Preprocessor.cpp revision 88a35862fbe473f2a4f0c19f24dbe536937e1dc6
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/ScratchBuffer.h" 35#include "clang/Lex/LexDiagnostic.h" 36#include "clang/Basic/SourceManager.h" 37#include "clang/Basic/FileManager.h" 38#include "clang/Basic/TargetInfo.h" 39#include "llvm/ADT/APFloat.h" 40#include "llvm/ADT/SmallVector.h" 41#include "llvm/Support/MemoryBuffer.h" 42#include "llvm/Support/raw_ostream.h" 43#include <cstdio> 44using namespace clang; 45 46//===----------------------------------------------------------------------===// 47ExternalPreprocessorSource::~ExternalPreprocessorSource() { } 48 49Preprocessor::Preprocessor(Diagnostic &diags, const LangOptions &opts, 50 const TargetInfo &target, SourceManager &SM, 51 HeaderSearch &Headers, 52 IdentifierInfoLookup* IILookup, 53 bool OwnsHeaders) 54 : Diags(&diags), Features(opts), Target(target),FileMgr(Headers.getFileMgr()), 55 SourceMgr(SM), HeaderInfo(Headers), ExternalSource(0), 56 Identifiers(opts, IILookup), BuiltinInfo(Target), CodeCompletionFile(0), 57 CurPPLexer(0), CurDirLookup(0), Callbacks(0), MacroArgCache(0) { 58 ScratchBuf = new ScratchBuffer(SourceMgr); 59 CounterValue = 0; // __COUNTER__ starts at 0. 60 OwnsHeaderSearch = OwnsHeaders; 61 62 // Clear stats. 63 NumDirectives = NumDefined = NumUndefined = NumPragma = 0; 64 NumIf = NumElse = NumEndif = 0; 65 NumEnteredSourceFiles = 0; 66 NumMacroExpanded = NumFnMacroExpanded = NumBuiltinMacroExpanded = 0; 67 NumFastMacroExpanded = NumTokenPaste = NumFastTokenPaste = 0; 68 MaxIncludeStackDepth = 0; 69 NumSkipped = 0; 70 71 // Default to discarding comments. 72 KeepComments = false; 73 KeepMacroComments = false; 74 75 // Macro expansion is enabled. 76 DisableMacroExpansion = false; 77 InMacroArgs = false; 78 NumCachedTokenLexers = 0; 79 80 CachedLexPos = 0; 81 82 // We haven't read anything from the external source. 83 ReadMacrosFromExternalSource = false; 84 85 // "Poison" __VA_ARGS__, which can only appear in the expansion of a macro. 86 // This gets unpoisoned where it is allowed. 87 (Ident__VA_ARGS__ = getIdentifierInfo("__VA_ARGS__"))->setIsPoisoned(); 88 89 // Initialize the pragma handlers. 90 PragmaHandlers = new PragmaNamespace(0); 91 RegisterBuiltinPragmas(); 92 93 // Initialize builtin macros like __LINE__ and friends. 94 RegisterBuiltinMacros(); 95} 96 97Preprocessor::~Preprocessor() { 98 assert(BacktrackPositions.empty() && "EnableBacktrack/Backtrack imbalance!"); 99 100 while (!IncludeMacroStack.empty()) { 101 delete IncludeMacroStack.back().TheLexer; 102 delete IncludeMacroStack.back().TheTokenLexer; 103 IncludeMacroStack.pop_back(); 104 } 105 106 // Free any macro definitions. 107 for (llvm::DenseMap<IdentifierInfo*, MacroInfo*>::iterator I = 108 Macros.begin(), E = Macros.end(); I != E; ++I) { 109 // We don't need to free the MacroInfo objects directly. These 110 // will be released when the BumpPtrAllocator 'BP' object gets 111 // destroyed. We still need to run the dtor, however, to free 112 // memory alocated by MacroInfo. 113 I->second->Destroy(BP); 114 I->first->setHasMacroDefinition(false); 115 } 116 117 // Free any cached macro expanders. 118 for (unsigned i = 0, e = NumCachedTokenLexers; i != e; ++i) 119 delete TokenLexerCache[i]; 120 121 // Free any cached MacroArgs. 122 for (MacroArgs *ArgList = MacroArgCache; ArgList; ) 123 ArgList = ArgList->deallocate(); 124 125 // Release pragma information. 