18c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===--- PPLexerChange.cpp - Handle changing lexers in the preprocessor ---===// 28c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// 38c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// The LLVM Compiler Infrastructure 48c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// 58c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// This file is distributed under the University of Illinois Open Source 68c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// License. See LICENSE.TXT for details. 78c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// 88c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===----------------------------------------------------------------------===// 98c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// 108c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// This file implements pieces of the Preprocessor interface that manage the 118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// current lexer stack. 128c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner// 138c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===----------------------------------------------------------------------===// 148c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 158c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner#include "clang/Lex/Preprocessor.h" 16aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor#include "clang/Basic/FileManager.h" 178c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner#include "clang/Basic/SourceManager.h" 1855fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/HeaderSearch.h" 1955fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/LexDiagnostic.h" 2055fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/MacroInfo.h" 2155fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "llvm/ADT/StringSwitch.h" 22585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor#include "llvm/Support/FileSystem.h" 2315ba2af0f9ad52e67e908179b8ec2eb404e11c61Ted Kremenek#include "llvm/Support/MemoryBuffer.h" 248229d22e6449851b89361bf2f41804557328be63Rafael Espindola#include "llvm/Support/Path.h" 258c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerusing namespace clang; 268c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 274b391087f9c5582d448ab66ccbc7028f7673f380Ted KremenekPPCallbacks::~PPCallbacks() {} 288c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===----------------------------------------------------------------------===// 306b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner// Miscellaneous Methods. 318c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===----------------------------------------------------------------------===// 328c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 338c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// isInPrimaryFile - Return true if we're in the top-level file, not in a 341a5f9000b690d08e65b6b8821e4f7c57d63beb1dJames Dennett/// \#include. This looks through macro expansions and active _Pragma lexers. 358c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::isInPrimaryFile() const { 3681d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer()) 378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return IncludeMacroStack.empty(); 381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 398c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If there are any stacked lexers, we're in a #include. 4081d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek assert(IsFileLexer(IncludeMacroStack[0]) && 418c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Top level include stack isn't our primary lexer?"); 428c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner for (unsigned i = 1, e = IncludeMacroStack.size(); i != e; ++i) 4381d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer(IncludeMacroStack[i])) 448c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return false; 458c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return true; 468c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 478c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 488c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// getCurrentLexer - Return the current file lexer being lexed from. Note 498c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// that this ignores any potentially active macro expansions and _Pragma 508c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// expansions going on at the time. 5168e48e4a81767997ef0231e47eca4f665102c95eTed KremenekPreprocessorLexer *Preprocessor::getCurrentFileLexer() const { 5281d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer()) 5368e48e4a81767997ef0231e47eca4f665102c95eTed Kremenek return CurPPLexer; 541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 558c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Look for a stacked lexer. 568c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner for (unsigned i = IncludeMacroStack.size(); i != 0; --i) { 5768e48e4a81767997ef0231e47eca4f665102c95eTed Kremenek const IncludeStackInfo& ISI = IncludeMacroStack[i-1]; 5881d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer(ISI)) 5968e48e4a81767997ef0231e47eca4f665102c95eTed Kremenek return ISI.ThePPLexer; 608c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 616bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines return nullptr; 628c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 638c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 646b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner 656b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner//===----------------------------------------------------------------------===// 666b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner// Methods for Entering and Callbacks for leaving various contexts 676b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner//===----------------------------------------------------------------------===// 688c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 698c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterSourceFile - Add a source file to the top of the include stack and 70e7f2cbd8c093dcaebaa04c3f7b8fb1a0b4533b15Nuno Lopes/// start lexing tokens from it instead of the current buffer. 