PPDirectives.cpp revision 0049db6ce127cbf4671a6a81ad4dfe61fdc4aa5c
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" 15141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner#include "clang/Lex/HeaderSearch.h" 16141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner#include "clang/Lex/MacroInfo.h" 17141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner#include "clang/Lex/PPCallbacks.h" 18141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner#include "clang/Basic/Diagnostic.h" 19141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner#include "clang/Basic/SourceManager.h" 20141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerusing namespace clang; 21141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 22141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 23141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Utility Methods for Preprocessor Directive Handling. 24141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 25141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 26141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// DiscardUntilEndOfDirective - Read and discard all tokens remaining on the 27141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// current line until the tok::eom token is found. 28141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::DiscardUntilEndOfDirective() { 29141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tmp; 30141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner do { 31141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tmp); 32141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } while (Tmp.isNot(tok::eom)); 33141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 34141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 35141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// isCXXNamedOperator - Returns "true" if the token is a named operator in C++. 36141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerstatic bool isCXXNamedOperator(const std::string &Spelling) { 37141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return Spelling == "and" || Spelling == "bitand" || Spelling == "bitor" || 38141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Spelling == "compl" || Spelling == "not" || Spelling == "not_eq" || 39141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Spelling == "or" || Spelling == "xor"; 40141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 41141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 42141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ReadMacroName - Lex and validate a macro name, which occurs after a 43141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #define or #undef. This sets the token kind to eom and discards the rest 44141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// of the macro line if the macro name is invalid. isDefineUndef is 1 if 45141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// this is due to a a #define, 2 if #undef directive, 0 if it is something 46141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// else (e.g. #ifdef). 47141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::ReadMacroName(Token &MacroNameTok, char isDefineUndef) { 48141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the token, don't allow macro expansion on it. 49141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(MacroNameTok); 50141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 51141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Missing macro name? 52141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MacroNameTok.is(tok::eom)) 53141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return Diag(MacroNameTok, diag::err_pp_missing_macro_name); 54141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 55141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = MacroNameTok.getIdentifierInfo(); 56141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) { 57141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner std::string Spelling = getSpelling(MacroNameTok); 58141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (isCXXNamedOperator(Spelling)) 59141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C++ 2.5p2: Alternative tokens behave the same as its primary token 60141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // except for their spellings. 61141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::err_pp_operator_used_as_macro_name, Spelling); 62141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner else 63141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::err_pp_macro_not_identifier); 64141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Fall through on error. 65141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (isDefineUndef && II->getPPKeywordID() == tok::pp_defined) { 66141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error if defining "defined": C99 6.10.8.4. 67141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::err_defined_macro_name); 68141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (isDefineUndef && II->hasMacroDefinition() && 69141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner getMacroInfo(II)->isBuiltinMacro()) { 70141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error if defining "__LINE__" and other builtins: C99 6.10.8.4. 71141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (isDefineUndef == 1) 72141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::pp_redef_builtin_macro); 73141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner else 74141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MacroNameTok, diag::pp_undef_builtin_macro); 75141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 76141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we got a good identifier node. Return it. 77141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 78141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 79141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 80141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Invalid macro name, read and discard the rest of the line. Then set the 81141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // token kind to tok::eom. 82141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MacroNameTok.setKind(tok::eom); 83141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return DiscardUntilEndOfDirective(); 84141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 85141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 86141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// CheckEndOfDirective - Ensure that the next token is a tok::eom token. If 87141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// not, emit a diagnostic and consume up until the eom. 88141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::CheckEndOfDirective(const char *DirType) { 89141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tmp; 90141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex unexpanded tokens: macros might expand to zero tokens, causing us to 91141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // miss diagnosing invalid lines. 92141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tmp); 93141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 94141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // There should be no tokens after the directive, but we allow them as an 95141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // extension. 96141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (Tmp.is(tok::comment)) // Skip comments in -C mode. 97141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tmp); 98141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 99141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tmp.isNot(tok::eom)) { 100141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tmp, diag::ext_pp_extra_tokens_at_eol, DirType); 101141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 102141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 103141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 104141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 105141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 106141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 107141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// SkipExcludedConditionalBlock - We just read a #if or related directive and 108141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// decided that the subsequent tokens are in the #if'd out portion of the 109141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// file. Lex the rest of the file, until we see an #endif. If 110141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// FoundNonSkipPortion is true, then we have already emitted code for part of 111141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// this #if directive, so #else/#elif blocks should never be entered. If ElseOk 112141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// is true, then #else directives are ok, if not, then we have already seen one 113141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// so a #else directive is a duplicate. When this returns, the caller can lex 114141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// the first valid token. 115141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::SkipExcludedConditionalBlock(SourceLocation IfTokenLoc, 116141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool FoundNonSkipPortion, 117141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool FoundElse) { 118141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumSkipped; 1196cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner assert(CurTokenLexer == 0 && CurLexer && 120141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner "Lexing a macro, not a file?"); 121141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 122141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->pushConditionalLevel(IfTokenLoc, /*isSkipping*/false, 123141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FoundNonSkipPortion, FoundElse); 124141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 125141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Enter raw mode to disable identifier lookup (and thus macro expansion), 126141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // disabling warnings, etc. 127141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->LexingRawMode = true; 128141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 129141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (1) { 130141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->Lex(Tok); 131141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 132141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is the end of the buffer, we have an error. 133141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.is(tok::eof)) { 134141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Emit errors for each unterminated conditional on the stack, including 135141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the current one. 136141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (!CurLexer->ConditionalStack.empty()) { 137141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(CurLexer->ConditionalStack.back().IfLoc, 138141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner diag::err_pp_unterminated_conditional); 139141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->ConditionalStack.pop_back(); 140141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 141141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 142141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Just return and let the caller lex after this #include. 143141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 144141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 145141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 146141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this token is not a preprocessor directive, just skip it. 147141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::hash) || !Tok.isAtStartOfLine()) 148141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 149141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 150141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We just parsed a # character at the start of a line, so we're in 151141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // directive mode. Tell the lexer this so any newlines we see will be 152141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // converted into an EOM token (this terminates the macro). 