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+//===--- Preprocess.cpp - C Language Family Preprocessor Implementation ---===//
+//
+// 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 Preprocessor interface.
+//
+//===----------------------------------------------------------------------===//
+//
+// Options to support:
+// -H - Print the name of each header file used.
+// -d[DNI] - Dump various things.
+// -fworking-directory - #line's with preprocessor's working dir.
+// -fpreprocessed
+// -dependency-file,-M,-MM,-MF,-MG,-MP,-MT,-MQ,-MD,-MMD
+// -W*
+// -w
+//
+// Messages to emit:
+// "Multiple include guards may be useful for:\n"
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Lex/Preprocessor.h"
+#include "MacroArgs.h"
+#include "clang/Lex/ExternalPreprocessorSource.h"
+#include "clang/Lex/HeaderSearch.h"
+#include "clang/Lex/MacroInfo.h"
+#include "clang/Lex/Pragma.h"
+#include "clang/Lex/PreprocessingRecord.h"
+#include "clang/Lex/ScratchBuffer.h"
+#include "clang/Lex/LexDiagnostic.h"
+#include "clang/Lex/CodeCompletionHandler.h"
+#include "clang/Lex/ModuleLoader.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/TargetInfo.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/Capacity.h"
+using namespace clang;
+
+//===----------------------------------------------------------------------===//
+ExternalPreprocessorSource::~ExternalPreprocessorSource() { }
+
+Preprocessor::Preprocessor(DiagnosticsEngine &diags, LangOptions &opts,
+ const TargetInfo *target, SourceManager &SM,
+ HeaderSearch &Headers, ModuleLoader &TheModuleLoader,
+ IdentifierInfoLookup* IILookup,
+ bool OwnsHeaders,
+ bool DelayInitialization,
+ bool IncrProcessing)
+ : Diags(&diags), LangOpts(opts), Target(target),FileMgr(Headers.getFileMgr()),
+ SourceMgr(SM), HeaderInfo(Headers), TheModuleLoader(TheModuleLoader),
+ ExternalSource(0), Identifiers(opts, IILookup),
+ IncrementalProcessing(IncrProcessing), CodeComplete(0),
+ CodeCompletionFile(0), CodeCompletionOffset(0), CodeCompletionReached(0),
+ SkipMainFilePreamble(0, true), CurPPLexer(0),
+ CurDirLookup(0), CurLexerKind(CLK_Lexer), Callbacks(0), MacroArgCache(0),
+ Record(0), MIChainHead(0), MICache(0)
+{
+ OwnsHeaderSearch = OwnsHeaders;
+
+ if (!DelayInitialization) {
+ assert(Target && "Must provide target information for PP initialization");
+ Initialize(*Target);
+ }
+}
+
+Preprocessor::~Preprocessor() {
+ assert(BacktrackPositions.empty() && "EnableBacktrack/Backtrack imbalance!");
+
+ while (!IncludeMacroStack.empty()) {
+ delete IncludeMacroStack.back().TheLexer;
+ delete IncludeMacroStack.back().TheTokenLexer;
+ IncludeMacroStack.pop_back();
+ }
+
+ // Free any macro definitions.
+ for (MacroInfoChain *I = MIChainHead ; I ; I = I->Next)
+ I->MI.Destroy();
+
+ // Free any cached macro expanders.
+ for (unsigned i = 0, e = NumCachedTokenLexers; i != e; ++i)
+ delete TokenLexerCache[i];
+
+ // Free any cached MacroArgs.
+ for (MacroArgs *ArgList = MacroArgCache; ArgList; )
+ ArgList = ArgList->deallocate();
+
+ // Release pragma information.
+ delete PragmaHandlers;
+
+ // Delete the scratch buffer info.
+ delete ScratchBuf;
+
+ // Delete the header search info, if we own it.
+ if (OwnsHeaderSearch)
+ delete &HeaderInfo;
+
+ delete Callbacks;
+}
+
+void Preprocessor::Initialize(const TargetInfo &Target) {
+ assert((!this->Target || this->Target == &Target) &&
+ "Invalid override of target information");
+ this->Target = &Target;
+
+ // Initialize information about built-ins.
