PPDirectives.cpp revision 70c7b10c64beed3e08da004c10ed5170c00df8f9
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" 2080c60f72848896f867f6b7e664e7060d9e78f019Douglas Gregor#include "clang/Lex/Pragma.h" 216e2901407bff59aeb4cc301cc58b034723d0eb49Chris Lattner#include "clang/Basic/FileManager.h" 22141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner#include "clang/Basic/SourceManager.h" 23359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner#include "llvm/ADT/APInt.h" 24141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerusing namespace clang; 25141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 26141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 27141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Utility Methods for Preprocessor Directive Handling. 28141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 29141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 30f47724bf78299c7a50f008e0443c5f9f9f279ddcChris LattnerMacroInfo *Preprocessor::AllocateMacroInfo() { 319714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MacroInfoChain *MIChain; 321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 339714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek if (MICache) { 349714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChain = MICache; 359714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MICache = MICache->Next; 36af8fa25c0d4e0540952a50bbd06dc1558954ccd9Ted Kremenek } 379714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek else { 389714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChain = BP.Allocate<MacroInfoChain>(); 399714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek } 409714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek 419714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChain->Next = MIChainHead; 429714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChain->Prev = 0; 439714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek if (MIChainHead) 449714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChainHead->Prev = MIChain; 459714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChainHead = MIChain; 469714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek 479714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek return &(MIChain->MI); 48f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner} 49f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 50f47724bf78299c7a50f008e0443c5f9f9f279ddcChris LattnerMacroInfo *Preprocessor::AllocateMacroInfo(SourceLocation L) { 51f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroInfo *MI = AllocateMacroInfo(); 520ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek new (MI) MacroInfo(L); 530ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek return MI; 540ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek} 550ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek 56f47724bf78299c7a50f008e0443c5f9f9f279ddcChris LattnerMacroInfo *Preprocessor::CloneMacroInfo(const MacroInfo &MacroToClone) { 57f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner MacroInfo *MI = AllocateMacroInfo(); 58f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner new (MI) MacroInfo(MacroToClone, BP); 59f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner return MI; 60f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner} 61f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner 620301b3ff132a4d986c092d161cb77d74b04cd2a6Chris Lattner/// ReleaseMacroInfo - Release the specified MacroInfo. This memory will 630301b3ff132a4d986c092d161cb77d74b04cd2a6Chris Lattner/// be reused for allocating new MacroInfo objects. 642c1ab9079cb117dc0470ab423fe0bc5177546339Chris Lattnervoid Preprocessor::ReleaseMacroInfo(MacroInfo *MI) { 659714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MacroInfoChain *MIChain = (MacroInfoChain*) MI; 669714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek if (MacroInfoChain *Prev = MIChain->Prev) { 679714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MacroInfoChain *Next = MIChain->Next; 689714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek Prev->Next = Next; 699714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek if (Next) 709714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek Next->Prev = Prev; 719714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek } 729714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek else { 739714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek assert(MIChainHead == MIChain); 749714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChainHead = MIChain->Next; 759714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChainHead->Prev = 0; 769714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek } 779714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MIChain->Next = MICache; 789714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MICache = MIChain; 790301b3ff132a4d986c092d161cb77d74b04cd2a6Chris Lattner 809714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek MI->Destroy(); 819714a2385cb66b6efa373fc668641de602dd9adbTed Kremenek} 820301b3ff132a4d986c092d161cb77d74b04cd2a6Chris Lattner 83141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// DiscardUntilEndOfDirective - Read and discard all tokens remaining on the 8484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// current line until the tok::eod token is found. 85141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::DiscardUntilEndOfDirective() { 86141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tmp; 87141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner do { 88141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tmp); 89a5ef584fd3d18da0c98342b4b6453948b7eb30d3Peter Collingbourne assert(Tmp.isNot(tok::eof) && "EOF seen while discarding directive tokens"); 9084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne } while (Tmp.isNot(tok::eod)); 91141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 92141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 93141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ReadMacroName - Lex and validate a macro name, which occurs after a 9484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// #define or #undef. This sets the token kind to eod and discards the rest 95141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// of the macro line if the macro name is invalid. isDefineUndef is 1 if 96141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// this is due to a a #define, 2 if #undef directive, 0 if it is something 97141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// else (e.g. #ifdef). 98141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::ReadMacroName(Token &MacroNameTok, char isDefineUndef) { 99141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the token, don't allow macro expansion on it. 100141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(MacroNameTok); 1011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1021fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor if (MacroNameTok.is(tok::code_completion)) { 1031fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor if (CodeComplete) 1041fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor CodeComplete->CodeCompleteMacroName(isDefineUndef == 1); 1051fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor LexUnexpandedToken(MacroNameTok); 1061fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor return; 1071fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor } 1081fbb447e9d43c2c676e94081fbfee7eb6cbe933bDouglas Gregor 109141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Missing macro name? 11084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) { 1113692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(MacroNameTok, diag::err_pp_missing_macro_name); 1123692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1133692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 1141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 115141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = MacroNameTok.getIdentifierInfo(); 116141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) { 117453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor bool Invalid = false; 118453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor std::string Spelling = getSpelling(MacroNameTok, &Invalid); 119453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (Invalid) 120453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor return; 121453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor 1229485d2382c1e3833ccbed20a185f6ab96d4dd703Chris Lattner const IdentifierInfo &Info = Identifiers.get(Spelling); 1239485d2382c1e3833ccbed20a185f6ab96d4dd703Chris Lattner if (Info.isCPlusPlusOperatorKeyword()) 124141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C++ 2.5p2: Alternative tokens behave the same as its primary token 125141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // except for their spellings. 12656b05c8829efd13b7e5b333f8f587c71d025c67dChris Lattner Diag(MacroNameTok, diag::err_pp_operator_used_as_macro_name) << Spelling; 127141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner else 128141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::err_pp_macro_not_identifier); 129141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Fall through on error. 130141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (isDefineUndef && II->getPPKeywordID() == tok::pp_defined) { 131141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error if defining "defined": C99 6.10.8.4. 132141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::err_defined_macro_name); 133141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (isDefineUndef && II->hasMacroDefinition() && 134141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner getMacroInfo(II)->isBuiltinMacro()) { 135141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error if defining "__LINE__" and other builtins: C99 6.10.8.4. 136141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (isDefineUndef == 1) 137141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::pp_redef_builtin_macro); 138141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner else 139141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::pp_undef_builtin_macro); 140141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 141141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we got a good identifier node. Return it. 142141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 143141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 145141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Invalid macro name, read and discard the rest of the line. Then set the 14684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // token kind to tok::eod. 14784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne MacroNameTok.setKind(tok::eod); 148141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return DiscardUntilEndOfDirective(); 149141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 150141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 15184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// CheckEndOfDirective - Ensure that the next token is a tok::eod token. If 15284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// not, emit a diagnostic and consume up until the eod. If EnableMacros is 153ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner/// true, then we consider macros that expand to zero tokens as being ok. 154ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattnervoid Preprocessor::CheckEndOfDirective(const char *DirType, bool EnableMacros) { 155141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tmp; 156ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner // Lex unexpanded tokens for most directives: macros might expand to zero 157ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner // tokens, causing us to miss diagnosing invalid lines. Some directives (like 158ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner // #line) allow empty macros. 159ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner if (EnableMacros) 160ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner Lex(Tmp); 161ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner else 162ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner LexUnexpandedToken(Tmp); 1631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 164141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // There should be no tokens after the directive, but we allow them as an 165141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // extension. 166141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (Tmp.is(tok::comment)) // Skip comments in -C mode. 167141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tmp); 1681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tmp.isNot(tok::eod)) { 170959875a66d74d38b8f2d499662afb142d249bf3eChris Lattner // Add a fixit in GNU/C99/C++ mode. Don't offer a fixit for strict-C89, 171b2eb53d9fd973a1a02e05e67a3307b3efd12eff2Peter Collingbourne // or if this is a macro-style preprocessing directive, because it is more 172b2eb53d9fd973a1a02e05e67a3307b3efd12eff2Peter Collingbourne // trouble than it is worth to insert /**/ and check that there is no /**/ 173b2eb53d9fd973a1a02e05e67a3307b3efd12eff2Peter Collingbourne // in the range also. 174849b243d4065f56742a4677d6dc8277609a151f8Douglas Gregor FixItHint Hint; 175b2eb53d9fd973a1a02e05e67a3307b3efd12eff2Peter Collingbourne if ((Features.GNUMode || Features.C99 || Features.CPlusPlus) && 176b2eb53d9fd973a1a02e05e67a3307b3efd12eff2Peter Collingbourne !CurTokenLexer) 177849b243d4065f56742a4677d6dc8277609a151f8Douglas Gregor Hint = FixItHint::CreateInsertion(Tmp.getLocation(),"//"); 178849b243d4065f56742a4677d6dc8277609a151f8Douglas Gregor Diag(Tmp, diag::ext_pp_extra_tokens_at_eol) << DirType << Hint; 179141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 180141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 181141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 182141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 183141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 184141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 185141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// SkipExcludedConditionalBlock - We just read a #if or related directive and 186141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// decided that the subsequent tokens are in the #if'd out portion of the 187141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// file. Lex the rest of the file, until we see an #endif. If 188141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// FoundNonSkipPortion is true, then we have already emitted code for part of 189141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// this #if directive, so #else/#elif blocks should never be entered. If ElseOk 190141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// is true, then #else directives are ok, if not, then we have already seen one 191141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// so a #else directive is a duplicate. When this returns, the caller can lex 192141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// the first valid token. 193141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::SkipExcludedConditionalBlock(SourceLocation IfTokenLoc, 194141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool FoundNonSkipPortion, 195141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool FoundElse) { 196141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumSkipped; 197f6452c5421c5db5a7ceff581525f286931d97f1aTed Kremenek assert(CurTokenLexer == 0 && CurPPLexer && "Lexing a macro, not a file?"); 198141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 19960e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->pushConditionalLevel(IfTokenLoc, /*isSkipping*/false, 200141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FoundNonSkipPortion, FoundElse); 2011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 202268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CurPTHLexer) { 203268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PTHSkipExcludedConditionalBlock(); 204268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return; 205268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 2061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 207141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Enter raw mode to disable identifier lookup (and thus macro expansion), 208141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // disabling warnings, etc. 20960e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = true; 210141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 211141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (1) { 2122c6b193d574e0780ff0b8450ce1fde105f4881acChris Lattner CurLexer->Lex(Tok); 2131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 214f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor if (Tok.is(tok::code_completion)) { 215f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor if (CodeComplete) 216f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor CodeComplete->CodeCompleteInConditionalExclusion(); 217f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor continue; 218f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor } 219f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor 220141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is the end of the buffer, we have an error. 221141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.is(tok::eof)) { 222141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Emit errors for each unterminated conditional on the stack, including 223141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the current one. 22460e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek while (!CurPPLexer->ConditionalStack.empty()) { 2252d474ba9e8ae43a1a5a9f72718c0d79092b9453fDouglas Gregor if (!isCodeCompletionFile(Tok.getLocation())) 2262d474ba9e8ae43a1a5a9f72718c0d79092b9453fDouglas Gregor Diag(CurPPLexer->ConditionalStack.back().IfLoc, 2272d474ba9e8ae43a1a5a9f72718c0d79092b9453fDouglas Gregor diag::err_pp_unterminated_conditional); 22860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ConditionalStack.pop_back(); 2291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 2301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 231141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Just return and let the caller lex after this #include. 232141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 233141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 2341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 235141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this token is not a preprocessor directive, just skip it. 236141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::hash) || !Tok.isAtStartOfLine()) 237141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 2381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 239141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We just parsed a # character at the start of a line, so we're in 240141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // directive mode. Tell the lexer this so any newlines we see will be 24184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // converted into an EOD token (this terminates the macro). 