71651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesbool Preprocessor::EnterSourceFile(FileID FID, const DirectoryLookup *CurDir, 72e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner SourceLocation Loc) { 737247c88d1e41514a41085f83ebf03dd5220e054aDavid Blaikie assert(!CurTokenLexer && "Cannot #include a file inside a macro!"); 748c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner ++NumEnteredSourceFiles; 751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 768c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (MaxIncludeStackDepth < IncludeMacroStack.size()) 778c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner MaxIncludeStackDepth = IncludeMacroStack.size(); 788c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 796137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (PTH) { 806e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner if (PTHLexer *PL = PTH->CreateLexer(FID)) { 816e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner EnterSourceFileWithPTH(PL, CurDir); 82651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return false; 836e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner } 846137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek } 856e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner 866e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner // Get the MemoryBuffer for this FID, if it fails, we fail. 87aae58b0c3efb5fa9f97a3e4b1c1a2d31077efe5bDouglas Gregor bool Invalid = false; 88e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner const llvm::MemoryBuffer *InputFile = 89e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner getSourceManager().getBuffer(FID, Loc, &Invalid); 90e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner if (Invalid) { 91e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner SourceLocation FileStart = SourceMgr.getLocForStartOfFile(FID); 92e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner Diag(Loc, diag::err_pp_error_opening_file) 93e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner << std::string(SourceMgr.getBufferName(FileStart)) << ""; 94651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return true; 95e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner } 967d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 977d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (isCodeCompletionEnabled() && 987d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis SourceMgr.getFileEntryForID(FID) == CodeCompletionFile) { 997d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CodeCompletionFileLoc = SourceMgr.getLocForStartOfFile(FID); 1007d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CodeCompletionLoc = 101a64ccefdf0ea4e03ec88805d71b0af74950c7472Argyrios Kyrtzidis CodeCompletionFileLoc.getLocWithOffset(CodeCompletionOffset); 1027d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 1037d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 1046e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner EnterSourceFileWithLexer(new Lexer(FID, InputFile, *this), CurDir); 105651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return false; 1061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 107721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner 1086137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// EnterSourceFileWithLexer - Add a source file to the top of the include stack 1096137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// and start lexing tokens from it instead of the current buffer. 1101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::EnterSourceFileWithLexer(Lexer *TheLexer, 1118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner const DirectoryLookup *CurDir) { 1121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1138c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Add the current lexer to the include stack. 11441938c8493b4380df738263166b746eacb33c309Ted Kremenek if (CurPPLexer || CurTokenLexer) 115ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PushIncludeMacroStack(); 116ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek 117caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurLexer.reset(TheLexer); 1189c1b750c59d510e6c9eccb1f37bccc46ccfe6844Ted Kremenek CurPPLexer = TheLexer; 1198c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner CurDirLookup = CurDir; 1206bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CurSubmodule = nullptr; 121b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 122b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_Lexer; 123b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor 1248c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Notify the client, if desired, that we are in a new source file. 1258c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (Callbacks && !CurLexer->Is_PragmaLexer) { 1269d72851fec9e9c62570a027d42701562bbf29751Chris Lattner SrcMgr::CharacteristicKind FileType = 1270b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner SourceMgr.getFileCharacteristic(CurLexer->getFileLoc()); 1281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner Callbacks->FileChanged(CurLexer->getFileLoc(), 1308c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner PPCallbacks::EnterFile, FileType); 1318c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 1328c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 1338c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1346137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// EnterSourceFileWithPTH - Add a source file to the top of the include stack 1356137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// and start getting tokens from it using the PTH cache. 1361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::EnterSourceFileWithPTH(PTHLexer *PL, 1376137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek const DirectoryLookup *CurDir) { 1381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1396137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (CurPPLexer || CurTokenLexer) 1406137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek PushIncludeMacroStack(); 1418c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1426137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurDirLookup = CurDir; 1436137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurPTHLexer.reset(PL); 1446137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurPPLexer = CurPTHLexer.get(); 1456bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CurSubmodule = nullptr; 146b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 147b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_PTHLexer; 148b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor 1496137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek // Notify the client, if desired, that we are in a new source file. 1506137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (Callbacks) { 1512b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = CurPPLexer->getFileID(); 1528c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceLocation EnterLoc = SourceMgr.getLocForStartOfFile(FID); 1538c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SrcMgr::CharacteristicKind FileType = 1548c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceMgr.getFileCharacteristic(EnterLoc); 1558c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner Callbacks->FileChanged(EnterLoc, PPCallbacks::EnterFile, FileType); 1566137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek } 1576137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek} 1588c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1598c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterMacro - Add a Macro to the top of the include stack and start lexing 1608c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// tokens from it instead of the current buffer. 