PPDirectives.cpp revision d6471f7c1921c7802804ce3ff6fe9768310f72b9
1a3b605ef0d535c5c5ac3f00e1e2d46fa7336d26cChris Lattner//===--- PPDirectives.cpp - Directive Handling for Preprocessor -----------===// 2141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// 3141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// The LLVM Compiler Infrastructure 4141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// 5141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// This file is distributed under the University of Illinois Open Source 6141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// License. See LICENSE.TXT for details. 7141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// 8141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 9141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// 10141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// This file implements # directive processing for the Preprocessor. 11141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// 12141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 13141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 14141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner#include "clang/Lex/Preprocessor.h" 15359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner#include "clang/Lex/LiteralSupport.h" 16141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner#include "clang/Lex/HeaderSearch.h" 17141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner#include "clang/Lex/MacroInfo.h" 18500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/Lex/LexDiagnostic.h" 19f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor#include "clang/Lex/CodeCompletionHandler.h" 20fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor#include "clang/Lex/ModuleLoader.h" 2180c60f72848896f867f6b7e664e7060d9e78f019Douglas Gregor#include "clang/Lex/Pragma.h" 226e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner#include "clang/Basic/FileManager.h" 23141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner#include "clang/Basic/SourceManager.h" 24359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner#include "llvm/ADT/APInt.h" 25141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerusing namespace clang; 26141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 27141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 28141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Utility Methods for Preprocessor Directive Handling. 29141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 30141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 31f47724bf78299c7a50f008e0443c5f9f9f279ddcChris LattnerMacroInfo *Preprocessor::AllocateMacroInfo() { 329714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MacroInfoChain *MIChain; 331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 349714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek if (MICache) { 359714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChain = MICache; 369714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MICache = MICache->Next; 37af8fa25c0d4e0540952a50bbd06dc1558954ccd9Ted Kremenek } 389714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek else { 399714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChain = BP.Allocate<MacroInfoChain>(); 409714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek } 419714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek 429714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChain->Next = MIChainHead; 439714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChain->Prev = 0; 449714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek if (MIChainHead) 459714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChainHead->Prev = MIChain; 469714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChainHead = MIChain; 479714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek 489714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek return &(MIChain->MI); 49f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner} 50f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 51f47724bf78299c7a50f008e0443c5f9f9f279ddcChris LattnerMacroInfo *Preprocessor::AllocateMacroInfo(SourceLocation L) { 52f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroInfo *MI = AllocateMacroInfo(); 530ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek new (MI) MacroInfo(L); 540ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek return MI; 550ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek} 560ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek 57f47724bf78299c7a50f008e0443c5f9f9f279ddcChris LattnerMacroInfo *Preprocessor::CloneMacroInfo(const MacroInfo &MacroToClone) { 58f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroInfo *MI = AllocateMacroInfo(); 59f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner new (MI) MacroInfo(MacroToClone, BP); 60f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner return MI; 61f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner} 62f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 630301b3ff132a4d986c092d161cb77d74b04cd2a6Chris Lattner/// ReleaseMacroInfo - Release the specified MacroInfo. This memory will 640301b3ff132a4d986c092d161cb77d74b04cd2a6Chris Lattner/// be reused for allocating new MacroInfo objects. 652c1ab9079cb117dc0470ab423fe0bc5177546339Chris Lattnervoid Preprocessor::ReleaseMacroInfo(MacroInfo *MI) { 669714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MacroInfoChain *MIChain = (MacroInfoChain*) MI; 679714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek if (MacroInfoChain *Prev = MIChain->Prev) { 689714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MacroInfoChain *Next = MIChain->Next; 699714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek Prev->Next = Next; 709714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek if (Next) 719714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek Next->Prev = Prev; 729714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek } 739714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek else { 749714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek assert(MIChainHead == MIChain); 759714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChainHead = MIChain->Next; 769714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChainHead->Prev = 0; 779714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek } 789714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChain->Next = MICache; 799714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MICache = MIChain; 800301b3ff132a4d986c092d161cb77d74b04cd2a6Chris Lattner 819714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MI->Destroy(); 829714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek} 830301b3ff132a4d986c092d161cb77d74b04cd2a6Chris Lattner 84141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// DiscardUntilEndOfDirective - Read and discard all tokens remaining on the 8584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// current line until the tok::eod token is found. 86141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::DiscardUntilEndOfDirective() { 87141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tmp; 88141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner do { 89141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tmp); 90a5ef584fd3d18da0c98342b4b6453948b7eb30d3Peter Collingbourne assert(Tmp.isNot(tok::eof) && "EOF seen while discarding directive tokens"); 9184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne } while (Tmp.isNot(tok::eod)); 92141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 93141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 94141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ReadMacroName - Lex and validate a macro name, which occurs after a 9584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// #define or #undef. This sets the token kind to eod and discards the rest 96141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// of the macro line if the macro name is invalid. isDefineUndef is 1 if 97141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// this is due to a a #define, 2 if #undef directive, 0 if it is something 98141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// else (e.g. #ifdef). 99141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::ReadMacroName(Token &MacroNameTok, char isDefineUndef) { 100141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the token, don't allow macro expansion on it. 101141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(MacroNameTok); 1021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1031fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor if (MacroNameTok.is(tok::code_completion)) { 1041fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor if (CodeComplete) 1051fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor CodeComplete->CodeCompleteMacroName(isDefineUndef == 1); 1067d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis setCodeCompletionReached(); 1071fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor LexUnexpandedToken(MacroNameTok); 1081fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor } 1091fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor 110141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Missing macro name? 11184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) { 1123692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(MacroNameTok, diag::err_pp_missing_macro_name); 1133692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1143692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = MacroNameTok.getIdentifierInfo(); 117141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) { 118453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor bool Invalid = false; 119453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor std::string Spelling = getSpelling(MacroNameTok, &Invalid); 120453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (Invalid) 121453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor return; 122453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor 1239485d2382c1e3833ccbed20a185f6ab96d4dd703Chris Lattner const IdentifierInfo &Info = Identifiers.get(Spelling); 1249485d2382c1e3833ccbed20a185f6ab96d4dd703Chris Lattner if (Info.isCPlusPlusOperatorKeyword()) 125141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C++ 2.5p2: Alternative tokens behave the same as its primary token 126141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // except for their spellings. 12756b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner Diag(MacroNameTok, diag::err_pp_operator_used_as_macro_name) << Spelling; 128141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner else 129141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::err_pp_macro_not_identifier); 130141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Fall through on error. 131141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (isDefineUndef && II->getPPKeywordID() == tok::pp_defined) { 132141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error if defining "defined": C99 6.10.8.4. 133141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::err_defined_macro_name); 134141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (isDefineUndef && II->hasMacroDefinition() && 135141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner getMacroInfo(II)->isBuiltinMacro()) { 136141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error if defining "__LINE__" and other builtins: C99 6.10.8.4. 137141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (isDefineUndef == 1) 138141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::pp_redef_builtin_macro); 139141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner else 140141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::pp_undef_builtin_macro); 141141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 142141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we got a good identifier node. Return it. 143141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 144141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 146141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Invalid macro name, read and discard the rest of the line. Then set the 14784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // token kind to tok::eod. 14884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne MacroNameTok.setKind(tok::eod); 149141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return DiscardUntilEndOfDirective(); 150141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 151141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 15284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// CheckEndOfDirective - Ensure that the next token is a tok::eod token. If 15384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// not, emit a diagnostic and consume up until the eod. If EnableMacros is 154ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner/// true, then we consider macros that expand to zero tokens as being ok. 155ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattnervoid Preprocessor::CheckEndOfDirective(const char *DirType, bool EnableMacros) { 156141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tmp; 157ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner // Lex unexpanded tokens for most directives: macros might expand to zero 158ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner // tokens, causing us to miss diagnosing invalid lines. Some directives (like 159ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner // #line) allow empty macros. 160ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner if (EnableMacros) 161ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner Lex(Tmp); 162ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner else 163ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner LexUnexpandedToken(Tmp); 1641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 165141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // There should be no tokens after the directive, but we allow them as an 166141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // extension. 167141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (Tmp.is(tok::comment)) // Skip comments in -C mode. 168141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tmp); 1691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tmp.isNot(tok::eod)) { 171959875a66d74d38b8f2d499662afb142d249bf3eChris Lattner // Add a fixit in GNU/C99/C++ mode. Don't offer a fixit for strict-C89, 172b2eb53d9fd973a1a02e05e67a3307b3efd12eff2Peter Collingbourne // or if this is a macro-style preprocessing directive, because it is more 173b2eb53d9fd973a1a02e05e67a3307b3efd12eff2Peter Collingbourne // trouble than it is worth to insert /**/ and check that there is no /**/ 174b2eb53d9fd973a1a02e05e67a3307b3efd12eff2Peter Collingbourne // in the range also. 175849b243d4065f56742a4677d6dc8277609a151f8Douglas Gregor FixItHint Hint; 176b2eb53d9fd973a1a02e05e67a3307b3efd12eff2Peter Collingbourne if ((Features.GNUMode || Features.C99 || Features.CPlusPlus) && 177b2eb53d9fd973a1a02e05e67a3307b3efd12eff2Peter Collingbourne !CurTokenLexer) 178849b243d4065f56742a4677d6dc8277609a151f8Douglas Gregor Hint = FixItHint::CreateInsertion(Tmp.getLocation(),"//"); 179849b243d4065f56742a4677d6dc8277609a151f8Douglas Gregor Diag(Tmp, diag::ext_pp_extra_tokens_at_eol) << DirType << Hint; 180141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 181141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 182141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 183141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 184141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 185141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 186141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// SkipExcludedConditionalBlock - We just read a #if or related directive and 187141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// decided that the subsequent tokens are in the #if'd out portion of the 188141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// file. Lex the rest of the file, until we see an #endif. If 189141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// FoundNonSkipPortion is true, then we have already emitted code for part of 190141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// this #if directive, so #else/#elif blocks should never be entered. If ElseOk 191141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// is true, then #else directives are ok, if not, then we have already seen one 192141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// so a #else directive is a duplicate. When this returns, the caller can lex 193141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// the first valid token. 194141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::SkipExcludedConditionalBlock(SourceLocation IfTokenLoc, 195141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool FoundNonSkipPortion, 196141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool FoundElse) { 197141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumSkipped; 198f6452c5421c5db5a7ceff581525f286931d97f1aTed Kremenek assert(CurTokenLexer == 0 && CurPPLexer && "Lexing a macro, not a file?"); 199141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 20060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->pushConditionalLevel(IfTokenLoc, /*isSkipping*/false, 201141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FoundNonSkipPortion, FoundElse); 2021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 203268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CurPTHLexer) { 204268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PTHSkipExcludedConditionalBlock(); 205268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return; 206268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 2071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 208141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Enter raw mode to disable identifier lookup (and thus macro expansion), 209141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // disabling warnings, etc. 21060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = true; 211141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 212141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (1) { 2132c6b193d574e0780ff0b8450ce1fde105f4881acChris Lattner CurLexer->Lex(Tok); 2141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 215f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor if (Tok.is(tok::code_completion)) { 216f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor if (CodeComplete) 217f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor CodeComplete->CodeCompleteInConditionalExclusion(); 2187d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis setCodeCompletionReached(); 219f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor continue; 220f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor } 221f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor 222141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is the end of the buffer, we have an error. 223141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.is(tok::eof)) { 224141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Emit errors for each unterminated conditional on the stack, including 225141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the current one. 22660e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek while (!CurPPLexer->ConditionalStack.empty()) { 2277d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (CurLexer->getFileLoc() != CodeCompletionFileLoc) 2282d474ba9e8ae43a1a5a9f72718c0d79092b9453fDouglas Gregor Diag(CurPPLexer->ConditionalStack.back().IfLoc, 2292d474ba9e8ae43a1a5a9f72718c0d79092b9453fDouglas Gregor diag::err_pp_unterminated_conditional); 23060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ConditionalStack.pop_back(); 2311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 2321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 233141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Just return and let the caller lex after this #include. 