+ BuiltinInfo.InitializeTarget(Target);
+
+ ScratchBuf = new ScratchBuffer(SourceMgr);
+ CounterValue = 0; // __COUNTER__ starts at 0.
+
+ // Clear stats.
+ NumDirectives = NumDefined = NumUndefined = NumPragma = 0;
+ NumIf = NumElse = NumEndif = 0;
+ NumEnteredSourceFiles = 0;
+ NumMacroExpanded = NumFnMacroExpanded = NumBuiltinMacroExpanded = 0;
+ NumFastMacroExpanded = NumTokenPaste = NumFastTokenPaste = 0;
+ MaxIncludeStackDepth = 0;
+ NumSkipped = 0;
+
+ // Default to discarding comments.
+ KeepComments = false;
+ KeepMacroComments = false;
+ SuppressIncludeNotFoundError = false;
+
+ // Macro expansion is enabled.
+ DisableMacroExpansion = false;
+ InMacroArgs = false;
+ InMacroArgPreExpansion = false;
+ NumCachedTokenLexers = 0;
+
+ CachedLexPos = 0;
+
+ // We haven't read anything from the external source.
+ ReadMacrosFromExternalSource = false;
+
+ // "Poison" __VA_ARGS__, which can only appear in the expansion of a macro.
+ // This gets unpoisoned where it is allowed.
+ (Ident__VA_ARGS__ = getIdentifierInfo("__VA_ARGS__"))->setIsPoisoned();
+ SetPoisonReason(Ident__VA_ARGS__,diag::ext_pp_bad_vaargs_use);
+
+ // Initialize the pragma handlers.
+ PragmaHandlers = new PragmaNamespace(StringRef());
+ RegisterBuiltinPragmas();
+
+ // Initialize builtin macros like __LINE__ and friends.
+ RegisterBuiltinMacros();
+
+ if(LangOpts.Borland) {
+ Ident__exception_info = getIdentifierInfo("_exception_info");
+ Ident___exception_info = getIdentifierInfo("__exception_info");
+ Ident_GetExceptionInfo = getIdentifierInfo("GetExceptionInformation");
+ Ident__exception_code = getIdentifierInfo("_exception_code");
+ Ident___exception_code = getIdentifierInfo("__exception_code");
+ Ident_GetExceptionCode = getIdentifierInfo("GetExceptionCode");
+ Ident__abnormal_termination = getIdentifierInfo("_abnormal_termination");
+ Ident___abnormal_termination = getIdentifierInfo("__abnormal_termination");
+ Ident_AbnormalTermination = getIdentifierInfo("AbnormalTermination");
+ } else {
+ Ident__exception_info = Ident__exception_code = Ident__abnormal_termination = 0;
+ Ident___exception_info = Ident___exception_code = Ident___abnormal_termination = 0;
+ Ident_GetExceptionInfo = Ident_GetExceptionCode = Ident_AbnormalTermination = 0;
+ }
+
+ HeaderInfo.setTarget(Target);
+}
+
+void Preprocessor::setPTHManager(PTHManager* pm) {
+ PTH.reset(pm);
+ FileMgr.addStatCache(PTH->createStatCache());
+}
+
+void Preprocessor::DumpToken(const Token &Tok, bool DumpFlags) const {
+ llvm::errs() << tok::getTokenName(Tok.getKind()) << " '"
+ << getSpelling(Tok) << "'";
+
+ if (!DumpFlags) return;
+
+ llvm::errs() << "\t";
+ if (Tok.isAtStartOfLine())
+ llvm::errs() << " [StartOfLine]";
+ if (Tok.hasLeadingSpace())
+ llvm::errs() << " [LeadingSpace]";
+ if (Tok.isExpandDisabled())
+ llvm::errs() << " [ExpandDisabled]";
+ if (Tok.needsCleaning()) {
+ const char *Start = SourceMgr.getCharacterData(Tok.getLocation());
+ llvm::errs() << " [UnClean='" << StringRef(Start, Tok.getLength())
+ << "']";
+ }
+