161e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattnervoid Preprocessor::EnterMacro(Token &Tok, SourceLocation ILEnd, 162c30981a563a8947cb26b1e308d122fa2ef90fcebRichard Smith MacroInfo *Macro, MacroArgs *Args) { 163176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines std::unique_ptr<TokenLexer> TokLexer; 1648c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == 0) { 165176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines TokLexer = llvm::make_unique<TokenLexer>(Tok, ILEnd, Macro, Args, *this); 1668c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } else { 167176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines TokLexer = std::move(TokenLexerCache[--NumCachedTokenLexers]); 168bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis TokLexer->Init(Tok, ILEnd, Macro, Args); 1698c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 170bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis 171bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis PushIncludeMacroStack(); 1726bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CurDirLookup = nullptr; 173176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines CurTokenLexer = std::move(TokLexer); 174b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 175b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_TokenLexer; 1768c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 1778c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1788c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterTokenStream - Add a "macro" context to the top of the include stack, 1796b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// which will cause the lexer to start returning the specified tokens. 1806b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1816b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If DisableMacroExpansion is true, tokens lexed from the token stream will 1826b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// not be subject to further macro expansion. Otherwise, these tokens will 1836b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// be re-macro-expanded when/if expansion is enabled. 1846b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1856b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If OwnsTokens is false, this method assumes that the specified stream of 1866b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// tokens has a permanent owner somewhere, so they do not need to be copied. 1876b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If it is true, it assumes the array of tokens is allocated with new[] and 1886b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// must be freed. 1896b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1906b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattnervoid Preprocessor::EnterTokenStream(const Token *Toks, unsigned NumToks, 1916b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner bool DisableMacroExpansion, 1926b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner bool OwnsTokens) { 193176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines if (CurLexerKind == CLK_CachingLexer) { 194176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines if (CachedLexPos < CachedTokens.size()) { 195176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines // We're entering tokens into the middle of our cached token stream. We 196176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines // can't represent that, so just insert the tokens into the buffer. 197176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines CachedTokens.insert(CachedTokens.begin() + CachedLexPos, 198176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines Toks, Toks + NumToks); 199176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines if (OwnsTokens) 200176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines delete [] Toks; 201176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines return; 202176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines } 203176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines 204176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines // New tokens are at the end of the cached token sequnece; insert the 205176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines // token stream underneath the caching lexer. 206176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines ExitCachingLexMode(); 207176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines EnterTokenStream(Toks, NumToks, DisableMacroExpansion, OwnsTokens); 208176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines EnterCachingLexMode(); 209176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines return; 210176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines } 211176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines 2128c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Create a macro expander to expand from the specified token stream. 213176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines std::unique_ptr<TokenLexer> TokLexer; 2148c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == 0) { 215176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines TokLexer = llvm::make_unique<TokenLexer>( 216176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines Toks, NumToks, DisableMacroExpansion, OwnsTokens, *this); 2178c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } else { 218176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines TokLexer = std::move(TokenLexerCache[--NumCachedTokenLexers]); 219bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis TokLexer->Init(Toks, NumToks, DisableMacroExpansion, OwnsTokens); 2208c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 221bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis 222bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // Save our current state. 223bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis PushIncludeMacroStack(); 2246bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CurDirLookup = nullptr; 225176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines CurTokenLexer = std::move(TokLexer); 226b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 227b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_TokenLexer; 2288c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 2298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 230585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor/// \brief Compute the relative path that names the given file relative to 231585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor/// the given directory. 