234141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 235141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 2361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 237141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this token is not a preprocessor directive, just skip it. 238141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::hash) || !Tok.isAtStartOfLine()) 239141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 2401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 241141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We just parsed a # character at the start of a line, so we're in 242141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // directive mode. Tell the lexer this so any newlines we see will be 24384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // converted into an EOD token (this terminates the macro). 24460e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = true; 245ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(false); 246141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 2471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 248141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the next token, the directive flavor. 249141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 2501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 251141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this isn't an identifier directive (e.g. is "# 1\n" or "#\n", or 252141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // something bogus), skip it. 253c4bf2b9afb7d47445a9dc6bc848657098a4e3851Abramo Bagnara if (Tok.isNot(tok::raw_identifier)) { 25460e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 255141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 256ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 257141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 258141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 259141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 260141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the first letter isn't i or e, it isn't intesting to us. We know that 261141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // this is safe in the face of spelling differences, because there is no way 262141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // to spell an i/e in a strange way that is another letter. Skipping this 263141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // allows us to avoid looking up the identifier info for #define/#undef and 264141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // other common directives. 265c4bf2b9afb7d47445a9dc6bc848657098a4e3851Abramo Bagnara const char *RawCharData = Tok.getRawIdentifierData(); 266c4bf2b9afb7d47445a9dc6bc848657098a4e3851Abramo Bagnara 267141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner char FirstChar = RawCharData[0]; 2681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (FirstChar >= 'a' && FirstChar <= 'z' && 269141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FirstChar != 'i' && FirstChar != 'e') { 27060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 271141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 272ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 273141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 274141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 2751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 276141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the identifier name without trigraphs or embedded newlines. Note 277141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // that we can't use Tok.getIdentifierInfo() because its lookup is disabled 278141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // when skipping. 279b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer char DirectiveBuf[20]; 2805f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Directive; 281141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!Tok.needsCleaning() && Tok.getLength() < 20) { 2825f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Directive = StringRef(RawCharData, Tok.getLength()); 283141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 284141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner std::string DirectiveStr = getSpelling(Tok); 285b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer unsigned IdLen = DirectiveStr.size(); 286141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (IdLen >= 20) { 28760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 288141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 289ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 290141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 291141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 292b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer memcpy(DirectiveBuf, &DirectiveStr[0], IdLen); 2935f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Directive = StringRef(DirectiveBuf, IdLen); 294141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 2951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 296b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer if (Directive.startswith("if")) { 2975f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Sub = Directive.substr(2); 298b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer if (Sub.empty() || // "if" 299b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer Sub == "def" || // "ifdef" 300b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer Sub == "ndef") { // "ifndef" 301141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We know the entire #if/#ifdef/#ifndef block will be skipped, don't 302141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // bother parsing the condition. 303141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 30460e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->pushConditionalLevel(Tok.getLocation(), /*wasskipping*/true, 305141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*foundnonskip*/false, 3063a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth /*foundelse*/false); 3073a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth 3083a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth if (Callbacks) 3093a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth Callbacks->Endif(); 310141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 311b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer } else if (Directive[0] == 'e') { 3125f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Sub = Directive.substr(1); 313b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer if (Sub == "ndif") { // "endif" 31435410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("endif"); 315141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CondInfo; 316141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.WasSkipping = true; // Silence bogus warning. 31760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek bool InCond = CurPPLexer->popConditionalLevel(CondInfo); 318c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)InCond; // Silence warning in no-asserts mode. 319141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(!InCond && "Can't be skipping if not in a conditional!"); 3201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 321141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we popped the outermost skipping block, we're done skipping! 322141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!CondInfo.WasSkipping) 323141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 324b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer } else if (Sub == "lse") { // "else". 325141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #else directive in a skipping conditional. If not in some other 326141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // skipping conditional, and if #else hasn't already been seen, enter it 327141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // as a non-skipping conditional. 32860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek PPConditionalInfo &CondInfo = CurPPLexer->peekConditionalLevel(); 3291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 330141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #else with a #else before it, report the error. 331141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.FoundElse) Diag(Tok, diag::pp_err_else_after_else); 3321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 333141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Note that we've seen a #else in this conditional. 334141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundElse = true; 3351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3363a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth if (Callbacks) 3373a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth Callbacks->Else(); 3383a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth 339141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the conditional is at the top level, and the #if block wasn't 340141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // entered, enter the #else block now. 341141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!CondInfo.WasSkipping && !CondInfo.FoundNonSkip) { 342141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundNonSkip = true; 343e26224e61c8a3b607c73c52f2cd0344065d7b412Argyrios Kyrtzidis CheckEndOfDirective("else"); 344141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 345e26224e61c8a3b607c73c52f2cd0344065d7b412Argyrios Kyrtzidis } else { 346e26224e61c8a3b607c73c52f2cd0344065d7b412Argyrios Kyrtzidis DiscardUntilEndOfDirective(); // C99 6.10p4. 347141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 348b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer } else if (Sub == "lif") { // "elif". 34960e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek PPConditionalInfo &CondInfo = CurPPLexer->peekConditionalLevel(); 350141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 351141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ShouldEnter; 3523a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth const SourceLocation ConditionalBegin = CurPPLexer->getSourceLocation(); 353141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is in a skipping block or if we're already handled this #if 354141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // block, don't bother parsing the condition. 355141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.WasSkipping || CondInfo.FoundNonSkip) { 356141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 357141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ShouldEnter = false; 358141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 359141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore the value of LexingRawMode so that identifiers are 360141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // looked up, etc, inside the #elif expression. 36160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek assert(CurPPLexer->LexingRawMode && "We have to be skipping here!"); 36260e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = false; 363141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *IfNDefMacro = 0; 364141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ShouldEnter = EvaluateDirectiveExpression(IfNDefMacro); 36560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = true; 366141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 3673a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth const SourceLocation ConditionalEnd = CurPPLexer->getSourceLocation(); 3681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 369141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #elif with a #else before it, report the error. 370141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.FoundElse) Diag(Tok, diag::pp_err_elif_after_else); 3711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3723a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth if (Callbacks) 3733a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth Callbacks->Elif(SourceRange(ConditionalBegin, ConditionalEnd)); 3743a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth 375141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this condition is true, enter it! 376141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ShouldEnter) { 377141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundNonSkip = true; 378141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 379141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 380141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 381141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 3821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 38360e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 384141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 385ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 386141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 387141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 388141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if we are out of the conditional (saw an #endif or ran off the end 389141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // of the file, just stop skipping and return to lexing whatever came after 390141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the #if block. 39160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = false; 392141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 393141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 394268ee7016a2811803989487c0ad3799486092c63Ted Kremenekvoid Preprocessor::PTHSkipExcludedConditionalBlock() { 3951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump while (1) { 397268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPTHLexer); 398268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPTHLexer->LexingRawMode == false); 3991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 400268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Skip to the next '#else', '#elif', or #endif. 401268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CurPTHLexer->SkipBlock()) { 402268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // We have reached an #endif. Both the '#' and 'endif' tokens 403268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // have been consumed by the PTHLexer. Just pop off the condition level. 404268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PPConditionalInfo CondInfo; 405268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool InCond = CurPTHLexer->popConditionalLevel(CondInfo); 406c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)InCond; // Silence warning in no-asserts mode. 407268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(!InCond && "Can't be skipping if not in a conditional!"); 408268ee7016a2811803989487c0ad3799486092c63Ted Kremenek break; 409268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 411268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // We have reached a '#else' or '#elif'. Lex the next token to get 412268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // the directive flavor. 413268ee7016a2811803989487c0ad3799486092c63Ted Kremenek Token Tok; 414268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LexUnexpandedToken(Tok); 4151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 416268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // We can actually look up the IdentifierInfo here since we aren't in 417268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // raw mode. 418268ee7016a2811803989487c0ad3799486092c63Ted Kremenek tok::PPKeywordKind K = Tok.getIdentifierInfo()->getPPKeywordID(); 419268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 420268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (K == tok::pp_else) { 421268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #else: Enter the else condition. We aren't in a nested condition 422268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // since we skip those. We're always in the one matching the last 423268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // blocked we skipped. 424268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PPConditionalInfo &CondInfo = CurPTHLexer->peekConditionalLevel(); 425268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Note that we've seen a #else in this conditional. 426268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CondInfo.FoundElse = true; 4271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 428268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If the #if block wasn't entered then enter the #else block now. 429268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (!CondInfo.FoundNonSkip) { 430268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CondInfo.FoundNonSkip = true; 4311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 43284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Scan until the eod token. 433e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = true; 4348533bd5a32a12c51341e82d2aef083acbac7c04cDaniel Dunbar DiscardUntilEndOfDirective(); 435e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = false; 4361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 437268ee7016a2811803989487c0ad3799486092c63Ted Kremenek break; 438268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 4391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 440268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise skip this block. 441268ee7016a2811803989487c0ad3799486092c63Ted Kremenek continue; 442268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 4431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 444268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(K == tok::pp_elif); 445268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PPConditionalInfo &CondInfo = CurPTHLexer->peekConditionalLevel(); 446268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 447268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If this is a #elif with a #else before it, report the error. 448268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CondInfo.FoundElse) 449268ee7016a2811803989487c0ad3799486092c63Ted Kremenek Diag(Tok, diag::pp_err_elif_after_else); 4501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 451268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If this is in a skipping block or if we're already handled this #if 4521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // block, don't bother parsing the condition. We just skip this block. 