+ llvm::errs() << "\tLoc=<";
+ DumpLocation(Tok.getLocation());
+ llvm::errs() << ">";
+}
+
+void Preprocessor::DumpLocation(SourceLocation Loc) const {
+ Loc.dump(SourceMgr);
+}
+
+void Preprocessor::DumpMacro(const MacroInfo &MI) const {
+ llvm::errs() << "MACRO: ";
+ for (unsigned i = 0, e = MI.getNumTokens(); i != e; ++i) {
+ DumpToken(MI.getReplacementToken(i));
+ llvm::errs() << " ";
+ }
+ llvm::errs() << "\n";
+}
+
+void Preprocessor::PrintStats() {
+ llvm::errs() << "\n*** Preprocessor Stats:\n";
+ llvm::errs() << NumDirectives << " directives found:\n";
+ llvm::errs() << " " << NumDefined << " #define.\n";
+ llvm::errs() << " " << NumUndefined << " #undef.\n";
+ llvm::errs() << " #include/#include_next/#import:\n";
+ llvm::errs() << " " << NumEnteredSourceFiles << " source files entered.\n";
+ llvm::errs() << " " << MaxIncludeStackDepth << " max include stack depth\n";
+ llvm::errs() << " " << NumIf << " #if/#ifndef/#ifdef.\n";
+ llvm::errs() << " " << NumElse << " #else/#elif.\n";
+ llvm::errs() << " " << NumEndif << " #endif.\n";
+ llvm::errs() << " " << NumPragma << " #pragma.\n";
+ llvm::errs() << NumSkipped << " #if/#ifndef#ifdef regions skipped\n";
+
+ llvm::errs() << NumMacroExpanded << "/" << NumFnMacroExpanded << "/"
+ << NumBuiltinMacroExpanded << " obj/fn/builtin macros expanded, "
+ << NumFastMacroExpanded << " on the fast path.\n";
+ llvm::errs() << (NumFastTokenPaste+NumTokenPaste)
+ << " token paste (##) operations performed, "
+ << NumFastTokenPaste << " on the fast path.\n";
+}
+
+Preprocessor::macro_iterator
+Preprocessor::macro_begin(bool IncludeExternalMacros) const {
+ if (IncludeExternalMacros && ExternalSource &&
+ !ReadMacrosFromExternalSource) {
+ ReadMacrosFromExternalSource = true;
+ ExternalSource->ReadDefinedMacros();
+ }
+
+ return Macros.begin();
+}
+
+size_t Preprocessor::getTotalMemory() const {
+ return BP.getTotalMemory()
+ + llvm::capacity_in_bytes(MacroExpandedTokens)
+ + Predefines.capacity() /* Predefines buffer. */
+ + llvm::capacity_in_bytes(Macros)
+ + llvm::capacity_in_bytes(PragmaPushMacroInfo)
+ + llvm::capacity_in_bytes(PoisonReasons)
+ + llvm::capacity_in_bytes(CommentHandlers);
+}
+
+Preprocessor::macro_iterator
+Preprocessor::macro_end(bool IncludeExternalMacros) const {
+ if (IncludeExternalMacros && ExternalSource &&
+ !ReadMacrosFromExternalSource) {
+ ReadMacrosFromExternalSource = true;
+ ExternalSource->ReadDefinedMacros();
+ }
+
+ return Macros.end();
+}
+
+void Preprocessor::recomputeCurLexerKind() {
+ if (CurLexer)
+ CurLexerKind = CLK_Lexer;
+ else if (CurPTHLexer)
+ CurLexerKind = CLK_PTHLexer;
+ else if (CurTokenLexer)
+ CurLexerKind = CLK_TokenLexer;
+ else
+ CurLexerKind = CLK_CachingLexer;
+}
+
+bool Preprocessor::SetCodeCompletionPoint(const FileEntry *File,
+ unsigned CompleteLine,
+ unsigned CompleteColumn) {
+ assert(File);
+ assert(CompleteLine && CompleteColumn && "Starts from 1:1");
+ assert(!CodeCompletionFile && "Already set");
+
+ using llvm::MemoryBuffer;
+
+ // Load the actual file's contents.