24260e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = true; 243ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(false); 244141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 2451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 246141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the next token, the directive flavor. 247141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 2481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 249141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this isn't an identifier directive (e.g. is "# 1\n" or "#\n", or 250141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // something bogus), skip it. 251c4bf2b9afb7d47445a9dc6bc848657098a4e3851Abramo Bagnara if (Tok.isNot(tok::raw_identifier)) { 25260e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 253141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 254ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 255141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 256141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 257141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 258141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the first letter isn't i or e, it isn't intesting to us. We know that 259141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // this is safe in the face of spelling differences, because there is no way 260141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // to spell an i/e in a strange way that is another letter. Skipping this 261141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // allows us to avoid looking up the identifier info for #define/#undef and 262141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // other common directives. 263c4bf2b9afb7d47445a9dc6bc848657098a4e3851Abramo Bagnara const char *RawCharData = Tok.getRawIdentifierData(); 264c4bf2b9afb7d47445a9dc6bc848657098a4e3851Abramo Bagnara 265141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner char FirstChar = RawCharData[0]; 2661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (FirstChar >= 'a' && FirstChar <= 'z' && 267141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FirstChar != 'i' && FirstChar != 'e') { 26860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 269141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 270ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 271141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 272141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 2731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 274141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the identifier name without trigraphs or embedded newlines. Note 275141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // that we can't use Tok.getIdentifierInfo() because its lookup is disabled 276141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // when skipping. 277b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer char DirectiveBuf[20]; 2785f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Directive; 279141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!Tok.needsCleaning() && Tok.getLength() < 20) { 2805f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Directive = StringRef(RawCharData, Tok.getLength()); 281141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 282141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner std::string DirectiveStr = getSpelling(Tok); 283b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer unsigned IdLen = DirectiveStr.size(); 284141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (IdLen >= 20) { 28560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 286141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 287ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 288141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 289141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 290b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer memcpy(DirectiveBuf, &DirectiveStr[0], IdLen); 2915f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Directive = StringRef(DirectiveBuf, IdLen); 292141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 2931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 294b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer if (Directive.startswith("if")) { 2955f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Sub = Directive.substr(2); 296b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer if (Sub.empty() || // "if" 297b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer Sub == "def" || // "ifdef" 298b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer Sub == "ndef") { // "ifndef" 299141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We know the entire #if/#ifdef/#ifndef block will be skipped, don't 300141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // bother parsing the condition. 301141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 30260e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->pushConditionalLevel(Tok.getLocation(), /*wasskipping*/true, 303141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*foundnonskip*/false, 3043a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth /*foundelse*/false); 3053a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth 3063a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth if (Callbacks) 3073a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth Callbacks->Endif(); 308141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 309b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer } else if (Directive[0] == 'e') { 3105f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Sub = Directive.substr(1); 311b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer if (Sub == "ndif") { // "endif" 31235410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("endif"); 313141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CondInfo; 314141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.WasSkipping = true; // Silence bogus warning. 31560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek bool InCond = CurPPLexer->popConditionalLevel(CondInfo); 316c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)InCond; // Silence warning in no-asserts mode. 317141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(!InCond && "Can't be skipping if not in a conditional!"); 3181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 319141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we popped the outermost skipping block, we're done skipping! 320141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!CondInfo.WasSkipping) 321141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 322b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer } else if (Sub == "lse") { // "else". 323141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #else directive in a skipping conditional. If not in some other 324141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // skipping conditional, and if #else hasn't already been seen, enter it 325141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // as a non-skipping conditional. 32660e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek PPConditionalInfo &CondInfo = CurPPLexer->peekConditionalLevel(); 3271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 328141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #else with a #else before it, report the error. 329141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.FoundElse) Diag(Tok, diag::pp_err_else_after_else); 3301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 331141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Note that we've seen a #else in this conditional. 332141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundElse = true; 3331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3343a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth if (Callbacks) 3353a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth Callbacks->Else(); 3363a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth 337141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the conditional is at the top level, and the #if block wasn't 338141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // entered, enter the #else block now. 339141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!CondInfo.WasSkipping && !CondInfo.FoundNonSkip) { 340141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundNonSkip = true; 341e26224e61c8a3b607c73c52f2cd0344065d7b412Argyrios Kyrtzidis CheckEndOfDirective("else"); 342141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 343e26224e61c8a3b607c73c52f2cd0344065d7b412Argyrios Kyrtzidis } else { 344e26224e61c8a3b607c73c52f2cd0344065d7b412Argyrios Kyrtzidis DiscardUntilEndOfDirective(); // C99 6.10p4. 345141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 346b939a4e8b471f6a5e996fa57b2fd9df30b59cb60Benjamin Kramer } else if (Sub == "lif") { // "elif". 34760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek PPConditionalInfo &CondInfo = CurPPLexer->peekConditionalLevel(); 348141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 349141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ShouldEnter; 3503a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth const SourceLocation ConditionalBegin = CurPPLexer->getSourceLocation(); 351141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is in a skipping block or if we're already handled this #if 352141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // block, don't bother parsing the condition. 353141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.WasSkipping || CondInfo.FoundNonSkip) { 354141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 355141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ShouldEnter = false; 356141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 357141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore the value of LexingRawMode so that identifiers are 358141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // looked up, etc, inside the #elif expression. 35960e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek assert(CurPPLexer->LexingRawMode && "We have to be skipping here!"); 36060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = false; 361141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *IfNDefMacro = 0; 362141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ShouldEnter = EvaluateDirectiveExpression(IfNDefMacro); 36360e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = true; 364141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 3653a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth const SourceLocation ConditionalEnd = CurPPLexer->getSourceLocation(); 3661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 367141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #elif with a #else before it, report the error. 368141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.FoundElse) Diag(Tok, diag::pp_err_elif_after_else); 3691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3703a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth if (Callbacks) 3713a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth Callbacks->Elif(SourceRange(ConditionalBegin, ConditionalEnd)); 3723a1a8749cf6239f29e834f18a4e08638126678d9Chandler Carruth 373141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this condition is true, enter it! 374141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ShouldEnter) { 375141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundNonSkip = true; 376141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 377141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 378141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 379141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 3801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 38160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = false; 382141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 383ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepComments); 384141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 385141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 386141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if we are out of the conditional (saw an #endif or ran off the end 387141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // of the file, just stop skipping and return to lexing whatever came after 388141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the #if block. 38960e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexingRawMode = false; 390141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 391141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 392268ee7016a2811803989487c0ad3799486092c63Ted Kremenekvoid Preprocessor::PTHSkipExcludedConditionalBlock() { 3931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump while (1) { 395268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPTHLexer); 396268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPTHLexer->LexingRawMode == false); 3971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 398268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Skip to the next '#else', '#elif', or #endif. 399268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CurPTHLexer->SkipBlock()) { 400268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // We have reached an #endif. Both the '#' and 'endif' tokens 401268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // have been consumed by the PTHLexer. Just pop off the condition level. 402268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PPConditionalInfo CondInfo; 403268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool InCond = CurPTHLexer->popConditionalLevel(CondInfo); 404c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)InCond; // Silence warning in no-asserts mode. 405268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(!InCond && "Can't be skipping if not in a conditional!"); 406268ee7016a2811803989487c0ad3799486092c63Ted Kremenek break; 407268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 4081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 409268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // We have reached a '#else' or '#elif'. Lex the next token to get 410268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // the directive flavor. 411268ee7016a2811803989487c0ad3799486092c63Ted Kremenek Token Tok; 412268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LexUnexpandedToken(Tok); 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 414268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // We can actually look up the IdentifierInfo here since we aren't in 415268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // raw mode. 416268ee7016a2811803989487c0ad3799486092c63Ted Kremenek tok::PPKeywordKind K = Tok.getIdentifierInfo()->getPPKeywordID(); 417268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 418268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (K == tok::pp_else) { 419268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #else: Enter the else condition. We aren't in a nested condition 420268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // since we skip those. We're always in the one matching the last 421268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // blocked we skipped. 422268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PPConditionalInfo &CondInfo = CurPTHLexer->peekConditionalLevel(); 423268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Note that we've seen a #else in this conditional. 424268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CondInfo.FoundElse = true; 4251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 426268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If the #if block wasn't entered then enter the #else block now. 427268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (!CondInfo.FoundNonSkip) { 428268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CondInfo.FoundNonSkip = true; 4291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 43084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Scan until the eod token. 431e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = true; 4328533bd5a32a12c51341e82d2aef083acbac7c04cDaniel Dunbar DiscardUntilEndOfDirective(); 433e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = false; 4341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 435268ee7016a2811803989487c0ad3799486092c63Ted Kremenek break; 436268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 4371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 438268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise skip this block. 439268ee7016a2811803989487c0ad3799486092c63Ted Kremenek continue; 440268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 4411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 442268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(K == tok::pp_elif); 443268ee7016a2811803989487c0ad3799486092c63Ted Kremenek PPConditionalInfo &CondInfo = CurPTHLexer->peekConditionalLevel(); 444268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 445268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If this is a #elif with a #else before it, report the error. 446268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CondInfo.FoundElse) 447268ee7016a2811803989487c0ad3799486092c63Ted Kremenek Diag(Tok, diag::pp_err_elif_after_else); 4481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 449268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If this is in a skipping block or if we're already handled this #if 4501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // block, don't bother parsing the condition. We just skip this block. 451268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (CondInfo.FoundNonSkip) 452268ee7016a2811803989487c0ad3799486092c63Ted Kremenek continue; 453268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 454268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Evaluate the condition of the #elif. 455268ee7016a2811803989487c0ad3799486092c63Ted Kremenek IdentifierInfo *IfNDefMacro = 0; 456268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = true; 457268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool ShouldEnter = EvaluateDirectiveExpression(IfNDefMacro); 458268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPTHLexer->ParsingPreprocessorDirective = false; 459268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 460268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If this condition is true, enter it! 461268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (ShouldEnter) { 462268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CondInfo.FoundNonSkip = true; 463268ee7016a2811803989487c0ad3799486092c63Ted Kremenek break; 464268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 465268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 466268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, skip this block and go to the next one. 467268ee7016a2811803989487c0ad3799486092c63Ted Kremenek continue; 468268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 469268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 470268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 4711072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// LookupFile - Given a "foo" or <foo> reference, look up the indicated file, 4721072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// return null on failure. isAngled indicates whether the file reference is 4731072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// for system #include's or not (i.e. using <> instead of ""). 