PPLexerChange.cpp revision 3eff3214647fe25e80dbf1dd096cc73a11d9a77a
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" 168c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner#include "clang/Lex/HeaderSearch.h" 178c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner#include "clang/Lex/MacroInfo.h" 18500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/Lex/LexDiagnostic.h" 19aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor#include "clang/Basic/FileManager.h" 208c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner#include "clang/Basic/SourceManager.h" 2115ba2af0f9ad52e67e908179b8ec2eb404e11c61Ted Kremenek#include "llvm/Support/MemoryBuffer.h" 228c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerusing namespace clang; 238c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 244b391087f9c5582d448ab66ccbc7028f7673f380Ted KremenekPPCallbacks::~PPCallbacks() {} 258c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 268c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===----------------------------------------------------------------------===// 276b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner// Miscellaneous Methods. 288c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner//===----------------------------------------------------------------------===// 298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 308c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// isInPrimaryFile - Return true if we're in the top-level file, not in a 317d39d742383ade80c9d937729bfc539c6c978845Chris Lattner/// #include. This looks through macro expansions and active _Pragma lexers. 328c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::isInPrimaryFile() const { 3381d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer()) 348c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return IncludeMacroStack.empty(); 351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 368c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If there are any stacked lexers, we're in a #include. 3781d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek assert(IsFileLexer(IncludeMacroStack[0]) && 388c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Top level include stack isn't our primary lexer?"); 398c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner for (unsigned i = 1, e = IncludeMacroStack.size(); i != e; ++i) 4081d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer(IncludeMacroStack[i])) 418c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return false; 428c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return true; 438c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 448c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 458c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// getCurrentLexer - Return the current file lexer being lexed from. Note 468c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// that this ignores any potentially active macro expansions and _Pragma 478c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// expansions going on at the time. 4868e48e4a81767997ef0231e47eca4f665102c95eTed KremenekPreprocessorLexer *Preprocessor::getCurrentFileLexer() const { 4981d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer()) 5068e48e4a81767997ef0231e47eca4f665102c95eTed Kremenek return CurPPLexer; 511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 528c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Look for a stacked lexer. 538c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner for (unsigned i = IncludeMacroStack.size(); i != 0; --i) { 5468e48e4a81767997ef0231e47eca4f665102c95eTed Kremenek const IncludeStackInfo& ISI = IncludeMacroStack[i-1]; 5581d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer(ISI)) 5668e48e4a81767997ef0231e47eca4f665102c95eTed Kremenek return ISI.ThePPLexer; 578c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 588c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return 0; 598c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 608c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 616b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner 626b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner//===----------------------------------------------------------------------===// 636b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner// Methods for Entering and Callbacks for leaving various contexts 646b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner//===----------------------------------------------------------------------===// 658c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 668c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterSourceFile - Add a source file to the top of the include stack and 67e7f2cbd8c093dcaebaa04c3f7b8fb1a0b4533b15Nuno Lopes/// start lexing tokens from it instead of the current buffer. 68e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattnervoid Preprocessor::EnterSourceFile(FileID FID, const DirectoryLookup *CurDir, 69e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner SourceLocation Loc) { 708c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(CurTokenLexer == 0 && "Cannot #include a file inside a macro!"); 718c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner ++NumEnteredSourceFiles; 721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 738c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (MaxIncludeStackDepth < IncludeMacroStack.size()) 748c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner MaxIncludeStackDepth = IncludeMacroStack.size(); 758c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 766137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (PTH) { 776e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner if (PTHLexer *PL = PTH->CreateLexer(FID)) { 786e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner EnterSourceFileWithPTH(PL, CurDir); 79e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner return; 806e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner } 816137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek } 826e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner 836e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner // Get the MemoryBuffer for this FID, if it fails, we fail. 84aae58b0c3efb5fa9f97a3e4b1c1a2d31077efe5bDouglas Gregor bool Invalid = false; 85e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner const llvm::MemoryBuffer *InputFile = 86e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner getSourceManager().getBuffer(FID, Loc, &Invalid); 87e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner if (Invalid) { 88e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner SourceLocation FileStart = SourceMgr.getLocForStartOfFile(FID); 89e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner Diag(Loc, diag::err_pp_error_opening_file) 90e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner << std::string(SourceMgr.getBufferName(FileStart)) << ""; 91e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner return; 92e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner } 937d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 947d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (isCodeCompletionEnabled() && 957d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis SourceMgr.getFileEntryForID(FID) == CodeCompletionFile) { 967d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CodeCompletionFileLoc = SourceMgr.getLocForStartOfFile(FID); 977d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CodeCompletionLoc = 98a64ccefdf0ea4e03ec88805d71b0af74950c7472Argyrios Kyrtzidis CodeCompletionFileLoc.getLocWithOffset(CodeCompletionOffset); 997d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 1007d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 1016e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner EnterSourceFileWithLexer(new Lexer(FID, InputFile, *this), CurDir); 102e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner return; 1031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 104721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner 1056137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// EnterSourceFileWithLexer - Add a source file to the top of the include stack 1066137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// and start lexing tokens from it instead of the current buffer. 