1 //===- AsmLexer.h - Lexer for Assembly Files --------------------*- 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 // This class declares the lexer for assembly files. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_MC_MCPARSER_ASMLEXER_H 15 #define LLVM_MC_MCPARSER_ASMLEXER_H 16 17 #include "llvm/ADT/StringRef.h" 18 #include "llvm/MC/MCParser/MCAsmLexer.h" 19 #include "llvm/Support/DataTypes.h" 20 #include <string> 21 22 namespace llvm { 23 class MemoryBuffer; 24 class MCAsmInfo; 25 26 /// AsmLexer - Lexer class for assembly files. 27 class AsmLexer : public MCAsmLexer { 28 const MCAsmInfo &MAI; 29 30 const char *CurPtr; 31 StringRef CurBuf; 32 bool isAtStartOfLine; 33 34 void operator=(const AsmLexer&) LLVM_DELETED_FUNCTION; 35 AsmLexer(const AsmLexer&) LLVM_DELETED_FUNCTION; 36 37 protected: 38 /// LexToken - Read the next token and return its code. 39 AsmToken LexToken() override; 40 41 public: 42 AsmLexer(const MCAsmInfo &MAI); 43 ~AsmLexer(); 44 45 void setBuffer(StringRef Buf, const char *ptr = nullptr); 46 47 StringRef LexUntilEndOfStatement() override; 48 StringRef LexUntilEndOfLine(); 49 50 const AsmToken peekTok(bool ShouldSkipSpace = true) override; 51 52 bool isAtStartOfComment(char Char); 53 bool isAtStatementSeparator(const char *Ptr); 54 55 const MCAsmInfo &getMAI() const { return MAI; } 56 57 private: 58 int getNextChar(); 59 AsmToken ReturnError(const char *Loc, const std::string &Msg); 60 61 AsmToken LexIdentifier(); 62 AsmToken LexSlash(); 63 AsmToken LexLineComment(); 64 AsmToken LexDigit(); 65 AsmToken LexSingleQuote(); 66 AsmToken LexQuote(); 67 AsmToken LexFloatLiteral(); 68 AsmToken LexHexFloatLiteral(bool NoIntDigits); 69 }; 70 71 } // end namespace llvm 72 73 #endif 74