153141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->ParsingPreprocessorDirective = true; 154141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->KeepCommentMode = false; 155141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 156141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 157141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the next token, the directive flavor. 158141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 159141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 160141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this isn't an identifier directive (e.g. is "# 1\n" or "#\n", or 161141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // something bogus), skip it. 162141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::identifier)) { 163141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->ParsingPreprocessorDirective = false; 164141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 165141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->KeepCommentMode = KeepComments; 166141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 167141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 168141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 169141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the first letter isn't i or e, it isn't intesting to us. We know that 170141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // this is safe in the face of spelling differences, because there is no way 171141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // to spell an i/e in a strange way that is another letter. Skipping this 172141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // allows us to avoid looking up the identifier info for #define/#undef and 173141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // other common directives. 174141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const char *RawCharData = SourceMgr.getCharacterData(Tok.getLocation()); 175141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner char FirstChar = RawCharData[0]; 176141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (FirstChar >= 'a' && FirstChar <= 'z' && 177141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FirstChar != 'i' && FirstChar != 'e') { 178141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->ParsingPreprocessorDirective = false; 179141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 180141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->KeepCommentMode = KeepComments; 181141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 182141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 183141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 184141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the identifier name without trigraphs or embedded newlines. Note 185141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // that we can't use Tok.getIdentifierInfo() because its lookup is disabled 186141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // when skipping. 187141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // TODO: could do this with zero copies in the no-clean case by using 188141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // strncmp below. 189141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner char Directive[20]; 190141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned IdLen; 191141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!Tok.needsCleaning() && Tok.getLength() < 20) { 192141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdLen = Tok.getLength(); 193141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner memcpy(Directive, RawCharData, IdLen); 194141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Directive[IdLen] = 0; 195141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 196141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner std::string DirectiveStr = getSpelling(Tok); 197141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdLen = DirectiveStr.size(); 198141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (IdLen >= 20) { 199141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->ParsingPreprocessorDirective = false; 200141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 201141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->KeepCommentMode = KeepComments; 202141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 203141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 204141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner memcpy(Directive, &DirectiveStr[0], IdLen); 205141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Directive[IdLen] = 0; 206141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 207141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 208141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (FirstChar == 'i' && Directive[1] == 'f') { 209141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if ((IdLen == 2) || // "if" 210141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner (IdLen == 5 && !strcmp(Directive+2, "def")) || // "ifdef" 211141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner (IdLen == 6 && !strcmp(Directive+2, "ndef"))) { // "ifndef" 212141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We know the entire #if/#ifdef/#ifndef block will be skipped, don't 213141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // bother parsing the condition. 214141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 215141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->pushConditionalLevel(Tok.getLocation(), /*wasskipping*/true, 216141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*foundnonskip*/false, 217141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*fnddelse*/false); 218141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 219141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (FirstChar == 'e') { 220141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (IdLen == 5 && !strcmp(Directive+1, "ndif")) { // "endif" 221141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CheckEndOfDirective("#endif"); 222141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CondInfo; 223141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.WasSkipping = true; // Silence bogus warning. 224141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool InCond = CurLexer->popConditionalLevel(CondInfo); 225141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner InCond = InCond; // Silence warning in no-asserts mode. 226141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(!InCond && "Can't be skipping if not in a conditional!"); 227141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 228141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we popped the outermost skipping block, we're done skipping! 229141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!CondInfo.WasSkipping) 230141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 231141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (IdLen == 4 && !strcmp(Directive+1, "lse")) { // "else". 232141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #else directive in a skipping conditional. If not in some other 233141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // skipping conditional, and if #else hasn't already been seen, enter it 234141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // as a non-skipping conditional. 235141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CheckEndOfDirective("#else"); 236141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo &CondInfo = CurLexer->peekConditionalLevel(); 237141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 238141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #else with a #else before it, report the error. 239141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.FoundElse) Diag(Tok, diag::pp_err_else_after_else); 240141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 241141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Note that we've seen a #else in this conditional. 242141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundElse = true; 243141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 244141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the conditional is at the top level, and the #if block wasn't 245141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // entered, enter the #else block now. 246141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!CondInfo.WasSkipping && !CondInfo.FoundNonSkip) { 247141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundNonSkip = true; 248141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 249141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 250141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (IdLen == 4 && !strcmp(Directive+1, "lif")) { // "elif". 251141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo &CondInfo = CurLexer->peekConditionalLevel(); 252141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 253141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ShouldEnter; 254141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is in a skipping block or if we're already handled this #if 255141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // block, don't bother parsing the condition. 256141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.WasSkipping || CondInfo.FoundNonSkip) { 257141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 258141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ShouldEnter = false; 259141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 260141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore the value of LexingRawMode so that identifiers are 261141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // looked up, etc, inside the #elif expression. 262141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(CurLexer->LexingRawMode && "We have to be skipping here!"); 263141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->LexingRawMode = false; 264141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *IfNDefMacro = 0; 265141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ShouldEnter = EvaluateDirectiveExpression(IfNDefMacro); 266141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->LexingRawMode = true; 267141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 268141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 269141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #elif with a #else before it, report the error. 270141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CondInfo.FoundElse) Diag(Tok, diag::pp_err_elif_after_else); 271141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 272141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this condition is true, enter it! 273141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ShouldEnter) { 274141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CondInfo.FoundNonSkip = true; 275141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 276141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 277141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 278141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 279141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 280141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->ParsingPreprocessorDirective = false; 281141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Restore comment saving mode. 282141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->KeepCommentMode = KeepComments; 283141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 284141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 285141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if we are out of the conditional (saw an #endif or ran off the end 286141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // of the file, just stop skipping and return to lexing whatever came after 287141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the #if block. 