453268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CondInfo.FoundNonSkip) 454268ee7016a2811803989487c0ad3799486092c63Ted Kremenek continue; 455268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 456268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Evaluate the condition of the #elif. 457268ee7016a2811803989487c0ad3799486092c63Ted Kremenek IdentifierInfo *IfNDefMacro = 0; 458268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = true; 459268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool ShouldEnter = EvaluateDirectiveExpression(IfNDefMacro); 460268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = false; 461268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 462268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If this condition is true, enter it! 463268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (ShouldEnter) { 464268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CondInfo.FoundNonSkip = true; 465268ee7016a2811803989487c0ad3799486092c63Ted Kremenek break; 466268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 467268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 468268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, skip this block and go to the next one. 469268ee7016a2811803989487c0ad3799486092c63Ted Kremenek continue; 470268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 471268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 472268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 4731072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// LookupFile - Given a "foo" or <foo> reference, look up the indicated file, 4741072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// return null on failure. isAngled indicates whether the file reference is 4751072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// for system #include's or not (i.e. using <> instead of ""). 476b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruthconst FileEntry *Preprocessor::LookupFile( 4775f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Filename, 478b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth bool isAngled, 479b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const DirectoryLookup *FromDir, 480b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const DirectoryLookup *&CurDir, 4815f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<char> *SearchPath, 482fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor SmallVectorImpl<char> *RelativePath, 483fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor StringRef *SuggestedModule) { 4841072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // If the header lookup mechanism may be relative to the current file, pass in 4851072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // info about where the current file is. 48610fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor const FileEntry *CurFileEnt = 0; 4871072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if (!FromDir) { 4882b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = getCurrentFileLexer()->getFileID(); 48910fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor CurFileEnt = SourceMgr.getFileEntryForID(FID); 4901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 491be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner // If there is no file entry associated with this file, it must be the 492be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner // predefines buffer. Any other file is not lexed with a normal lexer, so 49310fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // it won't be scanned for preprocessor directives. If we have the 49410fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // predefines buffer, resolve #include references (which come from the 49510fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // -include command line argument) as if they came from the main file, this 49610fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // affects file lookup etc. 49710fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor if (CurFileEnt == 0) { 498be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner FID = SourceMgr.getMainFileID(); 499be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner CurFileEnt = SourceMgr.getFileEntryForID(FID); 500be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner } 5011072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5031072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Do a standard file entry lookup. 5041072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner CurDir = CurDirLookup; 505b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const FileEntry *FE = HeaderInfo.LookupFile( 5067412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek Filename, isAngled, FromDir, CurDir, CurFileEnt, 507fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor SearchPath, RelativePath, SuggestedModule); 508f45b646244705410866d62f1d8bf017a047ed662Chris Lattner if (FE) return FE; 5091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5101072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Otherwise, see if this is a subframework header. If so, this is relative 5111072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // to one of the headers on the #include stack. Walk the list of the current 5121072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // headers on the #include stack and pass them to HeaderInfo. 513fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor // FIXME: SuggestedModule! 51481d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer()) { 51541938c8493b4380df738263166b746eacb33c309Ted Kremenek if ((CurFileEnt = SourceMgr.getFileEntryForID(CurPPLexer->getFileID()))) 516b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth if ((FE = HeaderInfo.LookupSubframeworkHeader(Filename, CurFileEnt, 5177412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek SearchPath, RelativePath))) 5181072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return FE; 5191072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5211072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner for (unsigned i = 0, e = IncludeMacroStack.size(); i != e; ++i) { 5221072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner IncludeStackInfo &ISEntry = IncludeMacroStack[e-i-1]; 52381d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer(ISEntry)) { 5241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if ((CurFileEnt = 52541938c8493b4380df738263166b746eacb33c309Ted Kremenek SourceMgr.getFileEntryForID(ISEntry.ThePPLexer->getFileID()))) 5267412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek if ((FE = HeaderInfo.LookupSubframeworkHeader( 5277412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek Filename, CurFileEnt, SearchPath, RelativePath))) 5281072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return FE; 5291072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5301072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5321072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Otherwise, we really couldn't find the file. 5331072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return 0; 5341072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner} 5351072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner 536141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 537141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 538141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Directive Handling. 539141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 540141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 541141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleDirective - This callback is invoked when the lexer sees a # token 5421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// at the start of a line. This consumes the directive, modifies the 543141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// lexer/preprocessor state, and advances the lexer(s) so that the next token 544141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// read is the correct one. 545141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleDirective(Token &Result) { 546141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // FIXME: Traditional: # with whitespace before it not recognized by K&R? 5471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 548141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We just parsed a # character at the start of a line, so we're in directive 549141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // mode. Tell the lexer this so any newlines we see will be converted into an 55084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // EOD token (which terminates the directive). 55160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = true; 5521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 553141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumDirectives; 554193575455e00eca03fd7177f60e3f2e6263cb661Kovarththanan Rajaratnam 555141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We are about to read a token. For the multiple-include optimization FA to 5561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // work, we have to remember if we had read any tokens *before* this 557141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // pp-directive. 5581d9c54df56391ac4740db27d551782e81189cb51Chris Lattner bool ReadAnyTokensBeforeDirective =CurPPLexer->MIOpt.getHasReadAnyTokensVal(); 5591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 56042aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // Save the '#' token in case we need to return it later. 56142aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner Token SavedHash = Result; 5621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 563141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the next token, the directive flavor. This isn't expanded due to 564141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3p8. 565141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Result); 5661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 567141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3p11: Is this preprocessor directive in macro invocation? e.g.: 568141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define A(x) #x 569141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // A(abc 570141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #warning blah 571141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // def) 572141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If so, the user is relying on non-portable behavior, emit a diagnostic. 573141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (InMacroArgs) 574141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::ext_embedded_directive); 5751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 576141e71fec621f65ab401dbe66609f7d3c033c6a5Chris LattnerTryAgain: 577141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Result.getKind()) { 57884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: 579141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; // null directive. 580141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::comment: 581141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Handle stuff like "# /*foo*/ define X" in -E -C mode. 582141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Result); 583141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner goto TryAgain; 584f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor case tok::code_completion: 585f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor if (CodeComplete) 586f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor CodeComplete->CodeCompleteDirective( 587f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor CurPPLexer->getConditionalStackDepth() > 0); 5887d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis setCodeCompletionReached(); 589f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor return; 590478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner case tok::numeric_constant: // # 7 GNU line marker directive. 5915f607c4b75abeedded11eff079dee73561d98203Chris Lattner if (getLangOptions().AsmPreprocessor) 5925f607c4b75abeedded11eff079dee73561d98203Chris Lattner break; // # 4 is not a preprocessor directive in .S files. 593478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return HandleDigitDirective(Result); 594141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 595141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = Result.getIdentifierInfo(); 596141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) break; // Not an identifier. 5971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 598141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Ask what the preprocessor keyword ID is. 599141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (II->getPPKeywordID()) { 600141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: break; 601141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.1 - Conditional Inclusion. 602141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_if: 603141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfDirective(Result, ReadAnyTokensBeforeDirective); 604141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ifdef: 605141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfdefDirective(Result, false, true/*not valid for miopt*/); 606141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ifndef: 607141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfdefDirective(Result, true, ReadAnyTokensBeforeDirective); 608141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_elif: 609141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleElifDirective(Result); 610141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_else: 611141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleElseDirective(Result); 612141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_endif: 613141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleEndifDirective(Result); 6141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 615141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.2 - Source File Inclusion. 616141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_include: 617ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor // Handle #include. 618ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeDirective(SavedHash.getLocation(), Result); 619b8e240ed8b8f58c7b7fe82776bd6147b437f5d53Chris Lattner case tok::pp___include_macros: 620ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor // Handle -imacros. 621ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeMacrosDirective(SavedHash.getLocation(), Result); 6221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 623141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3 - Macro Replacement. 624141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_define: 625141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleDefineDirective(Result); 626141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_undef: 627141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUndefDirective(Result); 628141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 629141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.4 - Line Control. 630141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_line: 631359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner return HandleLineDirective(Result); 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 633141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.5 - Error Directive. 634141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_error: 635141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUserDiagnosticDirective(Result, false); 6361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 637141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.6 - Pragma Directive. 638141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_pragma: 63980c60f72848896f867f6b7e664e7060d9e78f019Douglas Gregor return HandlePragmaDirective(PIK_HashPragma); 6401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 641141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // GNU Extensions. 642141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_import: 643ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleImportDirective(SavedHash.getLocation(), Result); 644141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_include_next: 645ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeNextDirective(SavedHash.getLocation(), Result); 6461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 647141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_warning: 648141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::ext_pp_warning_directive); 649141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUserDiagnosticDirective(Result, true); 650141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ident: 651141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIdentSCCSDirective(Result); 652141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_sccs: 653141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIdentSCCSDirective(Result); 654141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_assert: 655141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner //isExtension = true; // FIXME: implement #assert 656141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 657141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_unassert: 658141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner //isExtension = true; // FIXME: implement #unassert 659141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 6607143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 6617143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor case tok::pp___export_macro__: 6627143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor return HandleMacroExportDirective(Result); 663141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 664141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 665141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 6661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 66742aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // If this is a .S file, treat unknown # directives as non-preprocessor 66842aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // directives. This is important because # may be a comment or introduce 66942aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // various pseudo-ops. Just return the # token and push back the following 67042aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // token to be lexed next time. 67142aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner if (getLangOptions().AsmPreprocessor) { 6723d399a010102966158f6b69b07d636f113dc6ab4Daniel Dunbar Token *Toks = new Token[2]; 67342aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // Return the # and the token after it. 6741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Toks[0] = SavedHash; 67542aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner Toks[1] = Result; 676ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner 677ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner // If the second token is a hashhash token, then we need to translate it to 678ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner // unknown so the token lexer doesn't try to perform token pasting. 679ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner if (Result.is(tok::hashhash)) 680ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner Toks[1].setKind(tok::unknown); 681ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner 68242aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // Enter this token stream so that we re-lex the tokens. Make sure to 68342aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // enable macro expansion, in case the token after the # is an identifier 68442aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // that is expanded. 68542aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner EnterTokenStream(Toks, 2, false, true); 68642aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner return; 68742aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner } 6881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 689141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we reached here, the preprocessing token is not valid! 690141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::err_pp_invalid_directive); 6911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 692141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the PP line. 693141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 6941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 695141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we're done parsing the directive. 