126 delete PragmaHandlers; 127 128 // Delete the scratch buffer info. 129 delete ScratchBuf; 130 131 // Delete the header search info, if we own it. 132 if (OwnsHeaderSearch) 133 delete &HeaderInfo; 134 135 delete Callbacks; 136} 137 138void Preprocessor::setPTHManager(PTHManager* pm) { 139 PTH.reset(pm); 140 FileMgr.addStatCache(PTH->createStatCache()); 141} 142 143void Preprocessor::DumpToken(const Token &Tok, bool DumpFlags) const { 144 llvm::errs() << tok::getTokenName(Tok.getKind()) << " '" 145 << getSpelling(Tok) << "'"; 146 147 if (!DumpFlags) return; 148 149 llvm::errs() << "\t"; 150 if (Tok.isAtStartOfLine()) 151 llvm::errs() << " [StartOfLine]"; 152 if (Tok.hasLeadingSpace()) 153 llvm::errs() << " [LeadingSpace]"; 154 if (Tok.isExpandDisabled()) 155 llvm::errs() << " [ExpandDisabled]"; 156 if (Tok.needsCleaning()) { 157 const char *Start = SourceMgr.getCharacterData(Tok.getLocation()); 158 llvm::errs() << " [UnClean='" << std::string(Start, Start+Tok.getLength()) 159 << "']"; 160 } 161 162 llvm::errs() << "\tLoc=<"; 163 DumpLocation(Tok.getLocation()); 164 llvm::errs() << ">"; 165} 166 167void Preprocessor::DumpLocation(SourceLocation Loc) const { 168 Loc.dump(SourceMgr); 169} 170 171void Preprocessor::DumpMacro(const MacroInfo &MI) const { 172 llvm::errs() << "MACRO: "; 173 for (unsigned i = 0, e = MI.getNumTokens(); i != e; ++i) { 174 DumpToken(MI.getReplacementToken(i)); 175 llvm::errs() << " "; 176 } 177 llvm::errs() << "\n"; 178} 179 180void Preprocessor::PrintStats() { 181 llvm::errs() << "\n*** Preprocessor Stats:\n"; 182 llvm::errs() << NumDirectives << " directives found:\n"; 183 llvm::errs() << " " << NumDefined << " #define.\n"; 184 llvm::errs() << " " << NumUndefined << " #undef.\n"; 185 llvm::errs() << " #include/#include_next/#import:\n"; 186 llvm::errs() << " " << NumEnteredSourceFiles << " source files entered.\n"; 187 llvm::errs() << " " << MaxIncludeStackDepth << " max include stack depth\n"; 188 llvm::errs() << " " << NumIf << " #if/#ifndef/#ifdef.\n"; 189 llvm::errs() << " " << NumElse << " #else/#elif.\n"; 190 llvm::errs() << " " << NumEndif << " #endif.\n"; 191 llvm::errs() << " " << NumPragma << " #pragma.\n"; 192 llvm::errs() << NumSkipped << " #if/#ifndef#ifdef regions skipped\n"; 193 194 llvm::errs() << NumMacroExpanded << "/" << NumFnMacroExpanded << "/" 195 << NumBuiltinMacroExpanded << " obj/fn/builtin macros expanded, " 196 << NumFastMacroExpanded << " on the fast path.\n"; 197 llvm::errs() << (NumFastTokenPaste+NumTokenPaste) 198 << " token paste (##) operations performed, " 199 << NumFastTokenPaste << " on the fast path.\n"; 200} 201 202Preprocessor::macro_iterator 203Preprocessor::macro_begin(bool IncludeExternalMacros) const { 204 if (IncludeExternalMacros && ExternalSource && 205 !ReadMacrosFromExternalSource) { 206 ReadMacrosFromExternalSource = true; 207 ExternalSource->ReadDefinedMacros(); 208 } 209 210 return Macros.begin(); 211} 212 213Preprocessor::macro_iterator 214Preprocessor::macro_end(bool IncludeExternalMacros) const { 215 if (IncludeExternalMacros && ExternalSource && 216 !ReadMacrosFromExternalSource) { 217 ReadMacrosFromExternalSource = true; 218 ExternalSource->ReadDefinedMacros(); 219 } 220 221 return Macros.end(); 222} 223 224bool Preprocessor::SetCodeCompletionPoint(const FileEntry *File, 225 unsigned TruncateAtLine, 226 unsigned TruncateAtColumn) { 227 using llvm::MemoryBuffer; 228 229 CodeCompletionFile = File; 230 231 // Okay to clear out the code-completion point by passing NULL. 232 if (!CodeCompletionFile) 233 return false; 234 235 // Load the actual file's contents. 236 const MemoryBuffer *Buffer = SourceMgr.getMemoryBufferForFile(File); 237 if (!Buffer) 238 return true; 239 240 // Find the byte position of the truncation point. 