232585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregorstatic void computeRelativePath(FileManager &FM, const DirectoryEntry *Dir, 233585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor const FileEntry *File, 234f7ccbad5d9949e7ddd1cbef43d482553b811e026Dylan Noblesmith SmallString<128> &Result) { 235585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Result.clear(); 236585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 237585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor StringRef FilePath = File->getDir()->getName(); 238585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor StringRef Path = FilePath; 239585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor while (!Path.empty()) { 240585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (const DirectoryEntry *CurDir = FM.getDirectory(Path)) { 241585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (CurDir == Dir) { 242585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Result = FilePath.substr(Path.size()); 243585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor llvm::sys::path::append(Result, 244585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor llvm::sys::path::filename(File->getName())); 245585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor return; 246585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 247585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 248585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 249585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Path = llvm::sys::path::parent_path(Path); 250585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 251585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 252585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Result = File->getName(); 253585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor} 254585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 255d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedmanvoid Preprocessor::PropagateLineStartLeadingSpaceInfo(Token &Result) { 256d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman if (CurTokenLexer) { 257d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman CurTokenLexer->PropagateLineStartLeadingSpaceInfo(Result); 258d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman return; 259d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman } 260d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman if (CurLexer) { 261d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman CurLexer->PropagateLineStartLeadingSpaceInfo(Result); 262d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman return; 263d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman } 264d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman // FIXME: Handle other kinds of lexers? It generally shouldn't matter, 265d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman // but it might if they're empty? 266d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman} 267d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman 268651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/// \brief Determine the location to use as the end of the buffer for a lexer. 269651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/// 270651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/// If the file ends with a newline, form the EOF token on the newline itself, 271651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/// rather than "on the line following it", which doesn't exist. This makes 272651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/// diagnostics relating to the end of file include the last file that the user 273651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines/// actually typed, which is goodness. 274651f13cea278ec967336033dd032faef0e9fc2ecStephen Hinesconst char *Preprocessor::getCurLexerEndPos() { 275651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const char *EndPos = CurLexer->BufferEnd; 276651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (EndPos != CurLexer->BufferStart && 277651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines (EndPos[-1] == '\n' || EndPos[-1] == '\r')) { 278651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines --EndPos; 279651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 280651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Handle \n\r and \r\n: 281651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (EndPos != CurLexer->BufferStart && 282651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines (EndPos[-1] == '\n' || EndPos[-1] == '\r') && 283651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines EndPos[-1] != EndPos[0]) 284651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines --EndPos; 285651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 286651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 287651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return EndPos; 288651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines} 289651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 290651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 2918c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleEndOfFile - This callback is invoked when the lexer hits the end of 2928c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// the current file. This either returns the EOF token or pops a level off 2938c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// the include stack and keeps going. 2948c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::HandleEndOfFile(Token &Result, bool isEndOfMacro) { 2958c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(!CurTokenLexer && 2968c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Ending a file when currently in a macro!"); 2971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2988c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // See if this file had a controlling macro. 2991a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (CurPPLexer) { // Not ending a macro, ignore it. 3001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const IdentifierInfo *ControllingMacro = 3011a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurPPLexer->MIOpt.GetControllingMacroAtEndOfFile()) { 30283d63c78810556d26b62ac4cbae2eda6cdd2570cSteve Naroff // Okay, this has a controlling macro, remember in HeaderFileInfo. 