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Diffstat (limited to 'include/clang/Lex/TokenLexer.h')
| -rw-r--r-- | include/clang/Lex/TokenLexer.h | 205 |
1 files changed, 0 insertions, 205 deletions
diff --git a/include/clang/Lex/TokenLexer.h b/include/clang/Lex/TokenLexer.h deleted file mode 100644 index fdeed44..0000000 --- a/include/clang/Lex/TokenLexer.h +++ /dev/null @@ -1,205 +0,0 @@ -//===--- TokenLexer.h - Lex from a token buffer -----------------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file defines the TokenLexer interface. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_CLANG_LEX_TOKENLEXER_H -#define LLVM_CLANG_LEX_TOKENLEXER_H - -#include "clang/Basic/SourceLocation.h" - -namespace clang { - class MacroInfo; - class Preprocessor; - class Token; - class MacroArgs; - -/// TokenLexer - This implements a lexer that returns tokens from a macro body -/// or token stream instead of lexing from a character buffer. This is used for -/// macro expansion and _Pragma handling, for example. -/// -class TokenLexer { - /// Macro - The macro we are expanding from. This is null if expanding a - /// token stream. - /// - MacroInfo *Macro; - - /// ActualArgs - The actual arguments specified for a function-like macro, or - /// null. The TokenLexer owns the pointed-to object. - MacroArgs *ActualArgs; - - /// PP - The current preprocessor object we are expanding for. - /// - Preprocessor &PP; - - /// Tokens - This is the pointer to an array of tokens that the macro is - /// defined to, with arguments expanded for function-like macros. If this is - /// a token stream, these are the tokens we are returning. This points into - /// the macro definition we are lexing from, a cache buffer that is owned by - /// the preprocessor, or some other buffer that we may or may not own - /// (depending on OwnsTokens). - /// Note that if it points into Preprocessor's cache buffer, the Preprocessor - /// may update the pointer as needed. - const Token *Tokens; - friend class Preprocessor; - - /// NumTokens - This is the length of the Tokens array. - /// - unsigned NumTokens; - - /// CurToken - This is the next token that Lex will return. - /// - unsigned CurToken; - - /// ExpandLocStart/End - The source location range where this macro was - /// expanded. - SourceLocation ExpandLocStart, ExpandLocEnd; - - /// \brief Source location pointing at the source location entry chunk that - /// was reserved for the current macro expansion. - SourceLocation MacroExpansionStart; - - /// \brief The offset of the macro expansion in the - /// "source location address space". - unsigned MacroStartSLocOffset; - - /// \brief Location of the macro definition. - SourceLocation MacroDefStart; - /// \brief Length of the macro definition. - unsigned MacroDefLength; - - /// Lexical information about the expansion point of the macro: the identifier - /// that the macro expanded from had these properties. - bool AtStartOfLine : 1; - bool HasLeadingSpace : 1; - - // NextTokGetsSpace - When this is true, the next token appended to the - // output list during function argument expansion will get a leading space, - // regardless of whether it had one to begin with or not. This is used for - // placemarker support. If still true after function argument expansion, the - // leading space will be applied to the first token following the macro - // expansion. - bool NextTokGetsSpace : 1; - - /// OwnsTokens - This is true if this TokenLexer allocated the Tokens - /// array, and thus needs to free it when destroyed. For simple object-like - /// macros (for example) we just point into the token buffer of the macro - /// definition, we don't make a copy of it. - bool OwnsTokens : 1; - - /// DisableMacroExpansion - This is true when tokens lexed from the TokenLexer - /// should not be subject to further macro expansion. - bool DisableMacroExpansion : 1; - - TokenLexer(const TokenLexer &) = delete; - void operator=(const TokenLexer &) = delete; -public: - /// Create a TokenLexer for the specified macro with the specified actual - /// arguments. Note that this ctor takes ownership of the ActualArgs pointer. - /// ILEnd