696141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 697141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 698478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// GetLineValue - Convert a numeric token into an unsigned value, emitting 699478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// Diagnostic DiagID if it is invalid, and returning the value in Val. 700478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnerstatic bool GetLineValue(Token &DigitTok, unsigned &Val, 701478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned DiagID, Preprocessor &PP) { 702359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner if (DigitTok.isNot(tok::numeric_constant)) { 703478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(DigitTok, DiagID); 7041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 70584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (DigitTok.isNot(tok::eod)) 706478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.DiscardUntilEndOfDirective(); 707478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 708359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 7091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 710359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner llvm::SmallString<64> IntegerBuffer; 711359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner IntegerBuffer.resize(DigitTok.getLength()); 712359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner const char *DigitTokBegin = &IntegerBuffer[0]; 713453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor bool Invalid = false; 714453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor unsigned ActualLength = PP.getSpelling(DigitTok, DigitTokBegin, &Invalid); 715453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (Invalid) 716453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor return true; 717453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor 718dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner // Verify that we have a simple digit-sequence, and compute the value. This 719dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner // is always a simple digit string computed in decimal, so we do this manually 720dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner // here. 721dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner Val = 0; 722dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner for (unsigned i = 0; i != ActualLength; ++i) { 723dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (!isdigit(DigitTokBegin[i])) { 724dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(DigitTok.getLocation(), i), 725dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner diag::err_pp_line_digit_sequence); 726dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.DiscardUntilEndOfDirective(); 727dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner return true; 728dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner } 7291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 730dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner unsigned NextVal = Val*10+(DigitTokBegin[i]-'0'); 731dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (NextVal < Val) { // overflow. 732dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.Diag(DigitTok, DiagID); 733dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.DiscardUntilEndOfDirective(); 734dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner return true; 735dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner } 736dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner Val = NextVal; 737359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 7381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Reject 0, this is needed both by #line numbers and flags. 740478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (Val == 0) { 741478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(DigitTok, DiagID); 742478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.DiscardUntilEndOfDirective(); 743478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 744359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 7451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 746dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (DigitTokBegin[0] == '0') 747dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.Diag(DigitTok.getLocation(), diag::warn_pp_line_decimal); 7481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 749478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return false; 750478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner} 751478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 7521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// HandleLineDirective - Handle #line directive: C99 6.10.4. The two 753478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// acceptable forms are: 754478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # line digit-sequence 755478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # line digit-sequence "s-char-sequence" 756478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnervoid Preprocessor::HandleLineDirective(Token &Tok) { 757478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Read the line # and string argument. Per C99 6.10.4p5, these tokens are 758478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // expanded. 759478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Token DigitTok; 760478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Lex(DigitTok); 761478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 762478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Validate the number and convert it to an unsigned. 763478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned LineNo; 764dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (GetLineValue(DigitTok, LineNo, diag::err_pp_line_requires_integer,*this)) 765478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return; 766478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 767478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Enforce C99 6.10.4p3: "The digit sequence shall not specify ... a 768478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // number greater than 2147483647". C90 requires that the line # be <= 32767. 769359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner unsigned LineLimit = Features.C99 ? 2147483648U : 32768U; 770359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner if (LineNo >= LineLimit) 771359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(DigitTok, diag::ext_pp_line_too_big) << LineLimit; 7721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7735b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner int FilenameID = -1; 774359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Token StrTok; 775359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Lex(StrTok); 776359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner 77784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the StrTok is "eod", then it wasn't present. Otherwise, it must be a 77884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // string followed by eod. 77984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (StrTok.is(tok::eod)) 780359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner ; // ok 781359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner else if (StrTok.isNot(tok::string_literal)) { 782359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(StrTok, diag::err_pp_line_invalid_filename); 783359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner DiscardUntilEndOfDirective(); 784359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner return; 785359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } else { 7865b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner // Parse and validate the string, converting it into a unique ID. 7875b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner StringLiteralParser Literal(&StrTok, 1, *this); 7885cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert(Literal.isAscii() && "Didn't allow wide strings in"); 7895b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.hadError) 7905b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 7915b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.Pascal) { 7925b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner Diag(StrTok, diag::err_pp_linemarker_invalid_filename); 7935b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 7945b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner } 79565aa6885818d4b4eea2e5a9d12085b2398148662Jay Foad FilenameID = SourceMgr.getLineTableFilenameID(Literal.GetString()); 7961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 79784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Verify that there is nothing after the string, other than EOD. Because 798ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner // of C99 6.10.4p5, macros that expand to empty tokens are ok. 799ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner CheckEndOfDirective("line", true); 800359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 8011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8024c4ea17d7f991516c37a871dfa4bbe5723fa85f0Chris Lattner SourceMgr.AddLineNote(DigitTok.getLocation(), LineNo, FilenameID); 8031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 80416629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (Callbacks) 80586d0ef74303e9164a0860ce849af597d34f937abChris Lattner Callbacks->FileChanged(CurPPLexer->getSourceLocation(), 80686d0ef74303e9164a0860ce849af597d34f937abChris Lattner PPCallbacks::RenameFile, 80716629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner SrcMgr::C_User); 808359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner} 809359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner 810478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// ReadLineMarkerFlags - Parse and validate any flags at the end of a GNU line 811478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// marker directive. 812478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnerstatic bool ReadLineMarkerFlags(bool &IsFileEntry, bool &IsFileExit, 813478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner bool &IsSystemHeader, bool &IsExternCHeader, 814478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Preprocessor &PP) { 815478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned FlagVal; 816478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Token FlagTok; 817478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 81884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 819478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag, PP)) 820478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 821478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 822478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (FlagVal == 1) { 823478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsFileEntry = true; 8241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 825478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 82684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 827478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag,PP)) 828478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 829478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } else if (FlagVal == 2) { 830478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsFileExit = true; 8311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 832137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner SourceManager &SM = PP.getSourceManager(); 833137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // If we are leaving the current presumed file, check to make sure the 834137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // presumed include stack isn't empty! 835137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner FileID CurFileID = 836e7b2b6e87dbe5b1207f77b6ff9c210a02f95bb39Chandler Carruth SM.getDecomposedExpansionLoc(FlagTok.getLocation()).first; 837137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner PresumedLoc PLoc = SM.getPresumedLoc(FlagTok.getLocation()); 838cb7b1e17b63967317ab5cc55682168cf0380519aDouglas Gregor if (PLoc.isInvalid()) 839cb7b1e17b63967317ab5cc55682168cf0380519aDouglas Gregor return true; 840cb7b1e17b63967317ab5cc55682168cf0380519aDouglas Gregor 841137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // If there is no include loc (main file) or if the include loc is in a 842137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // different physical file, then we aren't in a "1" line marker flag region. 843137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner SourceLocation IncLoc = PLoc.getIncludeLoc(); 844137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner if (IncLoc.isInvalid() || 845e7b2b6e87dbe5b1207f77b6ff9c210a02f95bb39Chandler Carruth SM.getDecomposedExpansionLoc(IncLoc).first != CurFileID) { 846137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_pop); 847137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner PP.DiscardUntilEndOfDirective(); 848137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner return true; 849137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner } 8501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 851478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 85284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 853478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag,PP)) 854478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 855478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 856478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 857478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // We must have 3 if there are still flags. 858478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (FlagVal != 3) { 859478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_flag); 8605b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner PP.DiscardUntilEndOfDirective(); 861478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 862478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 8631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 864478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsSystemHeader = true; 8651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 866478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 86784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 8689d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag, PP)) 869478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 870478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 871478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // We must have 4 if there is yet another flag. 872478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (FlagVal != 4) { 873478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_flag); 8745b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner PP.DiscardUntilEndOfDirective(); 875478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 876478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 8771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 878478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsExternCHeader = true; 8791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 880478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 88184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 882478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 883478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // There are no more valid flags here. 884478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_flag); 8855b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner PP.DiscardUntilEndOfDirective(); 886478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 887478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner} 888478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 889478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// HandleDigitDirective - Handle a GNU line marker directive, whose syntax is 890478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// one of the following forms: 891478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// 892478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # 42 8931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// # 42 "file" ('1' | '2')? 894478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # 42 "file" ('1' | '2')? '3' '4'? 895478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// 896478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnervoid Preprocessor::HandleDigitDirective(Token &DigitTok) { 897478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Validate the number and convert it to an unsigned. GNU does not have a 898478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // line # limit other than it fit in 32-bits. 899478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned LineNo; 900478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(DigitTok, LineNo, diag::err_pp_linemarker_requires_integer, 901478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner *this)) 902478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return; 9031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 904478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Token StrTok; 905478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Lex(StrTok); 9061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 907478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner bool IsFileEntry = false, IsFileExit = false; 908478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner bool IsSystemHeader = false, IsExternCHeader = false; 9095b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner int FilenameID = -1; 9105b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner 91184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the StrTok is "eod", then it wasn't present. Otherwise, it must be a 91284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // string followed by eod. 91384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (StrTok.is(tok::eod)) 914478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner ; // ok 915478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner else if (StrTok.isNot(tok::string_literal)) { 916478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Diag(StrTok, diag::err_pp_linemarker_invalid_filename); 9175b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 918478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } else { 9195b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner // Parse and validate the string, converting it into a unique ID. 9205b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner StringLiteralParser Literal(&StrTok, 1, *this); 9215cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert(Literal.isAscii() && "Didn't allow wide strings in"); 9225b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.hadError) 9235b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 9245b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.Pascal) { 9255b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner Diag(StrTok, diag::err_pp_linemarker_invalid_filename); 9265b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 9275b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner } 92865aa6885818d4b4eea2e5a9d12085b2398148662Jay Foad FilenameID = SourceMgr.getLineTableFilenameID(Literal.GetString()); 9291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 930478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // If a filename was present, read any flags that are present. 