3031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const FileEntry *FE = 304671538e8a51eab5bd65a1f9f327ba7f44f84e486Richard Trieu SourceMgr.getFileEntryForID(CurPPLexer->getFileID())) { 3058c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner HeaderInfo.SetFileControllingMacro(FE, ControllingMacro); 3066bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (MacroInfo *MI = 3076bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines getMacroInfo(const_cast<IdentifierInfo*>(ControllingMacro))) { 3086bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines MI->UsedForHeaderGuard = true; 3096bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines } 310671538e8a51eab5bd65a1f9f327ba7f44f84e486Richard Trieu if (const IdentifierInfo *DefinedMacro = 311671538e8a51eab5bd65a1f9f327ba7f44f84e486Richard Trieu CurPPLexer->MIOpt.GetDefinedMacro()) { 312671538e8a51eab5bd65a1f9f327ba7f44f84e486Richard Trieu if (!ControllingMacro->hasMacroDefinition() && 313671538e8a51eab5bd65a1f9f327ba7f44f84e486Richard Trieu DefinedMacro != ControllingMacro && 314671538e8a51eab5bd65a1f9f327ba7f44f84e486Richard Trieu HeaderInfo.FirstTimeLexingFile(FE)) { 315223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi 316223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi // If the edit distance between the two macros is more than 50%, 317223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi // DefinedMacro may not be header guard, or can be header guard of 318223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi // another header file. Therefore, it maybe defining something 319223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi // completely different. This can be observed in the wild when 320223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi // handling feature macros or header guards in different files. 321223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi 322223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi const StringRef ControllingMacroName = ControllingMacro->getName(); 323223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi const StringRef DefinedMacroName = DefinedMacro->getName(); 324223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi const size_t MaxHalfLength = std::max(ControllingMacroName.size(), 325223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi DefinedMacroName.size()) / 2; 326223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi const unsigned ED = ControllingMacroName.edit_distance( 327223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi DefinedMacroName, true, MaxHalfLength); 328223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi if (ED <= MaxHalfLength) { 329223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi // Emit a warning for a bad header guard. 330223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi Diag(CurPPLexer->MIOpt.GetMacroLocation(), 331223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi diag::warn_header_guard) 332223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi << CurPPLexer->MIOpt.GetMacroLocation() << ControllingMacro; 333223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi Diag(CurPPLexer->MIOpt.GetDefinedLocation(), 334223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi diag::note_header_guard) 335223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi << CurPPLexer->MIOpt.GetDefinedLocation() << DefinedMacro 336223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi << ControllingMacro 337223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi << FixItHint::CreateReplacement( 338223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi CurPPLexer->MIOpt.GetDefinedLocation(), 339223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi ControllingMacro->getName()); 340223e7a8b0fadbbc9eaea1fb460cd90c8d9c8dd28Ismail Pazarbasi } 341671538e8a51eab5bd65a1f9f327ba7f44f84e486Richard Trieu } 342671538e8a51eab5bd65a1f9f327ba7f44f84e486Richard Trieu } 343671538e8a51eab5bd65a1f9f327ba7f44f84e486Richard Trieu } 3448c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 3458c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 3461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3473eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // Complain about reaching a true EOF within arc_cf_code_audited. 3483eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // We don't want to complain about reaching the end of a macro 3493eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // instantiation or a _Pragma. 3503eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall if (PragmaARCCFCodeAuditedLoc.isValid() && 351d80d90d65895a2004b0d01c67ac417cde6cc62fdJohn McCall !isEndOfMacro && !(CurLexer && CurLexer->Is_PragmaLexer)) { 3528dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall Diag(PragmaARCCFCodeAuditedLoc, diag::err_pp_eof_in_arc_cf_code_audited); 3538dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall 3548dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall // Recover by leaving immediately. 3558dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall PragmaARCCFCodeAuditedLoc = SourceLocation(); 3568dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall } 3578dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall 3588c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If this is a #include'd file, pop it off the include stack and continue 3598c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // lexing the #includer file. 3608c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (!IncludeMacroStack.empty()) { 3617d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 3627d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis // If we lexed the code-completion file, act as if we reached EOF. 3637d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (isCodeCompletionEnabled() && CurPPLexer && 3647d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis SourceMgr.getLocForStartOfFile(CurPPLexer->getFileID()) == 3657d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CodeCompletionFileLoc) { 3667d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (CurLexer) { 3677d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis Result.startToken(); 3687d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurLexer->FormTokenWithChars(Result, CurLexer->BufferEnd, tok::eof); 3697d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurLexer.reset(); 3707d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } else { 3717d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis assert(CurPTHLexer && "Got EOF but no current lexer set!"); 3727d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPTHLexer->getEOF(Result); 3737d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPTHLexer.reset(); 3747d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 3757d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 3766bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CurPPLexer = nullptr; 3777d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis return true; 3787d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 3797d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 380d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis if (!isEndOfMacro && CurPPLexer && 381d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.getIncludeLoc(CurPPLexer->getFileID()).isValid()) { 382d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis // Notify SourceManager to record the number of FileIDs that were created 383d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis // during lexing of the #include'd file. 384d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis unsigned NumFIDs = 385d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.local_sloc_entry_size() - 386d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis CurPPLexer->getInitialNumSLocEntries() + 1/*#include'd file*/; 387d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.setNumCreatedFIDsForFileID(CurPPLexer->getFileID(), NumFIDs); 388d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis } 389d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis 390c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis FileID ExitedFID; 391c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis if (Callbacks && !isEndOfMacro && CurPPLexer) 392c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis ExitedFID = CurPPLexer->getFileID(); 393651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 394651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines bool LeavingSubmodule = CurSubmodule && CurLexer; 395651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (LeavingSubmodule) { 396651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Notify the parser that we've left the module. 