diff options
| -rw-r--r-- | include/clang/Lex/Token.h | 3 | ||||
| -rw-r--r-- | lib/Lex/PPMacroExpansion.cpp | 2350 | ||||
| -rw-r--r-- | lib/Lex/TokenLexer.cpp | 6 | ||||
| -rw-r--r-- | test/Preprocessor/microsoft-ext.c | 7 |
4 files changed, 1192 insertions, 1174 deletions
diff --git a/include/clang/Lex/Token.h b/include/clang/Lex/Token.h index 9c5a023f30..e422c67053 100644 --- a/include/clang/Lex/Token.h +++ b/include/clang/Lex/Token.h @@ -76,7 +76,8 @@ public: DisableExpand = 0x04, // This identifier may never be macro expanded. NeedsCleaning = 0x08, // Contained an escaped newline or trigraph. LeadingEmptyMacro = 0x10, // Empty macro exists before this token. - HasUDSuffix = 0x20 // This string or character literal has a ud-suffix. + HasUDSuffix = 0x20, // This string or character literal has a ud-suffix. + IgnoredComma = 0x40 // Flags ignored commas from nested macro expansions. }; tok::TokenKind getKind() const { return (tok::TokenKind)Kind; } diff --git a/lib/Lex/PPMacroExpansion.cpp b/lib/Lex/PPMacroExpansion.cpp index 524f3ab82c..a99a52f861 100644 --- a/lib/Lex/PPMacroExpansion.cpp +++ b/lib/Lex/PPMacroExpansion.cpp @@ -1,1173 +1,1177 @@ -//===--- MacroExpansion.cpp - Top level Macro Expansion -------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file implements the top level handling of macro expasion for the -// preprocessor. -// -//===----------------------------------------------------------------------===// - -#include "clang/Lex/Preprocessor.h" -#include "MacroArgs.h" -#include "clang/Lex/MacroInfo.h" -#include "clang/Basic/SourceManager.h" -#include "clang/Basic/FileManager.h" -#include "clang/Basic/TargetInfo.h" -#include "clang/Lex/LexDiagnostic.h" -#include "clang/Lex/CodeCompletionHandler.h" -#include "clang/Lex/ExternalPreprocessorSource.h" -#include "clang/Lex/LiteralSupport.h" -#include "llvm/ADT/StringSwitch.h" -#include "llvm/ADT/STLExtras.h" -#include "llvm/Config/llvm-config.h" -#include "llvm/Support/raw_ostream.h" -#include "llvm/Support/ErrorHandling.h" -#include <cstdio> -#include <ctime> -using namespace clang; - -MacroInfo *Preprocessor::getInfoForMacro(IdentifierInfo *II) const { - assert(II->hasMacroDefinition() && "Identifier is not a macro!"); - - macro_iterator Pos = Macros.find(II); - if (Pos == Macros.end()) { - // Load this macro from the external source. - getExternalSource()->LoadMacroDefinition(II); - Pos = Macros.find(II); - } - assert(Pos != Macros.end() && "Identifier macro info is missing!"); - assert(Pos->second->getUndefLoc().isInvalid() && "Macro is undefined!"); - return Pos->second; -} - -/// setMacroInfo - Specify a macro for this identifier. -/// -void Preprocessor::setMacroInfo(IdentifierInfo *II, MacroInfo *MI, - bool LoadedFromAST) { - assert(MI && "MacroInfo should be non-zero!"); - MI->setPreviousDefinition(Macros[II]); - Macros[II] = MI; - II->setHasMacroDefinition(true); - if (II->isFromAST() && !LoadedFromAST) - II->setChangedSinceDeserialization(); -} - -/// \brief Undefine a macro for this identifier. -void Preprocessor::clearMacroInfo(IdentifierInfo *II) { - assert(II->hasMacroDefinition() && "Macro is not defined!"); - assert(Macros[II]->getUndefLoc().isValid() && "Macro is still defined!"); - II->setHasMacroDefinition(false); - if (II->isFromAST()) - II->setChangedSinceDeserialization(); -} - -/// RegisterBuiltinMacro - Register the specified identifier in the identifier -/// table and mark it as a builtin macro to be expanded. -static IdentifierInfo *RegisterBuiltinMacro(Preprocessor &PP, const char *Name){ - // Get the identifier. - IdentifierInfo *Id = PP.getIdentifierInfo(Name); - - // Mark it as being a macro that is builtin. - MacroInfo *MI = PP.AllocateMacroInfo(SourceLocation()); - MI->setIsBuiltinMacro(); - PP.setMacroInfo(Id, MI); - return Id; -} - - -/// RegisterBuiltinMacros - Register builtin macros, such as __LINE__ with the -/// identifier table. -void Preprocessor::RegisterBuiltinMacros() { - Ident__LINE__ = RegisterBuiltinMacro(*this, "__LINE__"); - Ident__FILE__ = RegisterBuiltinMacro(*this, "__FILE__"); - Ident__DATE__ = RegisterBuiltinMacro(*this, "__DATE__"); - Ident__TIME__ = RegisterBuiltinMacro(*this, "__TIME__"); - Ident__COUNTER__ = RegisterBuiltinMacro(*this, "__COUNTER__"); - Ident_Pragma = RegisterBuiltinMacro(*this, "_Pragma"); - - // GCC Extensions. - Ident__BASE_FILE__ = RegisterBuiltinMacro(*this, "__BASE_FILE__"); - Ident__INCLUDE_LEVEL__ = RegisterBuiltinMacro(*this, "__INCLUDE_LEVEL__"); - Ident__TIMESTAMP__ = RegisterBuiltinMacro(*this, "__TIMESTAMP__"); - - // Clang Extensions. - Ident__has_feature = RegisterBuiltinMacro(*this, "__has_feature"); - Ident__has_extension = RegisterBuiltinMacro(*this, "__has_extension"); - Ident__has_builtin = RegisterBuiltinMacro(*this, "__has_builtin"); - Ident__has_attribute = RegisterBuiltinMacro(*this, "__has_attribute"); - Ident__has_include = RegisterBuiltinMacro(*this, "__has_include"); - Ident__has_include_next = RegisterBuiltinMacro(*this, "__has_include_next"); - Ident__has_warning = RegisterBuiltinMacro(*this, "__has_warning"); - - // Microsoft Extensions. - if (LangOpts.MicrosoftExt) - Ident__pragma = RegisterBuiltinMacro(*this, "__pragma"); - else - Ident__pragma = 0; -} - -/// isTrivialSingleTokenExpansion - Return true if MI, which has a single token -/// in its expansion, currently expands to that token literally. -static bool isTrivialSingleTokenExpansion(const MacroInfo *MI, - const IdentifierInfo *MacroIdent, - Preprocessor &PP) { - IdentifierInfo *II = MI->getReplacementToken(0).getIdentifierInfo(); - - // If the token isn't an identifier, it's always literally expanded. - if (II == 0) return true; - - // If the information about this identifier is out of date, update it from - // the external source. - if (II->isOutOfDate()) - PP.getExternalSource()->updateOutOfDateIdentifier(*II); - - // If the identifier is a macro, and if that macro is enabled, it may be - // expanded so it's not a trivial expansion. - if (II->hasMacroDefinition() && PP.getMacroInfo(II)->isEnabled() && - // Fast expanding "#define X X" is ok, because X would be disabled. - II != MacroIdent) - return false; - - // If this is an object-like macro invocation, it is safe to trivially expand - // it. - if (MI->isObjectLike()) return true; - - // If this is a function-like macro invocation, it's safe to trivially expand - // as long as the identifier is not a macro argument. - for (MacroInfo::arg_iterator I = MI->arg_begin(), E = MI->arg_end(); - I != E; ++I) - if (*I == II) - return false; // Identifier is a macro argument. - - return true; -} - - -/// isNextPPTokenLParen - Determine whether the next preprocessor token to be -/// lexed is a '('. If so, consume the token and return true, if not, this -/// method should have no observable side-effect on the lexed tokens. -bool Preprocessor::isNextPPTokenLParen() { - // Do some quick tests for rejection cases. - unsigned Val; - if (CurLexer) - Val = CurLexer->isNextPPTokenLParen(); - else if (CurPTHLexer) - Val = CurPTHLexer->isNextPPTokenLParen(); - else - Val = CurTokenLexer->isNextTokenLParen(); - - if (Val == 2) { - // We have run off the end. If it's a source file we don't - // examine enclosing ones (C99 5.1.1.2p4). Otherwise walk up the - // macro stack. - if (CurPPLexer) - return false; - for (unsigned i = IncludeMacroStack.size(); i != 0; --i) { - IncludeStackInfo &Entry = IncludeMacroStack[i-1]; - if (Entry.TheLexer) - Val = Entry.TheLexer->isNextPPTokenLParen(); - else if (Entry.ThePTHLexer) - Val = Entry.ThePTHLexer->isNextPPTokenLParen(); - else - Val = Entry.TheTokenLexer->isNextTokenLParen(); - - if (Val != 2) - break; - - // Ran off the end of a source file? - if (Entry.ThePPLexer) - return false; - } - } - - // Okay, if we know that the token is a '(', lex it and return. Otherwise we - // have found something that isn't a '(' or we found the end of the - // translation unit. In either case, return false. - return Val == 1; -} - -/// HandleMacroExpandedIdentifier - If an identifier token is read that is to be -/// expanded as a macro, handle it and return the next token as 'Identifier'. -bool Preprocessor::HandleMacroExpandedIdentifier(Token &Identifier, - MacroInfo *MI) { - // If this is a macro expansion in the "#if !defined(x)" line for the file, - // then the macro could expand to different things in other contexts, we need - // to disable the optimization in this case. - if (CurPPLexer) CurPPLexer->MIOpt.ExpandedMacro(); - - // If this is a builtin macro, like __LINE__ or _Pragma, handle it specially. - if (MI->isBuiltinMacro()) { - if (Callbacks) Callbacks->MacroExpands(Identifier, MI, - Identifier.getLocation()); - ExpandBuiltinMacro(Identifier); - return false; - } - - /// Args - If this is a function-like macro expansion, this contains, - /// for each macro argument, the list of tokens that were provided to the - /// invocation. - MacroArgs *Args = 0; - - // Remember where the end of the expansion occurred. For an object-like - // macro, this is the identifier. For a function-like macro, this is the ')'. - SourceLocation ExpansionEnd = Identifier.getLocation(); - - // If this is a function-like macro, read the arguments. - if (MI->isFunctionLike()) { - // C99 6.10.3p10: If the preprocessing token immediately after the macro - // name isn't a '(', this macro should not be expanded. - if (!isNextPPTokenLParen()) - return true; - - // Remember that we are now parsing the arguments to a macro invocation. - // Preprocessor directives used inside macro arguments are not portable, and - // this enables the warning. - InMacroArgs = true; - Args = ReadFunctionLikeMacroArgs(Identifier, MI, ExpansionEnd); - - // Finished parsing args. - InMacroArgs = false; - - // If there was an error parsing the arguments, bail out. - if (Args == 0) return false; - - ++NumFnMacroExpanded; - } else { - ++NumMacroExpanded; - } - - // Notice that this macro has been used. - markMacroAsUsed(MI); - - // Remember where the token is expanded. - SourceLocation ExpandLoc = Identifier.getLocation(); - SourceRange ExpansionRange(ExpandLoc, ExpansionEnd); - - if (Callbacks) { - if (InMacroArgs) { - // We can have macro expansion inside a conditional directive while - // reading the function macro arguments. To ensure, in that case, that - // MacroExpands callbacks still happen in source order, queue this - // callback to have it happen after the function macro callback. - DelayedMacroExpandsCallbacks.push_back( - MacroExpandsInfo(Identifier, MI, ExpansionRange)); - } else { - Callbacks->MacroExpands(Identifier, MI, ExpansionRange); - if (!DelayedMacroExpandsCallbacks.empty()) { - for (unsigned i=0, e = DelayedMacroExpandsCallbacks.size(); i!=e; ++i) { - MacroExpandsInfo &Info = DelayedMacroExpandsCallbacks[i]; - Callbacks->MacroExpands(Info.Tok, Info.MI, Info.Range); - } - DelayedMacroExpandsCallbacks.clear(); - } - } - } - - // If we started lexing a macro, enter the macro expansion body. - - // If this macro expands to no tokens, don't bother to push it onto the - // expansion stack, only to take it right back off. - if (MI->getNumTokens() == 0) { - // No need for arg info. - if (Args) Args->destroy(*this); - - // Ignore this macro use, just return the next token in the current - // buffer. - bool HadLeadingSpace = Identifier.hasLeadingSpace(); - bool IsAtStartOfLine = Identifier.isAtStartOfLine(); - - Lex(Identifier); - - // If the identifier isn't on some OTHER line, inherit the leading - // whitespace/first-on-a-line property of this token. This handles - // stuff like "! XX," -> "! ," and " XX," -> " ,", when XX is - // empty. - if (!Identifier.isAtStartOfLine()) { - if (IsAtStartOfLine) Identifier.setFlag(Token::StartOfLine); - if (HadLeadingSpace) Identifier.setFlag(Token::LeadingSpace); - } - Identifier.setFlag(Token::LeadingEmptyMacro); - ++NumFastMacroExpanded; - return false; - - } else if (MI->getNumTokens() == 1 && - isTrivialSingleTokenExpansion(MI, Identifier.getIdentifierInfo(), - *this)) { - // Otherwise, if this macro expands into a single trivially-expanded - // token: expand it now. This handles common cases like - // "#define VAL 42". - - // No need for arg info. - if (Args) Args->destroy(*this); - - // Propagate the isAtStartOfLine/hasLeadingSpace markers of the macro - // identifier to the expanded token. - bool isAtStartOfLine = Identifier.isAtStartOfLine(); - bool hasLeadingSpace = Identifier.hasLeadingSpace(); - - // Replace the result token. - Identifier = MI->getReplacementToken(0); - - // Restore the StartOfLine/LeadingSpace markers. - Identifier.setFlagValue(Token::StartOfLine , isAtStartOfLine); - Identifier.setFlagValue(Token::LeadingSpace, hasLeadingSpace); - - // Update the tokens location to include both its expansion and physical - // locations. - SourceLocation Loc = - SourceMgr.createExpansionLoc(Identifier.getLocation(), ExpandLoc, - ExpansionEnd,Identifier.getLength()); - Identifier.setLocation(Loc); - - // If this is a disabled macro or #define X X, we must mark the result as - // unexpandable. - if (IdentifierInfo *NewII = Identifier.getIdentifierInfo()) { - if (MacroInfo *NewMI = getMacroInfo(NewII)) - if (!NewMI->isEnabled() || NewMI == MI) { - Identifier.setFlag(Token::DisableExpand); - Diag(Identifier, diag::pp_disabled_macro_expansion); - } - } - - // Since this is not an identifier token, it can't be macro expanded, so - // we're done. - ++NumFastMacroExpanded; - return false; - } - - // Start expanding the macro. - EnterMacro(Identifier, ExpansionEnd, MI, Args); - - // Now that the macro is at the top of the include stack, ask the - // preprocessor to read the next token from it. - Lex(Identifier); - return false; -} - -/// ReadFunctionLikeMacroArgs - After reading "MACRO" and knowing that the next -/// token is the '(' of the macro, this method is invoked to read all of the -/// actual arguments specified for the macro invocation. This returns null on -/// error. -MacroArgs *Preprocessor::ReadFunctionLikeMacroArgs(Token &MacroName, - MacroInfo *MI, - SourceLocation &MacroEnd) { - // The number of fixed arguments to parse. - unsigned NumFixedArgsLeft = MI->getNumArgs(); - bool isVariadic = MI->isVariadic(); - - // Outer loop, while there are more arguments, keep reading them. - Token Tok; - - // Read arguments as unexpanded tokens. This avoids issues, e.g., where - // an argument value in a macro could expand to ',' or '(' or ')'. - LexUnexpandedToken(Tok); - assert(Tok.is(tok::l_paren) && "Error computing l-paren-ness?"); - - // ArgTokens - Build up a list of tokens that make up each argument. Each - // argument is separated by an EOF token. Use a SmallVector so we can avoid - // heap allocations in the common case. - SmallVector<Token, 64> ArgTokens; - - unsigned NumActuals = 0; - while (Tok.isNot(tok::r_paren)) { - assert((Tok.is(tok::l_paren) || Tok.is(tok::comma)) && - "only expect argument separators here"); - - unsigned ArgTokenStart = ArgTokens.size(); - SourceLocation ArgStartLoc = Tok.getLocation(); - - // C99 6.10.3p11: Keep track of the number of l_parens we have seen. Note - // that we already consumed the first one. - unsigned NumParens = 0; - - while (1) { - // Read arguments as unexpanded tokens. This avoids issues, e.g., where - // an argument value in a macro could expand to ',' or '(' or ')'. - LexUnexpandedToken(Tok); - - if (Tok.is(tok::eof) || Tok.is(tok::eod)) { // "#if f(<eof>" & "#if f(\n" - Diag(MacroName, diag::err_unterm_macro_invoc); - // Do not lose the EOF/EOD. Return it to the client. - MacroName = Tok; - return 0; - } else if (Tok.is(tok::r_paren)) { - // If we found the ) token, the macro arg list is done. - if (NumParens-- == 0) { - MacroEnd = Tok.getLocation(); - break; - } - } else if (Tok.is(tok::l_paren)) { - ++NumParens; - } else if (Tok.is(tok::comma) && NumParens == 0) { - // Comma ends this argument if there are more fixed arguments expected. - // However, if this is a variadic macro, and this is part of the - // variadic part, then the comma is just an argument token. - if (!isVariadic) break; - if (NumFixedArgsLeft > 1) - break; - } else if (Tok.is(tok::comment) && !KeepMacroComments) { - // If this is a comment token in the argument list and we're just in - // -C mode (not -CC mode), discard the comment. - continue; - } else if (Tok.getIdentifierInfo() != 0) { - // Reading macro arguments can cause macros that we are currently - // expanding from to be popped off the expansion stack. Doing so causes - // them to be reenabled for expansion. Here we record whether any - // identifiers we lex as macro arguments correspond to disabled macros. - // If so, we mark the token as noexpand. This is a subtle aspect of - // C99 6.10.3.4p2. - if (MacroInfo *MI = getMacroInfo(Tok.getIdentifierInfo())) - if (!MI->isEnabled()) - Tok.setFlag(Token::DisableExpand); - } else if (Tok.is(tok::code_completion)) { - if (CodeComplete) - CodeComplete->CodeCompleteMacroArgument(MacroName.getIdentifierInfo(), - MI, NumActuals); - // Don't mark that we reached the code-completion point because the - // parser is going to handle the token and there will be another - // code-completion