1 //===--- FormatTokenLexer.h - Format C++ code ----------------*- C++ ----*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 /// 10 /// \file 11 /// \brief This file contains FormatTokenLexer, which tokenizes a source file 12 /// into a token stream suitable for ClangFormat. 13 /// 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_CLANG_LIB_FORMAT_FORMATTOKENLEXER_H 17 #define LLVM_CLANG_LIB_FORMAT_FORMATTOKENLEXER_H 18 19 #include "Encoding.h" 20 #include "FormatToken.h" 21 #include "clang/Basic/SourceLocation.h" 22 #include "clang/Basic/SourceManager.h" 23 #include "clang/Format/Format.h" 24 #include "llvm/Support/Regex.h" 25 26 namespace clang { 27 namespace format { 28 29 class FormatTokenLexer { 30 public: 31 FormatTokenLexer(const SourceManager &SourceMgr, FileID ID, 32 const FormatStyle &Style, encoding::Encoding Encoding); 33 34 ArrayRef<FormatToken *> lex(); 35 getKeywords()36 const AdditionalKeywords &getKeywords() { return Keywords; } 37 38 private: 39 void tryMergePreviousTokens(); 40 41 bool tryMergeLessLess(); 42 43 bool tryMergeTokens(ArrayRef<tok::TokenKind> Kinds, TokenType NewType); 44 45 // Returns \c true if \p Tok can only be followed by an operand in JavaScript. 46 bool precedesOperand(FormatToken *Tok); 47 48 bool canPrecedeRegexLiteral(FormatToken *Prev); 49 50 // Tries to parse a JavaScript Regex literal starting at the current token, 51 // if that begins with a slash and is in a location where JavaScript allows 52 // regex literals. Changes the current token to a regex literal and updates 53 // its text if successful. 54 void tryParseJSRegexLiteral(); 55 56 void tryParseTemplateString(); 57 58 bool tryMerge_TMacro(); 59 60 bool tryMergeConflictMarkers(); 61 62 FormatToken *getStashedToken(); 63 64 FormatToken *getNextToken(); 65 66 FormatToken *FormatTok; 67 bool IsFirstToken; 68 bool GreaterStashed, LessStashed; 69 unsigned Column; 70 unsigned TrailingWhitespace; 71 std::unique_ptr<Lexer> Lex; 72 const SourceManager &SourceMgr; 73 FileID ID; 74 const FormatStyle &Style; 75 IdentifierTable IdentTable; 76 AdditionalKeywords Keywords; 77 encoding::Encoding Encoding; 78 llvm::SpecificBumpPtrAllocator<FormatToken> Allocator; 79 // Index (in 'Tokens') of the last token that starts a new line. 80 unsigned FirstInLineIndex; 81 SmallVector<FormatToken *, 16> Tokens; 82 SmallVector<IdentifierInfo *, 8> ForEachMacros; 83 84 bool FormattingDisabled; 85 86 llvm::Regex MacroBlockBeginRegex; 87 llvm::Regex MacroBlockEndRegex; 88 89 void readRawToken(FormatToken &Tok); 90 91 void resetLexer(unsigned Offset); 92 }; 93 94 } // namespace format 95 } // namespace clang 96 97 #endif 98