474b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruthconst FileEntry *Preprocessor::LookupFile( 4755f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Filename, 476b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth bool isAngled, 477b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const DirectoryLookup *FromDir, 478b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const DirectoryLookup *&CurDir, 4795f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<char> *SearchPath, 4805f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<char> *RelativePath) { 4811072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // If the header lookup mechanism may be relative to the current file, pass in 4821072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // info about where the current file is. 48310fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor const FileEntry *CurFileEnt = 0; 4841072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if (!FromDir) { 4852b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = getCurrentFileLexer()->getFileID(); 48610fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor CurFileEnt = SourceMgr.getFileEntryForID(FID); 4871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 488be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner // If there is no file entry associated with this file, it must be the 489be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner // predefines buffer. Any other file is not lexed with a normal lexer, so 49010fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // it won't be scanned for preprocessor directives. If we have the 49110fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // predefines buffer, resolve #include references (which come from the 49210fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // -include command line argument) as if they came from the main file, this 49310fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor // affects file lookup etc. 49410fe93d57c11f068aa4d78eb4ca7f60329818306Douglas Gregor if (CurFileEnt == 0) { 495be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner FID = SourceMgr.getMainFileID(); 496be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner CurFileEnt = SourceMgr.getFileEntryForID(FID); 497be5c64d7a765acaf9454e7a511233771472bf811Chris Lattner } 4981072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 4991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5001072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Do a standard file entry lookup. 5011072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner CurDir = CurDirLookup; 502b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const FileEntry *FE = HeaderInfo.LookupFile( 5037412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek Filename, isAngled, FromDir, CurDir, CurFileEnt, 5047412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek SearchPath, RelativePath); 505f45b646244705410866d62f1d8bf017a047ed662Chris Lattner if (FE) return FE; 5061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5071072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Otherwise, see if this is a subframework header. If so, this is relative 5081072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // to one of the headers on the #include stack. Walk the list of the current 5091072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // headers on the #include stack and pass them to HeaderInfo. 51081d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer()) { 51141938c8493b4380df738263166b746eacb33c309Ted Kremenek if ((CurFileEnt = SourceMgr.getFileEntryForID(CurPPLexer->getFileID()))) 512b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth if ((FE = HeaderInfo.LookupSubframeworkHeader(Filename, CurFileEnt, 5137412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek SearchPath, RelativePath))) 5141072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return FE; 5151072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5171072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner for (unsigned i = 0, e = IncludeMacroStack.size(); i != e; ++i) { 5181072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner IncludeStackInfo &ISEntry = IncludeMacroStack[e-i-1]; 51981d24e135c60dcbe421864e6a4334ba99b8fe7ecTed Kremenek if (IsFileLexer(ISEntry)) { 5201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if ((CurFileEnt = 52141938c8493b4380df738263166b746eacb33c309Ted Kremenek SourceMgr.getFileEntryForID(ISEntry.ThePPLexer->getFileID()))) 5227412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek if ((FE = HeaderInfo.LookupSubframeworkHeader( 5237412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek Filename, CurFileEnt, SearchPath, RelativePath))) 5241072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return FE; 5251072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5261072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 5271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5281072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Otherwise, we really couldn't find the file. 5291072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return 0; 5301072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner} 5311072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner 532141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 533141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 534141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Directive Handling. 535141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 536141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 537141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleDirective - This callback is invoked when the lexer sees a # token 5381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// at the start of a line. This consumes the directive, modifies the 539141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// lexer/preprocessor state, and advances the lexer(s) so that the next token 540141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// read is the correct one. 541141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleDirective(Token &Result) { 542141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // FIXME: Traditional: # with whitespace before it not recognized by K&R? 5431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 544141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We just parsed a # character at the start of a line, so we're in directive 545141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // mode. Tell the lexer this so any newlines we see will be converted into an 54684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // EOD token (which terminates the directive). 54760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->ParsingPreprocessorDirective = true; 5481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 549141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumDirectives; 550193575455e00eca03fd7177f60e3f2e6263cb661Kovarththanan Rajaratnam 551141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We are about to read a token. For the multiple-include optimization FA to 5521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // work, we have to remember if we had read any tokens *before* this 553141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // pp-directive. 5541d9c54df56391ac4740db27d551782e81189cb51Chris Lattner bool ReadAnyTokensBeforeDirective =CurPPLexer->MIOpt.getHasReadAnyTokensVal(); 5551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 55642aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // Save the '#' token in case we need to return it later. 55742aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner Token SavedHash = Result; 5581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 559141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the next token, the directive flavor. This isn't expanded due to 560141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3p8. 561141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Result); 5621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 563141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3p11: Is this preprocessor directive in macro invocation? e.g.: 564141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define A(x) #x 565141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // A(abc 566141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #warning blah 567141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // def) 568141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If so, the user is relying on non-portable behavior, emit a diagnostic. 569141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (InMacroArgs) 570141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::ext_embedded_directive); 5711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 572141e71fec621f65ab401dbe66609f7d3c033c6a5Chris LattnerTryAgain: 573141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Result.getKind()) { 57484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: 575141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; // null directive. 576141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::comment: 577141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Handle stuff like "# /*foo*/ define X" in -E -C mode. 578141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Result); 579141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner goto TryAgain; 580f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor case tok::code_completion: 581f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor if (CodeComplete) 582f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor CodeComplete->CodeCompleteDirective( 583f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor CurPPLexer->getConditionalStackDepth() > 0); 584f44e854ed1e3aa86d2ed6d615ccd109d50ddcff9Douglas Gregor return; 585478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner case tok::numeric_constant: // # 7 GNU line marker directive. 5865f607c4b75abeedded11eff079dee73561d98203Chris Lattner if (getLangOptions().AsmPreprocessor) 5875f607c4b75abeedded11eff079dee73561d98203Chris Lattner break; // # 4 is not a preprocessor directive in .S files. 588478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return HandleDigitDirective(Result); 589141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 590141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = Result.getIdentifierInfo(); 591141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) break; // Not an identifier. 5921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 593141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Ask what the preprocessor keyword ID is. 594141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (II->getPPKeywordID()) { 595141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: break; 596141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.1 - Conditional Inclusion. 597141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_if: 598141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfDirective(Result, ReadAnyTokensBeforeDirective); 599141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ifdef: 600141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfdefDirective(Result, false, true/*not valid for miopt*/); 601141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ifndef: 602141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfdefDirective(Result, true, ReadAnyTokensBeforeDirective); 603141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_elif: 604141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleElifDirective(Result); 605141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_else: 606141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleElseDirective(Result); 607141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_endif: 608141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleEndifDirective(Result); 6091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 610141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.2 - Source File Inclusion. 611141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_include: 612ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor // Handle #include. 613ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeDirective(SavedHash.getLocation(), Result); 614b8e240ed8b8f58c7b7fe82776bd6147b437f5d53Chris Lattner case tok::pp___include_macros: 615ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor // Handle -imacros. 616ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeMacrosDirective(SavedHash.getLocation(), Result); 6171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 618141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3 - Macro Replacement. 619141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_define: 620141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleDefineDirective(Result); 621141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_undef: 622141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUndefDirective(Result); 623141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 624141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.4 - Line Control. 625141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_line: 626359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner return HandleLineDirective(Result); 6271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 628141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.5 - Error Directive. 629141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_error: 630141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUserDiagnosticDirective(Result, false); 6311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 632141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.6 - Pragma Directive. 633141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_pragma: 63480c60f72848896f867f6b7e664e7060d9e78f019Douglas Gregor return HandlePragmaDirective(PIK_HashPragma); 6351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 636141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // GNU Extensions. 637141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_import: 638ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleImportDirective(SavedHash.getLocation(), Result); 639141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_include_next: 640ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeNextDirective(SavedHash.getLocation(), Result); 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 642141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_warning: 643141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::ext_pp_warning_directive); 644141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUserDiagnosticDirective(Result, true); 645141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ident: 646141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIdentSCCSDirective(Result); 647141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_sccs: 648141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIdentSCCSDirective(Result); 649141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_assert: 650141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner //isExtension = true; // FIXME: implement #assert 651141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 652141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_unassert: 653141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner //isExtension = true; // FIXME: implement #unassert 654141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 655141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 656141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 657141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 6581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 65942aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // If this is a .S file, treat unknown # directives as non-preprocessor 66042aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // directives. This is important because # may be a comment or introduce 66142aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // various pseudo-ops. Just return the # token and push back the following 66242aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // token to be lexed next time. 66342aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner if (getLangOptions().AsmPreprocessor) { 6643d399a010102966158f6b69b07d636f113dc6ab4Daniel Dunbar Token *Toks = new Token[2]; 66542aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // Return the # and the token after it. 6661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Toks[0] = SavedHash; 66742aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner Toks[1] = Result; 668ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner 669ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner // If the second token is a hashhash token, then we need to translate it to 670ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner // unknown so the token lexer doesn't try to perform token pasting. 671ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner if (Result.is(tok::hashhash)) 672ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner Toks[1].setKind(tok::unknown); 673ba3ca5271a01eae7cbd6a19ace004d75012c02a8Chris Lattner 67442aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // Enter this token stream so that we re-lex the tokens. Make sure to 67542aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // enable macro expansion, in case the token after the # is an identifier 67642aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner // that is expanded. 67742aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner EnterTokenStream(Toks, 2, false, true); 67842aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner return; 67942aa16cccb3d6cd4195ccff9c32d8cb50a25a094Chris Lattner } 6801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 681141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we reached here, the preprocessing token is not valid! 682141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::err_pp_invalid_directive); 6831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 684141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the PP line. 685141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 6861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 687141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we're done parsing the directive. 