PPDirectives.cpp revision c69c42e939e6bdaa56d162cc36da4f6b6c53e8db
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, 1966b4ff04dd22e7159887ea6c1bb8b1c01fc9c70a9Argyrios Kyrtzidis bool FoundElse, 1976b4ff04dd22e7159887ea6c1bb8b1c01fc9c70a9Argyrios Kyrtzidis SourceLocation ElseLoc) { 198141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumSkipped; 199f6452c5421c5db5a7ceff581525f286931d97f1aTed Kremenek assert(CurTokenLexer == 0 && CurPPLexer && "Lexing a macro, not a file?"); 200141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 20160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->pushConditionalLevel(IfTokenLoc, /*isSkipping*/false, 202141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FoundNonSkipPortion, FoundElse); 2031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 204268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CurPTHLexer) { 205268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PTHSkipExcludedConditionalBlock(); 206268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return; 207268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 2081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 209141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Enter raw mode to disable identifier lookup (and thus macro expansion), 210141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // disabling warnings, etc. 21160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = true; 212141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 213141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (1) { 2142c6b193d574e0780ff0b8450ce1fde105f4881acChris Lattner CurLexer->Lex(Tok); 2151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 216f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor if (Tok.is(tok::code_completion)) { 217f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor if (CodeComplete) 218f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor CodeComplete->CodeCompleteInConditionalExclusion(); 2197d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis setCodeCompletionReached(); 220f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor continue; 221f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor } 222f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor 223141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is the end of the buffer, we have an error. 224141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.is(tok::eof)) { 225141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Emit errors for each unterminated conditional on the stack, including 226141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the current one. 22760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek while (!CurPPLexer->ConditionalStack.empty()) { 2287d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis if (CurLexer->getFileLoc() != CodeCompletionFileLoc) 2292d474ba9e8ae43a1a5a9f72718c0d79092b9453fDouglas Gregor Diag(CurPPLexer->ConditionalStack.back().IfLoc, 2302d474ba9e8ae43a1a5a9f72718c0d79092b9453fDouglas Gregor diag::err_pp_unterminated_conditional); 23160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ConditionalStack.pop_back(); 2321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 2331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 234141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Just return and let the caller lex after this #include. 235141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 236141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 2371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 238141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this token is not a preprocessor directive, just skip it. 239141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::hash) || !Tok.isAtStartOfLine()) 240141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 2411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 242141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We just parsed a # character at the start of a line, so we're in 243141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // directive mode. Tell the lexer this so any newlines we see will be 24484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // converted into an EOD token (this terminates the macro). 24560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = true; 246ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(false); 247141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 2481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 249141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the next token, the directive flavor. 250141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 2511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 252141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this isn't an identifier directive (e.g. is "# 1\n" or "#\n", or 253141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // something bogus), skip it. 254c4bf2b9afb7d47445a9dc6bc848657098a4e3851Abramo Bagnara if (Tok.isNot(tok::raw_identifier)) { 25560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 256141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 257ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 258141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 259141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 260141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 261141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the first letter isn't i or e, it isn't intesting to us. We know that 262141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // this is safe in the face of spelling differences, because there is no way 263141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // to spell an i/e in a strange way that is another letter. Skipping this 264141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // allows us to avoid looking up the identifier info for #define/#undef and 265141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // other common directives. 266c4bf2b9afb7d47445a9dc6bc848657098a4e3851Abramo Bagnara const char *RawCharData = Tok.getRawIdentifierData(); 267c4bf2b9afb7d47445a9dc6bc848657098a4e3851Abramo Bagnara 268141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner char FirstChar = RawCharData[0]; 2691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (FirstChar >= 'a' && FirstChar <= 'z' && 270141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FirstChar != 'i' && FirstChar != 'e') { 27160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 272141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 273ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 274141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 275141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 2761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 277141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the identifier name without trigraphs or embedded newlines. Note 278141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // that we can't use Tok.getIdentifierInfo() because its lookup is disabled 279141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // when skipping. 280b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer char DirectiveBuf[20]; 2815f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Directive; 282141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!Tok.needsCleaning() && Tok.getLength() < 20) { 2835f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Directive = StringRef(RawCharData, Tok.getLength()); 284141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 285141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner std::string DirectiveStr = getSpelling(Tok); 286b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer unsigned IdLen = DirectiveStr.size(); 287141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (IdLen >= 20) { 28860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 289141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 290ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 291141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 292141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 293b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer memcpy(DirectiveBuf, &DirectiveStr[0], IdLen); 2945f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Directive = StringRef(DirectiveBuf, IdLen); 295141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 2961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 297b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer if (Directive.startswith("if")) { 2985f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Sub = Directive.substr(2); 299b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer if (Sub.empty() || // "if" 300b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer Sub == "def" || // "ifdef" 301b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer Sub == "ndef") { // "ifndef" 302141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We know the entire #if/#ifdef/#ifndef block will be skipped, don't 303141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // bother parsing the condition. 304141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 30560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->pushConditionalLevel(Tok.getLocation(), /*wasskipping*/true, 306141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*foundnonskip*/false, 3073a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth /*foundelse*/false); 3083a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth 3093a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth if (Callbacks) 3103a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth Callbacks->Endif(); 311141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 312b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer } else if (Directive[0] == 'e') { 3135f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Sub = Directive.substr(1); 314b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer if (Sub == "ndif") { // "endif" 31535410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("endif"); 316141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CondInfo; 317141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.WasSkipping = true; // Silence bogus warning. 31860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek bool InCond = CurPPLexer->popConditionalLevel(CondInfo); 319c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)InCond; // Silence warning in no-asserts mode. 320141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(!InCond && "Can't be skipping if not in a conditional!"); 3211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 322141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we popped the outermost skipping block, we're done skipping! 323141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!CondInfo.WasSkipping) 324141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 325b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer } else if (Sub == "lse") { // "else". 326141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #else directive in a skipping conditional. If not in some other 327141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // skipping conditional, and if #else hasn't already been seen, enter it 328141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // as a non-skipping conditional. 32960e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek PPConditionalInfo &CondInfo = CurPPLexer->peekConditionalLevel(); 3301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 331141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #else with a #else before it, report the error. 332141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.FoundElse) Diag(Tok, diag::pp_err_else_after_else); 3331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 334141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Note that we've seen a #else in this conditional. 335141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundElse = true; 3361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3373a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth if (Callbacks) 3383a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth Callbacks->Else(); 3393a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth 340141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the conditional is at the top level, and the #if block wasn't 341141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // entered, enter the #else block now. 342141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!CondInfo.WasSkipping && !CondInfo.FoundNonSkip) { 343141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundNonSkip = true; 344e26224e61c8a3b607c73c52f2cd0344065d7b412Argyrios Kyrtzidis CheckEndOfDirective("else"); 345141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 346e26224e61c8a3b607c73c52f2cd0344065d7b412Argyrios Kyrtzidis } else { 347e26224e61c8a3b607c73c52f2cd0344065d7b412Argyrios Kyrtzidis DiscardUntilEndOfDirective(); // C99 6.10p4. 348141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 349b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer } else if (Sub == "lif") { // "elif". 35060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek PPConditionalInfo &CondInfo = CurPPLexer->peekConditionalLevel(); 351141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 352141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ShouldEnter; 3533a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth const SourceLocation ConditionalBegin = CurPPLexer->getSourceLocation(); 354141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is in a skipping block or if we're already handled this #if 355141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // block, don't bother parsing the condition. 356141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.WasSkipping || CondInfo.FoundNonSkip) { 357141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 358141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ShouldEnter = false; 359141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 360141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore the value of LexingRawMode so that identifiers are 361141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // looked up, etc, inside the #elif expression. 36260e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek assert(CurPPLexer->LexingRawMode && "We have to be skipping here!"); 36360e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = false; 364141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *IfNDefMacro = 0; 365141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ShouldEnter = EvaluateDirectiveExpression(IfNDefMacro); 36660e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = true; 367141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 3683a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth const SourceLocation ConditionalEnd = CurPPLexer->getSourceLocation(); 3691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 370141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #elif with a #else before it, report the error. 371141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.FoundElse) Diag(Tok, diag::pp_err_elif_after_else); 3721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3733a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth if (Callbacks) 3743a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth Callbacks->Elif(SourceRange(ConditionalBegin, ConditionalEnd)); 3753a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth 376141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this condition is true, enter it! 377141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ShouldEnter) { 378141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundNonSkip = true; 379141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 380141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 381141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 382141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 3831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 38460e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 385141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 386ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 387141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 388141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 389141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if we are out of the conditional (saw an #endif or ran off the end 390141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // of the file, just stop skipping and return to lexing whatever came after 391141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the #if block. 39260e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = false; 3936b4ff04dd22e7159887ea6c1bb8b1c01fc9c70a9Argyrios Kyrtzidis 3946b4ff04dd22e7159887ea6c1bb8b1c01fc9c70a9Argyrios Kyrtzidis if (Callbacks) { 3956b4ff04dd22e7159887ea6c1bb8b1c01fc9c70a9Argyrios Kyrtzidis SourceLocation BeginLoc = ElseLoc.isValid() ? ElseLoc : IfTokenLoc; 3966b4ff04dd22e7159887ea6c1bb8b1c01fc9c70a9Argyrios Kyrtzidis Callbacks->SourceRangeSkipped(SourceRange(BeginLoc, Tok.getLocation())); 3976b4ff04dd22e7159887ea6c1bb8b1c01fc9c70a9Argyrios Kyrtzidis } 398141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 399141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 400268ee7016a2811803989487c0ad3799486092c63Ted Kremenekvoid Preprocessor::PTHSkipExcludedConditionalBlock() { 4011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump while (1) { 403268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPTHLexer); 404268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPTHLexer->LexingRawMode == false); 4051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 406268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Skip to the next '#else', '#elif', or #endif. 407268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CurPTHLexer->SkipBlock()) { 408268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // We have reached an #endif. Both the '#' and 'endif' tokens 409268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // have been consumed by the PTHLexer. Just pop off the condition level. 