Preprocessor.h revision 9e0ed0bd5a3a7bac73973980ff32132a7724e674
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- Preprocessor.h - C Language Family Preprocessor --------*- C++ -*-===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file defines the Preprocessor interface. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#ifndef LLVM_CLANG_LEX_PREPROCESSOR_H 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#define LLVM_CLANG_LEX_PREPROCESSOR_H 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/Lexer.h" 18eb50ed88c2aa040fac08bf2a50bde4dd3da6eb19Chris Lattner#include "clang/Lex/PPCallbacks.h" 195d75de0f821023f4ed4815825bf3aea8a0b5e40dChris Lattner#include "clang/Lex/TokenLexer.h" 20c7229c338c21ef26b01ef3ecf9eec4fd373fa9ecChris Lattner#include "clang/Basic/IdentifierTable.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/SourceLocation.h" 22cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner#include "llvm/ADT/DenseMap.h" 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencernamespace clang { 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass SourceManager; 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass FileManager; 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass FileEntry; 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass HeaderSearch; 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass PragmaNamespace; 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass PragmaHandler; 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass ScratchBuffer; 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass TargetInfo; 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass PPCallbacks; 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass DirectoryLookup; 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 37e5956bd2730c051835f9acd9e957c5d79f99e7c3Chris Lattner/// Preprocessor - This object engages in a tight little dance with the lexer to 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// efficiently preprocess tokens. Lexers know only about tokens within a 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// single source file, and don't know anything about preprocessor-level issues 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// like the #include stack, token expansion, etc. 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerclass Preprocessor { 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diagnostic &Diags; 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const LangOptions &Features; 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer TargetInfo &Target; 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer FileManager &FileMgr; 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceManager &SourceMgr; 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ScratchBuffer *ScratchBuf; 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HeaderSearch &HeaderInfo; 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// Identifiers for builtin macros and other builtins. 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *Ident__LINE__, *Ident__FILE__; // __LINE__, __FILE__ 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *Ident__DATE__, *Ident__TIME__; // __DATE__, __TIME__ 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *Ident__INCLUDE_LEVEL__; // __INCLUDE_LEVEL__ 555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *Ident__BASE_FILE__; // __BASE_FILE__ 565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *Ident__TIMESTAMP__; // __TIMESTAMP__ 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *Ident_Pragma, *Ident__VA_ARGS__; // _Pragma, __VA_ARGS__ 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation DATELoc, TIMELoc; 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer enum { 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// MaxIncludeStackDepth - Maximum depth of #includes. 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer MaxAllowedIncludeStackDepth = 200 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer }; 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // State that is set before the preprocessor begins. 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool KeepComments : 1; 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool KeepMacroComments : 1; 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // State that changes while the preprocessor runs: 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool DisableMacroExpansion : 1; // True if macro expansion is disabled. 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool InMacroArgs : 1; // True if parsing fn macro invocation args. 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// Identifiers - This is mapping/lookup information for all identifiers in 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// the program, including program keywords. 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierTable Identifiers; 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7868d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff /// Selectors - This table contains all the selectors in the program. Unlike 7968d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff /// IdentifierTable above, this table *isn't* populated by the preprocessor. 8068d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff /// It is declared/instantiated here because it's role/lifetime is 8168d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff /// conceptually similar the IdentifierTable. In addition, the current control 8268d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff /// flow (in clang::ParseAST()), make it convenient to put here. 8368d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff /// FIXME: Make sure the lifetime of Identifiers/Selectors *isn't* tied to 8468d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff /// the lifetime fo the preprocessor. 8529238a0bf7cbf5b396efb451a0adb5fe4aa037caSteve Naroff SelectorTable Selectors; 8668d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// PragmaHandlers - This tracks all of the pragmas that the client registered 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// with this preprocessor. 