397651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const char *EndPos = getCurLexerEndPos(); 398651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Result.startToken(); 399651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CurLexer->BufferPtr = EndPos; 400651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines CurLexer->FormTokenWithChars(Result, EndPos, tok::annot_module_end); 401651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Result.setAnnotationEndLoc(Result.getLocation()); 402651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Result.setAnnotationValue(CurSubmodule); 403651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 404651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 4058c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // We're done with the #included file. 4068c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner RemoveTopOfLexerStack(); 4078c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 408d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman // Propagate info about start-of-line/leading white-space/etc. 409d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman PropagateLineStartLeadingSpaceInfo(Result); 410d2f9308220af22bfc1bcd3bc2cad118dbd8be013Eli Friedman 4118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Notify the client, if desired, that we are in a new source file. 4121a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (Callbacks && !isEndOfMacro && CurPPLexer) { 4139d72851fec9e9c62570a027d42701562bbf29751Chris Lattner SrcMgr::CharacteristicKind FileType = 4148c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceMgr.getFileCharacteristic(CurPPLexer->getSourceLocation()); 4158c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner Callbacks->FileChanged(CurPPLexer->getSourceLocation(), 416c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis PPCallbacks::ExitFile, FileType, ExitedFID); 4178c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 4188c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 419651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // Client should lex another token unless we generated an EOM. 420651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines return LeavingSubmodule; 4218c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 4228c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 423651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // If this is the end of the main file, form an EOF token. 4241a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (CurLexer) { 425651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const char *EndPos = getCurLexerEndPos(); 4261a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek Result.startToken(); 4271a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurLexer->BufferPtr = EndPos; 4281a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurLexer->FormTokenWithChars(Result, EndPos, tok::eof); 4291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 430bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis if (isCodeCompletionEnabled()) { 431bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // Inserting the code-completion point increases the source buffer by 1, 432bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // but the main FileID was created before inserting the point. 433bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // Compensate by reducing the EOF location by 1, otherwise the location 434bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // will point to the next FileID. 435bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // FIXME: This is hacky, the code-completion point should probably be 436bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis // inserted before the main FileID is created. 437bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis if (CurLexer->getFileLoc() == CodeCompletionFileLoc) 438bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis Result.setLocation(Result.getLocation().getLocWithOffset(-1)); 439bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis } 440bb06b5000b9639a92e92c368ff3e5e5f8bb1e724Argyrios Kyrtzidis 441e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann if (!isIncrementalProcessingEnabled()) 442e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann // We're done with lexing. 443e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann CurLexer.reset(); 44467116083e70ad44799808c7472d9cd9e7e21d4d5Chris Lattner } else { 44567116083e70ad44799808c7472d9cd9e7e21d4d5Chris Lattner assert(CurPTHLexer && "Got EOF but no current lexer set!"); 44659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek CurPTHLexer->getEOF(Result); 4471a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurPTHLexer.reset(); 4488c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 449e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann 450e55329d6834647ba0e06f8a319e5d84c77310035Axel Naumann if (!isIncrementalProcessingEnabled()) 4516bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines CurPPLexer = nullptr; 4528c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 453651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (TUKind == TU_Complete) { 454651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // This is the end of the top-level file. 'WarnUnusedMacroLocs' has 455651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // collected all macro locations that we need to warn because they are not 456651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines // used. 457651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines for (WarnUnusedMacroLocsTy::iterator 458651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines I=WarnUnusedMacroLocs.begin(), E=WarnUnusedMacroLocs.end(); 459651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines I!