288141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->LexingRawMode = false; 289141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 290141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 2911072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// LookupFile - Given a "foo" or <foo> reference, look up the indicated file, 2921072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// return null on failure. isAngled indicates whether the file reference is 2931072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner/// for system #include's or not (i.e. using <> instead of ""). 2941072509e126e70c85652ab0056bcabd72edff7e5Chris Lattnerconst FileEntry *Preprocessor::LookupFile(const char *FilenameStart, 2951072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner const char *FilenameEnd, 2961072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner bool isAngled, 2971072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner const DirectoryLookup *FromDir, 2981072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner const DirectoryLookup *&CurDir) { 2991072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // If the header lookup mechanism may be relative to the current file, pass in 3001072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // info about where the current file is. 3011072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner const FileEntry *CurFileEnt = 0; 3021072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if (!FromDir) { 3031072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner SourceLocation FileLoc = getCurrentFileLexer()->getFileLoc(); 3041072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner CurFileEnt = SourceMgr.getFileEntryForLoc(FileLoc); 3051072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 3061072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner 3071072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Do a standard file entry lookup. 3081072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner CurDir = CurDirLookup; 3091072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner const FileEntry *FE = 3101072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner HeaderInfo.LookupFile(FilenameStart, FilenameEnd, 3111072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner isAngled, FromDir, CurDir, CurFileEnt); 3121072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if (FE) return FE; 3131072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner 3141072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Otherwise, see if this is a subframework header. If so, this is relative 3151072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // to one of the headers on the #include stack. Walk the list of the current 3161072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // headers on the #include stack and pass them to HeaderInfo. 3171072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if (CurLexer && !CurLexer->Is_PragmaLexer) { 3181072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if ((CurFileEnt = SourceMgr.getFileEntryForLoc(CurLexer->getFileLoc()))) 3191072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if ((FE = HeaderInfo.LookupSubframeworkHeader(FilenameStart, FilenameEnd, 3201072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner CurFileEnt))) 3211072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return FE; 3221072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 3231072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner 3241072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner for (unsigned i = 0, e = IncludeMacroStack.size(); i != e; ++i) { 3251072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner IncludeStackInfo &ISEntry = IncludeMacroStack[e-i-1]; 3261072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if (ISEntry.TheLexer && !ISEntry.TheLexer->Is_PragmaLexer) { 3271072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if ((CurFileEnt = 3281072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner SourceMgr.getFileEntryForLoc(ISEntry.TheLexer->getFileLoc()))) 3291072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner if ((FE = HeaderInfo.LookupSubframeworkHeader(FilenameStart, 3301072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner FilenameEnd, CurFileEnt))) 3311072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return FE; 3321072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 3331072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner } 3341072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner 3351072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner // Otherwise, we really couldn't find the file. 3361072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner return 0; 3371072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner} 3381072509e126e70c85652ab0056bcabd72edff7e5Chris Lattner 339141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 340141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 341141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Directive Handling. 342141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 343141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 344141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleDirective - This callback is invoked when the lexer sees a # token 345141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// at the start of a line. This consumes the directive, modifies the 346141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// lexer/preprocessor state, and advances the lexer(s) so that the next token 347141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// read is the correct one. 348141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleDirective(Token &Result) { 349141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // FIXME: Traditional: # with whitespace before it not recognized by K&R? 350141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 351141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We just parsed a # character at the start of a line, so we're in directive 352141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // mode. Tell the lexer this so any newlines we see will be converted into an 353141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // EOM token (which terminates the directive). 354141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->ParsingPreprocessorDirective = true; 355141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 356141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumDirectives; 357141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 358141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We are about to read a token. For the multiple-include optimization FA to 359141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // work, we have to remember if we had read any tokens *before* this 360141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // pp-directive. 361141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ReadAnyTokensBeforeDirective = CurLexer->MIOpt.getHasReadAnyTokensVal(); 362141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 363141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the next token, the directive flavor. This isn't expanded due to 364141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3p8. 365141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Result); 366141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 367141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3p11: Is this preprocessor directive in macro invocation? e.g.: 368141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define A(x) #x 369141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // A(abc 370141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #warning blah 371141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // def) 372141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If so, the user is relying on non-portable behavior, emit a diagnostic. 373141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (InMacroArgs) 374141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::ext_embedded_directive); 375141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 376141e71fec621f65ab401dbe66609f7d3c033c6a5Chris LattnerTryAgain: 377141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Result.getKind()) { 378141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::eom: 379141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; // null directive. 380141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::comment: 381141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Handle stuff like "# /*foo*/ define X" in -E -C mode. 382141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Result); 383141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner goto TryAgain; 384141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 385141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::numeric_constant: 386141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // FIXME: implement # 7 line numbers! 387141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 388141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 389141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 390141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = Result.getIdentifierInfo(); 391141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) break; // Not an identifier. 392141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 393141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Ask what the preprocessor keyword ID is. 394141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (II->getPPKeywordID()) { 395141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: break; 396141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.1 - Conditional Inclusion. 397141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_if: 398141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfDirective(Result, ReadAnyTokensBeforeDirective); 399141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ifdef: 400141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfdefDirective(Result, false, true/*not valid for miopt*/); 401141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ifndef: 402141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIfdefDirective(Result, true, ReadAnyTokensBeforeDirective); 403141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_elif: 404141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleElifDirective(Result); 405141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_else: 406141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleElseDirective(Result); 407141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_endif: 408141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleEndifDirective(Result); 409141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 410141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.2 - Source File Inclusion. 411141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_include: 412141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIncludeDirective(Result); // Handle #include. 413141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 414141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.3 - Macro Replacement. 415141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_define: 416141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleDefineDirective(Result); 417141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_undef: 418141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUndefDirective(Result); 419141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 420141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.4 - Line Control. 421141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_line: 422141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // FIXME: implement #line 423141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 424141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 425141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 426141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.5 - Error Directive. 427141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_error: 428141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUserDiagnosticDirective(Result, false); 429141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 430141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 6.10.6 - Pragma Directive. 