+ bool Invalid = false;
+ const MemoryBuffer *Buffer = SourceMgr.getMemoryBufferForFile(File, &Invalid);
+ if (Invalid)
+ return true;
+
+ // Find the byte position of the truncation point.
+ const char *Position = Buffer->getBufferStart();
+ for (unsigned Line = 1; Line < CompleteLine; ++Line) {
+ for (; *Position; ++Position) {
+ if (*Position != '\r' && *Position != '\n')
+ continue;
+
+ // Eat \r\n or \n\r as a single line.
+ if ((Position[1] == '\r' || Position[1] == '\n') &&
+ Position[0] != Position[1])
+ ++Position;
+ ++Position;
+ break;
+ }
+ }
+
+ Position += CompleteColumn - 1;
+
+ // Insert '\0' at the code-completion point.
+ if (Position < Buffer->getBufferEnd()) {
+ CodeCompletionFile = File;
+ CodeCompletionOffset = Position - Buffer->getBufferStart();
+
+ MemoryBuffer *NewBuffer =
+ MemoryBuffer::getNewUninitMemBuffer(Buffer->getBufferSize() + 1,
+ Buffer->getBufferIdentifier());
+ char *NewBuf = const_cast<char*>(NewBuffer->getBufferStart());
+ char *NewPos = std::copy(Buffer->getBufferStart(), Position, NewBuf);
+ *NewPos = '\0';
+ std::copy(Position, Buffer->getBufferEnd(), NewPos+1);
+ SourceMgr.overrideFileContents(File, NewBuffer);
+ }
+
+ return false;
+}
+
+void Preprocessor::CodeCompleteNaturalLanguage() {
+ if (CodeComplete)
+ CodeComplete->CodeCompleteNaturalLanguage();
+ setCodeCompletionReached();
+}
+
+/// getSpelling - This method is used to get the spelling of a token into a
+/// SmallVector. Note that the returned StringRef may not point to the
+/// supplied buffer if a copy can be avoided.
+StringRef Preprocessor::getSpelling(const Token &Tok,
+ SmallVectorImpl<char> &Buffer,
+ bool *Invalid) const {
+ // NOTE: this has to be checked *before* testing for an IdentifierInfo.
+ if (Tok.isNot(tok::raw_identifier)) {
+ // Try the fast path.
+ if (const IdentifierInfo *II = Tok.getIdentifierInfo())
+ return II->getName();
+ }
+
+ // Resize the buffer if we need to copy into it.
+ if (Tok.needsCleaning())
+ Buffer.resize(Tok.getLength());
+
+ const char *Ptr = Buffer.data();
+ unsigned Len = getSpelling(Tok, Ptr, Invalid);
+ return StringRef(Ptr, Len);
+}
+
+/// CreateString - Plop the specified string into a scratch buffer and return a
+/// location for it. If specified, the source location provides a source
+/// location for the token.
+void Preprocessor::CreateString(const char *Buf, unsigned Len, Token &Tok,
+ SourceLocation ExpansionLocStart,
+ SourceLocation ExpansionLocEnd) {
+ Tok.setLength(Len);
+
+ const char *DestPtr;
+ SourceLocation Loc = ScratchBuf->getToken(Buf, Len, DestPtr);
+
+ if (ExpansionLocStart.isValid())
+ Loc = SourceMgr.createExpansionLoc(Loc, ExpansionLocStart,
+ ExpansionLocEnd, Len);
+ Tok.setLocation(Loc);
+
+ // If this is a raw identifier or a literal token, set the pointer data.
+ if (Tok.is(tok::raw_identifier))
+ Tok.setRawIdentifierData(DestPtr);
+ else if (Tok.isLiteral())
+ Tok.setLiteralData(DestPtr);
+}
+
+Module *Preprocessor::getCurrentModule() {
+ if (getLangOpts().CurrentModule.empty())
+ return 0;
+
+ return getHeaderSearchInfo().lookupModule(getLangOpts().CurrentModule);
+}
+
+//===----------------------------------------------------------------------===//
+// Preprocessor Initialization Methods
+//===----------------------------------------------------------------------===//
+
+
+/// EnterMainSourceFile - Enter the specified FileID as the main source file,
+/// which implicitly adds the builtin defines etc.