241 const char *Position = Buffer->getBufferStart(); 242 for (unsigned Line = 1; Line < TruncateAtLine; ++Line) { 243 for (; *Position; ++Position) { 244 if (*Position != '\r' && *Position != '\n') 245 continue; 246 247 // Eat \r\n or \n\r as a single line. 248 if ((Position[1] == '\r' || Position[1] == '\n') && 249 Position[0] != Position[1]) 250 ++Position; 251 ++Position; 252 break; 253 } 254 } 255 256 Position += TruncateAtColumn - 1; 257 258 // Truncate the buffer. 259 if (Position < Buffer->getBufferEnd()) { 260 MemoryBuffer *TruncatedBuffer 261 = MemoryBuffer::getMemBufferCopy(Buffer->getBufferStart(), Position, 262 Buffer->getBufferIdentifier()); 263 SourceMgr.overrideFileContents(File, TruncatedBuffer); 264 } 265 266 return false; 267} 268 269bool Preprocessor::isCodeCompletionFile(SourceLocation FileLoc) const { 270 return CodeCompletionFile && FileLoc.isFileID() && 271 SourceMgr.getFileEntryForID(SourceMgr.getFileID(FileLoc)) 272 == CodeCompletionFile; 273} 274 275//===----------------------------------------------------------------------===// 276// Token Spelling 277//===----------------------------------------------------------------------===// 278 279/// getSpelling() - Return the 'spelling' of this token. The spelling of a 280/// token are the characters used to represent the token in the source file 281/// after trigraph expansion and escaped-newline folding. In particular, this 282/// wants to get the true, uncanonicalized, spelling of things like digraphs 283/// UCNs, etc. 284std::string Preprocessor::getSpelling(const Token &Tok, 285 const SourceManager &SourceMgr, 286 const LangOptions &Features) { 287 assert((int)Tok.getLength() >= 0 && "Token character range is bogus!"); 288 289 // If this token contains nothing interesting, return it directly. 290 const char* TokStart = SourceMgr.getCharacterData(Tok.getLocation()); 291 if (!Tok.needsCleaning()) 292 return std::string(TokStart, TokStart+Tok.getLength()); 293 294 std::string Result; 295 Result.reserve(Tok.getLength()); 296 297 // Otherwise, hard case, relex the characters into the string. 298 for (const char *Ptr = TokStart, *End = TokStart+Tok.getLength(); 299 Ptr != End; ) { 300 unsigned CharSize; 301 Result.push_back(Lexer::getCharAndSizeNoWarn(Ptr, CharSize, Features)); 302 Ptr += CharSize; 303 } 304 assert(Result.size() != unsigned(Tok.getLength()) && 305 "NeedsCleaning flag set on something that didn't need cleaning!"); 306 return Result; 307} 308 309/// getSpelling() - Return the 'spelling' of this token. The spelling of a 310/// token are the characters used to represent the token in the source file 311/// after trigraph expansion and escaped-newline folding. In particular, this 312/// wants to get the true, uncanonicalized, spelling of things like digraphs 313/// UCNs, etc. 314std::string Preprocessor::getSpelling(const Token &Tok) const { 315 return getSpelling(Tok, SourceMgr, Features); 316} 317 318/// getSpelling - This method is used to get the spelling of a token into a 319/// preallocated buffer, instead of as an std::string. The caller is required 320/// to allocate enough space for the token, which is guaranteed to be at least 321/// Tok.getLength() bytes long. The actual length of the token is returned. 322/// 323/// Note that this method may do two possible things: it may either fill in 324/// the buffer specified with characters, or it may *change the input pointer* 325/// to point to a constant buffer with the data already in it (avoiding a 326/// copy). The caller is not allowed to modify the returned buffer pointer 327/// if an internal buffer is returned. 