431141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_pragma: 432141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandlePragmaDirective(); 433141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 434141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // GNU Extensions. 435141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_import: 436141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleImportDirective(Result); 437141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_include_next: 438141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIncludeNextDirective(Result); 439141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 440141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_warning: 441141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::ext_pp_warning_directive); 442141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleUserDiagnosticDirective(Result, true); 443141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_ident: 444141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIdentSCCSDirective(Result); 445141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_sccs: 446141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIdentSCCSDirective(Result); 447141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_assert: 448141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner //isExtension = true; // FIXME: implement #assert 449141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 450141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::pp_unassert: 451141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner //isExtension = true; // FIXME: implement #unassert 452141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 453141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 454141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 455141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 456141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 457141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we reached here, the preprocessing token is not valid! 458141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Result, diag::err_pp_invalid_directive); 459141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 460141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the PP line. 461141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 462141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 463141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we're done parsing the directive. 464141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 465141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 466141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleUserDiagnosticDirective(Token &Tok, 467141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isWarning) { 468141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the line raw. We do this because we don't want macros 469141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // to be expanded and we don't require that the tokens be valid preprocessing 470141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // tokens. For example, this is allowed: "#warning ` 'foo". GCC does 471141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // collapse multiple consequtive white space between tokens, but this isn't 472141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // specified by the standard. 473141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner std::string Message = CurLexer->ReadToEndOfLine(); 474141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 475141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned DiagID = isWarning ? diag::pp_hash_warning : diag::err_pp_hash_error; 476141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return Diag(Tok, DiagID, Message); 477141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 478141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 479141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIdentSCCSDirective - Handle a #ident/#sccs directive. 480141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 481141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIdentSCCSDirective(Token &Tok) { 482141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, this directive is an extension. 483141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::ext_pp_ident_directive); 484141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 485141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the string argument. 486141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token StrTok; 487141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Lex(StrTok); 488141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 489141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the token kind isn't a string, it's a malformed directive. 490141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (StrTok.isNot(tok::string_literal) && 491141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner StrTok.isNot(tok::wide_string_literal)) 492141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return Diag(StrTok, diag::err_pp_malformed_ident); 493141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 494141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Verify that there is nothing after the string, other than EOM. 495141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CheckEndOfDirective("#ident"); 496141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 497141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Callbacks) 498141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Callbacks->Ident(Tok.getLocation(), getSpelling(StrTok)); 499141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 500141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 501141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 502141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Include Directive Handling. 503141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 504141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 505141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// GetIncludeFilenameSpelling - Turn the specified lexer token into a fully 506141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// checked and spelled filename, e.g. as an operand of #include. This returns 507141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// true if the input filename was in <>'s or false if it were in ""'s. The 508141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// caller is expected to provide a buffer that is large enough to hold the 509141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// spelling of the filename, but is also expected to handle the case when 510141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// this method decides to use a different buffer. 511141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerbool Preprocessor::GetIncludeFilenameSpelling(SourceLocation Loc, 512141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const char *&BufStart, 513141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const char *&BufEnd) { 514141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the text form of the filename. 515141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(BufStart != BufEnd && "Can't have tokens with empty spellings!"); 516141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 517141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Make sure the filename is <x> or "x". 518141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isAngled; 519141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (BufStart[0] == '<') { 520141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (BufEnd[-1] != '>') { 521141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 522141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner BufStart = 0; 523141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 524141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 525141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner isAngled = true; 526141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (BufStart[0] == '"') { 527141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (BufEnd[-1] != '"') { 528141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 529141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner BufStart = 0; 530141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 531141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 532141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner isAngled = false; 533141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 534141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_expects_filename); 535141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner BufStart = 0; 536141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 537141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 538141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 539141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Diagnose #include "" as invalid. 540141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (BufEnd-BufStart <= 2) { 541141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Loc, diag::err_pp_empty_filename); 542141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner BufStart = 0; 543141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return ""; 544141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 545141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 546141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Skip the brackets. 547141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++BufStart; 548141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner --BufEnd; 549141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return isAngled; 550141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 551141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 552141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ConcatenateIncludeName - Handle cases where the #include name is expanded 553141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// from a macro as multiple tokens, which need to be glued together. This 554141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// occurs for code like: 555141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #define FOO <a/b.h> 556141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #include FOO 557141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// because in this case, "<a/b.h>" is returned as 7 tokens, not one. 558141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 559141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// This code concatenates and consumes tokens up to the '>' token. It returns 560141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// false if the > was found, otherwise it returns true if it finds and consumes 561141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// the EOM marker. 562141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerstatic bool ConcatenateIncludeName(llvm::SmallVector<char, 128> &FilenameBuffer, 563141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Preprocessor &PP) { 564141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token CurTok; 565141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 566141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PP.Lex(CurTok); 567141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (CurTok.isNot(tok::eom)) { 568141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Append the spelling of this token to the buffer. If there was a space 569141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // before it, add it now. 570141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.hasLeadingSpace()) 571141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.push_back(' '); 572141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 573141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the spelling of the token, directly into FilenameBuffer if possible. 574141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned PreAppendSize = FilenameBuffer.size(); 575141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.resize(PreAppendSize+CurTok.getLength()); 576141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 577141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const char *BufPtr = &FilenameBuffer[PreAppendSize]; 578141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned ActualLen = PP.getSpelling(CurTok, BufPtr); 579141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 580141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the token was spelled somewhere else, copy it into FilenameBuffer. 