9311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (ReadLineMarkerFlags(IsFileEntry, IsFileExit, 9325b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner IsSystemHeader, IsExternCHeader, *this)) 933478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return; 934478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 9351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9369d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner // Create a line note with this information. 9379d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner SourceMgr.AddLineNote(DigitTok.getLocation(), LineNo, FilenameID, 9381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump IsFileEntry, IsFileExit, 9399d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner IsSystemHeader, IsExternCHeader); 9401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 94116629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner // If the preprocessor has callbacks installed, notify them of the #line 94216629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner // change. This is used so that the line marker comes out in -E mode for 94316629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner // example. 94416629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (Callbacks) { 94516629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner PPCallbacks::FileChangeReason Reason = PPCallbacks::RenameFile; 94616629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (IsFileEntry) 94716629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner Reason = PPCallbacks::EnterFile; 94816629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner else if (IsFileExit) 94916629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner Reason = PPCallbacks::ExitFile; 95016629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner SrcMgr::CharacteristicKind FileKind = SrcMgr::C_User; 95116629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (IsExternCHeader) 95216629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner FileKind = SrcMgr::C_ExternCSystem; 95316629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner else if (IsSystemHeader) 95416629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner FileKind = SrcMgr::C_System; 9551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 95686d0ef74303e9164a0860ce849af597d34f937abChris Lattner Callbacks->FileChanged(CurPPLexer->getSourceLocation(), Reason, FileKind); 95716629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner } 958478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner} 959478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 960478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 961099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner/// HandleUserDiagnosticDirective - Handle a #warning or #error directive. 962099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner/// 9631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::HandleUserDiagnosticDirective(Token &Tok, 964141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isWarning) { 965099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner // PTH doesn't emit #warning or #error directives. 966099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner if (CurPTHLexer) 967359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner return CurPTHLexer->DiscardToEndOfLine(); 968359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner 969141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the line raw. We do this because we don't want macros 970141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // to be expanded and we don't require that the tokens be valid preprocessing 971141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // tokens. For example, this is allowed: "#warning ` 'foo". GCC does 972141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // collapse multiple consequtive white space between tokens, but this isn't 973141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // specified by the standard. 974359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner std::string Message = CurLexer->ReadToEndOfLine(); 975359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner if (isWarning) 976359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(Tok, diag::pp_hash_warning) << Message; 977359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner else 978359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(Tok, diag::err_pp_hash_error) << Message; 979141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 980141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 981141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIdentSCCSDirective - Handle a #ident/#sccs directive. 982141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 983141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIdentSCCSDirective(Token &Tok) { 984141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, this directive is an extension. 985141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::ext_pp_ident_directive); 9861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 987141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the string argument. 988141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token StrTok; 989141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Lex(StrTok); 9901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 991141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the token kind isn't a string, it's a malformed directive. 992141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (StrTok.isNot(tok::string_literal) && 9933692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner StrTok.isNot(tok::wide_string_literal)) { 9943692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(StrTok, diag::err_pp_malformed_ident); 99584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (StrTok.isNot(tok::eod)) 996099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner DiscardUntilEndOfDirective(); 9973692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 9983692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 9991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 100084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Verify that there is nothing after the string, other than EOD. 100135410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("ident"); 1002141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1003453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (Callbacks) { 1004453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor bool Invalid = false; 1005453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor std::string Str = getSpelling(StrTok, &Invalid); 1006453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (!Invalid) 1007453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor Callbacks->Ident(Tok.getLocation(), Str); 1008453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor } 1009141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1010141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 10117143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor/// \brief Handle a #__export_macro__ directive. 10127143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregorvoid Preprocessor::HandleMacroExportDirective(Token &Tok) { 10137143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor Token MacroNameTok; 10147143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor ReadMacroName(MacroNameTok, 2); 10157143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10167143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // Error reading macro name? If so, diagnostic already issued. 10177143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor if (MacroNameTok.is(tok::eod)) 10187143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor return; 10197143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10207143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // Check to see if this is the last token on the #__export_macro__ line. 10217143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor CheckEndOfDirective("__export_macro__"); 10227143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10237143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // Okay, we finally have a valid identifier to undef. 10247143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor MacroInfo *MI = getMacroInfo(MacroNameTok.getIdentifierInfo()); 10257143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10267143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // If the macro is not defined, this is an error. 10277143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor if (MI == 0) { 10287143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor Diag(MacroNameTok, diag::err_pp_export_non_macro) 10297143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor << MacroNameTok.getIdentifierInfo(); 10307143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor return; 10317143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor } 10327143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10337143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // Note that this macro has now been exported. 10347143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor MI->setExportLocation(MacroNameTok.getLocation()); 10357143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10367143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // If this macro definition came from a PCH file, mark it 10377143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // as having changed since serialization. 10387143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor if (MI->isFromAST()) 10397143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor MI->setChangedAfterLoad(); 10407143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor} 10417143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 1042141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1043141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Include Directive Handling. 1044141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1045141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1046141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// GetIncludeFilenameSpelling - Turn the specified lexer token into a fully 1047141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// checked and spelled filename, e.g. as an operand of #include. This returns 1048141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// true if the input filename was in <>'s or false if it were in ""'s. The 1049141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// caller is expected to provide a buffer that is large enough to hold the 1050141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// spelling of the filename, but is also expected to handle the case when 1051141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// this method decides to use a different buffer. 1052141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerbool Preprocessor::GetIncludeFilenameSpelling(SourceLocation Loc, 10535f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef &Buffer) { 1054141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the text form of the filename. 1055a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner assert(!Buffer.empty() && "Can't have tokens with empty spellings!"); 10561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1057141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Make sure the filename is <x> or "x". 1058141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isAngled; 1059a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer[0] == '<') { 1060a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer.back() != '>') { 1061141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 10625f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1063141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1064141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1065141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner isAngled = true; 1066a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner } else if (Buffer[0] == '"') { 1067a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer.back() != '"') { 1068141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 10695f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1070141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1071141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1072141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner isAngled = false; 1073141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 1074141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 10755f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1076141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1077141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 10781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1079141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Diagnose #include "" as invalid. 1080a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer.size() <= 2) { 1081141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_empty_filename); 10825f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1083a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner return true; 1084141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 10851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1086141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Skip the brackets. 1087a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner Buffer = Buffer.substr(1, Buffer.size()-2); 1088141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return isAngled; 1089141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1090141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1091141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ConcatenateIncludeName - Handle cases where the #include name is expanded 1092141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// from a macro as multiple tokens, which need to be glued together. This 1093141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// occurs for code like: 1094141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #define FOO <a/b.h> 1095141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #include FOO 1096141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// because in this case, "<a/b.h>" is returned as 7 tokens, not one. 1097141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1098141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// This code concatenates and consumes tokens up to the '>' token. It returns 1099141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// false if the > was found, otherwise it returns true if it finds and consumes 110084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// the EOD marker. 1101a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompsonbool Preprocessor::ConcatenateIncludeName( 1102ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor llvm::SmallString<128> &FilenameBuffer, 1103ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor SourceLocation &End) { 1104141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token CurTok; 11051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1106a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Lex(CurTok); 110784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (CurTok.isNot(tok::eod)) { 1108ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor End = CurTok.getLocation(); 1109ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor 111025bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor // FIXME: Provide code completion for #includes. 111125bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor if (CurTok.is(tok::code_completion)) { 11127d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis setCodeCompletionReached(); 111325bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor Lex(CurTok); 111425bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor continue; 111525bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor } 111625bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor 1117141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Append the spelling of this token to the buffer. If there was a space 1118141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // before it, add it now. 1119141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.hasLeadingSpace()) 1120141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.push_back(' '); 11211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1122141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the spelling of the token, directly into FilenameBuffer if possible. 1123141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned PreAppendSize = FilenameBuffer.size(); 1124141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.resize(PreAppendSize+CurTok.getLength()); 11251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1126141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const char *BufPtr = &FilenameBuffer[PreAppendSize]; 1127a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson unsigned ActualLen = getSpelling(CurTok, BufPtr); 11281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1129141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the token was spelled somewhere else, copy it into FilenameBuffer. 1130141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (BufPtr != &FilenameBuffer[PreAppendSize]) 1131141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner memcpy(&FilenameBuffer[PreAppendSize], BufPtr, ActualLen); 11321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1133141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Resize FilenameBuffer to the correct size. 1134141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.getLength() != ActualLen) 1135141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.resize(PreAppendSize+ActualLen); 11361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1137141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we found the '>' marker, return success. 1138141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.is(tok::greater)) 1139141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 11401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1141a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Lex(CurTok); 1142141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1143141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 114484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If we hit the eod marker, emit an error and return true so that the caller 114584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // knows the EOD has been read. 1146a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Diag(CurTok.getLocation(), diag::err_pp_expects_filename); 1147141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1148141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1149141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1150141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIncludeDirective - The "#include" tokens have just been read, read the 1151141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// file to be included from the lexer, then include it! This is a common 1152141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// routine with functionality shared between #include, #include_next and 1153721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner/// #import. LookupFrom is set when this is a #include_next directive, it 11541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// specifies the file to start searching from. 1155ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleIncludeDirective(SourceLocation HashLoc, 1156ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &IncludeTok, 1157141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *LookupFrom, 1158141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isImport) { 1159141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1160141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token FilenameTok; 116160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexIncludeFilename(FilenameTok); 11621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1163141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Reserve a buffer to get the spelling. 