1071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::EnterSourceFileWithLexer(Lexer *TheLexer, 1088c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner const DirectoryLookup *CurDir) { 1091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1108c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Add the current lexer to the include stack. 11141938c8493b4380df738263166b746eacb33c309Ted Kremenek if (CurPPLexer || CurTokenLexer) 112ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PushIncludeMacroStack(); 113ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek 114caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurLexer.reset(TheLexer); 1159c1b750c59d510e6c9eccb1f37bccc46ccfe6844Ted Kremenek CurPPLexer = TheLexer; 1168c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner CurDirLookup = CurDir; 117b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 118b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_Lexer; 119b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor 1208c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Notify the client, if desired, that we are in a new source file. 1218c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (Callbacks && !CurLexer->Is_PragmaLexer) { 1229d72851fec9e9c62570a027d42701562bbf29751Chris Lattner SrcMgr::CharacteristicKind FileType = 1230b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner SourceMgr.getFileCharacteristic(CurLexer->getFileLoc()); 1241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1258c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner Callbacks->FileChanged(CurLexer->getFileLoc(), 1268c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner PPCallbacks::EnterFile, FileType); 1278c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 1288c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 1298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1306137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// EnterSourceFileWithPTH - Add a source file to the top of the include stack 1316137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// and start getting tokens from it using the PTH cache. 1321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::EnterSourceFileWithPTH(PTHLexer *PL, 1336137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek const DirectoryLookup *CurDir) { 1341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1356137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (CurPPLexer || CurTokenLexer) 1366137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek PushIncludeMacroStack(); 1378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1386137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurDirLookup = CurDir; 1396137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurPTHLexer.reset(PL); 1406137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurPPLexer = CurPTHLexer.get(); 141b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 142b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_PTHLexer; 143b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor 1446137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek // Notify the client, if desired, that we are in a new source file. 1456137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (Callbacks) { 1462b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = CurPPLexer->getFileID(); 1478c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceLocation EnterLoc = SourceMgr.getLocForStartOfFile(FID); 1488c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SrcMgr::CharacteristicKind FileType = 1498c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceMgr.getFileCharacteristic(EnterLoc); 1508c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner Callbacks->FileChanged(EnterLoc, PPCallbacks::EnterFile, FileType); 1516137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek } 1526137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek} 1538c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1548c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterMacro - Add a Macro to the top of the include stack and start lexing 1558c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// tokens from it instead of the current buffer. 156e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattnervoid Preprocessor::EnterMacro(Token &Tok, SourceLocation ILEnd, 157e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner MacroArgs *Args) { 158ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PushIncludeMacroStack(); 1598c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner CurDirLookup = 0; 1601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1618c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == 0) { 162e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner CurTokenLexer.reset(new TokenLexer(Tok, ILEnd, Args, *this)); 1638c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } else { 164caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(TokenLexerCache[--NumCachedTokenLexers]); 165e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner CurTokenLexer->Init(Tok, ILEnd, Args); 1668c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 167b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 168b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_TokenLexer; 1698c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 1708c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1718c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterTokenStream - Add a "macro" context to the top of the include stack, 1726b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// which will cause the lexer to start returning the specified tokens. 1736b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1746b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If DisableMacroExpansion is true, tokens lexed from the token stream will 1756b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// not be subject to further macro expansion. Otherwise, these tokens will 1766b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// be re-macro-expanded when/if expansion is enabled. 1776b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1786b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If OwnsTokens is false, this method assumes that the specified stream of 1796b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// tokens has a permanent owner somewhere, so they do not need to be copied. 1806b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If it is true, it assumes the array of tokens is allocated with new[] and 1816b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// must be freed. 1826b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1836b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattnervoid Preprocessor::EnterTokenStream(const Token *Toks, unsigned NumToks, 1846b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner bool DisableMacroExpansion, 1856b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner bool OwnsTokens) { 1868c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Save our current state. 187ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PushIncludeMacroStack(); 1888c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner CurDirLookup = 0; 1898c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1908c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Create a macro expander to expand from the specified token stream. 1918c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == 0) { 192caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(new TokenLexer(Toks, NumToks, DisableMacroExpansion, 193caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek OwnsTokens, *this)); 1948c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } else { 195caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(TokenLexerCache[--NumCachedTokenLexers]); 1966b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner CurTokenLexer->Init(Toks, NumToks, DisableMacroExpansion, OwnsTokens); 1978c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 198b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 199b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_TokenLexer; 2008c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 2018c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 2028c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleEndOfFile - This callback is invoked when the lexer hits the end of 2038c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// the current file. This either returns the EOF token or pops a level off 2048c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// the include stack and keeps going. 2058c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::HandleEndOfFile(Token &Result, bool isEndOfMacro) { 2068c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(!CurTokenLexer && 2078c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Ending a file when currently in a macro!"); 2081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2098c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // See if this file had a controlling macro. 2101a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (CurPPLexer) { // Not ending a macro, ignore it. 2111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const IdentifierInfo *ControllingMacro = 2121a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurPPLexer->MIOpt.GetControllingMacroAtEndOfFile()) { 21383d63c78810556d26b62ac4cbae2eda6cdd2570cSteve Naroff // Okay, this has a controlling macro, remember in HeaderFileInfo. 2141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const FileEntry *FE = 215aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor SourceMgr.getFileEntryForID(CurPPLexer->getFileID())) { 2168c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner HeaderInfo.SetFileControllingMacro(FE, ControllingMacro); 217aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor 218aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // Controlling macros are implicitly private. 219aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor if (MacroInfo *MI = getMacroInfo( 220aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor const_cast<IdentifierInfo *>(ControllingMacro))) { 221aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor if (MI->getVisibilityLocation().isInvalid()) { 222aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // FIXME: HACK! Mark controlling macros from system headers as 223aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // exported, along with our own Clang headers. This is a gross 224aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // hack to deal with the fact that system headers are included in 225aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // many places within module headers, but are not themselves 226aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // modularized. 227aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor if ((StringRef(FE->getName()).find("lib/clang") 228aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor == StringRef::npos) && 229aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor (StringRef(FE->getName()).find("usr/include") 230aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor == StringRef::npos) && 231aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor (StringRef(FE->getName()).find("usr/local/include") 232aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor == StringRef::npos)) 233aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor MI->setVisibility(false, SourceLocation()); 234aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor } 235aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor } 236aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor } 2378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 2388c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 2391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2403eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // Complain about reaching a true EOF within arc_cf_code_audited. 2413eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // We don't want to complain about reaching the end of a macro 2423eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // instantiation or a _Pragma. 2433eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall if (PragmaARCCFCodeAuditedLoc.isValid() && 2443eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall !isEndOfMacro && CurLexer && !CurLexer->Is_PragmaLexer) { 2458dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall Diag(PragmaARCCFCodeAuditedLoc, diag::err_pp_eof_in_arc_cf_code_audited); 2468dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall 2478dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall // Recover by leaving immediately. 2488dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall PragmaARCCFCodeAuditedLoc = SourceLocation(); 2498dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall } 2508dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall 2518c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If this is a #include'd file, pop it off the include stack and continue 2528c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // lexing the #includer file. 2538c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (!IncludeMacroStack.empty()) { 2547d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 2557d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis // If we lexed the code-completion file, act as if we reached EOF. 2567d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (isCodeCompletionEnabled() && CurPPLexer && 2577d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis SourceMgr.getLocForStartOfFile(CurPPLexer->getFileID()) == 2587d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CodeCompletionFileLoc) { 2597d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (CurLexer) { 2607d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis Result.startToken(); 2617d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurLexer->FormTokenWithChars(Result, CurLexer->BufferEnd, tok::eof); 2627d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurLexer.reset(); 2637d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } else { 2647d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis assert(CurPTHLexer && "Got EOF but no current lexer set!"); 2657d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPTHLexer->getEOF(Result); 2667d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPTHLexer.reset(); 2677d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 2687d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 2697d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPPLexer = 0; 2707d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis return true; 2717d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 2727d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 273d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis if (!isEndOfMacro && CurPPLexer && 274d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.getIncludeLoc(CurPPLexer->getFileID()).isValid()) { 