410268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PPConditionalInfo CondInfo; 411268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool InCond = CurPTHLexer->popConditionalLevel(CondInfo); 412c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)InCond; // Silence warning in no-asserts mode. 413268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(!InCond && "Can't be skipping if not in a conditional!"); 414268ee7016a2811803989487c0ad3799486092c63Ted Kremenek break; 415268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 4161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 417268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // We have reached a '#else' or '#elif'. Lex the next token to get 418268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // the directive flavor. 419268ee7016a2811803989487c0ad3799486092c63Ted Kremenek Token Tok; 420268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LexUnexpandedToken(Tok); 4211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 422268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // We can actually look up the IdentifierInfo here since we aren't in 423268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // raw mode. 424268ee7016a2811803989487c0ad3799486092c63Ted Kremenek tok::PPKeywordKind K = Tok.getIdentifierInfo()->getPPKeywordID(); 425268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 426268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (K == tok::pp_else) { 427268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #else: Enter the else condition. We aren't in a nested condition 428268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // since we skip those. We're always in the one matching the last 429268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // blocked we skipped. 430268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PPConditionalInfo &CondInfo = CurPTHLexer->peekConditionalLevel(); 431268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Note that we've seen a #else in this conditional. 432268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CondInfo.FoundElse = true; 4331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 434268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If the #if block wasn't entered then enter the #else block now. 435268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (!CondInfo.FoundNonSkip) { 436268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CondInfo.FoundNonSkip = true; 4371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 43884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Scan until the eod token. 439e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = true; 4408533bd5a32a12c51341e82d2aef083acbac7c04cDaniel Dunbar DiscardUntilEndOfDirective(); 441e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = false; 4421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 443268ee7016a2811803989487c0ad3799486092c63Ted Kremenek break; 444268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 4451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 446268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise skip this block. 447268ee7016a2811803989487c0ad3799486092c63Ted Kremenek continue; 448268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 4491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 450268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(K == tok::pp_elif); 451268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PPConditionalInfo &CondInfo = CurPTHLexer->peekConditionalLevel(); 452268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 453268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If this is a #elif with a #else before it, report the error. 454268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CondInfo.FoundElse) 455268ee7016a2811803989487c0ad3799486092c63Ted Kremenek Diag(Tok, diag::pp_err_elif_after_else); 4561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 457268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If this is in a skipping block or if we're already handled this #if 4581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // block, don't bother parsing the condition. We just skip this block. 459268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CondInfo.FoundNonSkip) 460268ee7016a2811803989487c0ad3799486092c63Ted Kremenek continue; 461268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 462268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Evaluate the condition of the #elif. 463268ee7016a2811803989487c0ad3799486092c63Ted Kremenek IdentifierInfo *IfNDefMacro = 0; 464268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = true; 465268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool ShouldEnter = EvaluateDirectiveExpression(IfNDefMacro); 466268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = false; 467268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 468268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If this condition is true, enter it! 469268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (ShouldEnter) { 470268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CondInfo.FoundNonSkip = true; 471268ee7016a2811803989487c0ad3799486092c63Ted Kremenek break; 472268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 473268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 474268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, skip this block and go to the next one. 475268ee7016a2811803989487c0ad3799486092c63Ted Kremenek continue; 476268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 477268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 478268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 4791072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// LookupFile - Given a "foo" or <foo> reference, look up the indicated file, 4801072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// return null on failure. isAngled indicates whether the file reference is 4811072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// for system #include's or not (i.e. using <> instead of ""). 482b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruthconst FileEntry *Preprocessor::LookupFile( 4835f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Filename, 484b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth bool isAngled, 485b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const DirectoryLookup *FromDir, 486b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const DirectoryLookup *&CurDir, 4875f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<char> *SearchPath, 488fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor SmallVectorImpl<char> *RelativePath, 489c69c42e939e6bdaa56d162cc36da4f6b6c53e8dbDouglas Gregor ModuleMap::Module **SuggestedModule) { 4901072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // If the header lookup mechanism may be relative to the current file, pass in 4911072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // info about where the current file is. 49210fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor const FileEntry *CurFileEnt = 0; 4931072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if (!FromDir) { 4942b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = getCurrentFileLexer()->getFileID(); 49510fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor CurFileEnt = SourceMgr.getFileEntryForID(FID); 4961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 497be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner // If there is no file entry associated with this file, it must be the 498be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner // predefines buffer. Any other file is not lexed with a normal lexer, so 49910fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // it won't be scanned for preprocessor directives. If we have the 50010fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // predefines buffer, resolve #include references (which come from the 50110fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // -include command line argument) as if they came from the main file, this 50210fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // affects file lookup etc. 50310fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor if (CurFileEnt == 0) { 504be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner FID = SourceMgr.getMainFileID(); 505be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner CurFileEnt = SourceMgr.getFileEntryForID(FID); 506be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner } 5071072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5091072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Do a standard file entry lookup. 5101072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner CurDir = CurDirLookup; 511b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const FileEntry *FE = HeaderInfo.LookupFile( 5127412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek Filename, isAngled, FromDir, CurDir, CurFileEnt, 513fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor SearchPath, RelativePath, SuggestedModule); 514f45b646244705410866d62f1d8bf017a047ed662Chris Lattner if (FE) return FE; 5151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5161072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Otherwise, see if this is a subframework header. If so, this is relative 5171072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // to one of the headers on the #include stack. Walk the list of the current 5181072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // headers on the #include stack and pass them to HeaderInfo. 519fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor // FIXME: SuggestedModule! 52081d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer()) { 52141938c8493b4380df738263166b746eacb33c309Ted Kremenek if ((CurFileEnt = SourceMgr.getFileEntryForID(CurPPLexer->getFileID()))) 522b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth if ((FE = HeaderInfo.LookupSubframeworkHeader(Filename, CurFileEnt, 5237412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek SearchPath, RelativePath))) 5241072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return FE; 5251072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5271072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner for (unsigned i = 0, e = IncludeMacroStack.size(); i != e; ++i) { 5281072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner IncludeStackInfo &ISEntry = IncludeMacroStack[e-i-1]; 52981d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer(ISEntry)) { 5301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if ((CurFileEnt = 53141938c8493b4380df738263166b746eacb33c309Ted Kremenek SourceMgr.getFileEntryForID(ISEntry.ThePPLexer->getFileID()))) 5327412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek if ((FE = HeaderInfo.LookupSubframeworkHeader( 5337412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek Filename, CurFileEnt, SearchPath, RelativePath))) 5341072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return FE; 5351072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5361072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5381072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Otherwise, we really couldn't find the file. 5391072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return 0; 5401072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner} 5411072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner 542141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 543141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 544141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Directive Handling. 545141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 546141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 547141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleDirective - This callback is invoked when the lexer sees a # token 5481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// at the start of a line. This consumes the directive, modifies the 549141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// lexer/preprocessor state, and advances the lexer(s) so that the next token 550141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// read is the correct one. 551141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleDirective(Token &Result) { 552141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // FIXME: Traditional: # with whitespace before it not recognized by K&R? 5531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 554141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We just parsed a # character at the start of a line, so we're in directive 555141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // mode. Tell the lexer this so any newlines we see will be converted into an 55684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // EOD token (which terminates the directive). 55760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = true; 5581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 559141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumDirectives; 560193575455e00eca03fd7177f60e3f2e6263cb661Kovarththanan Rajaratnam 561141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We are about to read a token. For the multiple-include optimization FA to 5621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // work, we have to remember if we had read any tokens *before* this 563141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // pp-directive. 5641d9c54df56391ac4740db27d551782e81189cb51Chris Lattner bool ReadAnyTokensBeforeDirective =CurPPLexer->MIOpt.getHasReadAnyTokensVal(); 5651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 56642aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // Save the '#' token in case we need to return it later. 56742aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner Token SavedHash = Result; 5681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 569141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the next token, the directive flavor. This isn't expanded due to 570141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3p8. 571141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Result); 5721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 573141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3p11: Is this preprocessor directive in macro invocation? e.g.: 574141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define A(x) #x 575141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // A(abc 576141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #warning blah 577141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // def) 578141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If so, the user is relying on non-portable behavior, emit a diagnostic. 579141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (InMacroArgs) 580141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::ext_embedded_directive); 5811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 582141e71fec621f65ab401dbe66609f7d3c033c6a5Chris LattnerTryAgain: 583141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Result.getKind()) { 58484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: 585141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; // null directive. 586141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::comment: 587141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Handle stuff like "# /*foo*/ define X" in -E -C mode. 588141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Result); 589141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner goto TryAgain; 590f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor case tok::code_completion: 591f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor if (CodeComplete) 592f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor CodeComplete->CodeCompleteDirective( 593f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor CurPPLexer->getConditionalStackDepth() > 0); 5947d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis setCodeCompletionReached(); 595f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor return; 596478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner case tok::numeric_constant: // # 7 GNU line marker directive. 5975f607c4b75abeedded11eff079dee73561d98203Chris Lattner if (getLangOptions().AsmPreprocessor) 5985f607c4b75abeedded11eff079dee73561d98203Chris Lattner break; // # 4 is not a preprocessor directive in .S files. 599478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return HandleDigitDirective(Result); 600141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 601141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = Result.getIdentifierInfo(); 602141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) break; // Not an identifier. 6031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 604141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Ask what the preprocessor keyword ID is. 605141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (II->getPPKeywordID()) { 606141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: break; 607141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.1 - Conditional Inclusion. 608141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_if: 609141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfDirective(Result, ReadAnyTokensBeforeDirective); 610141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ifdef: 611141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfdefDirective(Result, false, true/*not valid for miopt*/); 612141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ifndef: 613141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfdefDirective(Result, true, ReadAnyTokensBeforeDirective); 614141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_elif: 615141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleElifDirective(Result); 616141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_else: 617141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleElseDirective(Result); 618141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_endif: 619141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleEndifDirective(Result); 6201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 621141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.2 - Source File Inclusion. 622141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_include: 623ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor // Handle #include. 624ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeDirective(SavedHash.getLocation(), Result); 625b8e240ed8b8f58c7b7fe82776bd6147b437f5d53Chris Lattner case tok::pp___include_macros: 626ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor // Handle -imacros. 627ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeMacrosDirective(SavedHash.getLocation(), Result); 6281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 629141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3 - Macro Replacement. 630141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_define: 631141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleDefineDirective(Result); 632141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_undef: 633141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUndefDirective(Result); 634141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 635141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.4 - Line Control. 636141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_line: 637359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner return HandleLineDirective(Result); 6381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 639141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.5 - Error Directive. 640141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_error: 641141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUserDiagnosticDirective(Result, false); 6421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 643141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.6 - Pragma Directive. 644141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_pragma: 64580c60f72848896f867f6b7e664e7060d9e78f019Douglas Gregor return HandlePragmaDirective(PIK_HashPragma); 6461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 647141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // GNU Extensions. 648141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_import: 649ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleImportDirective(SavedHash.getLocation(), Result); 650141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_include_next: 651ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeNextDirective(SavedHash.getLocation(), Result); 6521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 653141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_warning: 654141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::ext_pp_warning_directive); 655141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUserDiagnosticDirective(Result, true); 656141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ident: 657141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIdentSCCSDirective(Result); 658141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_sccs: 659141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIdentSCCSDirective(Result); 660141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_assert: 661141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner //isExtension = true; // FIXME: implement #assert 662141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 663141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_unassert: 664141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner //isExtension = true; // FIXME: implement #unassert 665141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 6667143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 6677143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor case tok::pp___export_macro__: 6687143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor return HandleMacroExportDirective(Result); 669aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor case tok::pp___private_macro__: 670aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor return HandleMacroPrivateDirective(Result); 671141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 672141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 673141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 6741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 67542aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // If this is a .S file, treat unknown # directives as non-preprocessor 67642aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // directives. This is important because # may be a comment or introduce 67742aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // various pseudo-ops. Just return the # token and push back the following 67842aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // token to be lexed next time. 67942aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner if (getLangOptions().AsmPreprocessor) { 6803d399a010102966158f6b69b07d636f113dc6ab4Daniel Dunbar Token *Toks = new Token[2]; 68142aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // Return the # and the token after it. 6821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Toks[0] = SavedHash; 68342aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner Toks[1] = Result; 684ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner 685ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner // If the second token is a hashhash token, then we need to translate it to 686ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner // unknown so the token lexer doesn't try to perform token pasting. 687ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner if (Result.is(tok::hashhash)) 688ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner Toks[1].setKind(tok::unknown); 689ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner 69042aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // Enter this token stream so that we re-lex the tokens. Make sure to 69142aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // enable macro expansion, in case the token after the # is an identifier 69242aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // that is expanded. 69342aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner EnterTokenStream(Toks, 2, false, true); 69442aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner return; 69542aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner } 6961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 697141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we reached here, the preprocessing token is not valid! 698141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::err_pp_invalid_directive); 6991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 700141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the PP line. 701141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 7021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 703141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we're done parsing the directive. 704141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 705141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 706478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// GetLineValue - Convert a numeric token into an unsigned value, emitting 707478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// Diagnostic DiagID if it is invalid, and returning the value in Val. 708478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnerstatic bool GetLineValue(Token &DigitTok, unsigned &Val, 709478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned DiagID, Preprocessor &PP) { 710359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner if (DigitTok.isNot(tok::numeric_constant)) { 711478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(DigitTok, DiagID); 7121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 71384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (DigitTok.isNot(tok::eod)) 714478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.DiscardUntilEndOfDirective(); 715478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 716359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 7171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 718359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner llvm::SmallString<64> IntegerBuffer; 719359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner IntegerBuffer.resize(DigitTok.getLength()); 720359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner const char *DigitTokBegin = &IntegerBuffer[0]; 721453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor bool Invalid = false; 722453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor unsigned ActualLength = PP.getSpelling(DigitTok, DigitTokBegin, &Invalid); 723453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (Invalid) 724453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor return true; 725453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor 726dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner // Verify that we have a simple digit-sequence, and compute the value. This 727dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner // is always a simple digit string computed in decimal, so we do this manually 728dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner // here. 729dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner Val = 0; 730dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner for (unsigned i = 0; i != ActualLength; ++i) { 731dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (!isdigit(DigitTokBegin[i])) { 732dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(DigitTok.getLocation(), i), 733dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner diag::err_pp_line_digit_sequence); 734dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.DiscardUntilEndOfDirective(); 735dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner return true; 736dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner } 7371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 738dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner unsigned NextVal = Val*10+(DigitTokBegin[i]-'0'); 739dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (NextVal < Val) { // overflow. 740dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.Diag(DigitTok, DiagID); 741dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.DiscardUntilEndOfDirective(); 742dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner return true; 743dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner } 744dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner Val = NextVal; 745359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 7461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Reject 0, this is needed both by #line numbers and flags. 748478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (Val == 0) { 749478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(DigitTok, DiagID); 750478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.DiscardUntilEndOfDirective(); 751478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 752359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 7531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 754dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (DigitTokBegin[0] == '0') 755dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.Diag(DigitTok.getLocation(), diag::warn_pp_line_decimal); 7561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 757478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return false; 758478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner} 759478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 7601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// HandleLineDirective - Handle #line directive: C99 6.10.4. The two 761478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// acceptable forms are: 762478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # line digit-sequence 763478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # line digit-sequence "s-char-sequence" 764478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnervoid Preprocessor::HandleLineDirective(Token &Tok) { 765478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Read the line # and string argument. Per C99 6.10.4p5, these tokens are 766478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // expanded. 767478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Token DigitTok; 768478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Lex(DigitTok); 769478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 770478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Validate the number and convert it to an unsigned. 771478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned LineNo; 772dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (GetLineValue(DigitTok, LineNo, diag::err_pp_line_requires_integer,*this)) 773478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return; 774478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 775478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Enforce C99 6.10.4p3: "The digit sequence shall not specify ... a 776478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // number greater than 2147483647". C90 requires that the line # be <= 32767. 777158ebfba7545b3a9947f87bed83ea710df95ac3dEli Friedman unsigned LineLimit = 32768U; 778158ebfba7545b3a9947f87bed83ea710df95ac3dEli Friedman if (Features.C99 || Features.CPlusPlus0x) 779158ebfba7545b3a9947f87bed83ea710df95ac3dEli Friedman LineLimit = 2147483648U; 780359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner if (LineNo >= LineLimit) 781359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(DigitTok, diag::ext_pp_line_too_big) << LineLimit; 782661a99690bc133bbaa029da925481d4a860dec90Richard Smith else if (Features.CPlusPlus0x && LineNo >= 32768U) 783661a99690bc133bbaa029da925481d4a860dec90Richard Smith Diag(DigitTok, diag::warn_cxx98_compat_pp_line_too_big); 7841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7855b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner int FilenameID = -1; 786359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Token StrTok; 787359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Lex(StrTok); 788359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner 78984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the StrTok is "eod", then it wasn't present. Otherwise, it must be a 79084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // string followed by eod. 79184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (StrTok.is(tok::eod)) 792359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner ; // ok 793359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner else if (StrTok.isNot(tok::string_literal)) { 794359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(StrTok, diag::err_pp_line_invalid_filename); 795359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner DiscardUntilEndOfDirective(); 796359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner return; 797359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } else { 7985b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner // Parse and validate the string, converting it into a unique ID. 7995b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner StringLiteralParser Literal(&StrTok, 1, *this); 8005cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert(Literal.isAscii() && "Didn't allow wide strings in"); 8015b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.hadError) 8025b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 8035b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.Pascal) { 8045b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner Diag(StrTok, diag::err_pp_linemarker_invalid_filename); 8055b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 8065b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner } 80765aa6885818d4b4eea2e5a9d12085b2398148662Jay Foad FilenameID = SourceMgr.getLineTableFilenameID(Literal.GetString()); 8081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 80984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Verify that there is nothing after the string, other than EOD. Because 810ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner // of C99 6.10.4p5, macros that expand to empty tokens are ok. 811ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner CheckEndOfDirective("line", true); 812359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 8131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8144c4ea17d7f991516c37a871dfa4bbe5723fa85f0Chris Lattner SourceMgr.AddLineNote(DigitTok.getLocation(), LineNo, FilenameID); 8151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 81616629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (Callbacks) 81786d0ef74303e9164a0860ce849af597d34f937abChris Lattner Callbacks->FileChanged(CurPPLexer->getSourceLocation(), 81886d0ef74303e9164a0860ce849af597d34f937abChris Lattner PPCallbacks::RenameFile, 81916629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner SrcMgr::C_User); 820359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner} 821359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner 822478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// ReadLineMarkerFlags - Parse and validate any flags at the end of a GNU line 823478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// marker directive. 824478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnerstatic bool ReadLineMarkerFlags(bool &IsFileEntry, bool &IsFileExit, 825478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner bool &IsSystemHeader, bool &IsExternCHeader, 826478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Preprocessor &PP) { 827478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned FlagVal; 828478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Token FlagTok; 829478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 83084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 831478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag, PP)) 832478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 833478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 834478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (FlagVal == 1) { 835478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsFileEntry = true; 8361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 837478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 83884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 839478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag,PP)) 840478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 841478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } else if (FlagVal == 2) { 842478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsFileExit = true; 8431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 844137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner SourceManager &SM = PP.getSourceManager(); 845137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // If we are leaving the current presumed file, check to make sure the 846137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // presumed include stack isn't empty! 