+void Preprocessor::EnterMainSourceFile() {
+ // We do not allow the preprocessor to reenter the main file. Doing so will
+ // cause FileID's to accumulate information from both runs (e.g. #line
+ // information) and predefined macros aren't guaranteed to be set properly.
+ assert(NumEnteredSourceFiles == 0 && "Cannot reenter the main file!");
+ FileID MainFileID = SourceMgr.getMainFileID();
+
+ // If MainFileID is loaded it means we loaded an AST file, no need to enter
+ // a main file.
+ if (!SourceMgr.isLoadedFileID(MainFileID)) {
+ // Enter the main file source buffer.
+ EnterSourceFile(MainFileID, 0, SourceLocation());
+
+ // If we've been asked to skip bytes in the main file (e.g., as part of a
+ // precompiled preamble), do so now.
+ if (SkipMainFilePreamble.first > 0)
+ CurLexer->SkipBytes(SkipMainFilePreamble.first,
+ SkipMainFilePreamble.second);
+
+ // Tell the header info that the main file was entered. If the file is later
+ // #imported, it won't be re-entered.
+ if (const FileEntry *FE = SourceMgr.getFileEntryForID(MainFileID))
+ HeaderInfo.IncrementIncludeCount(FE);
+ }
+
+ // Preprocess Predefines to populate the initial preprocessor state.
+ llvm::MemoryBuffer *SB =
+ llvm::MemoryBuffer::getMemBufferCopy(Predefines, "<built-in>");
+ assert(SB && "Cannot create predefined source buffer");
+ FileID FID = SourceMgr.createFileIDForMemBuffer(SB);
+ assert(!FID.isInvalid() && "Could not create FileID for predefines?");
+
+ // Start parsing the predefines.
+ EnterSourceFile(FID, 0, SourceLocation());
+}
+
+void Preprocessor::EndSourceFile() {
+ // Notify the client that we reached the end of the source file.
+ if (Callbacks)
+ Callbacks->EndOfMainFile();
+}
+
+//===----------------------------------------------------------------------===//
+// Lexer Event Handling.
+//===----------------------------------------------------------------------===//
+
+/// LookUpIdentifierInfo - Given a tok::raw_identifier token, look up the
+/// identifier information for the token and install it into the token,
+/// updating the token kind accordingly.
+IdentifierInfo *Preprocessor::LookUpIdentifierInfo(Token &Identifier) const {
+ assert(Identifier.getRawIdentifierData() != 0 && "No raw identifier data!");
+
+ // Look up this token, see if it is a macro, or if it is a language keyword.
+ IdentifierInfo *II;
+ if (!Identifier.needsCleaning()) {
+ // No cleaning needed, just use the characters from the lexed buffer.
+ II = getIdentifierInfo(StringRef(Identifier.getRawIdentifierData(),
+ Identifier.getLength()));
+ } else {
+ // Cleaning needed, alloca a buffer, clean into it, then use the buffer.
+ SmallString<64> IdentifierBuffer;
+ StringRef CleanedStr = getSpelling(Identifier, IdentifierBuffer);
+ II = getIdentifierInfo(CleanedStr);
+ }
+
+ // Update the token info (identifier info and appropriate token kind).