581141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (BufPtr != &FilenameBuffer[PreAppendSize]) 582141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner memcpy(&FilenameBuffer[PreAppendSize], BufPtr, ActualLen); 583141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 584141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Resize FilenameBuffer to the correct size. 585141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.getLength() != ActualLen) 586141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.resize(PreAppendSize+ActualLen); 587141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 588141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we found the '>' marker, return success. 589141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurTok.is(tok::greater)) 590141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 591141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 592141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PP.Lex(CurTok); 593141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 594141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 595141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we hit the eom marker, emit an error and return true so that the caller 596141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // knows the EOM has been read. 597141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PP.Diag(CurTok.getLocation(), diag::err_pp_expects_filename); 598141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 599141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 600141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 601141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIncludeDirective - The "#include" tokens have just been read, read the 602141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// file to be included from the lexer, then include it! This is a common 603141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// routine with functionality shared between #include, #include_next and 604141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #import. 605141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIncludeDirective(Token &IncludeTok, 606141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *LookupFrom, 607141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isImport) { 608141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 609141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token FilenameTok; 610141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->LexIncludeFilename(FilenameTok); 611141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 612141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Reserve a buffer to get the spelling. 613141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner llvm::SmallVector<char, 128> FilenameBuffer; 614141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const char *FilenameStart, *FilenameEnd; 615141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 616141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (FilenameTok.getKind()) { 617141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::eom: 618141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the token kind is EOM, the error has already been diagnosed. 619141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 620141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 621141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::angle_string_literal: 622141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::string_literal: { 623141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.resize(FilenameTok.getLength()); 624141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameStart = &FilenameBuffer[0]; 625141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned Len = getSpelling(FilenameTok, FilenameStart); 626141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameEnd = FilenameStart+Len; 627141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 628141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 629141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 630141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::less: 631141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // This could be a <foo/bar.h> file coming from a macro expansion. In this 632141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // case, glue the tokens together into FilenameBuffer and interpret those. 633141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameBuffer.push_back('<'); 634141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ConcatenateIncludeName(FilenameBuffer, *this)) 635141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; // Found <eom> but no ">"? Diagnostic already emitted. 636141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameStart = &FilenameBuffer[0]; 637141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameEnd = &FilenameBuffer[FilenameBuffer.size()]; 638141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 639141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 640141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(FilenameTok.getLocation(), diag::err_pp_expects_filename); 641141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 642141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 643141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 644141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 645141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool isAngled = GetIncludeFilenameSpelling(FilenameTok.getLocation(), 646141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner FilenameStart, FilenameEnd); 647141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If GetIncludeFilenameSpelling set the start ptr to null, there was an 648141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // error. 649141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (FilenameStart == 0) { 650141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 651141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 652141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 653141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 654141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Verify that there is nothing after the filename, other than EOM. Use the 655141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // preprocessor to lex this in case lexing the filename entered a macro. 656141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CheckEndOfDirective("#include"); 657141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 658141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check that we don't have infinite #include recursion. 659141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (IncludeMacroStack.size() == MaxAllowedIncludeStackDepth-1) 660141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return Diag(FilenameTok, diag::err_pp_include_too_deep); 661141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 662141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Search include directories. 663141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *CurDir; 664141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const FileEntry *File = LookupFile(FilenameStart, FilenameEnd, 665141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner isAngled, LookupFrom, CurDir); 666141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (File == 0) 667141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return Diag(FilenameTok, diag::err_pp_file_not_found, 668141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner std::string(FilenameStart, FilenameEnd)); 669141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 670141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Ask HeaderInfo if we should enter this #include file. 671141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!HeaderInfo.ShouldEnterIncludeFile(File, isImport)) { 672141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If it returns true, #including this file will have no effect. 673141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 674141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 675141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 676141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Look up the file, create a File ID for it. 677141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned FileID = SourceMgr.createFileID(File, FilenameTok.getLocation()); 678141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (FileID == 0) 679141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return Diag(FilenameTok, diag::err_pp_file_not_found, 680141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner std::string(FilenameStart, FilenameEnd)); 681141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 682141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if all is good, enter the new file! 683141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner EnterSourceFile(FileID, CurDir); 684141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 685141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 686141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIncludeNextDirective - Implements #include_next. 687141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 688141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIncludeNextDirective(Token &IncludeNextTok) { 689141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::ext_pp_include_next_directive); 690141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 691141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #include_next is like #include, except that we start searching after 692141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the current found directory. If we can't do this, issue a 693141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // diagnostic. 694141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner const DirectoryLookup *Lookup = CurDirLookup; 695141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (isInPrimaryFile()) { 696141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Lookup = 0; 697141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::pp_include_next_in_primary); 698141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (Lookup == 0) { 699141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(IncludeNextTok, diag::pp_include_next_absolute_path); 700141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 701141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Start looking up in the next directory. 702141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++Lookup; 703141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 704141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 705141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIncludeDirective(IncludeNextTok, Lookup); 706141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 707141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 708141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleImportDirective - Implements #import. 709141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 710141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleImportDirective(Token &ImportTok) { 711141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(ImportTok, diag::ext_pp_import_directive); 712141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 713141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return HandleIncludeDirective(ImportTok, 0, true); 714141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 715141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 716141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 717141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Macro Directive Handling. 