847137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner FileID CurFileID = 848e7b2b6e87dbe5b1207f77b6ff9c210a02f95bb39Chandler Carruth SM.getDecomposedExpansionLoc(FlagTok.getLocation()).first; 849137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner PresumedLoc PLoc = SM.getPresumedLoc(FlagTok.getLocation()); 850cb7b1e17b63967317ab5cc55682168cf0380519aDouglas Gregor if (PLoc.isInvalid()) 851cb7b1e17b63967317ab5cc55682168cf0380519aDouglas Gregor return true; 852cb7b1e17b63967317ab5cc55682168cf0380519aDouglas Gregor 853137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // If there is no include loc (main file) or if the include loc is in a 854137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // different physical file, then we aren't in a "1" line marker flag region. 855137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner SourceLocation IncLoc = PLoc.getIncludeLoc(); 856137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner if (IncLoc.isInvalid() || 857e7b2b6e87dbe5b1207f77b6ff9c210a02f95bb39Chandler Carruth SM.getDecomposedExpansionLoc(IncLoc).first != CurFileID) { 858137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_pop); 859137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner PP.DiscardUntilEndOfDirective(); 860137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner return true; 861137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner } 8621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 863478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 86484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 865478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag,PP)) 866478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 867478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 868478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 869478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // We must have 3 if there are still flags. 870478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (FlagVal != 3) { 871478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_flag); 8725b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner PP.DiscardUntilEndOfDirective(); 873478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 874478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 8751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 876478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsSystemHeader = true; 8771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 878478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 87984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 8809d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag, PP)) 881478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 882478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 883478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // We must have 4 if there is yet another flag. 884478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (FlagVal != 4) { 885478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_flag); 8865b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner PP.DiscardUntilEndOfDirective(); 887478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 888478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 8891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 890478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsExternCHeader = true; 8911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 892478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 89384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 894478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 895478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // There are no more valid flags here. 896478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_flag); 8975b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner PP.DiscardUntilEndOfDirective(); 898478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 899478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner} 900478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 901478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// HandleDigitDirective - Handle a GNU line marker directive, whose syntax is 902478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// one of the following forms: 903478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// 904478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # 42 9051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// # 42 "file" ('1' | '2')? 906478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # 42 "file" ('1' | '2')? '3' '4'? 907478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// 908478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnervoid Preprocessor::HandleDigitDirective(Token &DigitTok) { 909478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Validate the number and convert it to an unsigned. GNU does not have a 910478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // line # limit other than it fit in 32-bits. 911478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned LineNo; 912478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(DigitTok, LineNo, diag::err_pp_linemarker_requires_integer, 913478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner *this)) 914478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return; 9151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 916478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Token StrTok; 917478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Lex(StrTok); 9181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 919478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner bool IsFileEntry = false, IsFileExit = false; 920478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner bool IsSystemHeader = false, IsExternCHeader = false; 9215b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner int FilenameID = -1; 9225b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner 92384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the StrTok is "eod", then it wasn't present. Otherwise, it must be a 92484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // string followed by eod. 92584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (StrTok.is(tok::eod)) 926478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner ; // ok 927478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner else if (StrTok.isNot(tok::string_literal)) { 928478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Diag(StrTok, diag::err_pp_linemarker_invalid_filename); 9295b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 930478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } else { 9315b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner // Parse and validate the string, converting it into a unique ID. 9325b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner StringLiteralParser Literal(&StrTok, 1, *this); 9335cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert(Literal.isAscii() && "Didn't allow wide strings in"); 9345b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.hadError) 9355b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 9365b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.Pascal) { 9375b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner Diag(StrTok, diag::err_pp_linemarker_invalid_filename); 9385b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 9395b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner } 94065aa6885818d4b4eea2e5a9d12085b2398148662Jay Foad FilenameID = SourceMgr.getLineTableFilenameID(Literal.GetString()); 9411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 942478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // If a filename was present, read any flags that are present. 9431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (ReadLineMarkerFlags(IsFileEntry, IsFileExit, 9445b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner IsSystemHeader, IsExternCHeader, *this)) 945478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return; 946478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 9471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9489d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner // Create a line note with this information. 9499d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner SourceMgr.AddLineNote(DigitTok.getLocation(), LineNo, FilenameID, 9501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump IsFileEntry, IsFileExit, 9519d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner IsSystemHeader, IsExternCHeader); 9521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 95316629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner // If the preprocessor has callbacks installed, notify them of the #line 95416629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner // change. This is used so that the line marker comes out in -E mode for 95516629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner // example. 95616629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (Callbacks) { 95716629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner PPCallbacks::FileChangeReason Reason = PPCallbacks::RenameFile; 95816629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (IsFileEntry) 95916629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner Reason = PPCallbacks::EnterFile; 96016629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner else if (IsFileExit) 96116629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner Reason = PPCallbacks::ExitFile; 96216629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner SrcMgr::CharacteristicKind FileKind = SrcMgr::C_User; 96316629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (IsExternCHeader) 96416629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner FileKind = SrcMgr::C_ExternCSystem; 96516629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner else if (IsSystemHeader) 96616629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner FileKind = SrcMgr::C_System; 9671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 96886d0ef74303e9164a0860ce849af597d34f937abChris Lattner Callbacks->FileChanged(CurPPLexer->getSourceLocation(), Reason, FileKind); 96916629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner } 970478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner} 971478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 972478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 973099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner/// HandleUserDiagnosticDirective - Handle a #warning or #error directive. 974099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner/// 9751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::HandleUserDiagnosticDirective(Token &Tok, 976141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isWarning) { 977099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner // PTH doesn't emit #warning or #error directives. 978099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner if (CurPTHLexer) 979359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner return CurPTHLexer->DiscardToEndOfLine(); 980359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner 981141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the line raw. We do this because we don't want macros 982141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // to be expanded and we don't require that the tokens be valid preprocessing 983141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // tokens. For example, this is allowed: "#warning ` 'foo". GCC does 984141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // collapse multiple consequtive white space between tokens, but this isn't 985141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // specified by the standard. 986359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner std::string Message = CurLexer->ReadToEndOfLine(); 987359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner if (isWarning) 988359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(Tok, diag::pp_hash_warning) << Message; 989359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner else 990359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(Tok, diag::err_pp_hash_error) << Message; 991141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 992141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 993141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIdentSCCSDirective - Handle a #ident/#sccs directive. 994141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 995141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIdentSCCSDirective(Token &Tok) { 996141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, this directive is an extension. 997141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::ext_pp_ident_directive); 9981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 999141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the string argument. 1000141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token StrTok; 1001141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Lex(StrTok); 10021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1003141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the token kind isn't a string, it's a malformed directive. 1004141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (StrTok.isNot(tok::string_literal) && 10053692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner StrTok.isNot(tok::wide_string_literal)) { 10063692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(StrTok, diag::err_pp_malformed_ident); 100784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (StrTok.isNot(tok::eod)) 1008099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner DiscardUntilEndOfDirective(); 10093692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 10103692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 10111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 101284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Verify that there is nothing after the string, other than EOD. 101335410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("ident"); 1014141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1015453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (Callbacks) { 1016453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor bool Invalid = false; 1017453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor std::string Str = getSpelling(StrTok, &Invalid); 1018453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (!Invalid) 1019453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor Callbacks->Ident(Tok.getLocation(), Str); 1020453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor } 1021141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1022141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 10237143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor/// \brief Handle a #__export_macro__ directive. 10247143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregorvoid Preprocessor::HandleMacroExportDirective(Token &Tok) { 10257143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor Token MacroNameTok; 10267143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor ReadMacroName(MacroNameTok, 2); 10277143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10287143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // Error reading macro name? If so, diagnostic already issued. 10297143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor if (MacroNameTok.is(tok::eod)) 10307143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor return; 10317143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10327143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // Check to see if this is the last token on the #__export_macro__ line. 10337143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor CheckEndOfDirective("__export_macro__"); 10347143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10357143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // Okay, we finally have a valid identifier to undef. 10367143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor MacroInfo *MI = getMacroInfo(MacroNameTok.getIdentifierInfo()); 10377143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10387143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // If the macro is not defined, this is an error. 10397143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor if (MI == 0) { 1040aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor Diag(MacroNameTok, diag::err_pp_visibility_non_macro) 10417143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor << MacroNameTok.getIdentifierInfo(); 10427143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor return; 10437143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor } 10447143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10457143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // Note that this macro has now been exported. 1046aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor MI->setVisibility(/*IsPublic=*/true, MacroNameTok.getLocation()); 1047aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor 1048aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // If this macro definition came from a PCH file, mark it 1049aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // as having changed since serialization. 1050aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor if (MI->isFromAST()) 1051aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor MI->setChangedAfterLoad(); 1052aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor} 1053aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor 1054aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor/// \brief Handle a #__private_macro__ directive. 1055aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregorvoid Preprocessor::HandleMacroPrivateDirective(Token &Tok) { 1056aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor Token MacroNameTok; 1057aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor ReadMacroName(MacroNameTok, 2); 1058aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor 1059aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // Error reading macro name? If so, diagnostic already issued. 