callback. - } - - ArgTokens.push_back(Tok); - } - - // If this was an empty argument list foo(), don't add this as an empty - // argument. - if (ArgTokens.empty() && Tok.getKind() == tok::r_paren) - break; - - // If this is not a variadic macro, and too many args were specified, emit - // an error. - if (!isVariadic && NumFixedArgsLeft == 0) { - if (ArgTokens.size() != ArgTokenStart) - ArgStartLoc = ArgTokens[ArgTokenStart].getLocation(); - - // Emit the diagnostic at the macro name in case there is a missing ). - // Emitting it at the , could be far away from the macro name. - Diag(ArgStartLoc, diag::err_too_many_args_in_macro_invoc); - return 0; - } - - // Empty arguments are standard in C99 and C++0x, and are supported as an extension in - // other modes. - if (ArgTokens.size() == ArgTokenStart && !LangOpts.C99) - Diag(Tok, LangOpts.CPlusPlus0x ? - diag::warn_cxx98_compat_empty_fnmacro_arg : - diag::ext_empty_fnmacro_arg); - - // Add a marker EOF token to the end of the token list for this argument. - Token EOFTok; - EOFTok.startToken(); - EOFTok.setKind(tok::eof); - EOFTok.setLocation(Tok.getLocation()); - EOFTok.setLength(0); - ArgTokens.push_back(EOFTok); - ++NumActuals; - assert(NumFixedArgsLeft != 0 && "Too many arguments parsed"); - --NumFixedArgsLeft; - } - - // Okay, we either found the r_paren. Check to see if we parsed too few - // arguments. - unsigned MinArgsExpected = MI->getNumArgs(); - - // See MacroArgs instance var for description of this. - bool isVarargsElided = false; - - if (NumActuals < MinArgsExpected) { - // There are several cases where too few arguments is ok, handle them now. - if (NumActuals == 0 && MinArgsExpected == 1) { - // #define A(X) or #define A(...) ---> A() - - // If there is exactly one argument, and that argument is missing, - // then we have an empty "()" argument empty list. This is fine, even if - // the macro expects one argument (the argument is just empty). - isVarargsElided = MI->isVariadic(); - } else if (MI->isVariadic() && - (NumActuals+1 == MinArgsExpected || // A(x, ...) -> A(X) - (NumActuals == 0 && MinArgsExpected == 2))) {// A(x,...) -> A() - // Varargs where the named vararg parameter is missing: OK as extension. - // #define A(x, ...) - // A("blah") - Diag(Tok, diag::ext_missing_varargs_arg); - Diag(MI->getDefinitionLoc(), diag::note_macro_here) - << MacroName.getIdentifierInfo(); - - // Remember this occurred, allowing us to elide the comma when used for - // cases like: - // #define A(x, foo...) blah(a, ## foo) - // #define B(x, ...) blah(a, ## __VA_ARGS__) - // #define C(...) blah(a, ## __VA_ARGS__) - // A(x) B(x) C() - isVarargsElided = true; - } else { - // Otherwise, emit the error. - Diag(Tok, diag::err_too_few_args_in_macro_invoc); - return 0; - } - - // Add a marker EOF token to the end of the token list for this argument. - SourceLocation EndLoc = Tok.getLocation(); - Tok.startToken(); - Tok.setKind(tok::eof); - Tok.setLocation(EndLoc); - Tok.setLength(0); - ArgTokens.push_back(Tok); - - // If we expect two arguments, add both as empty. - if (NumActuals == 0 && MinArgsExpected == 2) - ArgTokens.push_back(Tok); - - } else if (NumActuals > MinArgsExpected && !MI->isVariadic()) { - // Emit the diagnostic at the macro name in case there is a missing ). - // Emitting it at the , could be far away from the macro name. - Diag(MacroName, diag::err_too_many_args_in_macro_invoc); - return 0; - } - - return MacroArgs::create(MI, ArgTokens, isVarargsElided, *this); -} - -/// \brief Keeps macro expanded tokens for TokenLexers. -// -/// Works like a stack; a TokenLexer adds the macro expanded tokens that is -/// going to lex in the cache and when it finishes the tokens are removed -/// from the end of the cache. -Token *Preprocessor::cacheMacroExpandedTokens(TokenLexer *tokLexer, - ArrayRef<Token> tokens) { - assert(tokLexer); - if (tokens.empty()) - return 0; - - size_t newIndex = MacroExpandedTokens.size(); - bool cacheNeedsToGrow = tokens.size() > - MacroExpandedTokens.capacity()-MacroExpandedTokens.size(); - MacroExpandedTokens.append(tokens.begin(), tokens.end()); - - if (cacheNeedsToGrow) { - // Go through all the TokenLexers whose 'Tokens' pointer points in the - // buffer and update the pointers to the (potential) new buffer array. - for (unsigned i = 0, e = MacroExpandingLexersStack.size(); i != e; ++i) { - TokenLexer *prevLexer; - size_t tokIndex; - llvm::tie(prevLexer, tokIndex) = MacroExpandingLexersStack[i]; - prevLexer->Tokens = MacroExpandedTokens.data() + tokIndex; - } - } - - MacroExpandingLexersStack.push_back(std::make_pair(tokLexer, newIndex)); - return MacroExpandedTokens.data() + newIndex; -} - -void Preprocessor::removeCachedMacroExpandedTokensOfLastLexer() { - assert(!MacroExpandingLexersStack.empty()); - size_t tokIndex = MacroExpandingLexersStack.back().second; - assert(tokIndex < MacroExpandedTokens.size()); - // Pop the cached macro expanded tokens from the end. - MacroExpandedTokens.resize(tokIndex); - MacroExpandingLexersStack.pop_back(); -} - -/// ComputeDATE_TIME - Compute the current time, enter it into the specified -/// scratch buffer, then return DATELoc/TIMELoc locations with the position of -/// the identifier tokens inserted. -static void ComputeDATE_TIME(SourceLocation &DATELoc, SourceLocation &TIMELoc, - Preprocessor &PP) { - time_t TT = time(0); - struct tm *TM = localtime(&TT); - - static const char * const Months[] = { - "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec" - }; - - char TmpBuffer[32]; -#ifdef LLVM_ON_WIN32 - sprintf(TmpBuffer, "\"%s %2d %4d\"", Months[TM->tm_mon], TM->tm_mday, - TM->tm_year+1900); -#else - snprintf(TmpBuffer, sizeof(TmpBuffer), "\"%s %2d %4d\"", Months[TM->tm_mon], TM->tm_mday, - TM->tm_year+1900); -#endif - - Token TmpTok; - TmpTok.startToken(); - PP.CreateString(TmpBuffer, strlen(TmpBuffer), TmpTok); - DATELoc = TmpTok.getLocation(); - -#ifdef LLVM_ON_WIN32 - sprintf(TmpBuffer, "\"%02d:%02d:%02d\"", TM->tm_hour, TM->tm_min, TM->tm_sec); -#else - snprintf(TmpBuffer, sizeof(TmpBuffer), "\"%02d:%02d:%02d\"", TM->tm_hour, TM->tm_min, TM->tm_sec); -#endif - PP.CreateString(TmpBuffer, strlen(TmpBuffer), TmpTok); - TIMELoc = TmpTok.getLocation(); -} - - -/// HasFeature - Return true if we recognize and implement the feature -/// specified by the identifier as a standard language feature. -static bool HasFeature(const Preprocessor &PP, const IdentifierInfo *II) { - const LangOptions &LangOpts = PP.getLangOpts(); - StringRef Feature = II->getName(); - - // Normalize the feature name, __foo__ becomes foo. - if (Feature.startswith("__") && Feature.endswith("__") && Feature.size() >= 4) - Feature = Feature.substr(2, Feature.size() - 4); - - return llvm::StringSwitch<bool>(Feature) - .Case("address_sanitizer", LangOpts.AddressSanitizer) - .Case("attribute_analyzer_noreturn", true) - .Case("attribute_availability", true) - .Case("attribute_availability_with_message", true) - .Case("attribute_cf_returns_not_retained", true) - .Case("attribute_cf_returns_retained", true) - .Case("attribute_deprecated_with_message", true) - .Case("attribute_ext_vector_type", true) - .Case("attribute_ns_returns_not_retained", true) - .Case("attribute_ns_returns_retained", true) - .Case("attribute_ns_consumes_self", true) - .Case("attribute_ns_consumed", true) - .Case("attribute_cf_consumed", true) - .Case("attribute_objc_ivar_unused", true) - .Case("attribute_objc_method_family", true) - .Case("attribute_overloadable", true) - .Case("attribute_unavailable_with_message", true) - .Case("attribute_unused_on_fields", true) - .Case("blocks", LangOpts.Blocks) - .Case("cxx_exceptions", LangOpts.Exceptions) - .Case("cxx_rtti", LangOpts.RTTI) - .Case("enumerator_attributes", true) - // Objective-C features - .Case("objc_arr", LangOpts.ObjCAutoRefCount) // FIXME: REMOVE? - .Case("objc_arc", LangOpts.ObjCAutoRefCount) - .Case("objc_arc_weak", LangOpts.ObjCARCWeak) - .Case("objc_default_synthesize_properties", LangOpts.ObjC2) - .Case("objc_fixed_enum", LangOpts.ObjC2) - .Case("objc_instancetype", LangOpts.ObjC2) - .Case("objc_modules", LangOpts.ObjC2 && LangOpts.Modules) - .Case("objc_nonfragile_abi", LangOpts.ObjCRuntime.isNonFragile()) - .Case("objc_weak_class", LangOpts.ObjCRuntime.hasWeakClassImport()) - .Case("ownership_holds", true) - .Case("ownership_returns", true) - .Case("ownership_takes", true) - .Case("objc_bool", true) - .Case("objc_subscripting", LangOpts.ObjCRuntime.isNonFragile()) - .Case("objc_array_literals", LangOpts.ObjC2) - .Case("objc_dictionary_literals", LangOpts.ObjC2) - .Case("objc_boxed_expressions", LangOpts.ObjC2) - .Case("arc_cf_code_audited", true) - // C11 