specifies the location of the ')' for a function-like macro or the - /// identifier for an object-like macro. - TokenLexer(Token &Tok, SourceLocation ILEnd, MacroInfo *MI, - MacroArgs *ActualArgs, Preprocessor &pp) - : Macro(nullptr), ActualArgs(nullptr), PP(pp), OwnsTokens(false) { - Init(Tok, ILEnd, MI, ActualArgs); - } - - /// Init - Initialize this TokenLexer to expand from the specified macro - /// with the specified argument information. Note that this ctor takes - /// ownership of the ActualArgs pointer. ILEnd specifies the location of the - /// ')' for a function-like macro or the identifier for an object-like macro. - void Init(Token &Tok, SourceLocation ILEnd, MacroInfo *MI, - MacroArgs *ActualArgs); - - /// Create a TokenLexer for the specified token stream. If 'OwnsTokens' is - /// specified, this takes ownership of the tokens and delete[]'s them when - /// the token lexer is empty. - TokenLexer(const Token *TokArray, unsigned NumToks, bool DisableExpansion, - bool ownsTokens, Preprocessor &pp) - : Macro(nullptr), ActualArgs(nullptr), PP(pp), OwnsTokens(false) { - Init(TokArray, NumToks, DisableExpansion, ownsTokens); - } - - /// Init - Initialize this TokenLexer with the specified token stream. - /// This does not take ownership of the specified token vector. - /// - /// DisableExpansion is true when macro expansion of tokens lexed from this - /// stream should be disabled. - void Init(const Token *TokArray, unsigned NumToks, - bool DisableMacroExpansion, bool OwnsTokens); - - ~TokenLexer() { destroy(); } - - /// isNextTokenLParen - If the next token lexed will pop this macro off the - /// expansion stack, return 2. If the next unexpanded token is a '(', return - /// 1, otherwise return 0. - unsigned isNextTokenLParen() const; - - /// Lex - Lex and return a token from this macro stream. - bool Lex(Token &Tok); - - /// isParsingPreprocessorDirective - Return true if we are in the middle of a - /// preprocessor directive. - bool isParsingPreprocessorDirective() const; - -private: - void destroy(); - - /// isAtEnd - Return true if the next lex call will pop this macro off the - /// include stack. - bool isAtEnd() const { - return CurToken == NumTokens; - } - - /// PasteTokens - Tok is the LHS of a ## operator, and CurToken is the ## - /// operator. Read the ## and RHS, and paste the LHS/RHS together. If there - /// are is another ## after it, chomp it iteratively. Return the result as - /// Tok. If this returns true, the caller should immediately return the - /// token. - bool PasteTokens(Token &Tok); - - /// Expand the arguments of a function-like macro so that we can quickly - /// return preexpanded tokens from Tokens. - void ExpandFunctionArguments(); - - /// HandleMicrosoftCommentPaste - In microsoft compatibility mode, /##/ pastes - /// together to form a comment that comments out everything in the current - /// macro, other active macros, and anything left on the current physical - /// source line of the expanded buffer. Handle this by returning the - /// first token on the next line. - void HandleMicrosoftCommentPaste(Token &Tok, SourceLocation OpLoc); - - /// \brief If \p loc is a FileID and points inside the current macro - /// definition, returns the appropriate source location pointing at the - /// macro expansion source location entry. - SourceLocation getExpansionLocForMacroDefLoc(SourceLocation loc) const; - - /// \brief Creates SLocEntries and updates the locations of macro argument - /// tokens to their new expanded locations. - /// - /// \param ArgIdSpellLoc the location of the macro argument id inside the - /// macro definition. - void updateLocForMacroArgTokens(SourceLocation ArgIdSpellLoc, - Token *begin_tokens, Token *end_tokens); - - /// Remove comma ahead of __VA_ARGS__, if present, according to compiler - /// dialect settings. Returns true if the comma is removed. - bool MaybeRemoveCommaBeforeVaArgs(SmallVectorImpl<Token> &ResultToks, - bool HasPasteOperator, - MacroInfo *Macro, unsigned MacroArgNo, - Preprocessor &PP); - - void PropagateLineStartLeadingSpaceInfo(Token &Result); -}; - -} // end namespace clang - -#endif |
