PPLexerChange.cpp revision 585ec93e1bd4fdd5a37aa19848e5f92084f0d923
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" 21585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor#include "llvm/Support/FileSystem.h" 2215ba2af0f9ad52e67e908179b8ec2eb404e11c61Ted Kremenek#include "llvm/Support/MemoryBuffer.h" 23585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor#include "llvm/Support/PathV2.h" 24585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor#include "llvm/ADT/StringSwitch.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 347d39d742383ade80c9d937729bfc539c6c978845Chris Lattner/// #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 } 618c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return 0; 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. 71e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattnervoid Preprocessor::EnterSourceFile(FileID FID, const DirectoryLookup *CurDir, 72e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner SourceLocation Loc) { 738c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(CurTokenLexer == 0 && "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); 82e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner return; 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)) << ""; 94e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner return; 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); 105e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner return; 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; 120b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 121b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_Lexer; 122b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor 1238c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Notify the client, if desired, that we are in a new source file. 1248c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (Callbacks && !CurLexer->Is_PragmaLexer) { 1259d72851fec9e9c62570a027d42701562bbf29751Chris Lattner SrcMgr::CharacteristicKind FileType = 1260b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner SourceMgr.getFileCharacteristic(CurLexer->getFileLoc()); 1271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1288c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner Callbacks->FileChanged(CurLexer->getFileLoc(), 1298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner PPCallbacks::EnterFile, FileType); 1308c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 1318c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 1328c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1336137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// EnterSourceFileWithPTH - Add a source file to the top of the include stack 1346137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek/// and start getting tokens from it using the PTH cache. 1351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::EnterSourceFileWithPTH(PTHLexer *PL, 1366137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek const DirectoryLookup *CurDir) { 1371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1386137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (CurPPLexer || CurTokenLexer) 1396137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek PushIncludeMacroStack(); 1408c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1416137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurDirLookup = CurDir; 1426137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurPTHLexer.reset(PL); 1436137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek CurPPLexer = CurPTHLexer.get(); 144b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 145b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_PTHLexer; 146b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor 1476137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek // Notify the client, if desired, that we are in a new source file. 1486137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek if (Callbacks) { 1492b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = CurPPLexer->getFileID(); 1508c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceLocation EnterLoc = SourceMgr.getLocForStartOfFile(FID); 1518c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SrcMgr::CharacteristicKind FileType = 1528c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceMgr.getFileCharacteristic(EnterLoc); 1538c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner Callbacks->FileChanged(EnterLoc, PPCallbacks::EnterFile, FileType); 1546137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek } 1556137dc99ef0c2b14050631367057758b0d596cb3Ted Kremenek} 1568c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1578c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterMacro - Add a Macro to the top of the include stack and start lexing 1588c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// tokens from it instead of the current buffer. 159e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattnervoid Preprocessor::EnterMacro(Token &Tok, SourceLocation ILEnd, 160e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner MacroArgs *Args) { 161ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PushIncludeMacroStack(); 1628c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner CurDirLookup = 0; 1631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1648c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == 0) { 165e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner CurTokenLexer.reset(new TokenLexer(Tok, ILEnd, Args, *this)); 1668c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } else { 167caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(TokenLexerCache[--NumCachedTokenLexers]); 168e7fb48466afcbf2c4ccdfa658824282fdc3c512cChris Lattner CurTokenLexer->Init(Tok, ILEnd, Args); 1698c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 170b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 171b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_TokenLexer; 1728c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 1738c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1748c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// EnterTokenStream - Add a "macro" context to the top of the include stack, 1756b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// which will cause the lexer to start returning the specified tokens. 1766b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1776b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If DisableMacroExpansion is true, tokens lexed from the token stream will 1786b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// not be subject to further macro expansion. Otherwise, these tokens will 1796b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// be re-macro-expanded when/if expansion is enabled. 1806b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1816b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If OwnsTokens is false, this method assumes that the specified stream of 1826b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// tokens has a permanent owner somewhere, so they do not need to be copied. 