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PragmaNamespace *PragmaHandlers; 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// CurLexer - This is the current top of the stack that we're lexing from if 926cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner /// not expanding a macro. One of CurLexer and CurTokenLexer must be null. 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lexer *CurLexer; 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// CurLookup - The DirectoryLookup structure used to find the current 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// FileEntry, if CurLexer is non-null and if applicable. This allows us to 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// implement #include_next and find directory-specific properties. 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DirectoryLookup *CurDirLookup; 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1006cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner /// CurTokenLexer - This is the current macro we are expanding, if we are 1016cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner /// expanding a macro. One of CurLexer and CurTokenLexer must be null. 1026cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner TokenLexer *CurTokenLexer; 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// IncludeMacroStack - This keeps track of the stack of files currently 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// #included, and macros currently being expanded from, not counting 1066cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner /// CurLexer/CurTokenLexer. 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer struct IncludeStackInfo { 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lexer *TheLexer; 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DirectoryLookup *TheDirLookup; 1106cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner TokenLexer *TheTokenLexer; 1111543e9c69202b8e128c7fe34784ae7aa90964889Chris Lattner IncludeStackInfo(Lexer *L, const DirectoryLookup *D, TokenLexer *TL) 1126cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner : TheLexer(L), TheDirLookup(D), TheTokenLexer(TL) { 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer }; 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::vector<IncludeStackInfo> IncludeMacroStack; 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// Callbacks - These are actions invoked when some preprocessor activity is 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// encountered (e.g. a file is #included, etc). 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PPCallbacks *Callbacks; 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 121cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner /// Macros - For each IdentifierInfo with 'HasMacro' set, we keep a mapping 122cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner /// to the actual definition of the macro. 123cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner llvm::DenseMap<IdentifierInfo*, MacroInfo*> Macros; 124cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Various statistics we track for performance analysis. 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumDirectives, NumIncluded, NumDefined, NumUndefined, NumPragma; 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumIf, NumElse, NumEndif; 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumEnteredSourceFiles, MaxIncludeStackDepth; 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumMacroExpanded, NumFnMacroExpanded, NumBuiltinMacroExpanded; 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumFastMacroExpanded, NumTokenPaste, NumFastTokenPaste; 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumSkipped; 1329594acf32de2939b15eafa8fe818607bfc56bf66Chris Lattner 133aa39197431a0a0b1326ecf6b3be6a11f6e2f8503Chris Lattner /// Predefines - This string is the predefined macros that preprocessor 134aa39197431a0a0b1326ecf6b3be6a11f6e2f8503Chris Lattner /// should use from the command line etc. 135aa39197431a0a0b1326ecf6b3be6a11f6e2f8503Chris Lattner std::string Predefines; 13653b0dabbe52219a8057659b90539837394ef0fa1Chris Lattner 1376cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner /// TokenLexerCache - Cache macro expanders to reduce malloc traffic. 1386cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner enum { TokenLexerCacheSize = 8 }; 1396cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner unsigned NumCachedTokenLexers; 1406cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner TokenLexer *TokenLexerCache[TokenLexerCacheSize]; 1419e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis 1429e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis /// PeekedToken - Cache the token that was retrieved through LookNext(). 1439e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis /// This is a valid token (its Location is valid) when LookNext() is 1449e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis /// called and gets invalid again when it is "consumed" by Lex(). 1459e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis Token PeekedToken; 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerpublic: 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Preprocessor(Diagnostic &diags, const LangOptions &opts, TargetInfo &target, 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceManager &SM, HeaderSearch &Headers); 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ~Preprocessor(); 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diagnostic &getDiagnostics() const { return Diags; } 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const LangOptions &getLangOptions() const { return Features; } 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer TargetInfo &getTargetInfo() const { return Target; } 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer FileManager &getFileManager() const { return FileMgr; } 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceManager &getSourceManager() const { return SourceMgr; } 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HeaderSearch &getHeaderSearchInfo() const { return HeaderInfo; } 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierTable &getIdentifierTable() { return Identifiers; } 15929238a0bf7cbf5b396efb451a0adb5fe4aa037caSteve Naroff SelectorTable &getSelectorTable() { return Selectors; } 16068d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff 161e0579f08d4a4ae57971b74ca1863106df4c6399fTed Kremenek inline FullSourceLoc getFullLoc(SourceLocation Loc) const { 16294b3cdb57fd5d245963e597626e0dfd88d479795Chris Lattner return FullSourceLoc(Loc, getSourceManager()); 163ea8646993741739d8a04d67396fe466dcc3a104fTed Kremenek } 164ea8646993741739d8a04d67396fe466dcc3a104fTed Kremenek 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// SetCommentRetentionState - Control whether or not the preprocessor retains 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// comments in output. 