328unsigned Preprocessor::getSpelling(const Token &Tok, 329 const char *&Buffer) const { 330 assert((int)Tok.getLength() >= 0 && "Token character range is bogus!"); 331 332 // If this token is an identifier, just return the string from the identifier 333 // table, which is very quick. 334 if (const IdentifierInfo *II = Tok.getIdentifierInfo()) { 335 Buffer = II->getNameStart(); 336 return II->getLength(); 337 } 338 339 // Otherwise, compute the start of the token in the input lexer buffer. 340 const char *TokStart = 0; 341 342 if (Tok.isLiteral()) 343 TokStart = Tok.getLiteralData(); 344 345 if (TokStart == 0) 346 TokStart = SourceMgr.getCharacterData(Tok.getLocation()); 347 348 // If this token contains nothing interesting, return it directly. 349 if (!Tok.needsCleaning()) { 350 Buffer = TokStart; 351 return Tok.getLength(); 352 } 353 354 // Otherwise, hard case, relex the characters into the string. 355 char *OutBuf = const_cast<char*>(Buffer); 356 for (const char *Ptr = TokStart, *End = TokStart+Tok.getLength(); 357 Ptr != End; ) { 358 unsigned CharSize; 359 *OutBuf++ = Lexer::getCharAndSizeNoWarn(Ptr, CharSize, Features); 360 Ptr += CharSize; 361 } 362 assert(unsigned(OutBuf-Buffer) != Tok.getLength() && 363 "NeedsCleaning flag set on something that didn't need cleaning!"); 364 365 return OutBuf-Buffer; 366} 367 368/// CreateString - Plop the specified string into a scratch buffer and return a 369/// location for it. If specified, the source location provides a source 370/// location for the token. 371void Preprocessor::CreateString(const char *Buf, unsigned Len, Token &Tok, 372 SourceLocation InstantiationLoc) { 373 Tok.setLength(Len); 374 375 const char *DestPtr; 376 SourceLocation Loc = ScratchBuf->getToken(Buf, Len, DestPtr); 377 378 if (InstantiationLoc.isValid()) 379 Loc = SourceMgr.createInstantiationLoc(Loc, InstantiationLoc, 380 InstantiationLoc, Len); 381 Tok.setLocation(Loc); 382 383 // If this is a literal token, set the pointer data. 384 if (Tok.isLiteral()) 385 Tok.setLiteralData(DestPtr); 386} 387 388 389/// AdvanceToTokenCharacter - Given a location that specifies the start of a 390/// token, return a new location that specifies a character within the token. 391SourceLocation Preprocessor::AdvanceToTokenCharacter(SourceLocation TokStart, 392 unsigned CharNo) { 393 // Figure out how many physical characters away the specified instantiation 394 // character is. This needs to take into consideration newlines and 395 // trigraphs. 396 const char *TokPtr = SourceMgr.getCharacterData(TokStart); 397 398 // If they request the first char of the token, we're trivially done. 399 if (CharNo == 0 && Lexer::isObviouslySimpleCharacter(*TokPtr)) 400 return TokStart; 401 402 unsigned PhysOffset = 0; 403 404 // The usual case is that tokens don't contain anything interesting. Skip 405 // over the uninteresting characters. If a token only consists of simple 406 // chars, this method is extremely fast. 407 while (Lexer::isObviouslySimpleCharacter(*TokPtr)) { 408 if (CharNo == 0) 409 return TokStart.getFileLocWithOffset(PhysOffset); 410 ++TokPtr, --CharNo, ++PhysOffset; 411 } 412 413 // If we have a character that may be a trigraph or escaped newline, use a 414 // lexer to parse it correctly. 415 for (; CharNo; --CharNo) { 416 unsigned Size; 417 Lexer::getCharAndSizeNoWarn(TokPtr, Size, Features); 418 TokPtr += Size; 419 PhysOffset += Size; 420 } 421 422 // Final detail: if we end up on an escaped newline, we want to return the 423 // location of the actual byte of the token. For example foo\<newline>bar 424 // advanced by 3 should return the location of b, not of \\. One compounding 425 // detail of this is that the escape may be made by a trigraph. 