1836b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// If it is true, it assumes the array of tokens is allocated with new[] and 1846b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// must be freed. 1856b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner/// 1866b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattnervoid Preprocessor::EnterTokenStream(const Token *Toks, unsigned NumToks, 1876b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner bool DisableMacroExpansion, 1886b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner bool OwnsTokens) { 1898c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Save our current state. 190ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PushIncludeMacroStack(); 1918c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner CurDirLookup = 0; 1928c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 1938c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Create a macro expander to expand from the specified token stream. 1948c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == 0) { 195caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(new TokenLexer(Toks, NumToks, DisableMacroExpansion, 196caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek OwnsTokens, *this)); 1978c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } else { 198caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(TokenLexerCache[--NumCachedTokenLexers]); 1996b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner CurTokenLexer->Init(Toks, NumToks, DisableMacroExpansion, OwnsTokens); 2008c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 201b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor if (CurLexerKind != CLK_LexAfterModuleImport) 202b8db7cd9ac05c522855631670ec2e97255384f5aDouglas Gregor CurLexerKind = CLK_TokenLexer; 2038c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 2048c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 205585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor/// \brief Compute the relative path that names the given file relative to 206585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor/// the given directory. 207585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregorstatic void computeRelativePath(FileManager &FM, const DirectoryEntry *Dir, 208585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor const FileEntry *File, 209585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor llvm::SmallString<128> &Result) { 210585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Result.clear(); 211585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 212585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor StringRef FilePath = File->getDir()->getName(); 213585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor StringRef Path = FilePath; 214585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor while (!Path.empty()) { 215585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (const DirectoryEntry *CurDir = FM.getDirectory(Path)) { 216585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (CurDir == Dir) { 217585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Result = FilePath.substr(Path.size()); 218585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor llvm::sys::path::append(Result, 219585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor llvm::sys::path::filename(File->getName())); 220585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor return; 221585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 222585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 223585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 224585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Path = llvm::sys::path::parent_path(Path); 225585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 226585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 227585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Result = File->getName(); 228585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor} 229585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 2308c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleEndOfFile - This callback is invoked when the lexer hits the end of 2318c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// the current file. This either returns the EOF token or pops a level off 2328c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// the include stack and keeps going. 2338c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::HandleEndOfFile(Token &Result, bool isEndOfMacro) { 2348c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(!CurTokenLexer && 2358c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Ending a file when currently in a macro!"); 2361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // See if this file had a controlling macro. 2381a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (CurPPLexer) { // Not ending a macro, ignore it. 2391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const IdentifierInfo *ControllingMacro = 2401a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurPPLexer->MIOpt.GetControllingMacroAtEndOfFile()) { 24183d63c78810556d26b62ac4cbae2eda6cdd2570cSteve Naroff // Okay, this has a controlling macro, remember in HeaderFileInfo. 2421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const FileEntry *FE = 243d83d2e73fdbe425acc4cac7b8130c464cb98333dDouglas Gregor SourceMgr.getFileEntryForID(CurPPLexer->getFileID())) 2448c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner HeaderInfo.SetFileControllingMacro(FE, ControllingMacro); 2458c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 2468c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 2471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2483eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // Complain about reaching a true EOF within arc_cf_code_audited. 2493eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // We don't want to complain about reaching the end of a macro 2503eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall // instantiation or a _Pragma. 2513eff3214647fe25e80dbf1dd096cc73a11d9a77aJohn McCall if (PragmaARCCFCodeAuditedLoc.isValid() && 252d80d90d65895a2004b0d01c67ac417cde6cc62fdJohn McCall !isEndOfMacro && !(CurLexer && CurLexer->Is_PragmaLexer)) { 2538dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall Diag(PragmaARCCFCodeAuditedLoc, diag::err_pp_eof_in_arc_cf_code_audited); 2548dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall 2558dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall // Recover by leaving immediately. 