+ Identifier.setIdentifierInfo(II);
+ Identifier.setKind(II->getTokenID());
+
+ return II;
+}
+
+void Preprocessor::SetPoisonReason(IdentifierInfo *II, unsigned DiagID) {
+ PoisonReasons[II] = DiagID;
+}
+
+void Preprocessor::PoisonSEHIdentifiers(bool Poison) {
+ assert(Ident__exception_code && Ident__exception_info);
+ assert(Ident___exception_code && Ident___exception_info);
+ Ident__exception_code->setIsPoisoned(Poison);
+ Ident___exception_code->setIsPoisoned(Poison);
+ Ident_GetExceptionCode->setIsPoisoned(Poison);
+ Ident__exception_info->setIsPoisoned(Poison);
+ Ident___exception_info->setIsPoisoned(Poison);
+ Ident_GetExceptionInfo->setIsPoisoned(Poison);
+ Ident__abnormal_termination->setIsPoisoned(Poison);
+ Ident___abnormal_termination->setIsPoisoned(Poison);
+ Ident_AbnormalTermination->setIsPoisoned(Poison);
+}
+
+void Preprocessor::HandlePoisonedIdentifier(Token & Identifier) {
+ assert(Identifier.getIdentifierInfo() &&
+ "Can't handle identifiers without identifier info!");
+ llvm::DenseMap<IdentifierInfo*,unsigned>::const_iterator it =
+ PoisonReasons.find(Identifier.getIdentifierInfo());
+ if(it == PoisonReasons.end())
+ Diag(Identifier, diag::err_pp_used_poisoned_id);
+ else
+ Diag(Identifier,it->second) << Identifier.getIdentifierInfo();
+}
+
+/// HandleIdentifier - This callback is invoked when the lexer reads an
+/// identifier. This callback looks up the identifier in the map and/or
+/// potentially macro expands it or turns it into a named token (like 'for').
+///
+/// Note that callers of this method are guarded by checking the
+/// IdentifierInfo's 'isHandleIdentifierCase' bit. If this method changes, the
+/// IdentifierInfo methods that compute these properties will need to change to
+/// match.
+void Preprocessor::HandleIdentifier(Token &Identifier) {
+ assert(Identifier.getIdentifierInfo() &&
+ "Can't handle identifiers without identifier info!");
+
+ IdentifierInfo &II = *Identifier.getIdentifierInfo();
+
+ // If the information about this identifier is out of date, update it from
+ // the external source.
+ if (II.isOutOfDate()) {
+ ExternalSource->updateOutOfDateIdentifier(II);
+ Identifier.setKind(II.getTokenID());
+ }
+
+ // If this identifier was poisoned, and if it was not produced from a macro
+ // expansion, emit an error.
+ if (II.isPoisoned() && CurPPLexer) {
+ HandlePoisonedIdentifier(Identifier);
+ }
+
+ // If this is a macro to be expanded, do it.
+ if (MacroInfo *MI = getMacroInfo(&II)) {
+ if (!DisableMacroExpansion) {
+ if (Identifier.isExpandDisabled()) {
+ Diag(Identifier, diag::pp_disabled_macro_expansion);
+ } else if (MI->isEnabled()) {
+ if (!HandleMacroExpandedIdentifier(Identifier, MI))
+ return;
+ } else {
+ // C99 6.10.3.4p2 says that a disabled macro may never again be
+ // expanded, even if it's in a context where it could be expanded in the
+ // future.
+ Identifier.setFlag(Token::DisableExpand);
+ Diag(Identifier, diag::pp_disabled_macro_expansion);
+ }
+ }
+ }
+
+ // If this identifier is a keyword in C++11, produce a warning. Don't warn if
+ // we're not considering macro expansion, since this identifier might be the
+ // name of a macro.
+ // FIXME: This warning is disabled in cases where it shouldn't be, like
+ // "#define constexpr constexpr", "int constexpr;"
+ if (II.isCXX11CompatKeyword() & !DisableMacroExpansion) {
+ Diag(Identifier, diag::warn_cxx11_keyword) << II.getName();
+ // Don't diagnose this keyword again in this translation unit.
+ II.setIsCXX11CompatKeyword(false);
+ }
+
+ // C++ 2.11p2: If this is an alternative representation of a C++ operator,
+ // then we act as if it is the actual operator and not the textual
+ // representation of it.
+ if (II.isCPlusPlusOperatorKeyword())
+ Identifier.setIdentifierInfo(0);
+
+ // If this is an extension token, diagnose its use.
+ // We avoid diagnosing tokens that originate from macro definitions.
+ // FIXME: This warning is disabled in cases where it shouldn't be,
+ // like "#define TY typeof", "TY(1) x".