1164a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner llvm::SmallString<128> FilenameBuffer; 11655f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Filename; 1166ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor SourceLocation End; 1167ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor 1168141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (FilenameTok.getKind()) { 116984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: 117084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the token kind is EOD, the error has already been diagnosed. 1171141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 11721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1173141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::angle_string_literal: 1174ddeea5644367c9c153c9fee9e51bdea85ce43cbdBenjamin Kramer case tok::string_literal: 1175ddeea5644367c9c153c9fee9e51bdea85ce43cbdBenjamin Kramer Filename = getSpelling(FilenameTok, FilenameBuffer); 1176ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor End = FilenameTok.getLocation(); 1177141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 11781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1179141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::less: 1180141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // This could be a <foo/bar.h> file coming from a macro expansion. In this 1181141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // case, glue the tokens together into FilenameBuffer and interpret those. 1182141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.push_back('<'); 1183ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor if (ConcatenateIncludeName(FilenameBuffer, End)) 118484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne return; // Found <eod> but no ">"? Diagnostic already emitted. 1185a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner Filename = FilenameBuffer.str(); 1186141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 1187141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 1188141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename); 1189141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 1190141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1191141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 11921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1193193575455e00eca03fd7177f60e3f2e6263cb661Kovarththanan Rajaratnam bool isAngled = 1194a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner GetIncludeFilenameSpelling(FilenameTok.getLocation(), Filename); 1195141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If GetIncludeFilenameSpelling set the start ptr to null, there was an 1196141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // error. 1197a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Filename.empty()) { 1198141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 1199141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1200141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 12011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 120284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Verify that there is nothing after the filename, other than EOD. Note that 12039cb51ce03caf0755759f7e67aea7d4be684ff738Chris Lattner // we allow macros that expand to nothing after the filename, because this 12049cb51ce03caf0755759f7e67aea7d4be684ff738Chris Lattner // falls into the category of "#include pp-tokens new-line" specified in 12059cb51ce03caf0755759f7e67aea7d4be684ff738Chris Lattner // C99 6.10.2p4. 1206e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar CheckEndOfDirective(IncludeTok.getIdentifierInfo()->getNameStart(), true); 1207141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1208141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check that we don't have infinite #include recursion. 12093692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (IncludeMacroStack.size() == MaxAllowedIncludeStackDepth-1) { 12103692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(FilenameTok, diag::err_pp_include_too_deep); 12113692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 12123692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 12131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1214141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Search include directories. 1215141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *CurDir; 12167412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek llvm::SmallString<1024> SearchPath; 12177412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek llvm::SmallString<1024> RelativePath; 1218b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth // We get the raw path only if we have 'Callbacks' to which we later pass 1219b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth // the path. 1220fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor StringRef SuggestedModule; 1221b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const FileEntry *File = LookupFile( 12227412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek Filename, isAngled, LookupFrom, CurDir, 1223fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor Callbacks ? &SearchPath : NULL, Callbacks ? &RelativePath : NULL, 1224fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor AutoModuleImport? &SuggestedModule : 0); 1225fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor 1226fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor // If we are supposed to import a module rather than including the header, 1227fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor // do so now. 1228fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor if (!SuggestedModule.empty()) { 1229fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor TheModuleLoader.loadModule(IncludeTok.getLocation(), 1230fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor Identifiers.get(SuggestedModule), 1231fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor FilenameTok.getLocation()); 1232fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor return; 1233fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor } 1234fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor 1235ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor // Notify the callback object that we've seen an inclusion directive. 1236ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor if (Callbacks) 1237b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth Callbacks->InclusionDirective(HashLoc, IncludeTok, Filename, isAngled, File, 12387412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek End, SearchPath, RelativePath); 1239b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth 1240bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne if (File == 0) { 1241f84139a1331c63c998e8b7d54148c75ac0b48ccdEli Friedman if (!SuppressIncludeNotFoundError) 1242f84139a1331c63c998e8b7d54148c75ac0b48ccdEli Friedman Diag(FilenameTok, diag::err_pp_file_not_found) << Filename; 1243bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne return; 1244bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne } 1245bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne 1246721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner // The #included file will be considered to be a system header if either it is 1247721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner // in a system include directory, or if the #includer is a system include 1248721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner // header. 12491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SrcMgr::CharacteristicKind FileCharacter = 12500b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner std::max(HeaderInfo.getFileDirFlavor(File), 1251693faa6e6918994bc22aacf078a889bb93e0fe25Chris Lattner SourceMgr.getFileCharacteristic(FilenameTok.getLocation())); 12521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12536fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner // Ask HeaderInfo if we should enter this #include file. If not, #including 12546fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner // this file will have no effect. 12556fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner if (!HeaderInfo.ShouldEnterIncludeFile(File, isImport)) { 1256e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner if (Callbacks) 12576fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner Callbacks->FileSkipped(*File, FilenameTok, FileCharacter); 12586fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner return; 12596fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner } 12606fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner 1261141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Look up the file, create a File ID for it. 12622b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = SourceMgr.createFileID(File, FilenameTok.getLocation(), 12632b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileCharacter); 1264d57b7ff9bebc4c45f325fc1be6f238cfcd4c3732Peter Collingbourne assert(!FID.isInvalid() && "Expected valid file ID"); 1265141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1266141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if all is good, enter the new file! 1267e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner EnterSourceFile(FID, CurDir, FilenameTok.getLocation()); 1268141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1269141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1270141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIncludeNextDirective - Implements #include_next. 1271141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1272ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleIncludeNextDirective(SourceLocation HashLoc, 1273ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &IncludeNextTok) { 1274141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::ext_pp_include_next_directive); 12751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1276141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #include_next is like #include, except that we start searching after 1277141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the current found directory. If we can't do this, issue a 1278141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // diagnostic. 1279141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *Lookup = CurDirLookup; 1280141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (isInPrimaryFile()) { 1281141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Lookup = 0; 1282141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::pp_include_next_in_primary); 1283141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (Lookup == 0) { 1284141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::pp_include_next_absolute_path); 1285141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 1286141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Start looking up in the next directory. 1287141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++Lookup; 1288141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 12891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1290ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeDirective(HashLoc, IncludeNextTok, Lookup); 1291141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1292141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1293141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleImportDirective - Implements #import. 1294141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1295ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleImportDirective(SourceLocation HashLoc, 1296ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &ImportTok) { 1297b627c8d683c4d3facd774c432b1fdc2d35819369Chris Lattner if (!Features.ObjC1) // #import is standard for ObjC. 1298b627c8d683c4d3facd774c432b1fdc2d35819369Chris Lattner Diag(ImportTok, diag::ext_pp_import_directive); 12991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1300ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeDirective(HashLoc, ImportTok, 0, true); 1301141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1302141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1303de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// HandleIncludeMacrosDirective - The -imacros command line option turns into a 1304de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// pseudo directive in the predefines buffer. This handles it by sucking all 1305de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// tokens through the preprocessor and discarding them (only keeping the side 1306de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// effects on the preprocessor). 1307ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleIncludeMacrosDirective(SourceLocation HashLoc, 1308ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &IncludeMacrosTok) { 1309de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner // This directive should only occur in the predefines buffer. If not, emit an 1310de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner // error and reject it. 1311de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner SourceLocation Loc = IncludeMacrosTok.getLocation(); 1312de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner if (strcmp(SourceMgr.getBufferName(Loc), "<built-in>") != 0) { 1313de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner Diag(IncludeMacrosTok.getLocation(), 1314de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner diag::pp_include_macros_out_of_predefines); 1315de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner DiscardUntilEndOfDirective(); 1316de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner return; 1317de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner } 13181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1319fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner // Treat this as a normal #include for checking purposes. If this is 1320fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner // successful, it will push a new lexer onto the include stack. 1321ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor HandleIncludeDirective(HashLoc, IncludeMacrosTok, 0, false); 13221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1323fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner Token TmpTok; 1324fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner do { 1325fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner Lex(TmpTok); 1326fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner assert(TmpTok.isNot(tok::eof) && "Didn't find end of -imacros!"); 1327fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner } while (TmpTok.isNot(tok::hashhash)); 1328de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner} 1329de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner 1330141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1331141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Macro Directive Handling. 1332141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1333141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1334141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ReadMacroDefinitionArgList - The ( starting an argument list of a macro 1335141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// definition has just been read. Lex the rest of the arguments and the 1336141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// closing ), updating MI with what we learn. Return true if an error occurs 1337141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// parsing the arg list. 1338141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerbool Preprocessor::ReadMacroDefinitionArgList(MacroInfo *MI) { 13395f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<IdentifierInfo*, 32> Arguments; 13401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1341141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 1342141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (1) { 1343141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1344141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Tok.getKind()) { 1345141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::r_paren: 1346141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Found the end of the argument list. 1347cf29e0716bb3ecbbc15b74cd648367d6b075fdf0Chris Lattner if (Arguments.empty()) // #define FOO() 1348141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 1349141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Otherwise we have #define FOO(A,) 1350141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_expected_ident_in_arg_list); 1351141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1352141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::ellipsis: // #define X(... -> C99 varargs 135370c7b10c64beed3e08da004c10ed5170c00df8f9Eli Friedman if (!Features.C99 && !Features.CPlusPlus0x) 135470c7b10c64beed3e08da004c10ed5170c00df8f9Eli Friedman Diag(Tok, diag::ext_variadic_macro); 1355141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1356141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 1357141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1358141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::r_paren)) { 1359141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 1360141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1361141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1362141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Add the __VA_ARGS__ identifier as an argument. 1363141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.push_back(Ident__VA_ARGS__); 1364141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsC99Varargs(); 1365685befeb5f6472585bae473a6389e47cab9eac67Chris Lattner MI->setArgumentList(&Arguments[0], Arguments.size(), BP); 1366141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 136784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: // #define X( 1368141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 1369141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1370141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 1371141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Handle keywords and identifiers here to accept things like 1372141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define Foo(for) for. 1373141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = Tok.getIdentifierInfo(); 1374141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) { 1375141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define X(1 1376141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_invalid_tok_in_arg_list); 1377141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1378141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1379141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1380141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is already used as an argument, it is used multiple times (e.g. 1381141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define X(A,A. 13821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (std::find(Arguments.begin(), Arguments.end(), II) != 1383141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.end()) { // C99 6.10.3p6 13846cf3ed7be70a7a9c269a65e3316884f41c7373d4Chris Lattner Diag(Tok, diag::err_pp_duplicate_name_in_arg_list) << II; 1385141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1386141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 13871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1388141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Add the argument to the macro info. 1389141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.push_back(II); 13901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1391141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 1392141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 13931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1394141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Tok.getKind()) { 1395141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: // #define X(A B 1396141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_expected_comma_in_arg_list); 1397141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1398141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::r_paren: // #define X(A) 1399685befeb5f6472585bae473a6389e47cab9eac67Chris Lattner MI->setArgumentList(&Arguments[0], Arguments.size(), BP); 1400141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 1401141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::comma: // #define X(A, 1402141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 1403141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::ellipsis: // #define X(A... -> GCC extension 1404141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Diagnose extension. 