688141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 689141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 690478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// GetLineValue - Convert a numeric token into an unsigned value, emitting 691478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// Diagnostic DiagID if it is invalid, and returning the value in Val. 692478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnerstatic bool GetLineValue(Token &DigitTok, unsigned &Val, 693478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned DiagID, Preprocessor &PP) { 694359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner if (DigitTok.isNot(tok::numeric_constant)) { 695478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(DigitTok, DiagID); 6961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 69784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (DigitTok.isNot(tok::eod)) 698478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.DiscardUntilEndOfDirective(); 699478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 700359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 7011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 702359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner llvm::SmallString<64> IntegerBuffer; 703359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner IntegerBuffer.resize(DigitTok.getLength()); 704359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner const char *DigitTokBegin = &IntegerBuffer[0]; 705453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor bool Invalid = false; 706453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor unsigned ActualLength = PP.getSpelling(DigitTok, DigitTokBegin, &Invalid); 707453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (Invalid) 708453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor return true; 709453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor 710dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner // Verify that we have a simple digit-sequence, and compute the value. This 711dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner // is always a simple digit string computed in decimal, so we do this manually 712dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner // here. 713dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner Val = 0; 714dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner for (unsigned i = 0; i != ActualLength; ++i) { 715dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (!isdigit(DigitTokBegin[i])) { 716dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(DigitTok.getLocation(), i), 717dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner diag::err_pp_line_digit_sequence); 718dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.DiscardUntilEndOfDirective(); 719dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner return true; 720dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner } 7211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 722dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner unsigned NextVal = Val*10+(DigitTokBegin[i]-'0'); 723dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (NextVal < Val) { // overflow. 724dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.Diag(DigitTok, DiagID); 725dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.DiscardUntilEndOfDirective(); 726dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner return true; 727dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner } 728dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner Val = NextVal; 729359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 7301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Reject 0, this is needed both by #line numbers and flags. 732478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (Val == 0) { 733478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(DigitTok, DiagID); 734478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.DiscardUntilEndOfDirective(); 735478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 736359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 7371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 738dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (DigitTokBegin[0] == '0') 739dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner PP.Diag(DigitTok.getLocation(), diag::warn_pp_line_decimal); 7401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 741478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return false; 742478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner} 743478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 7441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// HandleLineDirective - Handle #line directive: C99 6.10.4. The two 745478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// acceptable forms are: 746478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # line digit-sequence 747478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # line digit-sequence "s-char-sequence" 748478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnervoid Preprocessor::HandleLineDirective(Token &Tok) { 749478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Read the line # and string argument. Per C99 6.10.4p5, these tokens are 750478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // expanded. 751478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Token DigitTok; 752478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Lex(DigitTok); 753478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 754478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Validate the number and convert it to an unsigned. 755478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned LineNo; 756dc8c90da158030c0d0c62539e2da0adccc09f271Chris Lattner if (GetLineValue(DigitTok, LineNo, diag::err_pp_line_requires_integer,*this)) 757478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return; 758478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 759478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Enforce C99 6.10.4p3: "The digit sequence shall not specify ... a 760478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // number greater than 2147483647". C90 requires that the line # be <= 32767. 761359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner unsigned LineLimit = Features.C99 ? 2147483648U : 32768U; 762359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner if (LineNo >= LineLimit) 763359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(DigitTok, diag::ext_pp_line_too_big) << LineLimit; 7641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7655b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner int FilenameID = -1; 766359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Token StrTok; 767359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Lex(StrTok); 768359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner 76984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the StrTok is "eod", then it wasn't present. Otherwise, it must be a 77084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // string followed by eod. 77184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (StrTok.is(tok::eod)) 772359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner ; // ok 773359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner else if (StrTok.isNot(tok::string_literal)) { 774359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(StrTok, diag::err_pp_line_invalid_filename); 775359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner DiscardUntilEndOfDirective(); 776359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner return; 777359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } else { 7785b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner // Parse and validate the string, converting it into a unique ID. 7795b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner StringLiteralParser Literal(&StrTok, 1, *this); 7805cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert(Literal.isAscii() && "Didn't allow wide strings in"); 7815b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.hadError) 7825b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 7835b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.Pascal) { 7845b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner Diag(StrTok, diag::err_pp_linemarker_invalid_filename); 7855b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 7865b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner } 78765aa6885818d4b4eea2e5a9d12085b2398148662Jay Foad FilenameID = SourceMgr.getLineTableFilenameID(Literal.GetString()); 7881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 78984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Verify that there is nothing after the string, other than EOD. Because 790ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner // of C99 6.10.4p5, macros that expand to empty tokens are ok. 791ab82f41b217ce588a9456c0b4411f219d3ed0df8Chris Lattner CheckEndOfDirective("line", true); 792359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner } 7931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7944c4ea17d7f991516c37a871dfa4bbe5723fa85f0Chris Lattner SourceMgr.AddLineNote(DigitTok.getLocation(), LineNo, FilenameID); 7951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 79616629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (Callbacks) 79786d0ef74303e9164a0860ce849af597d34f937abChris Lattner Callbacks->FileChanged(CurPPLexer->getSourceLocation(), 79886d0ef74303e9164a0860ce849af597d34f937abChris Lattner PPCallbacks::RenameFile, 79916629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner SrcMgr::C_User); 800359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner} 801359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner 802478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// ReadLineMarkerFlags - Parse and validate any flags at the end of a GNU line 803478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// marker directive. 804478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnerstatic bool ReadLineMarkerFlags(bool &IsFileEntry, bool &IsFileExit, 805478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner bool &IsSystemHeader, bool &IsExternCHeader, 806478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Preprocessor &PP) { 807478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned FlagVal; 808478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Token FlagTok; 809478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 81084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 811478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag, PP)) 812478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 813478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 814478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (FlagVal == 1) { 815478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsFileEntry = true; 8161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 817478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 81884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 819478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag,PP)) 820478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 821478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } else if (FlagVal == 2) { 822478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsFileExit = true; 8231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 824137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner SourceManager &SM = PP.getSourceManager(); 825137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // If we are leaving the current presumed file, check to make sure the 826137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // presumed include stack isn't empty! 827137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner FileID CurFileID = 828e7b2b6e87dbe5b1207f77b6ff9c210a02f95bb39Chandler Carruth SM.getDecomposedExpansionLoc(FlagTok.getLocation()).first; 829137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner PresumedLoc PLoc = SM.getPresumedLoc(FlagTok.getLocation()); 830cb7b1e17b63967317ab5cc55682168cf0380519aDouglas Gregor if (PLoc.isInvalid()) 831cb7b1e17b63967317ab5cc55682168cf0380519aDouglas Gregor return true; 832cb7b1e17b63967317ab5cc55682168cf0380519aDouglas Gregor 833137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // If there is no include loc (main file) or if the include loc is in a 834137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner // different physical file, then we aren't in a "1" line marker flag region. 835137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner SourceLocation IncLoc = PLoc.getIncludeLoc(); 836137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner if (IncLoc.isInvalid() || 837e7b2b6e87dbe5b1207f77b6ff9c210a02f95bb39Chandler Carruth SM.getDecomposedExpansionLoc(IncLoc).first != CurFileID) { 838137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_pop); 839137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner PP.DiscardUntilEndOfDirective(); 840137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner return true; 841137b6a6149c53dbbcb8fba98e524d9ad0f3c8736Chris Lattner } 8421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 843478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 84484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 845478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag,PP)) 846478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 847478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 848478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 849478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // We must have 3 if there are still flags. 850478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (FlagVal != 3) { 851478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_flag); 8525b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner PP.DiscardUntilEndOfDirective(); 853478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 854478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 8551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 856478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsSystemHeader = true; 8571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 858478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 85984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 8609d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner if (GetLineValue(FlagTok, FlagVal, diag::err_pp_linemarker_invalid_flag, PP)) 861478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 862478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 863478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // We must have 4 if there is yet another flag. 864478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (FlagVal != 4) { 865478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_flag); 8665b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner PP.DiscardUntilEndOfDirective(); 867478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 868478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 8691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 870478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner IsExternCHeader = true; 8711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 872478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Lex(FlagTok); 87384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (FlagTok.is(tok::eod)) return false; 874478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 875478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // There are no more valid flags here. 876478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner PP.Diag(FlagTok, diag::err_pp_linemarker_invalid_flag); 8775b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner PP.DiscardUntilEndOfDirective(); 878478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return true; 879478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner} 880478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 881478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// HandleDigitDirective - Handle a GNU line marker directive, whose syntax is 882478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// one of the following forms: 883478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// 884478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # 42 8851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// # 42 "file" ('1' | '2')? 886478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// # 42 "file" ('1' | '2')? '3' '4'? 887478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner/// 888478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattnervoid Preprocessor::HandleDigitDirective(Token &DigitTok) { 889478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // Validate the number and convert it to an unsigned. GNU does not have a 890478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // line # limit other than it fit in 32-bits. 891478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner unsigned LineNo; 892478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner if (GetLineValue(DigitTok, LineNo, diag::err_pp_linemarker_requires_integer, 893478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner *this)) 894478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return; 8951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 896478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Token StrTok; 897478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Lex(StrTok); 8981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 899478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner bool IsFileEntry = false, IsFileExit = false; 900478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner bool IsSystemHeader = false, IsExternCHeader = false; 9015b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner int FilenameID = -1; 9025b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner 90384021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the StrTok is "eod", then it wasn't present. Otherwise, it must be a 90484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // string followed by eod. 90584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (StrTok.is(tok::eod)) 906478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner ; // ok 907478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner else if (StrTok.isNot(tok::string_literal)) { 908478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner Diag(StrTok, diag::err_pp_linemarker_invalid_filename); 9095b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 910478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } else { 9115b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner // Parse and validate the string, converting it into a unique ID. 9125b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner StringLiteralParser Literal(&StrTok, 1, *this); 9135cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert(Literal.isAscii() && "Didn't allow wide strings in"); 9145b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.hadError) 9155b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 9165b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner if (Literal.Pascal) { 9175b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner Diag(StrTok, diag::err_pp_linemarker_invalid_filename); 9185b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner return DiscardUntilEndOfDirective(); 9195b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner } 92065aa6885818d4b4eea2e5a9d12085b2398148662Jay Foad FilenameID = SourceMgr.getLineTableFilenameID(Literal.GetString()); 9211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 922478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner // If a filename was present, read any flags that are present. 