callbacks->EndOfMainFile(); 417} 418 419//===----------------------------------------------------------------------===// 420// Lexer Event Handling. 421//===----------------------------------------------------------------------===// 422 423/// LookUpIdentifierInfo - Given a tok::raw_identifier token, look up the 424/// identifier information for the token and install it into the token, 425/// updating the token kind accordingly. 426IdentifierInfo *Preprocessor::LookUpIdentifierInfo(Token &Identifier) const { 427 assert(Identifier.getRawIdentifierData() != 0 && "No raw identifier data!"); 428 429 // Look up this token, see if it is a macro, or if it is a language keyword. 430 IdentifierInfo *II; 431 if (!Identifier.needsCleaning()) { 432 // No cleaning needed, just use the characters from the lexed buffer. 433 II = getIdentifierInfo(StringRef(Identifier.getRawIdentifierData(), 434 Identifier.getLength())); 435 } else { 436 // Cleaning needed, alloca a buffer, clean into it, then use the buffer. 437 llvm::SmallString<64> IdentifierBuffer; 438 StringRef CleanedStr = getSpelling(Identifier, IdentifierBuffer); 439 II = getIdentifierInfo(CleanedStr); 440 } 441 442 // Update the token info (identifier info and appropriate token kind). 443 Identifier.setIdentifierInfo(II); 444 Identifier.setKind(II->getTokenID()); 445 446 return II; 447} 448 449void Preprocessor::SetPoisonReason(IdentifierInfo *II, unsigned DiagID) { 450 PoisonReasons[II] = DiagID; 451} 452 453void Preprocessor::PoisonSEHIdentifiers(bool Poison) { 454 assert(Ident__exception_code && Ident__exception_info); 455 assert(Ident___exception_code && Ident___exception_info); 456 Ident__exception_code->setIsPoisoned(Poison); 457 Ident___exception_code->setIsPoisoned(Poison); 458 Ident_GetExceptionCode->setIsPoisoned(Poison); 459 Ident__exception_info->setIsPoisoned(Poison); 460 Ident___exception_info->setIsPoisoned(Poison); 461 Ident_GetExceptionInfo->setIsPoisoned(Poison); 462 Ident__abnormal_termination->setIsPoisoned(Poison); 463 Ident___abnormal_termination->setIsPoisoned(Poison); 464 Ident_AbnormalTermination->setIsPoisoned(Poison); 465} 466 467void Preprocessor::HandlePoisonedIdentifier(Token & Identifier) { 468 assert(Identifier.getIdentifierInfo() && 469 "Can't handle identifiers without identifier info!"); 470 llvm::DenseMap<IdentifierInfo*,unsigned>::const_iterator it = 471 PoisonReasons.find(Identifier.getIdentifierInfo()); 472 if(it == PoisonReasons.end()) 473 Diag(Identifier, diag::err_pp_used_poisoned_id); 474 else 475 Diag(Identifier,it->second) << Identifier.getIdentifierInfo(); 476} 477 478/// HandleIdentifier - This callback is invoked when the lexer reads an 479/// identifier. This callback looks up the identifier in the map and/or 480/// potentially macro expands it or turns it into a named token (like 'for'). 481/// 482/// Note that callers of this method are guarded by checking the 483/// IdentifierInfo's 'isHandleIdentifierCase' bit. If this method changes, the 484/// IdentifierInfo methods that compute these properties will need to change to 485/// match. 486void Preprocessor::HandleIdentifier(Token &Identifier) { 487 assert(Identifier.getIdentifierInfo() && 488 "Can't handle identifiers without identifier info!"); 489 490 IdentifierInfo &II = *Identifier.getIdentifierInfo(); 491 492 // If the information about this identifier is out of date, update it from 493 // the external source. 494 if (II.isOutOfDate()) { 495 ExternalSource->updateOutOfDateIdentifier(II); 496 Identifier.setKind(II.getTokenID()); 497 } 498 499 // If this identifier was poisoned, and if it was not produced from a macro 500 // expansion, emit an error. 501 if (II.isPoisoned() && CurPPLexer) { 502 HandlePoisonedIdentifier(Identifier); 503 } 504 505 // If this is a macro to be expanded, do it. 506 if (MacroInfo *MI = getMacroInfo(&II)) { 507 if (!DisableMacroExpansion && !Identifier.isExpandDisabled()) { 508 if (MI->isEnabled()) { 509 if (!HandleMacroExpandedIdentifier(Identifier, MI)) 510 return; 511 } else { 512 // C99 6.10.3.4p2 says that a disabled macro may never again be 513 // expanded, even if it's in a context where it could be expanded in the 514 // future. 515 Identifier.setFlag(Token::DisableExpand); 516 } 517 } 518 } 519 520 // If this identifier is a keyword in C++11, produce a warning. Don't warn if 521 // we're not considering macro expansion, since this identifier might be the 522 // name of a macro. 