features - .Case("c_alignas", LangOpts.C11) - .Case("c_atomic", LangOpts.C11) - .Case("c_generic_selections", LangOpts.C11) - .Case("c_static_assert", LangOpts.C11) - // C++11 features - .Case("cxx_access_control_sfinae", LangOpts.CPlusPlus0x) - .Case("cxx_alias_templates", LangOpts.CPlusPlus0x) - .Case("cxx_alignas", LangOpts.CPlusPlus0x) - .Case("cxx_atomic", LangOpts.CPlusPlus0x) - .Case("cxx_attributes", LangOpts.CPlusPlus0x) - .Case("cxx_auto_type", LangOpts.CPlusPlus0x) - .Case("cxx_constexpr", LangOpts.CPlusPlus0x) - .Case("cxx_decltype", LangOpts.CPlusPlus0x) - .Case("cxx_decltype_incomplete_return_types", LangOpts.CPlusPlus0x) - .Case("cxx_default_function_template_args", LangOpts.CPlusPlus0x) - .Case("cxx_defaulted_functions", LangOpts.CPlusPlus0x) - .Case("cxx_delegating_constructors", LangOpts.CPlusPlus0x) - .Case("cxx_deleted_functions", LangOpts.CPlusPlus0x) - .Case("cxx_explicit_conversions", LangOpts.CPlusPlus0x) - .Case("cxx_generalized_initializers", LangOpts.CPlusPlus0x) - .Case("cxx_implicit_moves", LangOpts.CPlusPlus0x) - //.Case("cxx_inheriting_constructors", false) - .Case("cxx_inline_namespaces", LangOpts.CPlusPlus0x) - .Case("cxx_lambdas", LangOpts.CPlusPlus0x) - .Case("cxx_local_type_template_args", LangOpts.CPlusPlus0x) - .Case("cxx_nonstatic_member_init", LangOpts.CPlusPlus0x) - .Case("cxx_noexcept", LangOpts.CPlusPlus0x) - .Case("cxx_nullptr", LangOpts.CPlusPlus0x) - .Case("cxx_override_control", LangOpts.CPlusPlus0x) - .Case("cxx_range_for", LangOpts.CPlusPlus0x) - .Case("cxx_raw_string_literals", LangOpts.CPlusPlus0x) - .Case("cxx_reference_qualified_functions", LangOpts.CPlusPlus0x) - .Case("cxx_rvalue_references", LangOpts.CPlusPlus0x) - .Case("cxx_strong_enums", LangOpts.CPlusPlus0x) - .Case("cxx_static_assert", LangOpts.CPlusPlus0x) - .Case("cxx_trailing_return", LangOpts.CPlusPlus0x) - .Case("cxx_unicode_literals", LangOpts.CPlusPlus0x) - .Case("cxx_unrestricted_unions", LangOpts.CPlusPlus0x) - .Case("cxx_user_literals", LangOpts.CPlusPlus0x) - .Case("cxx_variadic_templates", LangOpts.CPlusPlus0x) - // Type traits - .Case("has_nothrow_assign", LangOpts.CPlusPlus) - .Case("has_nothrow_copy", LangOpts.CPlusPlus) - .Case("has_nothrow_constructor", LangOpts.CPlusPlus) - .Case("has_trivial_assign", LangOpts.CPlusPlus) - .Case("has_trivial_copy", LangOpts.CPlusPlus) - .Case("has_trivial_constructor", LangOpts.CPlusPlus) - .Case("has_trivial_destructor", LangOpts.CPlusPlus) - .Case("has_virtual_destructor", LangOpts.CPlusPlus) - .Case("is_abstract", LangOpts.CPlusPlus) - .Case("is_base_of", LangOpts.CPlusPlus) - .Case("is_class", LangOpts.CPlusPlus) - .Case("is_convertible_to", LangOpts.CPlusPlus) - // __is_empty is available only if the horrible - // "struct __is_empty" parsing hack hasn't been needed in this - // translation unit. If it has, __is_empty reverts to a normal - // identifier and __has_feature(is_empty) evaluates false. - .Case("is_empty", LangOpts.CPlusPlus) - .Case("is_enum", LangOpts.CPlusPlus) - .Case("is_final", LangOpts.CPlusPlus) - .Case("is_literal", LangOpts.CPlusPlus) - .Case("is_standard_layout", LangOpts.CPlusPlus) - .Case("is_pod", LangOpts.CPlusPlus) - .Case("is_polymorphic", LangOpts.CPlusPlus) - .Case("is_trivial", LangOpts.CPlusPlus) - .Case("is_trivially_assignable", LangOpts.CPlusPlus) - .Case("is_trivially_constructible", LangOpts.CPlusPlus) - .Case("is_trivially_copyable", LangOpts.CPlusPlus) - .Case("is_union", LangOpts.CPlusPlus) - .Case("modules", LangOpts.Modules) - .Case("tls", PP.getTargetInfo().isTLSSupported()) - .Case("underlying_type", LangOpts.CPlusPlus) - .Default(false); -} - -/// HasExtension - Return true if we recognize and implement the feature -/// specified by the identifier, either as an extension or a standard language -/// feature. -static bool HasExtension(const Preprocessor &PP, const IdentifierInfo *II) { - if (HasFeature(PP, II)) - return true; - - // If the use of an extension results in an error diagnostic, extensions are - // effectively unavailable, so just return false here. - if (PP.getDiagnostics().getExtensionHandlingBehavior() == - DiagnosticsEngine::Ext_Error) - return false; - - const LangOptions &LangOpts = PP.getLangOpts(); - StringRef Extension = II->getName(); - - // Normalize the