=E; ++I) 460651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines Diag(*I, diag::pp_macro_not_used); 461651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines } 462dbd8209b33e6c9f151e4913a9c095d64a95439c4Daniel Dunbar 463585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // If we are building a module that has an umbrella header, make sure that 464585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // each of the headers within the directory covered by the umbrella header 465585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // was actually included by the umbrella header. 466585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (Module *Mod = getCurrentModule()) { 467585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (Mod->getUmbrellaHeader()) { 468585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor SourceLocation StartLoc 469585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor = SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID()); 470585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 471c568f1e98938584c0ef0b12ae5018ff7d90a4072Stephen Hines if (!getDiagnostics().isIgnored(diag::warn_uncovered_module_header, 472c568f1e98938584c0ef0b12ae5018ff7d90a4072Stephen Hines StartLoc)) { 47351f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor ModuleMap &ModMap = getHeaderSearchInfo().getModuleMap(); 474585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor const DirectoryEntry *Dir = Mod->getUmbrellaDir(); 475c568f1e98938584c0ef0b12ae5018ff7d90a4072Stephen Hines vfs::FileSystem &FS = *FileMgr.getVirtualFileSystem(); 476c568f1e98938584c0ef0b12ae5018ff7d90a4072Stephen Hines std::error_code EC; 477c568f1e98938584c0ef0b12ae5018ff7d90a4072Stephen Hines for (vfs::recursive_directory_iterator Entry(FS, Dir->getName(), EC), End; 478585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Entry != End && !EC; Entry.increment(EC)) { 479585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor using llvm::StringSwitch; 480585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 48151f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor // Check whether this entry has an extension typically associated with 482585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // headers. 483c568f1e98938584c0ef0b12ae5018ff7d90a4072Stephen Hines if (!StringSwitch<bool>(llvm::sys::path::extension(Entry->getName())) 48451f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor .Cases(".h", ".H", ".hh", ".hpp", true) 48551f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor .Default(false)) 486585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor continue; 487585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 488c568f1e98938584c0ef0b12ae5018ff7d90a4072Stephen Hines if (const FileEntry *Header = 489c568f1e98938584c0ef0b12ae5018ff7d90a4072Stephen Hines getFileManager().getFile(Entry->getName())) 490585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (!getSourceManager().hasFileInfo(Header)) { 49151f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor if (!ModMap.isHeaderInUnavailableModule(Header)) { 49251f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor // Find the relative path that would access this header. 493f7ccbad5d9949e7ddd1cbef43d482553b811e026Dylan Noblesmith SmallString<128> RelativePath; 49451f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor computeRelativePath(FileMgr, Dir, Header, RelativePath); 49551f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor Diag(StartLoc, diag::warn_uncovered_module_header) 496c9c3907e66659e4457593fdec4a27c671c12e041Douglas Gregor << Mod->getFullModuleName() << RelativePath; 49751f564f80d9f71e175635b452ffeeeff899e9bf1Douglas Gregor } 498585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 499585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 500585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 501585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 502585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 50358ea48dc1dd970f131207e00ae7ece159d1a08edDouglas Gregor 5048c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return true; 5058c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 5068c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 5078c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleEndOfTokenLexer - This callback is invoked when the current TokenLexer 5088c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// hits the end of its token stream. 5098c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::HandleEndOfTokenLexer(Token &Result) { 5101a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek assert(CurTokenLexer && !CurPPLexer && 5118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Ending a macro when currently in a #include file!"); 5128c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 5135b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis if (!MacroExpandingLexersStack.empty() && 5145b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis MacroExpandingLexersStack.back().first == CurTokenLexer.get()) 5155b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis removeCachedMacroExpandedTokensOfLastLexer(); 5165b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis 5178c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Delete or cache the now-dead macro expander. 5188c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == TokenLexerCacheSize) 519caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(); 5208c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner else 521176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines TokenLexerCache[NumCachedTokenLexers++] = std::move(CurTokenLexer); 5228c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 5238c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Handle this like a #include file being popped off the stack. 5248c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return HandleEndOfFile(Result, true); 5258c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 5268c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 5278c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// RemoveTopOfLexerStack - Pop the current lexer/macro exp off the top of the 5288c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// lexer stack. This should only be used in situations where the current 5298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// state of the top-of-stack lexer is unknown. 5308c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnervoid Preprocessor::RemoveTopOfLexerStack() { 5318c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(!IncludeMacroStack.empty() && "Ran out of stack entries to load"); 5321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5338c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (CurTokenLexer) { 5348c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Delete or cache the now-dead macro expander. 