2568dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall PragmaARCCFCodeAuditedLoc = SourceLocation(); 2578dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall } 2588dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall 2598c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If this is a #include'd file, pop it off the include stack and continue 2608c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // lexing the #includer file. 2618c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (!IncludeMacroStack.empty()) { 2627d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 2637d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis // If we lexed the code-completion file, act as if we reached EOF. 2647d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (isCodeCompletionEnabled() && CurPPLexer && 2657d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis SourceMgr.getLocForStartOfFile(CurPPLexer->getFileID()) == 2667d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CodeCompletionFileLoc) { 2677d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (CurLexer) { 2687d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis Result.startToken(); 2697d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurLexer->FormTokenWithChars(Result, CurLexer->BufferEnd, tok::eof); 2707d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurLexer.reset(); 2717d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } else { 2727d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis assert(CurPTHLexer && "Got EOF but no current lexer set!"); 2737d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPTHLexer->getEOF(Result); 2747d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPTHLexer.reset(); 2757d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 2767d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 2777d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis CurPPLexer = 0; 2787d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis return true; 2797d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis } 2807d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis 281d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis if (!isEndOfMacro && CurPPLexer && 282d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.getIncludeLoc(CurPPLexer->getFileID()).isValid()) { 283d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis // Notify SourceManager to record the number of FileIDs that were created 284d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis // during lexing of the #include'd file. 285d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis unsigned NumFIDs = 286d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.local_sloc_entry_size() - 287d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis CurPPLexer->getInitialNumSLocEntries() + 1/*#include'd file*/; 288d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis SourceMgr.setNumCreatedFIDsForFileID(CurPPLexer->getFileID(), NumFIDs); 289d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis } 290d9d2b679d0728ea7f539f38aaea38e26b8b08043Argyrios Kyrtzidis 291c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis FileID ExitedFID; 292c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis if (Callbacks && !isEndOfMacro && CurPPLexer) 293c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis ExitedFID = CurPPLexer->getFileID(); 294c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis 2958c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // We're done with the #included file. 2968c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner RemoveTopOfLexerStack(); 2978c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 2988c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Notify the client, if desired, that we are in a new source file. 2991a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (Callbacks && !isEndOfMacro && CurPPLexer) { 3009d72851fec9e9c62570a027d42701562bbf29751Chris Lattner SrcMgr::CharacteristicKind FileType = 3018c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner SourceMgr.getFileCharacteristic(CurPPLexer->getSourceLocation()); 3028c61b53fdb283dade0bbf51c3c5befbc5d0aefa7Chris Lattner Callbacks->FileChanged(CurPPLexer->getSourceLocation(), 303c892c5fa92db137ff68d95afb13fe969d17f4fb2Argyrios Kyrtzidis PPCallbacks::ExitFile, FileType, ExitedFID); 3048c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 3058c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3068c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Client should lex another token. 3078c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return false; 3088c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 3098c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3108c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If the file ends with a newline, form the EOF token on the newline itself, 3118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // rather than "on the line following it", which doesn't exist. This makes 3128c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // diagnostics relating to the end of file include the last file that the user 3138c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // actually typed, which is goodness. 3141a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (CurLexer) { 3151a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek const char *EndPos = CurLexer->BufferEnd; 3161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (EndPos != CurLexer->BufferStart && 3171a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek (EndPos[-1] == '\n' || EndPos[-1] == '\r')) { 3188c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner --EndPos; 3191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3201a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek // Handle \n\r and \r\n: 3211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (EndPos != CurLexer->BufferStart && 3221a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek (EndPos[-1] == '\n' || EndPos[-1] == '\r') && 3231a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek EndPos[-1] != EndPos[0]) 3241a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek --EndPos; 3251a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek } 3261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3271a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek Result.startToken(); 3281a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurLexer->BufferPtr = EndPos; 3291a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurLexer->FormTokenWithChars(Result, EndPos, tok::eof); 3301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3311a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek // We're done with the #included file. 3321a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurLexer.reset(); 33367116083e70ad44799808c7472d9cd9e7e21d4d5Chris Lattner } else { 33467116083e70ad44799808c7472d9cd9e7e21d4d5Chris Lattner assert(CurPTHLexer && "Got EOF but no current lexer set!"); 33559d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek CurPTHLexer->getEOF(Result); 3361a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek CurPTHLexer.reset(); 3378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 3381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 33941938c8493b4380df738263166b746eacb33c309Ted Kremenek CurPPLexer = 0; 3408c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3410827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // This is the end of the top-level file. 