1060aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor if (MacroNameTok.is(tok::eod)) 1061aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor return; 1062aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor 1063aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // Check to see if this is the last token on the #__private_macro__ line. 1064aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor CheckEndOfDirective("__private_macro__"); 1065aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor 1066aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // Okay, we finally have a valid identifier to undef. 1067aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor MacroInfo *MI = getMacroInfo(MacroNameTok.getIdentifierInfo()); 1068aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor 1069aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // If the macro is not defined, this is an error. 1070aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor if (MI == 0) { 1071aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor Diag(MacroNameTok, diag::err_pp_visibility_non_macro) 1072aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor << MacroNameTok.getIdentifierInfo(); 1073aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor return; 1074aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor } 1075aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor 1076aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor // Note that this macro has now been marked private. 1077aa93a875605536d72a10359a0098396192b7d4ecDouglas Gregor MI->setVisibility(/*IsPublic=*/false, MacroNameTok.getLocation()); 10787143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 10797143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // If this macro definition came from a PCH file, mark it 10807143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor // as having changed since serialization. 10817143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor if (MI->isFromAST()) 10827143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor MI->setChangedAfterLoad(); 10837143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor} 10847143aab97c6e849a5a5005b7853b8c7d5af008edDouglas Gregor 1085141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1086141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Include Directive Handling. 1087141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1088141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1089141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// GetIncludeFilenameSpelling - Turn the specified lexer token into a fully 1090141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// checked and spelled filename, e.g. as an operand of #include. This returns 1091141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// true if the input filename was in <>'s or false if it were in ""'s. The 1092141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// caller is expected to provide a buffer that is large enough to hold the 1093141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// spelling of the filename, but is also expected to handle the case when 1094141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// this method decides to use a different buffer. 1095141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerbool Preprocessor::GetIncludeFilenameSpelling(SourceLocation Loc, 10965f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef &Buffer) { 1097141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the text form of the filename. 1098a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner assert(!Buffer.empty() && "Can't have tokens with empty spellings!"); 10991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1100141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Make sure the filename is <x> or "x". 1101141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isAngled; 1102a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer[0] == '<') { 1103a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer.back() != '>') { 1104141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 11055f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1106141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1107141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1108141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner isAngled = true; 1109a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner } else if (Buffer[0] == '"') { 1110a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer.back() != '"') { 1111141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 11125f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1113141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1114141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1115141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner isAngled = false; 1116141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 1117141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 11185f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1119141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1120141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 11211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1122141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Diagnose #include "" as invalid. 1123a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer.size() <= 2) { 1124141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_empty_filename); 11255f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1126a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner return true; 1127141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 11281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1129141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Skip the brackets. 1130a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner Buffer = Buffer.substr(1, Buffer.size()-2); 1131141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return isAngled; 1132141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1133141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1134141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ConcatenateIncludeName - Handle cases where the #include name is expanded 1135141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// from a macro as multiple tokens, which need to be glued together. This 1136141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// occurs for code like: 1137141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #define FOO <a/b.h> 1138141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #include FOO 1139141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// because in this case, "<a/b.h>" is returned as 7 tokens, not one. 1140141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1141141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// This code concatenates and consumes tokens up to the '>' token. It returns 1142141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// false if the > was found, otherwise it returns true if it finds and consumes 114384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// the EOD marker. 1144a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompsonbool Preprocessor::ConcatenateIncludeName( 1145ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor llvm::SmallString<128> &FilenameBuffer, 1146ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor SourceLocation &End) { 1147141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token CurTok; 11481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1149a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Lex(CurTok); 115084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (CurTok.isNot(tok::eod)) { 1151ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor End = CurTok.getLocation(); 1152ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor 115325bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor // FIXME: Provide code completion for #includes. 115425bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor if (CurTok.is(tok::code_completion)) { 11557d100872341f233c81e1d7b72b40457e62c36862Argyrios Kyrtzidis setCodeCompletionReached(); 115625bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor Lex(CurTok); 115725bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor continue; 115825bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor } 115925bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor 1160141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Append the spelling of this token to the buffer. If there was a space 1161141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // before it, add it now. 1162141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.hasLeadingSpace()) 1163141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.push_back(' '); 11641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1165141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the spelling of the token, directly into FilenameBuffer if possible. 1166141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned PreAppendSize = FilenameBuffer.size(); 1167141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.resize(PreAppendSize+CurTok.getLength()); 11681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1169141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const char *BufPtr = &FilenameBuffer[PreAppendSize]; 1170a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson unsigned ActualLen = getSpelling(CurTok, BufPtr); 11711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1172141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the token was spelled somewhere else, copy it into FilenameBuffer. 1173141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (BufPtr != &FilenameBuffer[PreAppendSize]) 1174141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner memcpy(&FilenameBuffer[PreAppendSize], BufPtr, ActualLen); 11751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1176141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Resize FilenameBuffer to the correct size. 1177141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.getLength() != ActualLen) 1178141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.resize(PreAppendSize+ActualLen); 11791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1180141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we found the '>' marker, return success. 1181141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.is(tok::greater)) 1182141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 11831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1184a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Lex(CurTok); 1185141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1186141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 118784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If we hit the eod marker, emit an error and return true so that the caller 118884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // knows the EOD has been read. 1189a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Diag(CurTok.getLocation(), diag::err_pp_expects_filename); 1190141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1191141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1192141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1193141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIncludeDirective - The "#include" tokens have just been read, read the 1194141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// file to be included from the lexer, then include it! This is a common 1195141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// routine with functionality shared between #include, #include_next and 1196721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner/// #import. LookupFrom is set when this is a #include_next directive, it 11971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// specifies the file to start searching from. 1198ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleIncludeDirective(SourceLocation HashLoc, 1199ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &IncludeTok, 1200141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *LookupFrom, 1201141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isImport) { 1202141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1203141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token FilenameTok; 120460e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexIncludeFilename(FilenameTok); 12051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1206141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Reserve a buffer to get the spelling. 1207a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner llvm::SmallString<128> FilenameBuffer; 12085f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Filename; 1209ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor SourceLocation End; 1210ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor 1211141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (FilenameTok.getKind()) { 121284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: 121384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the token kind is EOD, the error has already been diagnosed. 1214141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 12151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1216141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::angle_string_literal: 1217ddeea5644367c9c153c9fee9e51bdea85ce43cbdBenjamin Kramer case tok::string_literal: 1218ddeea5644367c9c153c9fee9e51bdea85ce43cbdBenjamin Kramer Filename = getSpelling(FilenameTok, FilenameBuffer); 1219ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor End = FilenameTok.getLocation(); 1220141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 12211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1222141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::less: 1223141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // This could be a <foo/bar.h> file coming from a macro expansion. In this 1224141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // case, glue the tokens together into FilenameBuffer and interpret those. 1225141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.push_back('<'); 1226ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor if (ConcatenateIncludeName(FilenameBuffer, End)) 122784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne return; // Found <eod> but no ">"? Diagnostic already emitted. 1228a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner Filename = FilenameBuffer.str(); 1229141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 1230141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 1231141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename); 1232141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 1233141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1234141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 12351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1236193575455e00eca03fd7177f60e3f2e6263cb661Kovarththanan Rajaratnam bool isAngled = 1237a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner GetIncludeFilenameSpelling(FilenameTok.getLocation(), Filename); 1238141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If GetIncludeFilenameSpelling set the start ptr to null, there was an 1239141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // error. 1240a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Filename.empty()) { 1241141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 1242141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1243141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 12441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 124584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Verify that there is nothing after the filename, other than EOD. Note that 12469cb51ce03caf0755759f7e67aea7d4be684ff738Chris Lattner // we allow macros that expand to nothing after the filename, because this 12479cb51ce03caf0755759f7e67aea7d4be684ff738Chris Lattner // falls into the category of "#include pp-tokens new-line" specified in 12489cb51ce03caf0755759f7e67aea7d4be684ff738Chris Lattner // C99 6.10.2p4. 1249e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar CheckEndOfDirective(IncludeTok.getIdentifierInfo()->getNameStart(), true); 1250141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1251141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check that we don't have infinite #include recursion. 12523692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (IncludeMacroStack.size() == MaxAllowedIncludeStackDepth-1) { 12533692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(FilenameTok, diag::err_pp_include_too_deep); 12543692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 12553692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 12561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12578dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall // Complain about attempts to #include files in an audit pragma. 12588dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall if (PragmaARCCFCodeAuditedLoc.isValid()) { 12598dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall Diag(HashLoc, diag::err_pp_include_in_arc_cf_code_audited); 12608dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall Diag(PragmaARCCFCodeAuditedLoc, diag::note_pragma_entered_here); 12618dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall 12628dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall // Immediately leave the pragma. 12638dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall PragmaARCCFCodeAuditedLoc = SourceLocation(); 12648dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall } 12658dfac0baaf0f81d3945bcb306480e358ba8d1f08John McCall 1266141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Search include directories. 