extension name, __foo__ becomes foo. - if (Extension.startswith("__") && Extension.endswith("__") && - Extension.size() >= 4) - Extension = Extension.substr(2, Extension.size() - 4); - - // Because we inherit the feature list from HasFeature, this string switch - // must be less restrictive than HasFeature's. - return llvm::StringSwitch<bool>(Extension) - // C11 features supported by other languages as extensions. - .Case("c_alignas", true) - .Case("c_atomic", true) - .Case("c_generic_selections", true) - .Case("c_static_assert", true) - // C++0x features supported by other languages as extensions. - .Case("cxx_atomic", LangOpts.CPlusPlus) - .Case("cxx_deleted_functions", LangOpts.CPlusPlus) - .Case("cxx_explicit_conversions", LangOpts.CPlusPlus) - .Case("cxx_inline_namespaces", LangOpts.CPlusPlus) - .Case("cxx_local_type_template_args", LangOpts.CPlusPlus) - .Case("cxx_nonstatic_member_init", LangOpts.CPlusPlus) - .Case("cxx_override_control", LangOpts.CPlusPlus) - .Case("cxx_range_for", LangOpts.CPlusPlus) - .Case("cxx_reference_qualified_functions", LangOpts.CPlusPlus) - .Case("cxx_rvalue_references", LangOpts.CPlusPlus) - .Default(false); -} - -/// HasAttribute - Return true if we recognize and implement the attribute -/// specified by the given identifier. -static bool HasAttribute(const IdentifierInfo *II) { - StringRef Name = II->getName(); - // Normalize the attribute name, __foo__ becomes foo. - if (Name.startswith("__") && Name.endswith("__") && Name.size() >= 4) - Name = Name.substr(2, Name.size() - 4); - - // FIXME: Do we need to handle namespaces here? - return llvm::StringSwitch<bool>(Name) -#include "clang/Lex/AttrSpellings.inc" - .Default(false); -} - -/// EvaluateHasIncludeCommon - Process a '__has_include("path")' -/// or '__has_include_next("path")' expression. -/// Returns true if successful. -static bool EvaluateHasIncludeCommon(Token &Tok, - IdentifierInfo *II, Preprocessor &PP, - const DirectoryLookup *LookupFrom) { - SourceLocation LParenLoc; - - // Get '('. - PP.LexNonComment(Tok); - - // Ensure we have a '('. - if (Tok.isNot(tok::l_paren)) { - PP.Diag(Tok.getLocation(), diag::err_pp_missing_lparen) << II->getName(); - return false; - } - - // Save '(' location for possible missing ')' message. - LParenLoc = Tok.getLocation(); - - // Get the file name. - PP.getCurrentLexer()->LexIncludeFilename(Tok); - - // Reserve a buffer to get the spelling. - SmallString<128> FilenameBuffer; - StringRef Filename; - SourceLocation EndLoc; - - switch (Tok.getKind()) { - case tok::eod: - // If the token kind is EOD, the error has already been diagnosed. - return false; - - case tok::angle_string_literal: - case tok::string_literal: { - bool Invalid = false; - Filename = PP.getSpelling(Tok, FilenameBuffer, &Invalid); - if (Invalid) - return false; - break; - } - - case tok::less: - // This could be a <foo/bar.h> file coming from a macro expansion. In this - // case, glue the tokens together into FilenameBuffer and interpret those. - FilenameBuffer.push_back('<'); - if (PP.ConcatenateIncludeName(FilenameBuffer, EndLoc)) - return false; // Found <eod> but no ">"? Diagnostic already emitted. - Filename = FilenameBuffer.str(); - break; - default: - PP.Diag(Tok.getLocation(), diag::err_pp_expects_filename); - return false; - } - - // Get ')'. - PP.LexNonComment(Tok); - - // Ensure we have a trailing ). - if (Tok.isNot(tok::r_paren)) { - PP.Diag(Tok.getLocation(), diag::err_pp_missing_rparen) << II->getName(); - PP.Diag(LParenLoc, diag::note_matching) << "("; - return false; - } - - bool isAngled = PP.GetIncludeFilenameSpelling(Tok.getLocation(), Filename); - // If GetIncludeFilenameSpelling set the start ptr to null, there was an - // error. - if (Filename.empty()) - return false; - - // Search include directories. - const DirectoryLookup *CurDir; - const FileEntry *File = - PP.LookupFile(Filename, isAngled, LookupFrom, CurDir, NULL, NULL, NULL); - - // Get the result value. A result of true means the file exists. - return File != 0; -} - -/// EvaluateHasInclude - Process a '__has_include("path")' expression. -/// Returns true if successful. -static bool EvaluateHasInclude(Token &Tok, IdentifierInfo *II, - Preprocessor &PP) { - return EvaluateHasIncludeCommon(Tok, II, PP, NULL); -} - -/// EvaluateHasIncludeN |