9231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (ReadLineMarkerFlags(IsFileEntry, IsFileExit, 9245b9a504720fb52594ca3686e10eb6c0cfa2e7d62Chris Lattner IsSystemHeader, IsExternCHeader, *this)) 925478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner return; 926478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner } 9271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9289d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner // Create a line note with this information. 9299d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner SourceMgr.AddLineNote(DigitTok.getLocation(), LineNo, FilenameID, 9301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump IsFileEntry, IsFileExit, 9319d79ebac47ffde6a1cb312f4c09b66b1b9a397fbChris Lattner IsSystemHeader, IsExternCHeader); 9321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 93316629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner // If the preprocessor has callbacks installed, notify them of the #line 93416629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner // change. This is used so that the line marker comes out in -E mode for 93516629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner // example. 93616629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (Callbacks) { 93716629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner PPCallbacks::FileChangeReason Reason = PPCallbacks::RenameFile; 93816629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (IsFileEntry) 93916629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner Reason = PPCallbacks::EnterFile; 94016629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner else if (IsFileExit) 94116629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner Reason = PPCallbacks::ExitFile; 94216629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner SrcMgr::CharacteristicKind FileKind = SrcMgr::C_User; 94316629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner if (IsExternCHeader) 94416629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner FileKind = SrcMgr::C_ExternCSystem; 94516629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner else if (IsSystemHeader) 94616629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner FileKind = SrcMgr::C_System; 9471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 94886d0ef74303e9164a0860ce849af597d34f937abChris Lattner Callbacks->FileChanged(CurPPLexer->getSourceLocation(), Reason, FileKind); 94916629386f1326608dc1ff9f4ff785fb3fae0bfb3Chris Lattner } 950478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner} 951478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 952478a18ec47fdb7e0e580a2635648456e9db9ad4fChris Lattner 953099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner/// HandleUserDiagnosticDirective - Handle a #warning or #error directive. 954099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner/// 9551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid Preprocessor::HandleUserDiagnosticDirective(Token &Tok, 956141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isWarning) { 957099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner // PTH doesn't emit #warning or #error directives. 958099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner if (CurPTHLexer) 959359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner return CurPTHLexer->DiscardToEndOfLine(); 960359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner 961141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the line raw. We do this because we don't want macros 962141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // to be expanded and we don't require that the tokens be valid preprocessing 963141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // tokens. For example, this is allowed: "#warning ` 'foo". GCC does 964141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // collapse multiple consequtive white space between tokens, but this isn't 965141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // specified by the standard. 966359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner std::string Message = CurLexer->ReadToEndOfLine(); 967359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner if (isWarning) 968359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(Tok, diag::pp_hash_warning) << Message; 969359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner else 970359cc4475487ea0a660b3e8918334a2866e71c66Chris Lattner Diag(Tok, diag::err_pp_hash_error) << Message; 971141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 972141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 973141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIdentSCCSDirective - Handle a #ident/#sccs directive. 974141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 975141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIdentSCCSDirective(Token &Tok) { 976141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, this directive is an extension. 977141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::ext_pp_ident_directive); 9781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 979141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the string argument. 980141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token StrTok; 981141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Lex(StrTok); 9821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 983141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the token kind isn't a string, it's a malformed directive. 984141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (StrTok.isNot(tok::string_literal) && 9853692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner StrTok.isNot(tok::wide_string_literal)) { 9863692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(StrTok, diag::err_pp_malformed_ident); 98784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (StrTok.isNot(tok::eod)) 988099dd05b579ccefa97bd4f4a3088d4c262f080e4Chris Lattner DiscardUntilEndOfDirective(); 9893692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 9903692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 9911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 99284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Verify that there is nothing after the string, other than EOD. 99335410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("ident"); 994141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 995453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (Callbacks) { 996453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor bool Invalid = false; 997453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor std::string Str = getSpelling(StrTok, &Invalid); 998453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor if (!Invalid) 999453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor Callbacks->Ident(Tok.getLocation(), Str); 1000453091cc2082e207ea2c2dda645a9bc01b37fb0cDouglas Gregor } 1001141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1002141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1003141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1004141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Include Directive Handling. 1005141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1006141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1007141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// GetIncludeFilenameSpelling - Turn the specified lexer token into a fully 1008141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// checked and spelled filename, e.g. as an operand of #include. This returns 1009141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// true if the input filename was in <>'s or false if it were in ""'s. The 1010141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// caller is expected to provide a buffer that is large enough to hold the 1011141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// spelling of the filename, but is also expected to handle the case when 1012141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// this method decides to use a different buffer. 1013141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerbool Preprocessor::GetIncludeFilenameSpelling(SourceLocation Loc, 10145f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef &Buffer) { 1015141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the text form of the filename. 1016a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner assert(!Buffer.empty() && "Can't have tokens with empty spellings!"); 10171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1018141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Make sure the filename is <x> or "x". 1019141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isAngled; 1020a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer[0] == '<') { 1021a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer.back() != '>') { 1022141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 10235f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1024141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1025141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1026141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner isAngled = true; 1027a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner } else if (Buffer[0] == '"') { 1028a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer.back() != '"') { 1029141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 10305f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1031141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1032141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1033141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner isAngled = false; 1034141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 1035141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 10365f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1037141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1038141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 10391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1040141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Diagnose #include "" as invalid. 1041a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Buffer.size() <= 2) { 1042141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_empty_filename); 10435f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner Buffer = StringRef(); 1044a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner return true; 1045141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 10461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1047141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Skip the brackets. 1048a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner Buffer = Buffer.substr(1, Buffer.size()-2); 1049141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return isAngled; 1050141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1051141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1052141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ConcatenateIncludeName - Handle cases where the #include name is expanded 1053141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// from a macro as multiple tokens, which need to be glued together. This 1054141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// occurs for code like: 1055141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #define FOO <a/b.h> 1056141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #include FOO 1057141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// because in this case, "<a/b.h>" is returned as 7 tokens, not one. 1058141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1059141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// This code concatenates and consumes tokens up to the '>' token. It returns 1060141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// false if the > was found, otherwise it returns true if it finds and consumes 106184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne/// the EOD marker. 1062a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompsonbool Preprocessor::ConcatenateIncludeName( 1063ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor llvm::SmallString<128> &FilenameBuffer, 1064ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor SourceLocation &End) { 1065141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token CurTok; 10661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1067a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Lex(CurTok); 106884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (CurTok.isNot(tok::eod)) { 1069ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor End = CurTok.getLocation(); 1070ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor 107125bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor // FIXME: Provide code completion for #includes. 107225bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor if (CurTok.is(tok::code_completion)) { 107325bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor Lex(CurTok); 107425bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor continue; 107525bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor } 107625bb03bc0f2561e830d866d5905b20c5475d6762Douglas Gregor 1077141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Append the spelling of this token to the buffer. If there was a space 1078141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // before it, add it now. 1079141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.hasLeadingSpace()) 1080141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.push_back(' '); 10811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1082141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the spelling of the token, directly into FilenameBuffer if possible. 1083141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned PreAppendSize = FilenameBuffer.size(); 1084141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.resize(PreAppendSize+CurTok.getLength()); 10851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1086141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const char *BufPtr = &FilenameBuffer[PreAppendSize]; 1087a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson unsigned ActualLen = getSpelling(CurTok, BufPtr); 10881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1089141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the token was spelled somewhere else, copy it into FilenameBuffer. 1090141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (BufPtr != &FilenameBuffer[PreAppendSize]) 1091141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner memcpy(&FilenameBuffer[PreAppendSize], BufPtr, ActualLen); 10921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1093141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Resize FilenameBuffer to the correct size. 1094141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.getLength() != ActualLen) 1095141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.resize(PreAppendSize+ActualLen); 10961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1097141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we found the '>' marker, return success. 1098141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.is(tok::greater)) 1099141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 11001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1101a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Lex(CurTok); 1102141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1103141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 110484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If we hit the eod marker, emit an error and return true so that the caller 110584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // knows the EOD has been read. 1106a28cc090f265d5bdaef9ebb24fb9d579928d3a18John Thompson Diag(CurTok.getLocation(), diag::err_pp_expects_filename); 1107141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1108141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1109141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1110141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIncludeDirective - The "#include" tokens have just been read, read the 1111141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// file to be included from the lexer, then include it! This is a common 1112141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// routine with functionality shared between #include, #include_next and 1113721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner/// #import. LookupFrom is set when this is a #include_next directive, it 11141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// specifies the file to start searching from. 1115ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleIncludeDirective(SourceLocation HashLoc, 1116ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &IncludeTok, 1117141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *LookupFrom, 1118141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isImport) { 1119141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1120141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token FilenameTok; 112160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->LexIncludeFilename(FilenameTok); 11221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1123141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Reserve a buffer to get the spelling. 1124a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner llvm::SmallString<128> FilenameBuffer; 11255f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Filename; 1126ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor SourceLocation End; 1127ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor 1128141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (FilenameTok.getKind()) { 112984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: 113084021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // If the token kind is EOD, the error has already been diagnosed. 