+ if (II.isExtensionToken() && !DisableMacroExpansion)
+ Diag(Identifier, diag::ext_token_used);
+
+ // If this is the '__experimental_modules_import' contextual keyword, note
+ // that the next token indicates a module name.
+ //
+ // Note that we do not treat '__experimental_modules_import' as a contextual
+ // keyword when we're in a caching lexer, because caching lexers only get
+ // used in contexts where import declarations are disallowed.
+ if (II.isModulesImport() && !InMacroArgs && !DisableMacroExpansion &&
+ getLangOpts().Modules && CurLexerKind != CLK_CachingLexer) {
+ ModuleImportLoc = Identifier.getLocation();
+ ModuleImportPath.clear();
+ ModuleImportExpectsIdentifier = true;
+ CurLexerKind = CLK_LexAfterModuleImport;
+ }
+}
+
+/// \brief Lex a token following the 'import' contextual keyword.
+///
+void Preprocessor::LexAfterModuleImport(Token &Result) {
+ // Figure out what kind of lexer we actually have.
+ recomputeCurLexerKind();
+
+ // Lex the next token.
+ Lex(Result);
+
+ // The token sequence
+ //
+ // import identifier (. identifier)*
+ //
+ // indicates a module import directive. We already saw the 'import'
+ // contextual keyword, so now we're looking for the identifiers.
+ if (ModuleImportExpectsIdentifier && Result.getKind() == tok::identifier) {
+ // We expected to see an identifier here, and we did; continue handling
+ // identifiers.
+ ModuleImportPath.push_back(std::make_pair(Result.getIdentifierInfo(),
+ Result.getLocation()));
+ ModuleImportExpectsIdentifier = false;
+ CurLexerKind = CLK_LexAfterModuleImport;
+ return;
+ }
+
+ // If we're expecting a '.' or a ';', and we got a '.', then wait until we
+ // see the next identifier.
+ if (!ModuleImportExpectsIdentifier && Result.getKind() == tok::period) {
+ ModuleImportExpectsIdentifier = true;
+ CurLexerKind = CLK_LexAfterModuleImport;
+ return;
+ }
+
+ // If we have a non-empty module path, load the named module.
+ if (!ModuleImportPath.empty())
+ (void)TheModuleLoader.loadModule(ModuleImportLoc, ModuleImportPath,
+ Module::MacrosVisible,
+ /*IsIncludeDirective=*/false);
+}
+
+void Preprocessor::AddCommentHandler(CommentHandler *Handler) {
+ assert(Handler && "NULL comment handler");
+ assert(std::find(CommentHandlers.begin(), CommentHandlers.end(), Handler) ==
+ CommentHandlers.end() && "Comment handler already registered");
+ CommentHandlers.push_back(Handler);
+}
+
+void Preprocessor::RemoveCommentHandler(CommentHandler *Handler) {
+ std::vector<CommentHandler *>::iterator Pos
+ = std::find(CommentHandlers.begin(), CommentHandlers.end(), Handler);
+ assert(Pos != CommentHandlers.end() && "Comment handler not registered");
+ CommentHandlers.erase(Pos);
+}
+
+bool Preprocessor::HandleComment(Token &result, SourceRange Comment) {
+ bool AnyPendingTokens = false;
+ for (std::vector<CommentHandler *>::iterator H = CommentHandlers.begin(),
+ HEnd = CommentHandlers.end();
+ H != HEnd; ++H) {
+ if ((*H)->HandleComment(*this, Comment))
+ AnyPendingTokens = true;
+ }
+ if (!AnyPendingTokens || getCommentRetentionState())
+ return false;
+ Lex(result);
+ return true;
+}
+
+ModuleLoader::~ModuleLoader() { }
+
+CommentHandler::~CommentHandler() { }
+
+CodeCompletionHandler::~CodeCompletionHandler() { }
+
+void Preprocessor::createPreprocessingRecord(bool RecordConditionalDirectives) {
+ if (Record)
+ return;
+
+ Record = new PreprocessingRecord(getSourceManager(),
+ RecordConditionalDirectives);
+ addPPCallbacks(Record);
+}