718141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 719141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 720141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// ReadMacroDefinitionArgList - The ( starting an argument list of a macro 721141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// definition has just been read. Lex the rest of the arguments and the 722141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// closing ), updating MI with what we learn. Return true if an error occurs 723141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// parsing the arg list. 724141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnerbool Preprocessor::ReadMacroDefinitionArgList(MacroInfo *MI) { 725141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner llvm::SmallVector<IdentifierInfo*, 32> Arguments; 726141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 727141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 728141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (1) { 729141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 730141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Tok.getKind()) { 731141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::r_paren: 732141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Found the end of the argument list. 733141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Arguments.empty()) { // #define FOO() 734141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setArgumentList(Arguments.begin(), Arguments.end()); 735141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 736141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 737141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Otherwise we have #define FOO(A,) 738141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_expected_ident_in_arg_list); 739141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 740141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::ellipsis: // #define X(... -> C99 varargs 741141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Warn if use of C99 feature in non-C99 mode. 742141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!Features.C99) Diag(Tok, diag::ext_variadic_macro); 743141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 744141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 745141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 746141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::r_paren)) { 747141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 748141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 749141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 750141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Add the __VA_ARGS__ identifier as an argument. 751141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.push_back(Ident__VA_ARGS__); 752141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsC99Varargs(); 753141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setArgumentList(Arguments.begin(), Arguments.end()); 754141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 755141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::eom: // #define X( 756141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 757141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 758141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: 759141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Handle keywords and identifiers here to accept things like 760141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define Foo(for) for. 761141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *II = Tok.getIdentifierInfo(); 762141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (II == 0) { 763141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define X(1 764141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_invalid_tok_in_arg_list); 765141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 766141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 767141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 768141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is already used as an argument, it is used multiple times (e.g. 769141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #define X(A,A. 770141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (std::find(Arguments.begin(), Arguments.end(), II) != 771141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.end()) { // C99 6.10.3p6 772141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_duplicate_name_in_arg_list, II->getName()); 773141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 774141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 775141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 776141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Add the argument to the macro info. 777141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Arguments.push_back(II); 778141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 779141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 780141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 781141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 782141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner switch (Tok.getKind()) { 783141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner default: // #define X(A B 784141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_expected_comma_in_arg_list); 785141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 786141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::r_paren: // #define X(A) 787141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setArgumentList(Arguments.begin(), Arguments.end()); 788141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 789141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::comma: // #define X(A, 790141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner break; 791141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner case tok::ellipsis: // #define X(A... -> GCC extension 792141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Diagnose extension. 793141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::ext_named_variadic_macro); 794141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 795141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Lex the token after the identifier. 796141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 797141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::r_paren)) { 798141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_missing_rparen_in_macro_def); 799141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return true; 800141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 801141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 802141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsGNUVarargs(); 803141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setArgumentList(Arguments.begin(), Arguments.end()); 804141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return false; 805141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 806141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 807141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 808141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 809141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 810141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleDefineDirective - Implements #define. This consumes the entire macro 811141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// line then lets the caller lex the next real token. 812141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleDefineDirective(Token &DefineTok) { 813141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumDefined; 814141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 815141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 816141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok, 1); 817141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 818141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 819141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MacroNameTok.is(tok::eom)) 820141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 821141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 822141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If we are supposed to keep comments in #defines, reenable comment saving 823141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // mode. 824141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->KeepCommentMode = KeepMacroComments; 825141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 826141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Create the new macro. 827141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MacroInfo *MI = new MacroInfo(MacroNameTok.getLocation()); 828141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 829141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token Tok; 830141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 831141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 832141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a function-like macro definition, parse the argument list, 833141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // marking each of the identifiers as being used as macro arguments. Also, 834141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // check other constraints on the first token of the macro body. 835141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.is(tok::eom)) { 836141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If there is no body to this macro, we have no special handling here. 837141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (Tok.is(tok::l_paren) && !Tok.hasLeadingSpace()) { 838141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // This is a function-like macro definition. Read the argument list. 839141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsFunctionLike(); 840141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ReadMacroDefinitionArgList(MI)) { 841141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Forget about MI. 842141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner delete MI; 843141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Throw away the rest of the line. 844141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurLexer->ParsingPreprocessorDirective) 845141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 846141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 847141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 848141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 849141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the first token after the arg list for down below. 850141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 851141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else if (!Tok.hasLeadingSpace()) { 852141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // C99 requires whitespace between the macro definition and the body. Emit 853141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // a diagnostic for something like "#define X+". 854141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Features.C99) { 855141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::ext_c99_whitespace_required_after_macro_name); 856141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 857141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // FIXME: C90/C++ do not get this diagnostic, but it does get a similar 858141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // one in some cases! 859141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 860141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 861141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // This is a normal token with leading space. Clear the leading space 862141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // marker on the first token to get proper expansion. 863141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Tok.clearFlag(Token::LeadingSpace); 864141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 865141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 866141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a definition of a variadic C99 function-like macro, not using 867141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the GNU named varargs extension, enabled __VA_ARGS__. 868141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 869141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // "Poison" __VA_ARGS__, which can only appear in the expansion of a macro. 870141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // This gets unpoisoned where it is allowed. 