1405141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::ext_named_variadic_macro); 14061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1407141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 1408141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1409141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::r_paren)) { 1410141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 1411141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1412141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 14131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1414141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsGNUVarargs(); 1415685befeb5f6472585bae473a6389e47cab9eac67Chris Lattner MI->setArgumentList(&Arguments[0], Arguments.size(), BP); 1416141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 1417141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1418141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1419141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1420141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1421141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1422141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleDefineDirective - Implements #define. This consumes the entire macro 1423141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// line then lets the caller lex the next real token. 1424141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleDefineDirective(Token &DefineTok) { 1425141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumDefined; 1426141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1427141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 1428141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok, 1); 14291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1430141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 143184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) 1432141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1433141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 14342451b528fe114595d0f10ef2c05047928558ab0fChris Lattner Token LastTok = MacroNameTok; 14352451b528fe114595d0f10ef2c05047928558ab0fChris Lattner 1436141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we are supposed to keep comments in #defines, reenable comment saving 1437141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // mode. 1438ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepMacroComments); 14391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1440141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Create the new macro. 14410ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek MacroInfo *MI = AllocateMacroInfo(MacroNameTok.getLocation()); 14421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1443141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 1444141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 14451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1446141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a function-like macro definition, parse the argument list, 1447141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // marking each of the identifiers as being used as macro arguments. Also, 1448141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // check other constraints on the first token of the macro body. 144984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.is(tok::eod)) { 1450141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If there is no body to this macro, we have no special handling here. 14516272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } else if (Tok.hasLeadingSpace()) { 14526272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // This is a normal token with leading space. Clear the leading space 14536272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // marker on the first token to get proper expansion. 14546272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Tok.clearFlag(Token::LeadingSpace); 14556272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } else if (Tok.is(tok::l_paren)) { 1456141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // This is a function-like macro definition. Read the argument list. 1457141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsFunctionLike(); 1458141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ReadMacroDefinitionArgList(MI)) { 1459141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Forget about MI. 14600ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1461141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Throw away the rest of the line. 146260e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->ParsingPreprocessorDirective) 1463141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 1464141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1465141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1466141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 14678fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // If this is a definition of a variadic C99 function-like macro, not using 14688fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // the GNU named varargs extension, enabled __VA_ARGS__. 14691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14708fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // "Poison" __VA_ARGS__, which can only appear in the expansion of a macro. 14718fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // This gets unpoisoned where it is allowed. 14728fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner assert(Ident__VA_ARGS__->isPoisoned() && "__VA_ARGS__ should be poisoned!"); 14738fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner if (MI->isC99Varargs()) 14748fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner Ident__VA_ARGS__->setIsPoisoned(false); 14751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1476141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the first token after the arg list for down below. 1477141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 14786272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } else if (Features.C99) { 1479141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 requires whitespace between the macro definition and the body. Emit 1480141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // a diagnostic for something like "#define X+". 14816272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Diag(Tok, diag::ext_c99_whitespace_required_after_macro_name); 1482141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 14836272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // C90 6.8 TC1 says: "In the definition of an object-like macro, if the 14846272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // first character of a replacement list is not a character required by 14856272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // subclause 5.2.1, then there shall be white-space separation between the 14866272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // identifier and the replacement list.". 5.2.1 lists this set: 14876272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // "A-Za-z0-9!"#%&'()*+,_./:;<=>?[\]^_{|}~" as well as whitespace, which 14886272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // is irrelevant here. 14896272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner bool isInvalid = false; 14906272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner if (Tok.is(tok::at)) // @ is not in the list above. 14916272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner isInvalid = true; 14926272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner else if (Tok.is(tok::unknown)) { 14936272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // If we have an unknown token, it is something strange like "`". Since 14946272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // all of valid characters would have lexed into a single character 14956272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // token of some sort, we know this is not a valid case. 14966272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner isInvalid = true; 14976272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } 14986272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner if (isInvalid) 14996272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Diag(Tok, diag::ext_missing_whitespace_after_macro_name); 15006272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner else 15016272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Diag(Tok, diag::warn_missing_whitespace_after_macro_name); 1502141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15032451b528fe114595d0f10ef2c05047928558ab0fChris Lattner 150484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (!Tok.is(tok::eod)) 15052451b528fe114595d0f10ef2c05047928558ab0fChris Lattner LastTok = Tok; 15062451b528fe114595d0f10ef2c05047928558ab0fChris Lattner 1507141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the macro body. 1508141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->isObjectLike()) { 1509141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Object-like macros are very simple, just read their body. 151084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (Tok.isNot(tok::eod)) { 15112451b528fe114595d0f10ef2c05047928558ab0fChris Lattner LastTok = Tok; 1512141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->AddTokenToBody(Tok); 1513141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1514141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1515141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1517141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 15183240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Otherwise, read the body of a function-like macro. While we are at it, 15193240469102eca90fa5123ec9636fa0364df3034cChris Lattner // check C99 6.10.3.2p1: ensure that # operators are followed by macro 15203240469102eca90fa5123ec9636fa0364df3034cChris Lattner // parameters in function-like macro expansions. 152184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (Tok.isNot(tok::eod)) { 15222451b528fe114595d0f10ef2c05047928558ab0fChris Lattner LastTok = Tok; 1523141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1524141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::hash)) { 15253240469102eca90fa5123ec9636fa0364df3034cChris Lattner MI->AddTokenToBody(Tok); 15261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1527141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1528141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1529141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 1530141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1532141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1533141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 15341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15353240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Check for a valid macro arg identifier. 15363240469102eca90fa5123ec9636fa0364df3034cChris Lattner if (Tok.getIdentifierInfo() == 0 || 15373240469102eca90fa5123ec9636fa0364df3034cChris Lattner MI->getArgumentNum(Tok.getIdentifierInfo()) == -1) { 15383240469102eca90fa5123ec9636fa0364df3034cChris Lattner 15393240469102eca90fa5123ec9636fa0364df3034cChris Lattner // If this is assembler-with-cpp mode, we accept random gibberish after 15403240469102eca90fa5123ec9636fa0364df3034cChris Lattner // the '#' because '#' is often a comment character. However, change 15413240469102eca90fa5123ec9636fa0364df3034cChris Lattner // the kind of the token to tok::unknown so that the preprocessor isn't 15423240469102eca90fa5123ec9636fa0364df3034cChris Lattner // confused. 154384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (getLangOptions().AsmPreprocessor && Tok.isNot(tok::eod)) { 15443240469102eca90fa5123ec9636fa0364df3034cChris Lattner LastTok.setKind(tok::unknown); 15453240469102eca90fa5123ec9636fa0364df3034cChris Lattner } else { 15463240469102eca90fa5123ec9636fa0364df3034cChris Lattner Diag(Tok, diag::err_pp_stringize_not_parameter); 15473240469102eca90fa5123ec9636fa0364df3034cChris Lattner ReleaseMacroInfo(MI); 15481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15493240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Disable __VA_ARGS__ again. 15503240469102eca90fa5123ec9636fa0364df3034cChris Lattner Ident__VA_ARGS__->setIsPoisoned(true); 15513240469102eca90fa5123ec9636fa0364df3034cChris Lattner return; 15523240469102eca90fa5123ec9636fa0364df3034cChris Lattner } 1553141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15553240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Things look ok, add the '#' and param name tokens to the macro. 15563240469102eca90fa5123ec9636fa0364df3034cChris Lattner MI->AddTokenToBody(LastTok); 1557141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->AddTokenToBody(Tok); 15583240469102eca90fa5123ec9636fa0364df3034cChris Lattner LastTok = Tok; 15591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1560141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1561141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1562141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1563141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1566141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Disable __VA_ARGS__ again. 1567141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Ident__VA_ARGS__->setIsPoisoned(true); 1568141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1569fc8f0e14ad142ed811e90fbd9a30e419e301c717Chris Lattner // Check that there is no paste (##) operator at the beginning or end of the 1570141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // replacement list. 1571141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned NumTokens = MI->getNumTokens(); 1572141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (NumTokens != 0) { 1573141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->getReplacementToken(0).is(tok::hashhash)) { 1574141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getReplacementToken(0), diag::err_paste_at_start); 15750ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1576141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1577141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1578141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->getReplacementToken(NumTokens-1).is(tok::hashhash)) { 1579141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getReplacementToken(NumTokens-1), diag::err_paste_at_end); 15800ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1581141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1582141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1583141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15852451b528fe114595d0f10ef2c05047928558ab0fChris Lattner MI->setDefinitionEndLoc(LastTok.getLocation()); 15861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1587141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if this identifier already had a macro defined for it, verify that 1588141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the macro bodies are identical and free the old definition. 1589141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MacroInfo *OtherMI = getMacroInfo(MacroNameTok.getIdentifierInfo())) { 159041c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // It is very common for system headers to have tons of macro redefinitions 159141c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // and for warnings to be disabled in system headers. If this is the case, 159241c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // then don't bother calling MacroInfo::isIdenticalTo. 15937f549dfd7b1d3b2b09e5878eeb754efae253d557Chris Lattner if (!getDiagnostics().getSuppressSystemWarnings() || 159441c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner !SourceMgr.isInSystemHeader(DefineTok.getLocation())) { 1595a33e0504f61132ac43f4f89af43b12c87e987c20Argyrios Kyrtzidis if (!OtherMI->isUsed() && OtherMI->isWarnIfUnused()) 159641c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner Diag(OtherMI->getDefinitionLoc(), diag::pp_macro_not_used); 1597141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1598f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Macros must be identical. This means all tokens and whitespace 159941c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // separation must be the same. C99 6.10.3.2. 1600f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (!OtherMI->isAllowRedefinitionsWithoutWarning() && 1601a7e6845660f91ec611427e1db842780e1ec12bdbEli Friedman !MI->isIdenticalTo(*OtherMI, *this)) { 160241c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner Diag(MI->getDefinitionLoc(), diag::ext_pp_macro_redef) 160341c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner << MacroNameTok.getIdentifierInfo(); 160441c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner Diag(OtherMI->getDefinitionLoc(), diag::note_previous_definition); 160541c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner } 1606141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1607a33e0504f61132ac43f4f89af43b12c87e987c20Argyrios Kyrtzidis if (OtherMI->isWarnIfUnused()) 1608a33e0504f61132ac43f4f89af43b12c87e987c20Argyrios Kyrtzidis WarnUnusedMacroLocs.erase(OtherMI->getDefinitionLoc()); 16090ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(OtherMI); 1610141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 16111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1612141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner setMacroInfo(MacroNameTok.getIdentifierInfo(), MI); 16131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16140827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis assert(!MI->isUsed()); 16150827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // If we need warning for not using the macro, add its location in the 16160827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // warn-because-unused-macro set. If it gets used it will be removed from set. 16170827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis if (isInPrimaryFile() && // don't warn for include'd macros. 