523 // FIXME: This warning is disabled in cases where it shouldn't be, like 524 // "#define constexpr constexpr", "int constexpr;" 525 if (II.isCXX11CompatKeyword() & !DisableMacroExpansion) { 526 Diag(Identifier, diag::warn_cxx11_keyword) << II.getName(); 527 // Don't diagnose this keyword again in this translation unit. 528 II.setIsCXX11CompatKeyword(false); 529 } 530 531 // C++ 2.11p2: If this is an alternative representation of a C++ operator, 532 // then we act as if it is the actual operator and not the textual 533 // representation of it. 534 if (II.isCPlusPlusOperatorKeyword()) 535 Identifier.setIdentifierInfo(0); 536 537 // If this is an extension token, diagnose its use. 538 // We avoid diagnosing tokens that originate from macro definitions. 539 // FIXME: This warning is disabled in cases where it shouldn't be, 540 // like "#define TY typeof", "TY(1) x". 541 if (II.isExtensionToken() && !DisableMacroExpansion) 542 Diag(Identifier, diag::ext_token_used); 543 544 // If this is the '__import_module__' keyword, note that the next token 545 // indicates a module name. 546 if (II.getTokenID() == tok::kw___import_module__ && 547 !InMacroArgs && !DisableMacroExpansion) { 548 ModuleImportLoc = Identifier.getLocation(); 549 ModuleImportPath.clear(); 550 ModuleImportExpectsIdentifier = true; 551 CurLexerKind = CLK_LexAfterModuleImport; 552 } 553} 554 555/// \brief Lex a token following the __import_module__ keyword. 556void Preprocessor::LexAfterModuleImport(Token &Result) { 557 // Figure out what kind of lexer we actually have. 558 if (CurLexer) 559 CurLexerKind = CLK_Lexer; 560 else if (CurPTHLexer) 561 CurLexerKind = CLK_PTHLexer; 562 else if (CurTokenLexer) 563 CurLexerKind = CLK_TokenLexer; 564 else 565 CurLexerKind = CLK_CachingLexer; 566 567 // Lex the next token. 568 Lex(Result); 569 570 // The token sequence 571 // 572 // __import_module__ identifier (. identifier)* 573 // 574 // indicates a module import directive. We already saw the __import_module__ 575 // keyword, so now we're looking for the identifiers. 576 if (ModuleImportExpectsIdentifier && Result.getKind() == tok::identifier) { 577 // We expected to see an identifier here, and we did; continue handling 578 // identifiers. 579 ModuleImportPath.push_back(std::make_pair(Result.getIdentifierInfo(), 580 Result.getLocation())); 581 ModuleImportExpectsIdentifier = false; 582 CurLexerKind = CLK_LexAfterModuleImport; 583 return; 584 } 585 586 // If we're expecting a '.' or a ';', and we got a '.', then wait until we 587 // see the next identifier. 588 if (!ModuleImportExpectsIdentifier && Result.getKind() == tok::period) { 589 ModuleImportExpectsIdentifier = true; 590 CurLexerKind = CLK_LexAfterModuleImport; 591 return; 592 } 593 594 // If we have a non-empty module path, load the named module. 595 if (!ModuleImportPath.empty()) 596 (void)TheModuleLoader.loadModule(ModuleImportLoc, ModuleImportPath, 597 Module::MacrosVisible); 598} 599 600void Preprocessor::AddCommentHandler(CommentHandler *Handler) { 601 assert(Handler && "NULL comment handler"); 602 assert(std::find(CommentHandlers.begin(), CommentHandlers.end(), Handler) == 603 CommentHandlers.end() && "Comment handler already registered"); 604 CommentHandlers.push_back(Handler); 605} 606 607void Preprocessor::RemoveCommentHandler(CommentHandler *Handler) { 608 std::vector<CommentHandler *>::iterator Pos 609 = std::find(CommentHandlers.begin(), CommentHandlers.end(), Handler); 610 assert(Pos != CommentHandlers.end() && "Comment handler not registered"); 611 CommentHandlers.erase(Pos); 612} 613 614bool Preprocessor::HandleComment(Token &result, SourceRange Comment) { 615 bool AnyPendingTokens = false; 616 for (std::vector<CommentHandler *>::iterator H = CommentHandlers.begin(), 617 HEnd = CommentHandlers.end(); 618 H != HEnd; ++H) { 619 if ((*H)->HandleComment(*this, Comment)) 620 AnyPendingTokens = true; 621 } 622 if (!AnyPendingTokens || getCommentRetentionState()) 623 return false; 624 Lex(result); 625 return true; 626} 627 628ModuleLoader::~ModuleLoader() { } 629 630CommentHandler::~CommentHandler() { } 631 632CodeCompletionHandler::~CodeCompletionHandler() { } 633 634void Preprocessor::createPreprocessingRecord( 635 bool IncludeNestedMacroExpansions) { 636 if (Record) 637 return; 638 639 Record = new PreprocessingRecord(getSourceManager(), 640 IncludeNestedMacroExpansions); 641 addPPCallbacks(Record); 642} 643