426 if (!Lexer::isObviouslySimpleCharacter(*TokPtr)) 427 PhysOffset = Lexer::SkipEscapedNewLines(TokPtr)-TokPtr; 428 429 return TokStart.getFileLocWithOffset(PhysOffset); 430} 431 432/// \brief Computes the source location just past the end of the 433/// token at this source location. 434/// 435/// This routine can be used to produce a source location that 436/// points just past the end of the token referenced by \p Loc, and 437/// is generally used when a diagnostic needs to point just after a 438/// token where it expected something different that it received. If 439/// the returned source location would not be meaningful (e.g., if 440/// it points into a macro), this routine returns an invalid 441/// source location. 442SourceLocation Preprocessor::getLocForEndOfToken(SourceLocation Loc) { 443 if (Loc.isInvalid() || !Loc.isFileID()) 444 return SourceLocation(); 445 446 unsigned Len = Lexer::MeasureTokenLength(Loc, getSourceManager(), Features); 447 return AdvanceToTokenCharacter(Loc, Len); 448} 449 450 451 452//===----------------------------------------------------------------------===// 453// Preprocessor Initialization Methods 454//===----------------------------------------------------------------------===// 455 456 457/// EnterMainSourceFile - Enter the specified FileID as the main source file, 458/// which implicitly adds the builtin defines etc. 459void Preprocessor::EnterMainSourceFile() { 460 // We do not allow the preprocessor to reenter the main file. Doing so will 461 // cause FileID's to accumulate information from both runs (e.g. #line 462 // information) and predefined macros aren't guaranteed to be set properly. 463 assert(NumEnteredSourceFiles == 0 && "Cannot reenter the main file!"); 464 FileID MainFileID = SourceMgr.getMainFileID(); 465 466 // Enter the main file source buffer. 467 std::string ErrorStr; 468 bool Res = EnterSourceFile(MainFileID, 0, ErrorStr); 469 assert(!Res && "Entering main file should not fail!"); 470 471 // Tell the header info that the main file was entered. If the file is later 472 // #imported, it won't be re-entered. 473 if (const FileEntry *FE = SourceMgr.getFileEntryForID(MainFileID)) 474 HeaderInfo.IncrementIncludeCount(FE); 475 476 // Preprocess Predefines to populate the initial preprocessor state. 477 llvm::MemoryBuffer *SB = 478 llvm::MemoryBuffer::getMemBufferCopy(Predefines.data(), 479 Predefines.data() + Predefines.size(), 480 "<built-in>"); 481 assert(SB && "Cannot fail to create predefined source buffer"); 482 FileID FID = SourceMgr.createFileIDForMemBuffer(SB); 483 assert(!FID.isInvalid() && "Could not create FileID for predefines?"); 484 485 // Start parsing the predefines. 486 Res = EnterSourceFile(FID, 0, ErrorStr); 487 assert(!Res && "Entering predefines should not fail!"); 488} 489 490 491//===----------------------------------------------------------------------===// 492// Lexer Event Handling. 493//===----------------------------------------------------------------------===// 494 495/// LookUpIdentifierInfo - Given a tok::identifier token, look up the 496/// identifier information for the token and install it into the token. 497IdentifierInfo *Preprocessor::LookUpIdentifierInfo(Token &Identifier, 498 const char *BufPtr) const { 499 assert(Identifier.is(tok::identifier) && "Not an identifier!"); 500 assert(Identifier.getIdentifierInfo() == 0 && "Identinfo already exists!"); 501 502 // Look up this token, see if it is a macro, or if it is a language keyword. 503 IdentifierInfo *II; 504 if (BufPtr && !Identifier.needsCleaning()) { 505 // No cleaning needed, just use the characters from the lexed buffer. 