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void SetCommentRetentionState(bool KeepComments, bool KeepMacroComments) { 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer this->KeepComments = KeepComments | KeepMacroComments; 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer this->KeepMacroComments = KeepMacroComments; 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool getCommentRetentionState() const { return KeepComments; } 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// isCurrentLexer - Return true if we are lexing directly from the specified 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// lexer. 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isCurrentLexer(const Lexer *L) const { 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return CurLexer == L; 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// getCurrentLexer - Return the current file lexer being lexed from. Note 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// that this ignores any potentially active macro expansions and _Pragma 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// expansions going on at the time. 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lexer *getCurrentFileLexer() const; 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 185eb50ed88c2aa040fac08bf2a50bde4dd3da6eb19Chris Lattner /// getPPCallbacks/setPPCallbacks - Accessors for preprocessor callbacks. 186eb50ed88c2aa040fac08bf2a50bde4dd3da6eb19Chris Lattner /// Note that this class takes ownership of any PPCallbacks object given to 187eb50ed88c2aa040fac08bf2a50bde4dd3da6eb19Chris Lattner /// it. 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PPCallbacks *getPPCallbacks() const { return Callbacks; } 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void setPPCallbacks(PPCallbacks *C) { 190eb50ed88c2aa040fac08bf2a50bde4dd3da6eb19Chris Lattner delete Callbacks; 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Callbacks = C; 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 194cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner /// getMacroInfo - Given an identifier, return the MacroInfo it is #defined to 195cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner /// or null if it isn't #define'd. 196cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner MacroInfo *getMacroInfo(IdentifierInfo *II) const { 197cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner return II->hasMacroDefinition() ? Macros.find(II)->second : 0; 198cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner } 199cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner 200cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner /// setMacroInfo - Specify a macro for this identifier. 201cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner /// 202cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner void setMacroInfo(IdentifierInfo *II, MacroInfo *MI); 203cc1a875f94630e58d24a55577ffbf0e89b7da8c7Chris Lattner 204aa39197431a0a0b1326ecf6b3be6a11f6e2f8503Chris Lattner /// setPredefines - Set the predefines for this Preprocessor. These 205aa39197431a0a0b1326ecf6b3be6a11f6e2f8503Chris Lattner /// predefines are automatically injected when parsing the main file. 206aa39197431a0a0b1326ecf6b3be6a11f6e2f8503Chris Lattner void setPredefines(const char *P) { Predefines = P; } 207aa39197431a0a0b1326ecf6b3be6a11f6e2f8503Chris Lattner void setPredefines(const std::string &P) { Predefines = P; } 20853b0dabbe52219a8057659b90539837394ef0fa1Chris Lattner 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// getIdentifierInfo - Return information about the specified preprocessor 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// identifier token. The version of this method that takes two character 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// pointers is preferred unless the identifier is already available as a 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// string (this avoids allocation and copying of memory to construct an 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// std::string). 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *getIdentifierInfo(const char *NameStart, 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *NameEnd) { 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return &Identifiers.get(NameStart, NameEnd); 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *getIdentifierInfo(const char *NameStr) { 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return getIdentifierInfo(NameStr, NameStr+strlen(NameStr)); 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// AddPragmaHandler - Add the specified pragma handler to the preprocessor. 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// If 'Namespace' is non-null, then it is a token required to exist on the 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// pragma line before the pragma string starts, e.g. "STDC" or "GCC". 