275d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis // Notify SourceManager to record the number of FileIDs that were created 276d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis // during lexing of the #include'd file. 277d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis unsigned NumFIDs = 278d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.local_sloc_entry_size() - 279d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis CurPPLexer->getInitialNumSLocEntries() + 1/*#include'd file*/; 280d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.setNumCreatedFIDsForFileID(CurPPLexer->getFileID(), NumFIDs); 281d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis } 282d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis 283c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis FileID ExitedFID; 284c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis if (Callbacks && !isEndOfMacro && CurPPLexer) 285c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis ExitedFID = CurPPLexer->getFileID(); 286c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis 2878c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // We're done with the #included file. 2888c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner RemoveTopOfLexerStack(); 2898c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 2908c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Notify the client, if desired, that we are in a new source file. 2911a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (Callbacks && !isEndOfMacro && CurPPLexer) { 2929d72851fec9e9c62570a027d42701562bbf29751Chris Lattner SrcMgr::CharacteristicKind FileType = 2938c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceMgr.getFileCharacteristic(CurPPLexer->getSourceLocation()); 2948c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner Callbacks->FileChanged(CurPPLexer->getSourceLocation(), 295c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis PPCallbacks::ExitFile, FileType, ExitedFID); 2968c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 2978c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 2988c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Client should lex another token. 2998c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return false; 3008c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 3018c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3028c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If the file ends with a newline, form the EOF token on the newline itself, 3038c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // rather than "on the line following it", which doesn't exist. This makes 3048c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // diagnostics relating to the end of file include the last file that the user 3058c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // actually typed, which is goodness. 3061a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (CurLexer) { 3071a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek const char *EndPos = CurLexer->BufferEnd; 3081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (EndPos != CurLexer->BufferStart && 3091a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek (EndPos[-1] == '\n' || EndPos[-1] == '\r')) { 3108c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner --EndPos; 3111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3121a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek // Handle \n\r and \r\n: 3131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (EndPos != CurLexer->BufferStart && 3141a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek (EndPos[-1] == '\n' || EndPos[-1] == '\r') && 3151a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek EndPos[-1] != EndPos[0]) 3161a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek --EndPos; 3171a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek } 3181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3191a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek Result.startToken(); 3201a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurLexer->BufferPtr = EndPos; 3211a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurLexer->FormTokenWithChars(Result, EndPos, tok::eof); 3221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3231a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek // We're done with the #included file. 3241a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurLexer.reset(); 32567116083e70ad44799808c7472d9cd9e7e21d4d5Chris Lattner } else { 32667116083e70ad44799808c7472d9cd9e7e21d4d5Chris Lattner assert(CurPTHLexer && "Got EOF but no current lexer set!"); 32759d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek CurPTHLexer->getEOF(Result); 3281a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurPTHLexer.reset(); 3298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 3301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 33141938c8493b4380df738263166b746eacb33c309Ted Kremenek CurPPLexer = 0; 3328c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3330827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // This is the end of the top-level file. 'WarnUnusedMacroLocs' has collected 3340827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // all macro locations that we need to warn because they are not used. 3350827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis for (WarnUnusedMacroLocsTy::iterator 3360827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis I=WarnUnusedMacroLocs.begin(), E=WarnUnusedMacroLocs.end(); I!=E; ++I) 3370827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis Diag(*I, diag::pp_macro_not_used); 338dbd8209b33e6c9f151e4913a9c095d64a95439c4Daniel Dunbar 3398c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return true; 3408c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 3418c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3428c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleEndOfTokenLexer - This callback is invoked when the current TokenLexer 3438c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// hits the end of its token stream. 3448c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::HandleEndOfTokenLexer(Token &Result) { 3451a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek assert(CurTokenLexer && !CurPPLexer && 3468c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Ending a macro when currently in a #include file!"); 3478c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3485b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis if (!MacroExpandingLexersStack.empty() && 3495b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis MacroExpandingLexersStack.back().first == CurTokenLexer.get()) 3505b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis removeCachedMacroExpandedTokensOfLastLexer(); 3515b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis 3528c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Delete or cache the now-dead macro expander. 3538c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == TokenLexerCacheSize) 354caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(); 3558c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner else 356caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek TokenLexerCache[NumCachedTokenLexers++] = CurTokenLexer.take(); 3578c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3588c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Handle this like a #include file being popped off the stack. 