871141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(Ident__VA_ARGS__->isPoisoned() && "__VA_ARGS__ should be poisoned!"); 872141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->isC99Varargs()) 873141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Ident__VA_ARGS__->setIsPoisoned(false); 874141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 875141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Read the rest of the macro body. 876141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->isObjectLike()) { 877141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Object-like macros are very simple, just read their body. 878141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (Tok.isNot(tok::eom)) { 879141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->AddTokenToBody(Tok); 880141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 881141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 882141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 883141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 884141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 885141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Otherwise, read the body of a function-like macro. This has to validate 886141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the # (stringize) operator. 887141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner while (Tok.isNot(tok::eom)) { 888141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->AddTokenToBody(Tok); 889141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 890141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check C99 6.10.3.2p1: ensure that # operators are followed by macro 891141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // parameters in function-like macro expansions. 892141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (Tok.isNot(tok::hash)) { 893141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 894141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 895141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner continue; 896141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 897141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 898141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 899141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 900141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 901141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Not a macro arg identifier? 902141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!Tok.getIdentifierInfo() || 903141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->getArgumentNum(Tok.getIdentifierInfo()) == -1) { 904141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(Tok, diag::err_pp_stringize_not_parameter); 905141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner delete MI; 906141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 907141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Disable __VA_ARGS__ again. 908141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Ident__VA_ARGS__->setIsPoisoned(true); 909141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 910141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 911141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 912141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Things look ok, add the param name token to the macro. 913141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->AddTokenToBody(Tok); 914141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 915141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Get the next token of the macro. 916141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner LexUnexpandedToken(Tok); 917141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 918141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 919141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 920141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 921141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Disable __VA_ARGS__ again. 922141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Ident__VA_ARGS__->setIsPoisoned(true); 923141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 924141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check that there is no paste (##) operator at the begining or end of the 925141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // replacement list. 926141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner unsigned NumTokens = MI->getNumTokens(); 927141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (NumTokens != 0) { 928141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->getReplacementToken(0).is(tok::hashhash)) { 929141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getReplacementToken(0), diag::err_paste_at_start); 930141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner delete MI; 931141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 932141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 933141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI->getReplacementToken(NumTokens-1).is(tok::hashhash)) { 934141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getReplacementToken(NumTokens-1), diag::err_paste_at_end); 935141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner delete MI; 936141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 937141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 938141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 939141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 940141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is the primary source file, remember that this macro hasn't been 941141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // used yet. 942141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (isInPrimaryFile()) 943141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsUsed(false); 944141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 945141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, if this identifier already had a macro defined for it, verify that 946141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the macro bodies are identical and free the old definition. 947141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MacroInfo *OtherMI = getMacroInfo(MacroNameTok.getIdentifierInfo())) { 948141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!OtherMI->isUsed()) 949141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(OtherMI->getDefinitionLoc(), diag::pp_macro_not_used); 950141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 951141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Macros must be identical. This means all tokes and whitespace separation 952141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // must be the same. C99 6.10.3.2. 953141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!MI->isIdenticalTo(*OtherMI, *this)) { 954141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getDefinitionLoc(), diag::ext_pp_macro_redef, 955141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MacroNameTok.getIdentifierInfo()->getName()); 956141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(OtherMI->getDefinitionLoc(), diag::ext_pp_macro_redef2); 957141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 958141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner delete OtherMI; 959141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 960141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 961141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner setMacroInfo(MacroNameTok.getIdentifierInfo(), MI); 962141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 963141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 964141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleUndefDirective - Implements #undef. 965141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 966141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleUndefDirective(Token &UndefTok) { 967141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumUndefined; 968141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 969141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 970141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok, 2); 971141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 972141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 973141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MacroNameTok.is(tok::eom)) 974141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 975141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 976141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check to see if this is the last token on the #undef line. 977141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CheckEndOfDirective("#undef"); 978141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 979141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Okay, we finally have a valid identifier to undef. 980141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MacroInfo *MI = getMacroInfo(MacroNameTok.getIdentifierInfo()); 981141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 982141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the macro is not defined, this is a noop undef, just return. 983141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI == 0) return; 984141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 985141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!MI->isUsed()) 986141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Diag(MI->getDefinitionLoc(), diag::pp_macro_not_used); 987141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 988141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Free macro definition. 989141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner delete MI; 990141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner setMacroInfo(MacroNameTok.getIdentifierInfo(), 0); 991141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 992141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 993141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 994141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 995141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner// Preprocessor Conditional Directive Handling. 996141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner//===----------------------------------------------------------------------===// 997141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 998141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIfdefDirective - Implements the #ifdef/#ifndef directive. isIfndef is 999141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// true when this is a #ifndef directive. ReadAnyTokensBeforeDirective is true 1000141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// if any tokens have been returned or pp-directives activated before this 1001141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// #ifndef has been lexed. 1002141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1003141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIfdefDirective(Token &Result, bool isIfndef, 1004141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ReadAnyTokensBeforeDirective) { 1005141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumIf; 1006141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token DirectiveTok = Result; 1007141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1008141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner Token MacroNameTok; 1009141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ReadMacroName(MacroNameTok); 1010141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1011141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Error reading macro name? If so, diagnostic already issued. 1012141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MacroNameTok.is(tok::eom)) { 1013141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Skip code until we get to #endif. This helps with recovery by not 1014141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // emitting an error when the #endif is reached. 