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void AddPragmaHandler(const char *Namespace, PragmaHandler *Handler); 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 22753b0dabbe52219a8057659b90539837394ef0fa1Chris Lattner /// EnterMainSourceFile - Enter the specified FileID as the main source file, 2287dcc968f17a6ff9088c9651dddccc8d4025a1271Ted Kremenek /// which implicitly adds the builtin defines etc. 22995041a2029a069386ee67439f6d0fb524a9d184fTed Kremenek void EnterMainSourceFile(); 23053b0dabbe52219a8057659b90539837394ef0fa1Chris Lattner 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// EnterSourceFile - Add a source file to the top of the include stack and 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// start lexing tokens from it instead of the current buffer. If isMainFile 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// is true, this is the main file for the translation unit. 23453b0dabbe52219a8057659b90539837394ef0fa1Chris Lattner void EnterSourceFile(unsigned CurFileID, const DirectoryLookup *Dir); 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// EnterMacro - Add a Macro to the top of the include stack and start lexing 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// tokens from it instead of the current buffer. Args specifies the 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// tokens input to a function-like macro. 239d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void EnterMacro(Token &Identifier, MacroArgs *Args); 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// EnterTokenStream - Add a "macro" context to the top of the include stack, 2426b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// which will cause the lexer to start returning the specified tokens. 2436b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// 2446b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// If DisableMacroExpansion is true, tokens lexed from the token stream will 2456b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// not be subject to further macro expansion. Otherwise, these tokens will 2466b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// be re-macro-expanded when/if expansion is enabled. 2476b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// 2486b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// If OwnsTokens is false, this method assumes that the specified stream of 2496b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// tokens has a permanent owner somewhere, so they do not need to be copied. 2506b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// If it is true, it assumes the array of tokens is allocated with new[] and 2516b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// must be freed. 2526b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// 2536b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner void EnterTokenStream(const Token *Toks, unsigned NumToks, 2546b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner bool DisableMacroExpansion, bool OwnsTokens); 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// RemoveTopOfLexerStack - Pop the current lexer/macro exp off the top of the 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// lexer stack. This should only be used in situations where the current 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// state of the top-of-stack lexer is known. 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void RemoveTopOfLexerStack(); 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// Lex - To lex a token from the preprocessor, just pull a token from the 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// current lexer or macro object. 263d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void Lex(Token &Result) { 2645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CurLexer) 2655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CurLexer->Lex(Result); 2669e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis else if (CurTokenLexer) 2676cfe7594a46b5d270142cfcb688a9c1a3a487a48Chris Lattner CurTokenLexer->Lex(Result); 2689e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis else { 2699e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis // We have a peeked token that hasn't been consumed yet. 2709e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis Result = PeekedToken; 2719e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis ConsumedPeekedToken(); 2729e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis } 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// LexNonComment - Lex a token. If it's a comment, keep lexing until we get 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// something not a comment. This is useful in -E -C mode where comments 2775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// would foul up preprocessor directive handling. 278d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void LexNonComment(Token &Result) { 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Result); 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (Result.getKind() == tok::comment); 2825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// LexUnexpandedToken - This is just like Lex, but this disables macro 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// expansion of identifier tokens. 286d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void LexUnexpandedToken(Token &Result) { 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Disable macro expansion. 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool OldVal = DisableMacroExpansion; 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DisableMacroExpansion = true; 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Lex the token. 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Lex(Result); 2925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Reenable it. 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DisableMacroExpansion = OldVal; 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2976b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// LookAhead - This peeks ahead N tokens and returns that token without 2986b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// consuming any tokens. LookAhead(0) returns the next token that would be 2996b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// returned by Lex(), LookAhead(1) returns the token after it, etc. This 3006b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// returns normal tokens after phase 5. As such, it is equivalent to using 3016b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// 'Lex', not 'LexUnexpandedToken'. 