5358c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == TokenLexerCacheSize) 536caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(); 5378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner else 538176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines TokenLexerCache[NumCachedTokenLexers++] = std::move(CurTokenLexer); 5391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 5401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 541ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PopIncludeMacroStack(); 5428c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 5438c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 5448c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleMicrosoftCommentPaste - When the macro expander pastes together a 5458c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// comment (/##/) in microsoft mode, this method handles updating the current 5468c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// state, returning the token on the next source line. 5478c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnervoid Preprocessor::HandleMicrosoftCommentPaste(Token &Tok) { 5481a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek assert(CurTokenLexer && !CurPPLexer && 5498c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Pasted comment can only be formed from macro"); 5501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5518c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // We handle this by scanning for the closest real lexer, switching it to 5528c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // raw mode and preprocessor mode. This will cause it to return \n as an 55384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // explicit EOD token. 5546bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines PreprocessorLexer *FoundLexer = nullptr; 5558c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner bool LexerWasInPPMode = false; 5568c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner for (unsigned i = 0, e = IncludeMacroStack.size(); i != e; ++i) { 5578c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner IncludeStackInfo &ISI = *(IncludeMacroStack.end()-i-1); 5586bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines if (ISI.ThePPLexer == nullptr) continue; // Scan for a real lexer. 5591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5608c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Once we find a real lexer, mark it as raw mode (disabling macro 56184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // expansions) and preprocessor mode (return EOD). We know that the lexer 5628c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // was *not* in raw mode before, because the macro that the comment came 5638c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // from was expanded. However, it could have already been in preprocessor 5648c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // mode (#if COMMENT) in which case we have to return it to that mode and 56584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // return EOD. 5661a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek FoundLexer = ISI.ThePPLexer; 5678c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->LexingRawMode = true; 5688c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner LexerWasInPPMode = FoundLexer->ParsingPreprocessorDirective; 5698c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->ParsingPreprocessorDirective = true; 5708c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner break; 5718c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 5721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5738c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Okay, we either found and switched over the lexer, or we didn't find a 5748c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // lexer. In either case, finish off the macro the comment came from, getting 5758c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // the next token. 5768c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (!HandleEndOfTokenLexer(Tok)) Lex(Tok); 5771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 57884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Discarding comments as long as we don't have EOF or EOD. This 'comments 5798c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // out' the rest of the line, including any tokens that came from other macros 5808c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // that were active, as in: 5818c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // #define submacro a COMMENT b 5828c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // submacro c 5838c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // which should lex to 'a' only: 'b' and 'c' should be removed. 58484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (Tok.isNot(tok::eod) && Tok.isNot(tok::eof)) 5858c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner Lex(Tok); 5861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 58784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If we got an eod token, then we successfully found the end of the line. 58884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.is(tok::eod)) { 5898c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(FoundLexer && "Can't get end of line without an active lexer"); 5908c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Restore the lexer back to normal mode instead of raw mode. 5918c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->LexingRawMode = false; 5921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 59384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the lexer was already in preprocessor mode, just return the EOD token 5948c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // to finish the preprocessor line. 5958c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (LexerWasInPPMode) return; 5961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5978c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Otherwise, switch out of PP mode and return the next lexed token. 5988c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->ParsingPreprocessorDirective = false; 5998c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return Lex(Tok); 6008c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 6011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6028c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If we got an EOF token, then we reached the end of the token stream but 6038c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // didn't find an explicit \n. This can only happen if there was no lexer 60484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // active (an active lexer would return EOD at EOF if there was no \n in 6058c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // preprocessor directive mode), so just return EOF as our token. 60684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne assert(!FoundLexer && "Lexer should return EOD before EOF in PP mode"); 6078c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 608