16180827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis Diags->getDiagnosticLevel(diag::pp_macro_not_used, 1619d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie MI->getDefinitionLoc()) != DiagnosticsEngine::Ignored) { 16200827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis MI->setIsWarnIfUnused(true); 16210827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis WarnUnusedMacroLocs.insert(MI->getDefinitionLoc()); 16220827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis } 16230827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis 1624f4a72b07747cd6ae1a9f6974e148ae504c879349Chris Lattner // If the callbacks want to know, tell them about the macro definition. 1625f4a72b07747cd6ae1a9f6974e148ae504c879349Chris Lattner if (Callbacks) 16262aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->MacroDefined(MacroNameTok, MI); 1627141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1628141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1629141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleUndefDirective - Implements #undef. 1630141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1631141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleUndefDirective(Token &UndefTok) { 1632141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumUndefined; 1633141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1634141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 1635141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok, 2); 16361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1637141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 163884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) 1639141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 16401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1641141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check to see if this is the last token on the #undef line. 164235410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("undef"); 16431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1644141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we finally have a valid identifier to undef. 1645141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MacroInfo *MI = getMacroInfo(MacroNameTok.getIdentifierInfo()); 16461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1647141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the macro is not defined, this is a noop undef, just return. 1648141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI == 0) return; 1649141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 16501f8dcfca6c57606b9f4f96404642c02562289b83Argyrios Kyrtzidis if (!MI->isUsed() && MI->isWarnIfUnused()) 1651141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getDefinitionLoc(), diag::pp_macro_not_used); 165241c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner 165341c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner // If the callbacks want to know, tell them about the macro #undef. 165441c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner if (Callbacks) 16552aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->MacroUndefined(MacroNameTok, MI); 165641c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner 16570827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis if (MI->isWarnIfUnused()) 16580827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis WarnUnusedMacroLocs.erase(MI->getDefinitionLoc()); 16590827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis 1660141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Free macro definition. 16610ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1662141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner setMacroInfo(MacroNameTok.getIdentifierInfo(), 0); 1663141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1664141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1665141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1666141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1667141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Conditional Directive Handling. 1668141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1669141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1670141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIfdefDirective - Implements the #ifdef/#ifndef directive. isIfndef is 1671141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// true when this is a #ifndef directive. ReadAnyTokensBeforeDirective is true 1672141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// if any tokens have been returned or pp-directives activated before this 1673141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #ifndef has been lexed. 1674141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1675141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIfdefDirective(Token &Result, bool isIfndef, 1676141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ReadAnyTokensBeforeDirective) { 1677141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumIf; 1678141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token DirectiveTok = Result; 1679141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1680141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 1681141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok); 16821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1683141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 168484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) { 1685141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Skip code until we get to #endif. This helps with recovery by not 1686141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // emitting an error when the #endif is reached. 1687141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner SkipExcludedConditionalBlock(DirectiveTok.getLocation(), 1688141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*Foundnonskip*/false, /*FoundElse*/false); 1689141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1690141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 16911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1692141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check to see if this is the last token on the #if[n]def line. 169335410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective(isIfndef ? "ifndef" : "ifdef"); 1694141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 169513d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner IdentifierInfo *MII = MacroNameTok.getIdentifierInfo(); 169613d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner MacroInfo *MI = getMacroInfo(MII); 1697193575455e00eca03fd7177f60e3f2e6263cb661Kovarththanan Rajaratnam 169860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) { 169913d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // If the start of a top-level #ifdef and if the macro is not defined, 170013d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // inform MIOpt that this might be the start of a proper include guard. 170113d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // Otherwise it is some other form of unknown conditional which we can't 170213d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // handle. 170313d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner if (!ReadAnyTokensBeforeDirective && MI == 0) { 1704141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(isIfndef && "#ifdef shouldn't reach here"); 170513d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner CurPPLexer->MIOpt.EnterTopLevelIFNDEF(MII); 1706141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else 170760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 1708141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1709141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1710141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If there is a macro, process it. 1711141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI) // Mark it used. 17120827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis markMacroAsUsed(MI); 17131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1714141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Should we include the stuff contained by this directive? 1715141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!MI == isIfndef) { 1716141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, remember that we are inside a conditional, then lex the next token. 17171d9c54df56391ac4740db27d551782e81189cb51Chris Lattner CurPPLexer->pushConditionalLevel(DirectiveTok.getLocation(), 17181d9c54df56391ac4740db27d551782e81189cb51Chris Lattner /*wasskip*/false, /*foundnonskip*/true, 17191d9c54df56391ac4740db27d551782e81189cb51Chris Lattner /*foundelse*/false); 1720141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 172108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // No, skip the contents of this block. 1722141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner SkipExcludedConditionalBlock(DirectiveTok.getLocation(), 17231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump /*Foundnonskip*/false, 1724141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*FoundElse*/false); 1725141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 172608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 172708985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) { 172808985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (isIfndef) 17292aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->Ifndef(MacroNameTok); 173008985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein else 17312aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->Ifdef(MacroNameTok); 173208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein } 1733141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1734141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1735141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIfDirective - Implements the #if directive. 1736141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1737141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIfDirective(Token &IfToken, 1738141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ReadAnyTokensBeforeDirective) { 1739141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumIf; 17401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 174108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // Parse and evaluate the conditional expression. 1742141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *IfNDefMacro = 0; 174308985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalBegin = CurPPLexer->getSourceLocation(); 174408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const bool ConditionalTrue = EvaluateDirectiveExpression(IfNDefMacro); 174508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalEnd = CurPPLexer->getSourceLocation(); 17460049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes 17470049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes // If this condition is equivalent to #ifndef X, and if this is the first 17480049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes // directive seen, handle it for the multiple-include optimization. 174960e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) { 175013d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner if (!ReadAnyTokensBeforeDirective && IfNDefMacro && ConditionalTrue) 175160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelIFNDEF(IfNDefMacro); 17520049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes else 175360e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 17540049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes } 17550049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes 1756141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Should we include the stuff contained by this directive? 1757141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ConditionalTrue) { 1758141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, remember that we are inside a conditional, then lex the next token. 175960e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->pushConditionalLevel(IfToken.getLocation(), /*wasskip*/false, 1760141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*foundnonskip*/true, /*foundelse*/false); 1761141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 176208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // No, skip the contents of this block. 17631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SkipExcludedConditionalBlock(IfToken.getLocation(), /*Foundnonskip*/false, 1764141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*FoundElse*/false); 1765141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 176608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 176708985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 176808985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->If(SourceRange(ConditionalBegin, ConditionalEnd)); 1769141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1770141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1771141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleEndifDirective - Implements the #endif directive. 1772141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1773141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleEndifDirective(Token &EndifToken) { 1774141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumEndif; 17751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1776141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check that this is the whole directive. 177735410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("endif"); 17781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1779141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CondInfo; 178060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->popConditionalLevel(CondInfo)) { 1781141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // No conditionals on the stack: this is an #endif without an #if. 17823692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(EndifToken, diag::err_pp_endif_without_if); 17833692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1784141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 17851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1786141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this the end of a top-level #endif, inform MIOpt. 178760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) 178860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.ExitTopLevelConditional(); 17891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 179060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek assert(!CondInfo.WasSkipping && !CurPPLexer->LexingRawMode && 1791141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner "This code should only be reachable in the non-skipping case!"); 1792141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 179308985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 179408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->Endif(); 179508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein} 1796141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 179708985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// HandleElseDirective - Implements the #else directive. 179808985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// 1799141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleElseDirective(Token &Result) { 1800141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumElse; 18011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1802141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #else directive in a non-skipping conditional... start skipping. 180335410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("else"); 18041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1805141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CI; 18063692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (CurPPLexer->popConditionalLevel(CI)) { 18073692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(Result, diag::pp_err_else_without_if); 18083692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 18093692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 18101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1811141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a top-level #else, inform the MIOpt. 181260e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) 181360e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 1814141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1815141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #else with a #else before it, report the error. 1816141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CI.FoundElse) Diag(Result, diag::pp_err_else_after_else); 18171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 181808985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // Finally, skip the rest of the contents of this block. 181908985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein SkipExcludedConditionalBlock(CI.IfLoc, /*Foundnonskip*/true, 182008985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein /*FoundElse*/true); 182108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 182208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 182308985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->Else(); 1824141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1825141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 182608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// HandleElifDirective - Implements the #elif directive. 182708985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// 1828141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleElifDirective(Token &ElifToken) { 1829141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumElse; 18301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1831141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #elif directive in a non-skipping conditional... start skipping. 1832141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We don't care what the condition is, because we will always skip it (since 1833141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the block immediately before it was included). 183408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalBegin = CurPPLexer->getSourceLocation(); 1835141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 183608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalEnd = CurPPLexer->getSourceLocation(); 1837141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1838141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CI; 18393692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (CurPPLexer->popConditionalLevel(CI)) { 18403692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(ElifToken, diag::pp_err_elif_without_if); 18413692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 18423692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 18431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1844141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a top-level #elif, inform the MIOpt. 184560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) 184660e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 18471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1848141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #elif with a #else before it, report the error. 1849141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CI.FoundElse) Diag(ElifToken, diag::pp_err_elif_after_else); 1850141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 185108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // Finally, skip the rest of the contents of this block. 185208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein SkipExcludedConditionalBlock(CI.IfLoc, /*Foundnonskip*/true, 185308985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein /*FoundElse*/CI.FoundElse); 185408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 185508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 185608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->Elif(SourceRange(ConditionalBegin, ConditionalEnd)); 1857141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1858