3026b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// 3036b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// NOTE: is a relatively expensive method, so it should not be used in common 3046b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// code paths if possible! 3056b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner /// 3066b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner Token LookAhead(unsigned N); 3079e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis 3089e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis /// LookNext - Returns the next token that would be returned by Lex() without 3099e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis /// consuming it. 3109e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis const Token &LookNext() { 3119e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis if (PeekedToken.getLocation().isInvalid()) { 3129e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis // We don't have a peeked token that hasn't been consumed yet. 3139e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis // Peek it now. 3149e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis PeekToken(); 3159e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis } 3169e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis return PeekedToken; 3179e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis } 3189e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis 3199e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidisprivate: 3209e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis /// PeekToken - Lexes one token into PeekedToken and pushes CurLexer, 3219e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis /// CurLexerToken into the IncludeMacroStack before setting them to null. 3229e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis void PeekToken(); 3239e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis 3249e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis /// ConsumedPeekedToken - Called when Lex() is about to return the PeekedToken 3259e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis /// and have it "consumed". 3269e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidis void ConsumedPeekedToken(); 3279e0ed0bd5a3a7bac73973980ff32132a7724e674Argyrios Kyrtzidispublic: 3286b884508c3bc97cc9df9516adb92fbf88dd0a2e4Chris Lattner 3295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// Diag - Forwarding function for diagnostics. This emits a diagnostic at 330d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner /// the specified Token's location, translating the token's start 3315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// position in the current buffer into a SourcePosition object for rendering. 3325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void Diag(SourceLocation Loc, unsigned DiagID); 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg); 3348ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner void Diag(SourceLocation Loc, unsigned DiagID, const std::string &Msg, 3358ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner const SourceRange &R1, const SourceRange &R2); 3368ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner void Diag(SourceLocation Loc, unsigned DiagID, const SourceRange &R); 3378ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner void Diag(SourceLocation Loc, unsigned DiagID, const SourceRange &R1, 3388ed3044a33679cbfa0617d465a50ec557d671ed7Chris Lattner const SourceRange &R2); 339d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void Diag(const Token &Tok, unsigned DiagID) { 3405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok.getLocation(), DiagID); 3415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 342d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void Diag(const Token &Tok, unsigned DiagID, const std::string &Msg) { 3435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Diag(Tok.getLocation(), DiagID, Msg); 3445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// getSpelling() - Return the 'spelling' of the Tok token. The spelling of a 3475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// token is the characters used to represent the token in the source file 3485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// after trigraph expansion and escaped-newline folding. In particular, this 3495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// wants to get the true, uncanonicalized, spelling of things like digraphs 3505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// UCNs, etc. 351d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner std::string getSpelling(const Token &Tok) const; 3525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// getSpelling - This method is used to get the spelling of a token into a 3545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// preallocated buffer, instead of as an std::string. The caller is required 3555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// to allocate enough space for the token, which is guaranteed to be at least 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// Tok.getLength() bytes long. The length of the actual result is returned. 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// Note that this method may do two possible things: it may either fill in 3595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// the buffer specified with characters, or it may *change the input pointer* 3605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// to point to a constant buffer with the data already in it (avoiding a 3615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// copy). The caller is not allowed to modify the returned buffer pointer 3625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// if an internal buffer is returned. 363d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner unsigned getSpelling(const Token &Tok, const char *&Buffer) const; 3645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// CreateString - Plop the specified string into a scratch buffer and return 3675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// a location for it. If specified, the source location provides a source 3685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// location for the token. 