1015141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner SkipExcludedConditionalBlock(DirectiveTok.getLocation(), 1016141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*Foundnonskip*/false, /*FoundElse*/false); 1017141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return; 1018141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1019141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1020141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check to see if this is the last token on the #if[n]def line. 1021141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CheckEndOfDirective(isIfndef ? "#ifndef" : "#ifdef"); 1022141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1023141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurLexer->getConditionalStackDepth() == 0) { 1024141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If the start of a top-level #ifdef, inform MIOpt. 1025141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!ReadAnyTokensBeforeDirective) { 1026141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(isIfndef && "#ifdef shouldn't reach here"); 1027141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->MIOpt.EnterTopLevelIFNDEF(MacroNameTok.getIdentifierInfo()); 1028141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else 1029141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->MIOpt.EnterTopLevelConditional(); 1030141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1031141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1032141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *MII = MacroNameTok.getIdentifierInfo(); 1033141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MacroInfo *MI = getMacroInfo(MII); 1034141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1035141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If there is a macro, process it. 1036141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (MI) // Mark it used. 1037141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner MI->setIsUsed(true); 1038141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1039141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Should we include the stuff contained by this directive? 1040141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (!MI == isIfndef) { 1041141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, remember that we are inside a conditional, then lex the next token. 1042141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->pushConditionalLevel(DirectiveTok.getLocation(), /*wasskip*/false, 1043141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*foundnonskip*/true, /*foundelse*/false); 1044141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 1045141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // No, skip the contents of this block and return the first token after it. 1046141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner SkipExcludedConditionalBlock(DirectiveTok.getLocation(), 1047141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*Foundnonskip*/false, 1048141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*FoundElse*/false); 1049141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1050141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1051141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1052141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleIfDirective - Implements the #if directive. 1053141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1054141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleIfDirective(Token &IfToken, 1055141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ReadAnyTokensBeforeDirective) { 1056141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumIf; 1057141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1058141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Parse and evaluation the conditional expression. 1059141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner IdentifierInfo *IfNDefMacro = 0; 1060141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner bool ConditionalTrue = EvaluateDirectiveExpression(IfNDefMacro); 1061141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 10620049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes 10630049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes // If this condition is equivalent to #ifndef X, and if this is the first 10640049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes // directive seen, handle it for the multiple-include optimization. 10650049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes if (CurLexer->getConditionalStackDepth() == 0) { 10660049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes if (!ReadAnyTokensBeforeDirective && IfNDefMacro) 10670049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes CurLexer->MIOpt.EnterTopLevelIFNDEF(IfNDefMacro); 10680049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes else 10690049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes CurLexer->MIOpt.EnterTopLevelConditional(); 10700049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes } 10710049db6ce127cbf4671a6a81ad4dfe61fdc4aa5cNuno Lopes 1072141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Should we include the stuff contained by this directive? 1073141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (ConditionalTrue) { 1074141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Yes, remember that we are inside a conditional, then lex the next token. 1075141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->pushConditionalLevel(IfToken.getLocation(), /*wasskip*/false, 1076141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*foundnonskip*/true, /*foundelse*/false); 1077141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } else { 1078141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // No, skip the contents of this block and return the first token after it. 1079141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner SkipExcludedConditionalBlock(IfToken.getLocation(), /*Foundnonskip*/false, 1080141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*FoundElse*/false); 1081141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1082141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1083141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1084141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// HandleEndifDirective - Implements the #endif directive. 1085141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner/// 1086141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleEndifDirective(Token &EndifToken) { 1087141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumEndif; 1088141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1089141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Check that this is the whole directive. 1090141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CheckEndOfDirective("#endif"); 1091141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1092141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CondInfo; 1093141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurLexer->popConditionalLevel(CondInfo)) { 1094141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // No conditionals on the stack: this is an #endif without an #if. 1095141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return Diag(EndifToken, diag::err_pp_endif_without_if); 1096141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner } 1097141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1098141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this the end of a top-level #endif, inform MIOpt. 1099141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurLexer->getConditionalStackDepth() == 0) 1100141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->MIOpt.ExitTopLevelConditional(); 1101141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1102141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner assert(!CondInfo.WasSkipping && !CurLexer->LexingRawMode && 1103141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner "This code should only be reachable in the non-skipping case!"); 1104141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1105141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1106141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1107141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleElseDirective(Token &Result) { 1108141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumElse; 1109141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1110141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #else directive in a non-skipping conditional... start skipping. 1111141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CheckEndOfDirective("#else"); 1112141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1113141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CI; 1114141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurLexer->popConditionalLevel(CI)) 1115141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return Diag(Result, diag::pp_err_else_without_if); 1116141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1117141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a top-level #else, inform the MIOpt. 1118141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurLexer->getConditionalStackDepth() == 0) 1119141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->MIOpt.EnterTopLevelConditional(); 1120141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1121141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #else with a #else before it, report the error. 1122141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CI.FoundElse) Diag(Result, diag::pp_err_else_after_else); 1123141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1124141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, skip the rest of the contents of this block and return the first 1125141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // token after it. 1126141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return SkipExcludedConditionalBlock(CI.IfLoc, /*Foundnonskip*/true, 1127141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*FoundElse*/true); 1128141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1129141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1130141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattnervoid Preprocessor::HandleElifDirective(Token &ElifToken) { 1131141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner ++NumElse; 1132141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1133141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // #elif directive in a non-skipping conditional... start skipping. 1134141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // We don't care what the condition is, because we will always skip it (since 1135141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // the block immediately before it was included). 1136141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner DiscardUntilEndOfDirective(); 1137141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1138141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner PPConditionalInfo CI; 1139141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurLexer->popConditionalLevel(CI)) 1140141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return Diag(ElifToken, diag::pp_err_elif_without_if); 1141141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1142141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a top-level #elif, inform the MIOpt. 1143141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CurLexer->getConditionalStackDepth() == 0) 1144141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner CurLexer->MIOpt.EnterTopLevelConditional(); 1145141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1146141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // If this is a #elif with a #else before it, report the error. 1147141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner if (CI.FoundElse) Diag(ElifToken, diag::pp_err_elif_after_else); 1148141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1149141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // Finally, skip the rest of the contents of this block and return the first 1150141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner // token after it. 1151141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner return SkipExcludedConditionalBlock(CI.IfLoc, /*Foundnonskip*/true, 1152141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner /*FoundElse*/CI.FoundElse); 1153141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner} 1154141e71fec621f65ab401dbe66609f7d3c033c6a5Chris Lattner 1155