3598c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return HandleEndOfFile(Result, true); 3608c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 3618c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3628c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// RemoveTopOfLexerStack - Pop the current lexer/macro exp off the top of the 3638c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// lexer stack. This should only be used in situations where the current 3648c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// state of the top-of-stack lexer is unknown. 3658c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnervoid Preprocessor::RemoveTopOfLexerStack() { 3668c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(!IncludeMacroStack.empty() && "Ran out of stack entries to load"); 3671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3688c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (CurTokenLexer) { 3698c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Delete or cache the now-dead macro expander. 3708c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == TokenLexerCacheSize) 371caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(); 3728c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner else 373caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek TokenLexerCache[NumCachedTokenLexers++] = CurTokenLexer.take(); 3741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 3751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 376ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PopIncludeMacroStack(); 3778c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 3788c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3798c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleMicrosoftCommentPaste - When the macro expander pastes together a 3808c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// comment (/##/) in microsoft mode, this method handles updating the current 3818c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// state, returning the token on the next source line. 3828c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnervoid Preprocessor::HandleMicrosoftCommentPaste(Token &Tok) { 3831a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek assert(CurTokenLexer && !CurPPLexer && 3848c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Pasted comment can only be formed from macro"); 3851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3868c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // We handle this by scanning for the closest real lexer, switching it to 3878c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // raw mode and preprocessor mode. This will cause it to return \n as an 38884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // explicit EOD token. 3891a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek PreprocessorLexer *FoundLexer = 0; 3908c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner bool LexerWasInPPMode = false; 3918c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner for (unsigned i = 0, e = IncludeMacroStack.size(); i != e; ++i) { 3928c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner IncludeStackInfo &ISI = *(IncludeMacroStack.end()-i-1); 3931a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (ISI.ThePPLexer == 0) continue; // Scan for a real lexer. 3941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3958c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Once we find a real lexer, mark it as raw mode (disabling macro 39684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // expansions) and preprocessor mode (return EOD). We know that the lexer 3978c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // was *not* in raw mode before, because the macro that the comment came 3988c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // from was expanded. However, it could have already been in preprocessor 3998c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // mode (#if COMMENT) in which case we have to return it to that mode and 40084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // return EOD. 4011a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek FoundLexer = ISI.ThePPLexer; 4028c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->LexingRawMode = true; 4038c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner LexerWasInPPMode = FoundLexer->ParsingPreprocessorDirective; 4048c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->ParsingPreprocessorDirective = true; 4058c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner break; 4068c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 4071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4088c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Okay, we either found and switched over the lexer, or we didn't find a 4098c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // lexer. In either case, finish off the macro the comment came from, getting 4108c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // the next token. 4118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (!HandleEndOfTokenLexer(Tok)) Lex(Tok); 4121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 41384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Discarding comments as long as we don't have EOF or EOD. This 'comments 4148c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // out' the rest of the line, including any tokens that came from other macros 4158c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // that were active, as in: 4168c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // #define submacro a COMMENT b 4178c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // submacro c 4188c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // which should lex to 'a' only: 'b' and 'c' should be removed. 41984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (Tok.isNot(tok::eod) && Tok.isNot(tok::eof)) 4208c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner Lex(Tok); 4211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 42284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If we got an eod token, then we successfully found the end of the line. 42384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.is(tok::eod)) { 4248c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(FoundLexer && "Can't get end of line without an active lexer"); 4258c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Restore the lexer back to normal mode instead of raw mode. 4268c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->LexingRawMode = false; 4271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 42884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the lexer was already in preprocessor mode, just return the EOD token 4298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // to finish the preprocessor line. 4308c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (LexerWasInPPMode) return; 4311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4328c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Otherwise, switch out of PP mode and return the next lexed token. 4338c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->ParsingPreprocessorDirective = false; 4348c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return Lex(Tok); 4358c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 4361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If we got an EOF token, then we reached the end of the token stream but 4388c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // didn't find an explicit \n. This can only happen if there was no lexer 43984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // active (an active lexer would return EOD at EOF if there was no \n in 4408c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // preprocessor directive mode), so just return EOF as our token. 44184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne assert(!FoundLexer && "Lexer should return EOD before EOF in PP mode"); 4428c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 443