3695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation CreateString(const char *Buf, unsigned Len, 3705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation SourceLoc = SourceLocation()); 3715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// DumpToken - Print the token to stderr, used for debugging. 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// 374d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void DumpToken(const Token &Tok, bool DumpFlags = false) const; 375c3d8d57b010e2ed15a2a7685d5761db14f5d2252Chris Lattner void DumpLocation(SourceLocation Loc) const; 3765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void DumpMacro(const MacroInfo &MI) const; 3775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 37897ba77cf09bf7b83b679165ce67ad7d49ffd568cChris Lattner /// AdvanceToTokenCharacter - Given a location that specifies the start of a 37997ba77cf09bf7b83b679165ce67ad7d49ffd568cChris Lattner /// token, return a new location that specifies a character within the token. 38097ba77cf09bf7b83b679165ce67ad7d49ffd568cChris Lattner SourceLocation AdvanceToTokenCharacter(SourceLocation TokStart,unsigned Char); 38197ba77cf09bf7b83b679165ce67ad7d49ffd568cChris Lattner 3825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// IncrementPasteCounter - Increment the counters for the number of token 3835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// paste operations performed. If fast was specified, this is a 'fast paste' 3845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// case we handled. 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void IncrementPasteCounter(bool isFast) { 3875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isFast) 3885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumFastTokenPaste; 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else 3905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumTokenPaste; 3915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void PrintStats(); 3945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3953f1cc838f9caf469990f23fccd0940263c0c61ffChris Lattner /// HandleMicrosoftCommentPaste - When the macro expander pastes together a 3963f1cc838f9caf469990f23fccd0940263c0c61ffChris Lattner /// comment (/##/) in microsoft mode, this method handles updating the current 3973f1cc838f9caf469990f23fccd0940263c0c61ffChris Lattner /// state, returning the token on the next source line. 3983f1cc838f9caf469990f23fccd0940263c0c61ffChris Lattner void HandleMicrosoftCommentPaste(Token &Tok); 3993f1cc838f9caf469990f23fccd0940263c0c61ffChris Lattner 4005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer //===--------------------------------------------------------------------===// 4015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Preprocessor callback methods. These are invoked by a lexer as various 4025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // directives and events are found. 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// LookUpIdentifierInfo - Given a tok::identifier token, look up the 4055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// identifier information for the token and install it into the token. 406d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner IdentifierInfo *LookUpIdentifierInfo(Token &Identifier, 4075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *BufPtr = 0); 4085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// HandleIdentifier - This callback is invoked when the lexer reads an 4105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// identifier and has filled in the tokens IdentifierInfo member. This 4115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// callback potentially macro expands it or turns it into a named token (like 4125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// 'for'). 413d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleIdentifier(Token &Identifier); 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// HandleEndOfFile - This callback is invoked when the lexer hits the end of 4175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// the current file. This either returns the EOF token and returns true, or 4185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// pops a level off the include stack and returns false, at which point the 4195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// client should call lex again. 420d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner bool HandleEndOfFile(Token &Result, bool isEndOfMacro = false); 4215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 422fde2bf9befede63e3f01f84519784c17b4c81480Chris Lattner /// HandleEndOfTokenLexer - This callback is invoked when the current 423fde2bf9befede63e3f01f84519784c17b4c81480Chris Lattner /// TokenLexer hits the end of its token stream. 424fde2bf9befede63e3f01f84519784c17b4c81480Chris Lattner bool HandleEndOfTokenLexer(Token &Result); 4255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// HandleDirective - This callback is invoked when the lexer sees a # token 4275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// at the start of a line. This consumes the directive, modifies the 4285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// lexer/preprocessor state, and advances the lexer(s) so that the next token 4295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// read is the correct one. 430d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleDirective(Token &Result); 4315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// CheckEndOfDirective - Ensure that the next token is a tok::eom token. If 4335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// not, emit a diagnostic and consume up until the eom. 4345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void CheckEndOfDirective(const char *Directive); 4355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerprivate: 43653b0dabbe52219a8057659b90539837394ef0fa1Chris Lattner /// isInPrimaryFile - Return true if we're in the top-level file, not in a 43753b0dabbe52219a8057659b90539837394ef0fa1Chris Lattner /// #include. 