'WarnUnusedMacroLocs' has collected 3420827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // all macro locations that we need to warn because they are not used. 3430827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis for (WarnUnusedMacroLocsTy::iterator 3440827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis I=WarnUnusedMacroLocs.begin(), E=WarnUnusedMacroLocs.end(); I!=E; ++I) 3450827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis Diag(*I, diag::pp_macro_not_used); 346dbd8209b33e6c9f151e4913a9c095d64a95439c4Daniel Dunbar 347585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // If we are building a module that has an umbrella header, make sure that 348585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // each of the headers within the directory covered by the umbrella header 349585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // was actually included by the umbrella header. 350585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (Module *Mod = getCurrentModule()) { 351585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (Mod->getUmbrellaHeader()) { 352585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor SourceLocation StartLoc 353585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor = SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID()); 354585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 355585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (getDiagnostics().getDiagnosticLevel( 356585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor diag::warn_uncovered_module_header, 357585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor StartLoc) != DiagnosticsEngine::Ignored) { 358585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor typedef typename llvm::sys::fs::recursive_directory_iterator 359585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor recursive_directory_iterator; 360585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor const DirectoryEntry *Dir = Mod->getUmbrellaDir(); 361585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor llvm::error_code EC; 362585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor for (recursive_directory_iterator Entry(Dir->getName(), EC), End; 363585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Entry != End && !EC; Entry.increment(EC)) { 364585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor using llvm::StringSwitch; 365585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 366585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // Check whether this entry has an extension typically associated with 367585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // headers. 368585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (!StringSwitch<bool>(llvm::sys::path::extension(Entry->path())) 369585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor .Cases(".h", ".H", ".hh", ".hpp", true) 370585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor .Default(false)) 371585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor continue; 372585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 373585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (const FileEntry *Header = getFileManager().getFile(Entry->path())) 374585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor if (!getSourceManager().hasFileInfo(Header)) { 375585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor // Find the 376585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor llvm::SmallString<128> RelativePath; 377585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor computeRelativePath(FileMgr, Dir, Header, RelativePath); 378585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor Diag(StartLoc, diag::warn_uncovered_module_header) 379585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor << RelativePath; 380585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 381585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 382585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 383585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 384585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor } 385585ec93e1bd4fdd5a37aa19848e5f92084f0d923Douglas Gregor 3868c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return true; 3878c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 3888c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3898c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleEndOfTokenLexer - This callback is invoked when the current TokenLexer 3908c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// hits the end of its token stream. 3918c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnerbool Preprocessor::HandleEndOfTokenLexer(Token &Result) { 3921a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek assert(CurTokenLexer && !CurPPLexer && 3938c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Ending a macro when currently in a #include file!"); 3948c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 3955b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis if (!MacroExpandingLexersStack.empty() && 3965b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis MacroExpandingLexersStack.back().first == CurTokenLexer.get()) 3975b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis removeCachedMacroExpandedTokensOfLastLexer(); 3985b3284a9275a27f5c4410e25eb8933be540601d6Argyrios Kyrtzidis 3998c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Delete or cache the now-dead macro expander. 4008c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == TokenLexerCacheSize) 401caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(); 4028c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner else 403caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek TokenLexerCache[NumCachedTokenLexers++] = CurTokenLexer.take(); 4048c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 4058c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Handle this like a #include file being popped off the stack. 4068c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return HandleEndOfFile(Result, true); 4078c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 4088c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 4098c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// RemoveTopOfLexerStack - Pop the current lexer/macro exp off the top of the 4108c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// lexer stack. This should only be used in situations where the current 4118c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// state of the top-of-stack lexer is unknown. 4128c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnervoid Preprocessor::RemoveTopOfLexerStack() { 4138c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(!IncludeMacroStack.empty() && "Ran out of stack entries to load"); 4141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4158c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (CurTokenLexer) { 4168c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Delete or cache the now-dead macro expander. 