506 II = getIdentifierInfo(llvm::StringRef(BufPtr, Identifier.getLength())); 507 } else { 508 // Cleaning needed, alloca a buffer, clean into it, then use the buffer. 509 llvm::SmallVector<char, 64> IdentifierBuffer; 510 IdentifierBuffer.resize(Identifier.getLength()); 511 const char *TmpBuf = &IdentifierBuffer[0]; 512 unsigned Size = getSpelling(Identifier, TmpBuf); 513 II = getIdentifierInfo(llvm::StringRef(TmpBuf, Size)); 514 } 515 Identifier.setIdentifierInfo(II); 516 return II; 517} 518 519 520/// HandleIdentifier - This callback is invoked when the lexer reads an 521/// identifier. This callback looks up the identifier in the map and/or 522/// potentially macro expands it or turns it into a named token (like 'for'). 523/// 524/// Note that callers of this method are guarded by checking the 525/// IdentifierInfo's 'isHandleIdentifierCase' bit. If this method changes, the 526/// IdentifierInfo methods that compute these properties will need to change to 527/// match. 528void Preprocessor::HandleIdentifier(Token &Identifier) { 529 assert(Identifier.getIdentifierInfo() && 530 "Can't handle identifiers without identifier info!"); 531 532 IdentifierInfo &II = *Identifier.getIdentifierInfo(); 533 534 // If this identifier was poisoned, and if it was not produced from a macro 535 // expansion, emit an error. 536 if (II.isPoisoned() && CurPPLexer) { 537 if (&II != Ident__VA_ARGS__) // We warn about __VA_ARGS__ with poisoning. 538 Diag(Identifier, diag::err_pp_used_poisoned_id); 539 else 540 Diag(Identifier, diag::ext_pp_bad_vaargs_use); 541 } 542 543 // If this is a macro to be expanded, do it. 544 if (MacroInfo *MI = getMacroInfo(&II)) { 545 if (!DisableMacroExpansion && !Identifier.isExpandDisabled()) { 546 if (MI->isEnabled()) { 547 if (!HandleMacroExpandedIdentifier(Identifier, MI)) 548 return; 549 } else { 550 // C99 6.10.3.4p2 says that a disabled macro may never again be 551 // expanded, even if it's in a context where it could be expanded in the 552 // future. 553 Identifier.setFlag(Token::DisableExpand); 554 } 555 } 556 } 557 558 // C++ 2.11p2: If this is an alternative representation of a C++ operator, 559 // then we act as if it is the actual operator and not the textual 560 // representation of it. 561 if (II.isCPlusPlusOperatorKeyword()) 562 Identifier.setIdentifierInfo(0); 563 564 // If this is an extension token, diagnose its use. 565 // We avoid diagnosing tokens that originate from macro definitions. 566 // FIXME: This warning is disabled in cases where it shouldn't be, 567 // like "#define TY typeof", "TY(1) x". 568 if (II.isExtensionToken() && !DisableMacroExpansion) 569 Diag(Identifier, diag::ext_token_used); 570} 571 572void Preprocessor::AddCommentHandler(CommentHandler *Handler) { 573 assert(Handler && "NULL comment handler"); 574 assert(std::find(CommentHandlers.begin(), CommentHandlers.end(), Handler) == 575 CommentHandlers.end() && "Comment handler already registered"); 576 CommentHandlers.push_back(Handler); 577} 578 579void Preprocessor::RemoveCommentHandler(CommentHandler *Handler) { 580 std::vector<CommentHandler *>::iterator Pos 581 = std::find(CommentHandlers.begin(), CommentHandlers.end(), Handler); 582 assert(Pos != CommentHandlers.end() && "Comment handler not registered"); 583 CommentHandlers.erase(Pos); 584} 585 586void Preprocessor::HandleComment(SourceRange Comment) { 587 for (std::vector<CommentHandler *>::iterator H = CommentHandlers.begin(), 588 HEnd = CommentHandlers.end(); 589 H != HEnd; ++H) 590 (*H)->HandleComment(*this, Comment); 591} 592 593CommentHandler::~CommentHandler() { } 594