1267141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *CurDir; 12687412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek llvm::SmallString<1024> SearchPath; 12697412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek llvm::SmallString<1024> RelativePath; 1270b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth // We get the raw path only if we have 'Callbacks' to which we later pass 1271b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth // the path. 1272c69c42e939e6bdaa56d162cc36da4f6b6c53e8dbDouglas Gregor ModuleMap::Module *SuggestedModule = 0; 1273b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const FileEntry *File = LookupFile( 12747412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek Filename, isAngled, LookupFrom, CurDir, 1275fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor Callbacks ? &SearchPath : NULL, Callbacks ? &RelativePath : NULL, 1276fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor AutoModuleImport? &SuggestedModule : 0); 1277fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor 1278fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor // If we are supposed to import a module rather than including the header, 1279fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor // do so now. 1280c69c42e939e6bdaa56d162cc36da4f6b6c53e8dbDouglas Gregor if (SuggestedModule) { 1281c69c42e939e6bdaa56d162cc36da4f6b6c53e8dbDouglas Gregor // FIXME: Actually load the submodule that we were given. 1282c69c42e939e6bdaa56d162cc36da4f6b6c53e8dbDouglas Gregor while (SuggestedModule->Parent) 1283c69c42e939e6bdaa56d162cc36da4f6b6c53e8dbDouglas Gregor SuggestedModule = SuggestedModule->Parent; 1284c69c42e939e6bdaa56d162cc36da4f6b6c53e8dbDouglas Gregor 1285fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor TheModuleLoader.loadModule(IncludeTok.getLocation(), 1286c69c42e939e6bdaa56d162cc36da4f6b6c53e8dbDouglas Gregor Identifiers.get(SuggestedModule->Name), 1287fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor FilenameTok.getLocation()); 1288fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor return; 1289fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor } 1290fba18aa8f2cd1994dc65e8cb9f4be201c560dc0bDouglas Gregor 1291ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor // Notify the callback object that we've seen an inclusion directive. 1292ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor if (Callbacks) 1293b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth Callbacks->InclusionDirective(HashLoc, IncludeTok, Filename, isAngled, File, 12947412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek End, SearchPath, RelativePath); 1295b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth 1296bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne if (File == 0) { 1297f84139a1331c63c998e8b7d54148c75ac0b48ccdEli Friedman if (!SuppressIncludeNotFoundError) 1298f84139a1331c63c998e8b7d54148c75ac0b48ccdEli Friedman Diag(FilenameTok, diag::err_pp_file_not_found) << Filename; 1299bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne return; 1300bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne } 1301bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne 1302721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner // The #included file will be considered to be a system header if either it is 1303721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner // in a system include directory, or if the #includer is a system include 1304721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner // header. 13051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SrcMgr::CharacteristicKind FileCharacter = 13060b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner std::max(HeaderInfo.getFileDirFlavor(File), 1307693faa6e6918994bc22aacf078a889bb93e0fe25Chris Lattner SourceMgr.getFileCharacteristic(FilenameTok.getLocation())); 13081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13096fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner // Ask HeaderInfo if we should enter this #include file. If not, #including 13106fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner // this file will have no effect. 13116fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner if (!HeaderInfo.ShouldEnterIncludeFile(File, isImport)) { 1312e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner if (Callbacks) 13136fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner Callbacks->FileSkipped(*File, FilenameTok, FileCharacter); 13146fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner return; 13156fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner } 13166fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner 1317141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Look up the file, create a File ID for it. 13182b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = SourceMgr.createFileID(File, FilenameTok.getLocation(), 13192b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileCharacter); 1320d57b7ff9bebc4c45f325fc1be6f238cfcd4c3732Peter Collingbourne assert(!FID.isInvalid() && "Expected valid file ID"); 1321141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1322141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if all is good, enter the new file! 1323e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner EnterSourceFile(FID, CurDir, FilenameTok.getLocation()); 1324141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1325141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1326141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIncludeNextDirective - Implements #include_next. 1327141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1328ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleIncludeNextDirective(SourceLocation HashLoc, 1329ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &IncludeNextTok) { 1330141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::ext_pp_include_next_directive); 13311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1332141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #include_next is like #include, except that we start searching after 1333141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the current found directory. If we can't do this, issue a 1334141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // diagnostic. 1335141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *Lookup = CurDirLookup; 1336141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (isInPrimaryFile()) { 1337141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Lookup = 0; 1338141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::pp_include_next_in_primary); 1339141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (Lookup == 0) { 1340141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::pp_include_next_absolute_path); 1341141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 1342141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Start looking up in the next directory. 1343141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++Lookup; 1344141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 13451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1346ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeDirective(HashLoc, IncludeNextTok, Lookup); 1347141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1348141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1349141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleImportDirective - Implements #import. 1350141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1351ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleImportDirective(SourceLocation HashLoc, 1352ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &ImportTok) { 1353b627c8d683c4d3facd774c432b1fdc2d35819369Chris Lattner if (!Features.ObjC1) // #import is standard for ObjC. 1354b627c8d683c4d3facd774c432b1fdc2d35819369Chris Lattner Diag(ImportTok, diag::ext_pp_import_directive); 13551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1356ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeDirective(HashLoc, ImportTok, 0, true); 1357141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1358141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1359de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// HandleIncludeMacrosDirective - The -imacros command line option turns into a 1360de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// pseudo directive in the predefines buffer. This handles it by sucking all 1361de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// tokens through the preprocessor and discarding them (only keeping the side 1362de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// effects on the preprocessor). 1363ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleIncludeMacrosDirective(SourceLocation HashLoc, 1364ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &IncludeMacrosTok) { 1365de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner // This directive should only occur in the predefines buffer. If not, emit an 1366de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner // error and reject it. 1367de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner SourceLocation Loc = IncludeMacrosTok.getLocation(); 1368de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner if (strcmp(SourceMgr.getBufferName(Loc), "<built-in>") != 0) { 1369de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner Diag(IncludeMacrosTok.getLocation(), 1370de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner diag::pp_include_macros_out_of_predefines); 1371de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner DiscardUntilEndOfDirective(); 1372de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner return; 1373de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner } 13741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1375fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner // Treat this as a normal #include for checking purposes. If this is 1376fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner // successful, it will push a new lexer onto the include stack. 1377ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor HandleIncludeDirective(HashLoc, IncludeMacrosTok, 0, false); 13781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1379fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner Token TmpTok; 1380fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner do { 1381fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner Lex(TmpTok); 1382fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner assert(TmpTok.isNot(tok::eof) && "Didn't find end of -imacros!"); 1383fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner } while (TmpTok.isNot(tok::hashhash)); 1384de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner} 1385de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner 1386141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1387141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Macro Directive Handling. 1388141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1389141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1390141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ReadMacroDefinitionArgList - The ( starting an argument list of a macro 1391141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// definition has just been read. Lex the rest of the arguments and the 1392141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// closing ), updating MI with what we learn. Return true if an error occurs 1393141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// parsing the arg list. 1394141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerbool Preprocessor::ReadMacroDefinitionArgList(MacroInfo *MI) { 13955f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<IdentifierInfo*, 32> Arguments; 13961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1397141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 1398141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (1) { 1399141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1400141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Tok.getKind()) { 1401141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::r_paren: 1402141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Found the end of the argument list. 1403cf29e0716bb3ecbbc15b74cd648367d6b075fdf0Chris Lattner if (Arguments.empty()) // #define FOO() 1404141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 1405141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Otherwise we have #define FOO(A,) 1406141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_expected_ident_in_arg_list); 1407141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1408141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::ellipsis: // #define X(... -> C99 varargs 1409661a99690bc133bbaa029da925481d4a860dec90Richard Smith if (!Features.C99) 1410661a99690bc133bbaa029da925481d4a860dec90Richard Smith Diag(Tok, Features.CPlusPlus0x ? 1411661a99690bc133bbaa029da925481d4a860dec90Richard Smith diag::warn_cxx98_compat_variadic_macro : 1412661a99690bc133bbaa029da925481d4a860dec90Richard Smith diag::ext_variadic_macro); 1413141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1414141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 1415141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1416141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::r_paren)) { 1417141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 1418141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1419141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1420141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Add the __VA_ARGS__ identifier as an argument. 1421141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.push_back(Ident__VA_ARGS__); 1422141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsC99Varargs(); 1423685befeb5f6472585bae473a6389e47cab9eac67Chris Lattner MI->setArgumentList(&Arguments[0], Arguments.size(), BP); 1424141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 142584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: // #define X( 1426141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 1427141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1428141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 1429141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Handle keywords and identifiers here to accept things like 1430141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define Foo(for) for. 1431141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = Tok.getIdentifierInfo(); 1432141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) { 1433141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define X(1 1434141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_invalid_tok_in_arg_list); 1435141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1436141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1437141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1438141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is already used as an argument, it is used multiple times (e.g. 1439141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define X(A,A. 14401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (std::find(Arguments.begin(), Arguments.end(), II) != 1441141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.end()) { // C99 6.10.3p6 14426cf3ed7be70a7a9c269a65e3316884f41c7373d4Chris Lattner Diag(Tok, diag::err_pp_duplicate_name_in_arg_list) << II; 1443141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1444141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 14451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1446141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Add the argument to the macro info. 1447141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.push_back(II); 14481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1449141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 1450141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 14511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1452141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Tok.getKind()) { 1453141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: // #define X(A B 1454141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_expected_comma_in_arg_list); 1455141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1456141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::r_paren: // #define X(A) 1457685befeb5f6472585bae473a6389e47cab9eac67Chris Lattner MI->setArgumentList(&Arguments[0], Arguments.size(), BP); 1458141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 1459141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::comma: // #define X(A, 1460141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 1461141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::ellipsis: // #define X(A... -> GCC extension 1462141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Diagnose extension. 1463141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::ext_named_variadic_macro); 14641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1465141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 1466141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1467141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::r_paren)) { 1468141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 1469141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1470141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 14711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1472141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsGNUVarargs(); 1473685befeb5f6472585bae473a6389e47cab9eac67Chris Lattner MI->setArgumentList(&Arguments[0], Arguments.size(), BP); 1474141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 1475141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1476141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1477141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1478141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1479141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1480141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleDefineDirective - Implements #define. This consumes the entire macro 1481141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// line then lets the caller lex the next real token. 