1131141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 11321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1133141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::angle_string_literal: 1134ddeea5644367c9c153c9fee9e51bdea85ce43cbdBenjamin Kramer case tok::string_literal: 1135ddeea5644367c9c153c9fee9e51bdea85ce43cbdBenjamin Kramer Filename = getSpelling(FilenameTok, FilenameBuffer); 1136ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor End = FilenameTok.getLocation(); 1137141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 11381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1139141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::less: 1140141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // This could be a <foo/bar.h> file coming from a macro expansion. In this 1141141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // case, glue the tokens together into FilenameBuffer and interpret those. 1142141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.push_back('<'); 1143ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor if (ConcatenateIncludeName(FilenameBuffer, End)) 114484021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne return; // Found <eod> but no ">"? Diagnostic already emitted. 1145a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner Filename = FilenameBuffer.str(); 1146141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 1147141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 1148141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename); 1149141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 1150141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1151141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 11521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1153193575455e00eca03fd7177f60e3f2e6263cb661Kovarththanan Rajaratnam bool isAngled = 1154a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner GetIncludeFilenameSpelling(FilenameTok.getLocation(), Filename); 1155141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If GetIncludeFilenameSpelling set the start ptr to null, there was an 1156141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // error. 1157a139481e62fdb209d9d87a54a5733f989d2e8d51Chris Lattner if (Filename.empty()) { 1158141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 1159141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1160141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 11611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne // Verify that there is nothing after the filename, other than EOD. Note that 11639cb51ce03caf0755759f7e67aea7d4be684ff738Chris Lattner // we allow macros that expand to nothing after the filename, because this 11649cb51ce03caf0755759f7e67aea7d4be684ff738Chris Lattner // falls into the category of "#include pp-tokens new-line" specified in 11659cb51ce03caf0755759f7e67aea7d4be684ff738Chris Lattner // C99 6.10.2p4. 1166e013d685c6689ac7ae103ee88acf573422d1ed6aDaniel Dunbar CheckEndOfDirective(IncludeTok.getIdentifierInfo()->getNameStart(), true); 1167141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1168141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check that we don't have infinite #include recursion. 11693692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (IncludeMacroStack.size() == MaxAllowedIncludeStackDepth-1) { 11703692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(FilenameTok, diag::err_pp_include_too_deep); 11713692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 11723692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 11731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1174141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Search include directories. 1175141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *CurDir; 11767412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek llvm::SmallString<1024> SearchPath; 11777412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek llvm::SmallString<1024> RelativePath; 1178b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth // We get the raw path only if we have 'Callbacks' to which we later pass 1179b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth // the path. 1180b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth const FileEntry *File = LookupFile( 11817412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek Filename, isAngled, LookupFrom, CurDir, 11827412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek Callbacks ? &SearchPath : NULL, Callbacks ? &RelativePath : NULL); 1183193575455e00eca03fd7177f60e3f2e6263cb661Kovarththanan Rajaratnam 1184ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor // Notify the callback object that we've seen an inclusion directive. 1185ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor if (Callbacks) 1186b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth Callbacks->InclusionDirective(HashLoc, IncludeTok, Filename, isAngled, File, 11877412494982c8b50c90961302c3a718633b2c3ab7Manuel Klimek End, SearchPath, RelativePath); 1188b5142bb7af5c70fffd09f05172a1379a35a9c29aChandler Carruth 1189bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne if (File == 0) { 1190bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne Diag(FilenameTok, diag::warn_pp_file_not_found) << Filename; 1191bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne return; 1192bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne } 1193bb52786da8d055568eef6e5694288c1258bc8c2aPeter Collingbourne 1194721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner // The #included file will be considered to be a system header if either it is 1195721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner // in a system include directory, or if the #includer is a system include 1196721818304ac462d8c6ce05eecd02884033db78f1Chris Lattner // header. 11971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SrcMgr::CharacteristicKind FileCharacter = 11980b9e736308af5397f558ffc8e780c438c2fdb563Chris Lattner std::max(HeaderInfo.getFileDirFlavor(File), 1199693faa6e6918994bc22aacf078a889bb93e0fe25Chris Lattner SourceMgr.getFileCharacteristic(FilenameTok.getLocation())); 12001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12016fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner // Ask HeaderInfo if we should enter this #include file. If not, #including 12026fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner // this file will have no effect. 12036fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner if (!HeaderInfo.ShouldEnterIncludeFile(File, isImport)) { 1204e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner if (Callbacks) 12056fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner Callbacks->FileSkipped(*File, FilenameTok, FileCharacter); 12066fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner return; 12076fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner } 12086fbe3ebeaef08665a37423f8425314c90b8b5bcfChris Lattner 1209141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Look up the file, create a File ID for it. 12102b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = SourceMgr.createFileID(File, FilenameTok.getLocation(), 12112b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileCharacter); 1212d57b7ff9bebc4c45f325fc1be6f238cfcd4c3732Peter Collingbourne assert(!FID.isInvalid() && "Expected valid file ID"); 1213141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1214141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if all is good, enter the new file! 1215e127a0d80155b45dafe77f2b4380e5fa111a3345Chris Lattner EnterSourceFile(FID, CurDir, FilenameTok.getLocation()); 1216141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1217141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1218141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIncludeNextDirective - Implements #include_next. 1219141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1220ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleIncludeNextDirective(SourceLocation HashLoc, 1221ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &IncludeNextTok) { 1222141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::ext_pp_include_next_directive); 12231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1224141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #include_next is like #include, except that we start searching after 1225141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the current found directory. If we can't do this, issue a 1226141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // diagnostic. 1227141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *Lookup = CurDirLookup; 1228141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (isInPrimaryFile()) { 1229141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Lookup = 0; 1230141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::pp_include_next_in_primary); 1231141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (Lookup == 0) { 1232141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::pp_include_next_absolute_path); 1233141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 1234141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Start looking up in the next directory. 1235141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++Lookup; 1236141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 12371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1238ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeDirective(HashLoc, IncludeNextTok, Lookup); 1239141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1240141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1241141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleImportDirective - Implements #import. 1242141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1243ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleImportDirective(SourceLocation HashLoc, 1244ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &ImportTok) { 1245b627c8d683c4d3facd774c432b1fdc2d35819369Chris Lattner if (!Features.ObjC1) // #import is standard for ObjC. 1246b627c8d683c4d3facd774c432b1fdc2d35819369Chris Lattner Diag(ImportTok, diag::ext_pp_import_directive); 12471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1248ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor return HandleIncludeDirective(HashLoc, ImportTok, 0, true); 1249141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1250141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1251de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// HandleIncludeMacrosDirective - The -imacros command line option turns into a 1252de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// pseudo directive in the predefines buffer. This handles it by sucking all 1253de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// tokens through the preprocessor and discarding them (only keeping the side 1254de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner/// effects on the preprocessor). 1255ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregorvoid Preprocessor::HandleIncludeMacrosDirective(SourceLocation HashLoc, 1256ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor Token &IncludeMacrosTok) { 1257de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner // This directive should only occur in the predefines buffer. If not, emit an 1258de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner // error and reject it. 1259de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner SourceLocation Loc = IncludeMacrosTok.getLocation(); 1260de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner if (strcmp(SourceMgr.getBufferName(Loc), "<built-in>") != 0) { 1261de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner Diag(IncludeMacrosTok.getLocation(), 1262de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner diag::pp_include_macros_out_of_predefines); 1263de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner DiscardUntilEndOfDirective(); 1264de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner return; 1265de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner } 12661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1267fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner // Treat this as a normal #include for checking purposes. If this is 1268fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner // successful, it will push a new lexer onto the include stack. 1269ecdcb883cbc6bb4a2445dc6f02d58d9bdb54a0edDouglas Gregor HandleIncludeDirective(HashLoc, IncludeMacrosTok, 0, false); 12701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1271fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner Token TmpTok; 1272fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner do { 1273fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner Lex(TmpTok); 1274fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner assert(TmpTok.isNot(tok::eof) && "Didn't find end of -imacros!"); 1275fd10511b3e686c5b045f8324b0632f3624d9ef05Chris Lattner } while (TmpTok.isNot(tok::hashhash)); 1276de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner} 1277de076650fa79a02743b5fe57a72f991ba24779f9Chris Lattner 1278141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1279141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Macro Directive Handling. 1280141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1281141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1282141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ReadMacroDefinitionArgList - The ( starting an argument list of a macro 1283141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// definition has just been read. Lex the rest of the arguments and the 1284141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// closing ), updating MI with what we learn. Return true if an error occurs 1285141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// parsing the arg list. 1286141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerbool Preprocessor::ReadMacroDefinitionArgList(MacroInfo *MI) { 12875f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<IdentifierInfo*, 32> Arguments; 12881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1289141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 1290141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (1) { 1291141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1292141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Tok.getKind()) { 1293141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::r_paren: 1294141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Found the end of the argument list. 1295cf29e0716bb3ecbbc15b74cd648367d6b075fdf0Chris Lattner if (Arguments.empty()) // #define FOO() 1296141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 1297141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Otherwise we have #define FOO(A,) 1298141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_expected_ident_in_arg_list); 1299141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1300141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::ellipsis: // #define X(... -> C99 varargs 130170c7b10c64beed3e08da004c10ed5170c00df8f9Eli Friedman if (!Features.C99 && !Features.CPlusPlus0x) 130270c7b10c64beed3e08da004c10ed5170c00df8f9Eli Friedman Diag(Tok, diag::ext_variadic_macro); 1303141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1304141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 1305141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1306141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::r_paren)) { 1307141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 1308141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1309141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1310141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Add the __VA_ARGS__ identifier as an argument. 1311141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.push_back(Ident__VA_ARGS__); 1312141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsC99Varargs(); 1313685befeb5f6472585bae473a6389e47cab9eac67Chris Lattner MI->setArgumentList(&Arguments[0], Arguments.size(), BP); 1314141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 131584021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne case tok::eod: // #define X( 1316141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 1317141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1318141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 1319141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Handle keywords and identifiers here to accept things like 1320141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define Foo(for) for. 1321141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = Tok.getIdentifierInfo(); 1322141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) { 1323141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define X(1 1324141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_invalid_tok_in_arg_list); 1325141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1326141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1327141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1328141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is already used as an argument, it is used multiple times (e.g. 1329141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define X(A,A. 13301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (std::find(Arguments.begin(), Arguments.end(), II) != 1331141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.end()) { // C99 6.10.3p6 13326cf3ed7be70a7a9c269a65e3316884f41c7373d4Chris Lattner Diag(Tok, diag::err_pp_duplicate_name_in_arg_list) << II; 1333141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1334141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 13351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1336141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Add the argument to the macro info. 1337141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.push_back(II); 13381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1339141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 1340141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 13411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1342141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Tok.getKind()) { 1343141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: // #define X(A B 1344141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_expected_comma_in_arg_list); 1345141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1346141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::r_paren: // #define X(A) 1347685befeb5f6472585bae473a6389e47cab9eac67Chris Lattner MI->setArgumentList(&Arguments[0], Arguments.size(), BP); 1348141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 1349141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::comma: // #define X(A, 1350141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 1351141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::ellipsis: // #define X(A... -> GCC extension 1352141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Diagnose extension. 