4178c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (NumCachedTokenLexers == TokenLexerCacheSize) 418caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek CurTokenLexer.reset(); 4198c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner else 420caaa7df2c78bbd40197823034c0275f3dcbd63e7Ted Kremenek TokenLexerCache[NumCachedTokenLexers++] = CurTokenLexer.take(); 4211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 4221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 423ed04c4cdca11119cac7d2fd65685444ce25f9e37Ted Kremenek PopIncludeMacroStack(); 4248c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 4258c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner 4268c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// HandleMicrosoftCommentPaste - When the macro expander pastes together a 4278c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// comment (/##/) in microsoft mode, this method handles updating the current 4288c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner/// state, returning the token on the next source line. 4298c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattnervoid Preprocessor::HandleMicrosoftCommentPaste(Token &Tok) { 4301a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek assert(CurTokenLexer && !CurPPLexer && 4318c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner "Pasted comment can only be formed from macro"); 4321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4338c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // We handle this by scanning for the closest real lexer, switching it to 4348c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // raw mode and preprocessor mode. This will cause it to return \n as an 43584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // explicit EOD token. 4361a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek PreprocessorLexer *FoundLexer = 0; 4378c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner bool LexerWasInPPMode = false; 4388c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner for (unsigned i = 0, e = IncludeMacroStack.size(); i != e; ++i) { 4398c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner IncludeStackInfo &ISI = *(IncludeMacroStack.end()-i-1); 4401a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek if (ISI.ThePPLexer == 0) continue; // Scan for a real lexer. 4411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4428c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Once we find a real lexer, mark it as raw mode (disabling macro 44384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // expansions) and preprocessor mode (return EOD). We know that the lexer 4448c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // was *not* in raw mode before, because the macro that the comment came 4458c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // from was expanded. However, it could have already been in preprocessor 4468c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // mode (#if COMMENT) in which case we have to return it to that mode and 44784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // return EOD. 4481a531570d294ffc300cce1bc5e73de847a370f4fTed Kremenek FoundLexer = ISI.ThePPLexer; 4498c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->LexingRawMode = true; 4508c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner LexerWasInPPMode = FoundLexer->ParsingPreprocessorDirective; 4518c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->ParsingPreprocessorDirective = true; 4528c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner break; 4538c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 4541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4558c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Okay, we either found and switched over the lexer, or we didn't find a 4568c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // lexer. In either case, finish off the macro the comment came from, getting 4578c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // the next token. 4588c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (!HandleEndOfTokenLexer(Tok)) Lex(Tok); 4591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 46084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Discarding comments as long as we don't have EOF or EOD. This 'comments 4618c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // out' the rest of the line, including any tokens that came from other macros 4628c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // that were active, as in: 4638c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // #define submacro a COMMENT b 4648c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // submacro c 4658c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // which should lex to 'a' only: 'b' and 'c' should be removed. 46684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (Tok.isNot(tok::eod) && Tok.isNot(tok::eof)) 4678c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner Lex(Tok); 4681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 46984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If we got an eod token, then we successfully found the end of the line. 47084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.is(tok::eod)) { 4718c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner assert(FoundLexer && "Can't get end of line without an active lexer"); 4728c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Restore the lexer back to normal mode instead of raw mode. 4738c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->LexingRawMode = false; 4741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 47584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the lexer was already in preprocessor mode, just return the EOD token 4768c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // to finish the preprocessor line. 4778c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner if (LexerWasInPPMode) return; 4781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4798c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // Otherwise, switch out of PP mode and return the next lexed token. 4808c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner FoundLexer->ParsingPreprocessorDirective = false; 4818c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner return Lex(Tok); 4828c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner } 4831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4848c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // If we got an EOF token, then we reached the end of the token stream but 4858c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // didn't find an explicit \n. This can only happen if there was no lexer 48684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // active (an active lexer would return EOD at EOF if there was no \n in 4878c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner // preprocessor directive mode), so just return EOF as our token. 48884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne assert(!FoundLexer && "Lexer should return EOD before EOF in PP mode"); 4898c32b1a7daf246b26e52b46604d91ce3717e28e5Chris Lattner} 490