1482141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleDefineDirective(Token &DefineTok) { 1483141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumDefined; 1484141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1485141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 1486141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok, 1); 14871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1488141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 148984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) 1490141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1491141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 14922451b528fe114595d0f10ef2c05047928558ab0fChris Lattner Token LastTok = MacroNameTok; 14932451b528fe114595d0f10ef2c05047928558ab0fChris Lattner 1494141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we are supposed to keep comments in #defines, reenable comment saving 1495141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // mode. 1496ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepMacroComments); 14971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1498141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Create the new macro. 14990ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek MacroInfo *MI = AllocateMacroInfo(MacroNameTok.getLocation()); 15001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1501141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 1502141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 15031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1504141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a function-like macro definition, parse the argument list, 1505141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // marking each of the identifiers as being used as macro arguments. Also, 1506141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // check other constraints on the first token of the macro body. 150784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.is(tok::eod)) { 1508141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If there is no body to this macro, we have no special handling here. 15096272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } else if (Tok.hasLeadingSpace()) { 15106272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // This is a normal token with leading space. Clear the leading space 15116272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // marker on the first token to get proper expansion. 15126272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Tok.clearFlag(Token::LeadingSpace); 15136272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } else if (Tok.is(tok::l_paren)) { 1514141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // This is a function-like macro definition. Read the argument list. 1515141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsFunctionLike(); 1516141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ReadMacroDefinitionArgList(MI)) { 1517141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Forget about MI. 15180ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1519141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Throw away the rest of the line. 152060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->ParsingPreprocessorDirective) 1521141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 1522141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1523141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1524141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 15258fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // If this is a definition of a variadic C99 function-like macro, not using 15268fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // the GNU named varargs extension, enabled __VA_ARGS__. 15271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15288fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // "Poison" __VA_ARGS__, which can only appear in the expansion of a macro. 15298fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // This gets unpoisoned where it is allowed. 15308fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner assert(Ident__VA_ARGS__->isPoisoned() && "__VA_ARGS__ should be poisoned!"); 15318fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner if (MI->isC99Varargs()) 15328fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner Ident__VA_ARGS__->setIsPoisoned(false); 15331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1534141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the first token after the arg list for down below. 1535141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1536158ebfba7545b3a9947f87bed83ea710df95ac3dEli Friedman } else if (Features.C99 || Features.CPlusPlus0x) { 1537141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 requires whitespace between the macro definition and the body. Emit 1538141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // a diagnostic for something like "#define X+". 15396272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Diag(Tok, diag::ext_c99_whitespace_required_after_macro_name); 1540141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 15416272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // C90 6.8 TC1 says: "In the definition of an object-like macro, if the 15426272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // first character of a replacement list is not a character required by 15436272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // subclause 5.2.1, then there shall be white-space separation between the 15446272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // identifier and the replacement list.". 5.2.1 lists this set: 15456272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // "A-Za-z0-9!"#%&'()*+,_./:;<=>?[\]^_{|}~" as well as whitespace, which 15466272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // is irrelevant here. 15476272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner bool isInvalid = false; 15486272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner if (Tok.is(tok::at)) // @ is not in the list above. 15496272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner isInvalid = true; 15506272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner else if (Tok.is(tok::unknown)) { 15516272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // If we have an unknown token, it is something strange like "`". Since 15526272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // all of valid characters would have lexed into a single character 15536272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // token of some sort, we know this is not a valid case. 15546272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner isInvalid = true; 15556272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } 15566272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner if (isInvalid) 15576272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Diag(Tok, diag::ext_missing_whitespace_after_macro_name); 15586272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner else 15596272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Diag(Tok, diag::warn_missing_whitespace_after_macro_name); 1560141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15612451b528fe114595d0f10ef2c05047928558ab0fChris Lattner 156284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (!Tok.is(tok::eod)) 15632451b528fe114595d0f10ef2c05047928558ab0fChris Lattner LastTok = Tok; 15642451b528fe114595d0f10ef2c05047928558ab0fChris Lattner 1565141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the macro body. 1566141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->isObjectLike()) { 1567141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Object-like macros are very simple, just read their body. 156884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (Tok.isNot(tok::eod)) { 15692451b528fe114595d0f10ef2c05047928558ab0fChris Lattner LastTok = Tok; 1570141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->AddTokenToBody(Tok); 1571141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1572141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1573141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1575141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 15763240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Otherwise, read the body of a function-like macro. While we are at it, 15773240469102eca90fa5123ec9636fa0364df3034cChris Lattner // check C99 6.10.3.2p1: ensure that # operators are followed by macro 15783240469102eca90fa5123ec9636fa0364df3034cChris Lattner // parameters in function-like macro expansions. 157984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (Tok.isNot(tok::eod)) { 15802451b528fe114595d0f10ef2c05047928558ab0fChris Lattner LastTok = Tok; 1581141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1582141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::hash)) { 15833240469102eca90fa5123ec9636fa0364df3034cChris Lattner MI->AddTokenToBody(Tok); 15841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1585141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1586141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1587141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 1588141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1590141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1591141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 15921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15933240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Check for a valid macro arg identifier. 15943240469102eca90fa5123ec9636fa0364df3034cChris Lattner if (Tok.getIdentifierInfo() == 0 || 15953240469102eca90fa5123ec9636fa0364df3034cChris Lattner MI->getArgumentNum(Tok.getIdentifierInfo()) == -1) { 15963240469102eca90fa5123ec9636fa0364df3034cChris Lattner 15973240469102eca90fa5123ec9636fa0364df3034cChris Lattner // If this is assembler-with-cpp mode, we accept random gibberish after 15983240469102eca90fa5123ec9636fa0364df3034cChris Lattner // the '#' because '#' is often a comment character. However, change 15993240469102eca90fa5123ec9636fa0364df3034cChris Lattner // the kind of the token to tok::unknown so that the preprocessor isn't 16003240469102eca90fa5123ec9636fa0364df3034cChris Lattner // confused. 160184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (getLangOptions().AsmPreprocessor && Tok.isNot(tok::eod)) { 16023240469102eca90fa5123ec9636fa0364df3034cChris Lattner LastTok.setKind(tok::unknown); 16033240469102eca90fa5123ec9636fa0364df3034cChris Lattner } else { 16043240469102eca90fa5123ec9636fa0364df3034cChris Lattner Diag(Tok, diag::err_pp_stringize_not_parameter); 16053240469102eca90fa5123ec9636fa0364df3034cChris Lattner ReleaseMacroInfo(MI); 16061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16073240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Disable __VA_ARGS__ again. 16083240469102eca90fa5123ec9636fa0364df3034cChris Lattner Ident__VA_ARGS__->setIsPoisoned(true); 16093240469102eca90fa5123ec9636fa0364df3034cChris Lattner return; 16103240469102eca90fa5123ec9636fa0364df3034cChris Lattner } 1611141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 16121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16133240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Things look ok, add the '#' and param name tokens to the macro. 16143240469102eca90fa5123ec9636fa0364df3034cChris Lattner MI->AddTokenToBody(LastTok); 1615141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->AddTokenToBody(Tok); 16163240469102eca90fa5123ec9636fa0364df3034cChris Lattner LastTok = Tok; 16171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1618141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1619141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1620141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1621141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 16221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1624141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Disable __VA_ARGS__ again. 1625141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Ident__VA_ARGS__->setIsPoisoned(true); 1626141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1627fc8f0e14ad142ed811e90fbd9a30e419e301c717Chris Lattner // Check that there is no paste (##) operator at the beginning or end of the 1628141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // replacement list. 1629141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned NumTokens = MI->getNumTokens(); 1630141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (NumTokens != 0) { 1631141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->getReplacementToken(0).is(tok::hashhash)) { 1632141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getReplacementToken(0), diag::err_paste_at_start); 16330ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1634141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1635141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1636141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->getReplacementToken(NumTokens-1).is(tok::hashhash)) { 1637141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getReplacementToken(NumTokens-1), diag::err_paste_at_end); 16380ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1639141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1640141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1641141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 16421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16432451b528fe114595d0f10ef2c05047928558ab0fChris Lattner MI->setDefinitionEndLoc(LastTok.getLocation()); 16441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1645141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if this identifier already had a macro defined for it, verify that 1646141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the macro bodies are identical and free the old definition. 1647141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MacroInfo *OtherMI = getMacroInfo(MacroNameTok.getIdentifierInfo())) { 164841c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // It is very common for system headers to have tons of macro redefinitions 164941c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // and for warnings to be disabled in system headers. If this is the case, 165041c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // then don't bother calling MacroInfo::isIdenticalTo. 16517f549dfd7b1d3b2b09e5878eeb754efae253d557Chris Lattner if (!getDiagnostics().getSuppressSystemWarnings() || 165241c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner !SourceMgr.isInSystemHeader(DefineTok.getLocation())) { 1653a33e0504f61132ac43f4f89af43b12c87e987c20Argyrios Kyrtzidis if (!OtherMI->isUsed() && OtherMI->isWarnIfUnused()) 165441c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner Diag(OtherMI->getDefinitionLoc(), diag::pp_macro_not_used); 1655141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1656f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Macros must be identical. This means all tokens and whitespace 165741c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // separation must be the same. C99 6.10.3.2. 1658f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (!OtherMI->isAllowRedefinitionsWithoutWarning() && 1659a7e6845660f91ec611427e1db842780e1ec12bdbEli Friedman !MI->isIdenticalTo(*OtherMI, *this)) { 166041c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner Diag(MI->getDefinitionLoc(), diag::ext_pp_macro_redef) 166141c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner << MacroNameTok.getIdentifierInfo(); 166241c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner Diag(OtherMI->getDefinitionLoc(), diag::note_previous_definition); 166341c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner } 1664141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1665a33e0504f61132ac43f4f89af43b12c87e987c20Argyrios Kyrtzidis if (OtherMI->isWarnIfUnused()) 1666a33e0504f61132ac43f4f89af43b12c87e987c20Argyrios Kyrtzidis WarnUnusedMacroLocs.erase(OtherMI->getDefinitionLoc()); 16670ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(OtherMI); 1668141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 16691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1670141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner setMacroInfo(MacroNameTok.getIdentifierInfo(), MI); 16711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16720827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis assert(!MI->isUsed()); 16730827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // If we need warning for not using the macro, add its location in the 16740827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // warn-because-unused-macro set. If it gets used it will be removed from set. 16750827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis if (isInPrimaryFile() && // don't warn for include'd macros. 16760827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis Diags->getDiagnosticLevel(diag::pp_macro_not_used, 1677d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie MI->getDefinitionLoc()) != DiagnosticsEngine::Ignored) { 16780827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis MI->setIsWarnIfUnused(true); 16790827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis WarnUnusedMacroLocs.insert(MI->getDefinitionLoc()); 16800827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis } 16810827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis 1682f4a72b07747cd6ae1a9f6974e148ae504c879349Chris Lattner // If the callbacks want to know, tell them about the macro definition. 1683f4a72b07747cd6ae1a9f6974e148ae504c879349Chris Lattner if (Callbacks) 16842aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->MacroDefined(MacroNameTok, MI); 1685141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1686141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1687141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleUndefDirective - Implements #undef. 1688141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1689141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleUndefDirective(Token &UndefTok) { 1690141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumUndefined; 1691141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1692141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 1693141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok, 2); 16941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1695141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 169684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) 1697141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 16981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1699141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check to see if this is the last token on the #undef line. 170035410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("undef"); 17011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1702141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we finally have a valid identifier to undef. 