1353141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::ext_named_variadic_macro); 13541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1355141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 1356141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1357141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::r_paren)) { 1358141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 1359141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 1360141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 13611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1362141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsGNUVarargs(); 1363685befeb5f6472585bae473a6389e47cab9eac67Chris Lattner MI->setArgumentList(&Arguments[0], Arguments.size(), BP); 1364141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 1365141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1366141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1367141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1368141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1369141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1370141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleDefineDirective - Implements #define. This consumes the entire macro 1371141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// line then lets the caller lex the next real token. 1372141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleDefineDirective(Token &DefineTok) { 1373141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumDefined; 1374141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1375141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 1376141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok, 1); 13771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1378141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 137984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) 1380141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1381141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 13822451b528fe114595d0f10ef2c05047928558ab0fChris Lattner Token LastTok = MacroNameTok; 13832451b528fe114595d0f10ef2c05047928558ab0fChris Lattner 1384141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we are supposed to keep comments in #defines, reenable comment saving 1385141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // mode. 1386ac6b06df32e907cac388a92310650b5895c11241Ted Kremenek if (CurLexer) CurLexer->SetCommentRetentionState(KeepMacroComments); 13871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1388141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Create the new macro. 13890ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek MacroInfo *MI = AllocateMacroInfo(MacroNameTok.getLocation()); 13901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1391141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 1392141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 13931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1394141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a function-like macro definition, parse the argument list, 1395141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // marking each of the identifiers as being used as macro arguments. Also, 1396141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // check other constraints on the first token of the macro body. 139784021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (Tok.is(tok::eod)) { 1398141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If there is no body to this macro, we have no special handling here. 13996272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } else if (Tok.hasLeadingSpace()) { 14006272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // This is a normal token with leading space. Clear the leading space 14016272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // marker on the first token to get proper expansion. 14026272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Tok.clearFlag(Token::LeadingSpace); 14036272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } else if (Tok.is(tok::l_paren)) { 1404141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // This is a function-like macro definition. Read the argument list. 1405141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsFunctionLike(); 1406141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ReadMacroDefinitionArgList(MI)) { 1407141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Forget about MI. 14080ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1409141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Throw away the rest of the line. 141060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->ParsingPreprocessorDirective) 1411141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 1412141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1413141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1414141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 14158fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // If this is a definition of a variadic C99 function-like macro, not using 14168fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // the GNU named varargs extension, enabled __VA_ARGS__. 14171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14188fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // "Poison" __VA_ARGS__, which can only appear in the expansion of a macro. 14198fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner // This gets unpoisoned where it is allowed. 14208fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner assert(Ident__VA_ARGS__->isPoisoned() && "__VA_ARGS__ should be poisoned!"); 14218fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner if (MI->isC99Varargs()) 14228fde5978a63bcce5c294a93b2a5dd424d7628971Chris Lattner Ident__VA_ARGS__->setIsPoisoned(false); 14231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1424141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the first token after the arg list for down below. 1425141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 14266272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } else if (Features.C99) { 1427141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 requires whitespace between the macro definition and the body. Emit 1428141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // a diagnostic for something like "#define X+". 14296272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Diag(Tok, diag::ext_c99_whitespace_required_after_macro_name); 1430141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 14316272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // C90 6.8 TC1 says: "In the definition of an object-like macro, if the 14326272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // first character of a replacement list is not a character required by 14336272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // subclause 5.2.1, then there shall be white-space separation between the 14346272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // identifier and the replacement list.". 5.2.1 lists this set: 14356272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // "A-Za-z0-9!"#%&'()*+,_./:;<=>?[\]^_{|}~" as well as whitespace, which 14366272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // is irrelevant here. 14376272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner bool isInvalid = false; 14386272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner if (Tok.is(tok::at)) // @ is not in the list above. 14396272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner isInvalid = true; 14406272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner else if (Tok.is(tok::unknown)) { 14416272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // If we have an unknown token, it is something strange like "`". Since 14426272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // all of valid characters would have lexed into a single character 14436272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner // token of some sort, we know this is not a valid case. 14446272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner isInvalid = true; 14456272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner } 14466272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner if (isInvalid) 14476272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Diag(Tok, diag::ext_missing_whitespace_after_macro_name); 14486272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner else 14496272bcfe5dc148d293ccce9db19df9e71c991cdeChris Lattner Diag(Tok, diag::warn_missing_whitespace_after_macro_name); 1450141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 14512451b528fe114595d0f10ef2c05047928558ab0fChris Lattner 145284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (!Tok.is(tok::eod)) 14532451b528fe114595d0f10ef2c05047928558ab0fChris Lattner LastTok = Tok; 14542451b528fe114595d0f10ef2c05047928558ab0fChris Lattner 1455141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the macro body. 1456141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->isObjectLike()) { 1457141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Object-like macros are very simple, just read their body. 145884021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (Tok.isNot(tok::eod)) { 14592451b528fe114595d0f10ef2c05047928558ab0fChris Lattner LastTok = Tok; 1460141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->AddTokenToBody(Tok); 1461141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1462141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1463141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 14641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1465141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 14663240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Otherwise, read the body of a function-like macro. While we are at it, 14673240469102eca90fa5123ec9636fa0364df3034cChris Lattner // check C99 6.10.3.2p1: ensure that # operators are followed by macro 14683240469102eca90fa5123ec9636fa0364df3034cChris Lattner // parameters in function-like macro expansions. 146984021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne while (Tok.isNot(tok::eod)) { 14702451b528fe114595d0f10ef2c05047928558ab0fChris Lattner LastTok = Tok; 1471141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1472141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::hash)) { 14733240469102eca90fa5123ec9636fa0364df3034cChris Lattner MI->AddTokenToBody(Tok); 14741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1475141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1476141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1477141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 1478141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 14791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1480141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1481141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 14821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14833240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Check for a valid macro arg identifier. 14843240469102eca90fa5123ec9636fa0364df3034cChris Lattner if (Tok.getIdentifierInfo() == 0 || 14853240469102eca90fa5123ec9636fa0364df3034cChris Lattner MI->getArgumentNum(Tok.getIdentifierInfo()) == -1) { 14863240469102eca90fa5123ec9636fa0364df3034cChris Lattner 14873240469102eca90fa5123ec9636fa0364df3034cChris Lattner // If this is assembler-with-cpp mode, we accept random gibberish after 14883240469102eca90fa5123ec9636fa0364df3034cChris Lattner // the '#' because '#' is often a comment character. However, change 14893240469102eca90fa5123ec9636fa0364df3034cChris Lattner // the kind of the token to tok::unknown so that the preprocessor isn't 14903240469102eca90fa5123ec9636fa0364df3034cChris Lattner // confused. 149184021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (getLangOptions().AsmPreprocessor && Tok.isNot(tok::eod)) { 14923240469102eca90fa5123ec9636fa0364df3034cChris Lattner LastTok.setKind(tok::unknown); 14933240469102eca90fa5123ec9636fa0364df3034cChris Lattner } else { 14943240469102eca90fa5123ec9636fa0364df3034cChris Lattner Diag(Tok, diag::err_pp_stringize_not_parameter); 14953240469102eca90fa5123ec9636fa0364df3034cChris Lattner ReleaseMacroInfo(MI); 14961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14973240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Disable __VA_ARGS__ again. 14983240469102eca90fa5123ec9636fa0364df3034cChris Lattner Ident__VA_ARGS__->setIsPoisoned(true); 14993240469102eca90fa5123ec9636fa0364df3034cChris Lattner return; 15003240469102eca90fa5123ec9636fa0364df3034cChris Lattner } 1501141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15033240469102eca90fa5123ec9636fa0364df3034cChris Lattner // Things look ok, add the '#' and param name tokens to the macro. 15043240469102eca90fa5123ec9636fa0364df3034cChris Lattner MI->AddTokenToBody(LastTok); 1505141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->AddTokenToBody(Tok); 15063240469102eca90fa5123ec9636fa0364df3034cChris Lattner LastTok = Tok; 15071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1508141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 1509141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 1510141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1511141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1514141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Disable __VA_ARGS__ again. 1515141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Ident__VA_ARGS__->setIsPoisoned(true); 1516141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1517fc8f0e14ad142ed811e90fbd9a30e419e301c717Chris Lattner // Check that there is no paste (##) operator at the beginning or end of the 1518141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // replacement list. 1519141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned NumTokens = MI->getNumTokens(); 1520141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (NumTokens != 0) { 1521141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->getReplacementToken(0).is(tok::hashhash)) { 1522141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getReplacementToken(0), diag::err_paste_at_start); 15230ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1524141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1525141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1526141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->getReplacementToken(NumTokens-1).is(tok::hashhash)) { 1527141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getReplacementToken(NumTokens-1), diag::err_paste_at_end); 15280ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1529141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1530141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1531141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15332451b528fe114595d0f10ef2c05047928558ab0fChris Lattner MI->setDefinitionEndLoc(LastTok.getLocation()); 15341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1535141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if this identifier already had a macro defined for it, verify that 1536141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the macro bodies are identical and free the old definition. 1537141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MacroInfo *OtherMI = getMacroInfo(MacroNameTok.getIdentifierInfo())) { 153841c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // It is very common for system headers to have tons of macro redefinitions 153941c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // and for warnings to be disabled in system headers. If this is the case, 154041c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // then don't bother calling MacroInfo::isIdenticalTo. 15417f549dfd7b1d3b2b09e5878eeb754efae253d557Chris Lattner if (!getDiagnostics().getSuppressSystemWarnings() || 154241c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner !SourceMgr.isInSystemHeader(DefineTok.getLocation())) { 1543a33e0504f61132ac43f4f89af43b12c87e987c20Argyrios Kyrtzidis if (!OtherMI->isUsed() && OtherMI->isWarnIfUnused()) 154441c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner Diag(OtherMI->getDefinitionLoc(), diag::pp_macro_not_used); 1545141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1546f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner // Macros must be identical. This means all tokens and whitespace 154741c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner // separation must be the same. C99 6.10.3.2. 1548f47724bf78299c7a50f008e0443c5f9f9f279ddcChris Lattner if (!OtherMI->isAllowRedefinitionsWithoutWarning() && 1549a7e6845660f91ec611427e1db842780e1ec12bdbEli Friedman !MI->isIdenticalTo(*OtherMI, *this)) { 155041c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner Diag(MI->getDefinitionLoc(), diag::ext_pp_macro_redef) 155141c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner << MacroNameTok.getIdentifierInfo(); 155241c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner Diag(OtherMI->getDefinitionLoc(), diag::note_previous_definition); 155341c3ae108a54437f27fa99ddcb9bafcf113bde80Chris Lattner } 1554141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1555a33e0504f61132ac43f4f89af43b12c87e987c20Argyrios Kyrtzidis if (OtherMI->isWarnIfUnused()) 1556a33e0504f61132ac43f4f89af43b12c87e987c20Argyrios Kyrtzidis WarnUnusedMacroLocs.erase(OtherMI->getDefinitionLoc()); 15570ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(OtherMI); 1558141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 15591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1560141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner setMacroInfo(MacroNameTok.getIdentifierInfo(), MI); 15611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15620827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis assert(!MI->isUsed()); 15630827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // If we need warning for not using the macro, add its location in the 15640827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis // warn-because-unused-macro set. If it gets used it will be removed from set. 15650827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis if (isInPrimaryFile() && // don't warn for include'd macros. 15660827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis Diags->getDiagnosticLevel(diag::pp_macro_not_used, 15670827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis MI->getDefinitionLoc()) != Diagnostic::Ignored) { 15680827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis MI->setIsWarnIfUnused(true); 15690827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis WarnUnusedMacroLocs.insert(MI->getDefinitionLoc()); 15700827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis } 15710827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis 1572f4a72b07747cd6ae1a9f6974e148ae504c879349Chris Lattner // If the callbacks want to know, tell them about the macro definition. 1573f4a72b07747cd6ae1a9f6974e148ae504c879349Chris Lattner if (Callbacks) 15742aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->MacroDefined(MacroNameTok, MI); 1575141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1576141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1577141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleUndefDirective - Implements #undef. 