43853b0dabbe52219a8057659b90539837394ef0fa1Chris Lattner bool isInPrimaryFile() const; 43953b0dabbe52219a8057659b90539837394ef0fa1Chris Lattner 4405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// DiscardUntilEndOfDirective - Read and discard all tokens remaining on the 4415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// current line until the tok::eom token is found. 4425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void DiscardUntilEndOfDirective(); 4435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// ReadMacroName - Lex and validate a macro name, which occurs after a 4455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// #define or #undef. This emits a diagnostic, sets the token kind to eom, 4465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// and discards the rest of the macro line if the macro name is invalid. 447d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void ReadMacroName(Token &MacroNameTok, char isDefineUndef = 0); 4485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// ReadMacroDefinitionArgList - The ( starting an argument list of a macro 4505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// definition has just been read. Lex the rest of the arguments and the 4515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// closing ), updating MI with what we learn. Return true if an error occurs 4525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// parsing the arg list. 4535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool ReadMacroDefinitionArgList(MacroInfo *MI); 4545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// SkipExcludedConditionalBlock - We just read a #if or related directive and 4565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// decided that the subsequent tokens are in the #if'd out portion of the 4575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// file. Lex the rest of the file, until we see an #endif. If 4585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// FoundNonSkipPortion is true, then we have already emitted code for part of 4595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// this #if directive, so #else/#elif blocks should never be entered. If 4605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// FoundElse is false, then #else directives are ok, if not, then we have 4615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// already seen one so a #else directive is a duplicate. When this returns, 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// the caller can lex the first valid token. 4635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void SkipExcludedConditionalBlock(SourceLocation IfTokenLoc, 4645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool FoundNonSkipPortion, bool FoundElse); 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// EvaluateDirectiveExpression - Evaluate an integer constant expression that 4675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// may occur after a #if or #elif directive and return it as a bool. If the 4685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// expression is equivalent to "!defined(X)" return X in IfNDefMacro. 4695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool EvaluateDirectiveExpression(IdentifierInfo *&IfNDefMacro); 4705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// RegisterBuiltinPragmas - Install the standard preprocessor pragmas: 4725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// #pragma GCC poison/system_header/dependency and #pragma once. 4735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void RegisterBuiltinPragmas(); 4745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// RegisterBuiltinMacros - Register builtin macros, such as __LINE__ with the 4765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// identifier table. 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void RegisterBuiltinMacros(); 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IdentifierInfo *RegisterBuiltinMacro(const char *Name); 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// HandleMacroExpandedIdentifier - If an identifier token is read that is to 4815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// be expanded as a macro, handle it and return the next token as 'Tok'. If 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// the macro should not be expanded return true, otherwise return false. 483d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner bool HandleMacroExpandedIdentifier(Token &Tok, MacroInfo *MI); 4845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// isNextPPTokenLParen - Determine whether the next preprocessor token to be 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// lexed is a '('. If so, consume the token and return true, if not, this 4875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// method should have no observable side-effect on the lexed tokens. 4885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isNextPPTokenLParen(); 4895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// ReadFunctionLikeMacroArgs - After reading "MACRO(", this method is 4915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// invoked to read all of the formal arguments specified for the macro 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// invocation. This returns null on error. 493d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner MacroArgs *ReadFunctionLikeMacroArgs(Token &MacroName, MacroInfo *MI); 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// ExpandBuiltinMacro - If an identifier token is read that is to be expanded 4965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// as a builtin macro, handle it and return the next token as 'Tok'. 497d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void ExpandBuiltinMacro(Token &Tok); 4985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// Handle_Pragma - Read a _Pragma directive, slice it up, process it, then 5005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// return the first token after the directive. The _Pragma token has just 5015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// been read into 'Tok'. 