1703141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MacroInfo *MI = getMacroInfo(MacroNameTok.getIdentifierInfo()); 17041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1705141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the macro is not defined, this is a noop undef, just return. 1706141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI == 0) return; 1707141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 17081f8dcfca6c57606b9f4f96404642c02562289b83Argyrios Kyrtzidis if (!MI->isUsed() && MI->isWarnIfUnused()) 1709141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getDefinitionLoc(), diag::pp_macro_not_used); 171041c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner 171141c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner // If the callbacks want to know, tell them about the macro #undef. 171241c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner if (Callbacks) 17132aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->MacroUndefined(MacroNameTok, MI); 171441c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner 17150827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis if (MI->isWarnIfUnused()) 17160827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis WarnUnusedMacroLocs.erase(MI->getDefinitionLoc()); 17170827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis 1718141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Free macro definition. 17190ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1720141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner setMacroInfo(MacroNameTok.getIdentifierInfo(), 0); 1721141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1722141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1723141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1724141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1725141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Conditional Directive Handling. 1726141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1727141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1728141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIfdefDirective - Implements the #ifdef/#ifndef directive. isIfndef is 1729141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// true when this is a #ifndef directive. ReadAnyTokensBeforeDirective is true 1730141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// if any tokens have been returned or pp-directives activated before this 1731141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #ifndef has been lexed. 1732141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1733141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIfdefDirective(Token &Result, bool isIfndef, 1734141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ReadAnyTokensBeforeDirective) { 1735141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumIf; 1736141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token DirectiveTok = Result; 1737141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1738141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 1739141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok); 17401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1741141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 174284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) { 1743141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Skip code until we get to #endif. This helps with recovery by not 1744141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // emitting an error when the #endif is reached. 1745141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner SkipExcludedConditionalBlock(DirectiveTok.getLocation(), 1746141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*Foundnonskip*/false, /*FoundElse*/false); 1747141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1748141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 17491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1750141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check to see if this is the last token on the #if[n]def line. 175135410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective(isIfndef ? "ifndef" : "ifdef"); 1752141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 175313d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner IdentifierInfo *MII = MacroNameTok.getIdentifierInfo(); 175413d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner MacroInfo *MI = getMacroInfo(MII); 1755193575455e00eca03fd7177f60e3f2e6263cb661Kovarththanan Rajaratnam 175660e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) { 175713d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // If the start of a top-level #ifdef and if the macro is not defined, 175813d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // inform MIOpt that this might be the start of a proper include guard. 175913d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // Otherwise it is some other form of unknown conditional which we can't 176013d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // handle. 176113d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner if (!ReadAnyTokensBeforeDirective && MI == 0) { 1762141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(isIfndef && "#ifdef shouldn't reach here"); 176313d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner CurPPLexer->MIOpt.EnterTopLevelIFNDEF(MII); 1764141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else 176560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 1766141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1767141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1768141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If there is a macro, process it. 1769141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI) // Mark it used. 17700827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis markMacroAsUsed(MI); 17711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1772141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Should we include the stuff contained by this directive? 1773141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!MI == isIfndef) { 1774141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, remember that we are inside a conditional, then lex the next token. 17751d9c54df56391ac4740db27d551782e81189cb51Chris Lattner CurPPLexer->pushConditionalLevel(DirectiveTok.getLocation(), 17761d9c54df56391ac4740db27d551782e81189cb51Chris Lattner /*wasskip*/false, /*foundnonskip*/true, 17771d9c54df56391ac4740db27d551782e81189cb51Chris Lattner /*foundelse*/false); 1778141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 177908985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // No, skip the contents of this block. 1780141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner SkipExcludedConditionalBlock(DirectiveTok.getLocation(), 17811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump /*Foundnonskip*/false, 1782141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*FoundElse*/false); 1783141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 178408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 178508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) { 178608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (isIfndef) 17872aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->Ifndef(MacroNameTok); 178808985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein else 17892aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->Ifdef(MacroNameTok); 179008985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein } 1791141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1792141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1793141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIfDirective - Implements the #if directive. 1794141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1795141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIfDirective(Token &IfToken, 1796141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ReadAnyTokensBeforeDirective) { 1797141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumIf; 17981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 179908985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // Parse and evaluate the conditional expression. 1800141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *IfNDefMacro = 0; 180108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalBegin = CurPPLexer->getSourceLocation(); 180208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const bool ConditionalTrue = EvaluateDirectiveExpression(IfNDefMacro); 180308985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalEnd = CurPPLexer->getSourceLocation(); 18040049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes 18050049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes // If this condition is equivalent to #ifndef X, and if this is the first 18060049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes // directive seen, handle it for the multiple-include optimization. 180760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) { 180813d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner if (!ReadAnyTokensBeforeDirective && IfNDefMacro && ConditionalTrue) 180960e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelIFNDEF(IfNDefMacro); 18100049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes else 181160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 18120049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes } 18130049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes 1814141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Should we include the stuff contained by this directive? 1815141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ConditionalTrue) { 1816141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, remember that we are inside a conditional, then lex the next token. 181760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->pushConditionalLevel(IfToken.getLocation(), /*wasskip*/false, 1818141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*foundnonskip*/true, /*foundelse*/false); 1819141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 182008985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // No, skip the contents of this block. 18211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SkipExcludedConditionalBlock(IfToken.getLocation(), /*Foundnonskip*/false, 1822141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*FoundElse*/false); 1823141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 182408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 182508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 182608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->If(SourceRange(ConditionalBegin, ConditionalEnd)); 1827141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1828141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1829141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleEndifDirective - Implements the #endif directive. 1830141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1831141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleEndifDirective(Token &EndifToken) { 1832141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumEndif; 18331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1834141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check that this is the whole directive. 183535410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("endif"); 18361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1837141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CondInfo; 183860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->popConditionalLevel(CondInfo)) { 1839141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // No conditionals on the stack: this is an #endif without an #if. 18403692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(EndifToken, diag::err_pp_endif_without_if); 18413692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1842141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 18431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1844141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this the end of a top-level #endif, inform MIOpt. 184560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) 184660e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.ExitTopLevelConditional(); 18471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 184860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek assert(!CondInfo.WasSkipping && !CurPPLexer->LexingRawMode && 1849141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner "This code should only be reachable in the non-skipping case!"); 1850141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 185108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 185208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->Endif(); 185308985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein} 1854141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 185508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// HandleElseDirective - Implements the #else directive. 185608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// 1857141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleElseDirective(Token &Result) { 1858141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumElse; 18591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1860141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #else directive in a non-skipping conditional... start skipping. 186135410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("else"); 18621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1863141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CI; 18643692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (CurPPLexer->popConditionalLevel(CI)) { 18653692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(Result, diag::pp_err_else_without_if); 18663692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 18673692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 18681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1869141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a top-level #else, inform the MIOpt. 187060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) 187160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 1872141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1873141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #else with a #else before it, report the error. 1874141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CI.FoundElse) Diag(Result, diag::pp_err_else_after_else); 18751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 187608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // Finally, skip the rest of the contents of this block. 187708985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein SkipExcludedConditionalBlock(CI.IfLoc, /*Foundnonskip*/true, 18786b4ff04dd22e7159887ea6c1bb8b1c01fc9c70a9Argyrios Kyrtzidis /*FoundElse*/true, Result.getLocation()); 187908985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 188008985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 188108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->Else(); 1882141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1883141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 188408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// HandleElifDirective - Implements the #elif directive. 188508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// 1886141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleElifDirective(Token &ElifToken) { 1887141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumElse; 18881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1889141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #elif directive in a non-skipping conditional... start skipping. 1890141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We don't care what the condition is, because we will always skip it (since 1891141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the block immediately before it was included). 189208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalBegin = CurPPLexer->getSourceLocation(); 1893141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 189408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalEnd = CurPPLexer->getSourceLocation(); 1895141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1896141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CI; 18973692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (CurPPLexer->popConditionalLevel(CI)) { 18983692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(ElifToken, diag::pp_err_elif_without_if); 18993692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 19003692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 19011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1902141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a top-level #elif, inform the MIOpt. 190360e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) 190460e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 19051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1906141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #elif with a #else before it, report the error. 1907141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CI.FoundElse) Diag(ElifToken, diag::pp_err_elif_after_else); 1908141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 190908985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // Finally, skip the rest of the contents of this block. 191008985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein SkipExcludedConditionalBlock(CI.IfLoc, /*Foundnonskip*/true, 19116b4ff04dd22e7159887ea6c1bb8b1c01fc9c70a9Argyrios Kyrtzidis /*FoundElse*/CI.FoundElse, 19126b4ff04dd22e7159887ea6c1bb8b1c01fc9c70a9Argyrios Kyrtzidis ElifToken.getLocation()); 191308985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 191408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 191508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->Elif(SourceRange(ConditionalBegin, ConditionalEnd)); 1916141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1917