1578141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1579141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleUndefDirective(Token &UndefTok) { 1580141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumUndefined; 1581141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1582141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 1583141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok, 2); 15841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1585141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 158684021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) 1587141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 15881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1589141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check to see if this is the last token on the #undef line. 159035410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("undef"); 15911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1592141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we finally have a valid identifier to undef. 1593141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MacroInfo *MI = getMacroInfo(MacroNameTok.getIdentifierInfo()); 15941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1595141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the macro is not defined, this is a noop undef, just return. 1596141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI == 0) return; 1597141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 15981f8dcfca6c57606b9f4f96404642c02562289b83Argyrios Kyrtzidis if (!MI->isUsed() && MI->isWarnIfUnused()) 1599141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getDefinitionLoc(), diag::pp_macro_not_used); 160041c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner 160141c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner // If the callbacks want to know, tell them about the macro #undef. 160241c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner if (Callbacks) 16032aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->MacroUndefined(MacroNameTok, MI); 160441c17473e3ece9e60d97c5d9397866b7730cf7eeChris Lattner 16050827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis if (MI->isWarnIfUnused()) 16060827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis WarnUnusedMacroLocs.erase(MI->getDefinitionLoc()); 16070827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis 1608141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Free macro definition. 16090ea76727ae91bca918a8414ed85b530eddcfedebTed Kremenek ReleaseMacroInfo(MI); 1610141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner setMacroInfo(MacroNameTok.getIdentifierInfo(), 0); 1611141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1612141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1613141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1614141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1615141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Conditional Directive Handling. 1616141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 1617141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1618141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIfdefDirective - Implements the #ifdef/#ifndef directive. isIfndef is 1619141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// true when this is a #ifndef directive. ReadAnyTokensBeforeDirective is true 1620141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// if any tokens have been returned or pp-directives activated before this 1621141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #ifndef has been lexed. 1622141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1623141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIfdefDirective(Token &Result, bool isIfndef, 1624141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ReadAnyTokensBeforeDirective) { 1625141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumIf; 1626141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token DirectiveTok = Result; 1627141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1628141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 1629141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok); 16301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1631141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 163284021556baceb76eedf7d44be8ba71d9b8cfaccePeter Collingbourne if (MacroNameTok.is(tok::eod)) { 1633141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Skip code until we get to #endif. This helps with recovery by not 1634141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // emitting an error when the #endif is reached. 1635141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner SkipExcludedConditionalBlock(DirectiveTok.getLocation(), 1636141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*Foundnonskip*/false, /*FoundElse*/false); 1637141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1638141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 16391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1640141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check to see if this is the last token on the #if[n]def line. 164135410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective(isIfndef ? "ifndef" : "ifdef"); 1642141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 164313d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner IdentifierInfo *MII = MacroNameTok.getIdentifierInfo(); 164413d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner MacroInfo *MI = getMacroInfo(MII); 1645193575455e00eca03fd7177f60e3f2e6263cb661Kovarththanan Rajaratnam 164660e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) { 164713d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // If the start of a top-level #ifdef and if the macro is not defined, 164813d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // inform MIOpt that this might be the start of a proper include guard. 164913d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // Otherwise it is some other form of unknown conditional which we can't 165013d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner // handle. 165113d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner if (!ReadAnyTokensBeforeDirective && MI == 0) { 1652141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(isIfndef && "#ifdef shouldn't reach here"); 165313d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner CurPPLexer->MIOpt.EnterTopLevelIFNDEF(MII); 1654141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else 165560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 1656141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1657141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1658141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If there is a macro, process it. 1659141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI) // Mark it used. 16600827408865e32789e0ec4b8113a302ccdc531423Argyrios Kyrtzidis markMacroAsUsed(MI); 16611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1662141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Should we include the stuff contained by this directive? 1663141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!MI == isIfndef) { 1664141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, remember that we are inside a conditional, then lex the next token. 16651d9c54df56391ac4740db27d551782e81189cb51Chris Lattner CurPPLexer->pushConditionalLevel(DirectiveTok.getLocation(), 16661d9c54df56391ac4740db27d551782e81189cb51Chris Lattner /*wasskip*/false, /*foundnonskip*/true, 16671d9c54df56391ac4740db27d551782e81189cb51Chris Lattner /*foundelse*/false); 1668141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 166908985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // No, skip the contents of this block. 1670141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner SkipExcludedConditionalBlock(DirectiveTok.getLocation(), 16711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump /*Foundnonskip*/false, 1672141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*FoundElse*/false); 1673141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 167408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 167508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) { 167608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (isIfndef) 16772aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->Ifndef(MacroNameTok); 167808985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein else 16792aa9267cf193e5eceb9fd24a51b51c031b606fe9Craig Silverstein Callbacks->Ifdef(MacroNameTok); 168008985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein } 1681141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1682141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1683141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIfDirective - Implements the #if directive. 1684141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1685141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIfDirective(Token &IfToken, 1686141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ReadAnyTokensBeforeDirective) { 1687141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumIf; 16881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 168908985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // Parse and evaluate the conditional expression. 1690141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *IfNDefMacro = 0; 169108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalBegin = CurPPLexer->getSourceLocation(); 169208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const bool ConditionalTrue = EvaluateDirectiveExpression(IfNDefMacro); 169308985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalEnd = CurPPLexer->getSourceLocation(); 16940049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes 16950049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes // If this condition is equivalent to #ifndef X, and if this is the first 16960049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes // directive seen, handle it for the multiple-include optimization. 169760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) { 169813d283d6a2f50cc4a2b03357191d49672de0eb9bChris Lattner if (!ReadAnyTokensBeforeDirective && IfNDefMacro && ConditionalTrue) 169960e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelIFNDEF(IfNDefMacro); 17000049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes else 170160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 17020049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes } 17030049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes 1704141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Should we include the stuff contained by this directive? 1705141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ConditionalTrue) { 1706141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, remember that we are inside a conditional, then lex the next token. 170760e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->pushConditionalLevel(IfToken.getLocation(), /*wasskip*/false, 1708141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*foundnonskip*/true, /*foundelse*/false); 1709141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 171008985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // No, skip the contents of this block. 17111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SkipExcludedConditionalBlock(IfToken.getLocation(), /*Foundnonskip*/false, 1712141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*FoundElse*/false); 1713141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 171408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 171508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 171608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->If(SourceRange(ConditionalBegin, ConditionalEnd)); 1717141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1718141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1719141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleEndifDirective - Implements the #endif directive. 1720141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1721141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleEndifDirective(Token &EndifToken) { 1722141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumEndif; 17231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1724141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check that this is the whole directive. 172535410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("endif"); 17261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1727141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CondInfo; 172860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->popConditionalLevel(CondInfo)) { 1729141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // No conditionals on the stack: this is an #endif without an #if. 17303692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(EndifToken, diag::err_pp_endif_without_if); 17313692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 1732141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 17331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1734141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this the end of a top-level #endif, inform MIOpt. 173560e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) 173660e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.ExitTopLevelConditional(); 17371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 173860e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek assert(!CondInfo.WasSkipping && !CurPPLexer->LexingRawMode && 1739141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner "This code should only be reachable in the non-skipping case!"); 1740141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 174108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 174208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->Endif(); 174308985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein} 1744141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 174508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// HandleElseDirective - Implements the #else directive. 174608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// 1747141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleElseDirective(Token &Result) { 1748141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumElse; 17491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1750141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #else directive in a non-skipping conditional... start skipping. 175135410d5cbbb18735d76e00496540d416dc49b577Chris Lattner CheckEndOfDirective("else"); 17521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1753141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CI; 17543692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (CurPPLexer->popConditionalLevel(CI)) { 17553692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(Result, diag::pp_err_else_without_if); 17563692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 17573692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 17581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1759141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a top-level #else, inform the MIOpt. 176060e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) 176160e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 1762141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1763141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #else with a #else before it, report the error. 1764141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CI.FoundElse) Diag(Result, diag::pp_err_else_after_else); 17651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 176608985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // Finally, skip the rest of the contents of this block. 176708985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein SkipExcludedConditionalBlock(CI.IfLoc, /*Foundnonskip*/true, 176808985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein /*FoundElse*/true); 176908985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 177008985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 177108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->Else(); 1772141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1773141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 177408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// HandleElifDirective - Implements the #elif directive. 177508985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein/// 1776141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleElifDirective(Token &ElifToken) { 1777141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumElse; 17781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1779141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #elif directive in a non-skipping conditional... start skipping. 1780141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We don't care what the condition is, because we will always skip it (since 1781141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the block immediately before it was included). 178208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalBegin = CurPPLexer->getSourceLocation(); 1783141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 178408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein const SourceLocation ConditionalEnd = CurPPLexer->getSourceLocation(); 1785141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1786141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CI; 17873692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner if (CurPPLexer->popConditionalLevel(CI)) { 17883692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner Diag(ElifToken, diag::pp_err_elif_without_if); 17893692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner return; 17903692b09faa9fe346f39bc922db6dce48cdcc3f63Chris Lattner } 17911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1792141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a top-level #elif, inform the MIOpt. 179360e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek if (CurPPLexer->getConditionalStackDepth() == 0) 179460e45d4c41479fb58ad14d97efd03418e8549509Ted Kremenek CurPPLexer->MIOpt.EnterTopLevelConditional(); 17951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1796141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #elif with a #else before it, report the error. 1797141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CI.FoundElse) Diag(ElifToken, diag::pp_err_elif_after_else); 1798141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 179908985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein // Finally, skip the rest of the contents of this block. 180008985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein SkipExcludedConditionalBlock(CI.IfLoc, /*Foundnonskip*/true, 180108985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein /*FoundElse*/CI.FoundElse); 180208985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein 180308985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein if (Callbacks) 180408985b91e5a87e7731ba24c675f2dc9f9cb645d4Craig Silverstein Callbacks->Elif(SourceRange(ConditionalBegin, ConditionalEnd)); 1805141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1806