502d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void Handle_Pragma(Token &Tok); 5035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// EnterSourceFileWithLexer - Add a lexer to the top of the include stack and 5065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// start lexing tokens from it instead of the current buffer. 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void EnterSourceFileWithLexer(Lexer *TheLexer, const DirectoryLookup *Dir); 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// GetIncludeFilenameSpelling - Turn the specified lexer token into a fully 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// checked and spelled filename, e.g. as an operand of #include. This returns 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// true if the input filename was in <>'s or false if it were in ""'s. The 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// caller is expected to provide a buffer that is large enough to hold the 5135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// spelling of the filename, but is also expected to handle the case when 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// this method decides to use a different buffer. 515f1c99acc544a4e70f308db4e7200ca04cd5a06d2Chris Lattner bool GetIncludeFilenameSpelling(SourceLocation Loc, 5165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *&BufStart, const char *&BufEnd); 5175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// LookupFile - Given a "foo" or <foo> reference, look up the indicated file, 5195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// return null on failure. isAngled indicates whether the file reference is 5205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// for system #include's or not (i.e. using <> instead of ""). 5215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const FileEntry *LookupFile(const char *FilenameStart,const char *FilenameEnd, 5225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isAngled, const DirectoryLookup *FromDir, 5235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DirectoryLookup *&CurDir); 5245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer //===--------------------------------------------------------------------===// 5265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// Handle*Directive - implement the various preprocessor directives. These 5275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// should side-effect the current preprocessor object so that the next call 5285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// to Lex() will return the appropriate token next. 5295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 530d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleUserDiagnosticDirective(Token &Tok, bool isWarning); 531d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleIdentSCCSDirective(Token &Tok); 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // File inclusion. 534d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleIncludeDirective(Token &Tok, 5355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const DirectoryLookup *LookupFrom = 0, 5365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isImport = false); 537d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleIncludeNextDirective(Token &Tok); 538d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleImportDirective(Token &Tok); 5395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Macro handling. 54142e6737f2efb113563140ad794c21c7709250402Chris Lattner void HandleDefineDirective(Token &Tok); 542d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleUndefDirective(Token &Tok); 543d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner // HandleAssertDirective(Token &Tok); 544d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner // HandleUnassertDirective(Token &Tok); 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Conditional Inclusion. 547d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleIfdefDirective(Token &Tok, bool isIfndef, 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool ReadAnyTokensBeforeDirective); 549d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleIfDirective(Token &Tok, bool ReadAnyTokensBeforeDirective); 550d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleEndifDirective(Token &Tok); 551d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleElseDirective(Token &Tok); 552d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandleElifDirective(Token &Tok); 5535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Pragmas. 5555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer void HandlePragmaDirective(); 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerpublic: 557d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandlePragmaOnce(Token &OnceTok); 5582243449253475574fc6f14986ff8f7fce5d46799Chris Lattner void HandlePragmaMark(); 559d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandlePragmaPoison(Token &PoisonTok); 560d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandlePragmaSystemHeader(Token &SysHeaderTok); 561d217773f106856a11879ec79dc468efefaf2ee75Chris Lattner void HandlePragmaDependency(Token &DependencyTok); 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer}; 5635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 564ec6c574478a22008847d7ebc2498ef3336752096Ted Kremenek/// PreprocessorFactory - A generic factory interface for lazily creating 565ec6c574478a22008847d7ebc2498ef3336752096Ted Kremenek/// Preprocessor objects on-demand when they are needed. 566ec6c574478a22008847d7ebc2498ef3336752096Ted Kremenekclass PreprocessorFactory { 567ec6c574478a22008847d7ebc2498ef3336752096Ted Kremenekpublic: 568ec6c574478a22008847d7ebc2498ef3336752096Ted Kremenek virtual ~PreprocessorFactory(); 569ec6c574478a22008847d7ebc2498ef3336752096Ted Kremenek virtual Preprocessor* CreatePreprocessor() = 0; 570ec6c574478a22008847d7ebc2498ef3336752096Ted Kremenek}; 571ec6c574478a22008847d7ebc2498ef3336752096Ted Kremenek 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} // end namespace clang 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#endif 575