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537dca94b3
Some of the more complex directive and macro handling for GAS compatibility requires lookahead. Add a single token lookahead in the MCAsmLexer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201058 91177308-0d34-0410-b5e6-96231b3b80d8
74 lines
1.9 KiB
C++
74 lines
1.9 KiB
C++
//===- AsmLexer.h - Lexer for Assembly Files --------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class declares the lexer for assembly files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCPARSER_ASMLEXER_H
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#define LLVM_MC_MCPARSER_ASMLEXER_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/MC/MCParser/MCAsmLexer.h"
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#include "llvm/Support/DataTypes.h"
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#include <string>
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namespace llvm {
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class MemoryBuffer;
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class MCAsmInfo;
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/// AsmLexer - Lexer class for assembly files.
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class AsmLexer : public MCAsmLexer {
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const MCAsmInfo &MAI;
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const char *CurPtr;
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const MemoryBuffer *CurBuf;
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bool isAtStartOfLine;
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void operator=(const AsmLexer&) LLVM_DELETED_FUNCTION;
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AsmLexer(const AsmLexer&) LLVM_DELETED_FUNCTION;
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protected:
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/// LexToken - Read the next token and return its code.
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virtual AsmToken LexToken();
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public:
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AsmLexer(const MCAsmInfo &MAI);
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~AsmLexer();
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void setBuffer(const MemoryBuffer *buf, const char *ptr = NULL);
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virtual StringRef LexUntilEndOfStatement();
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StringRef LexUntilEndOfLine();
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virtual const AsmToken peekTok(bool ShouldSkipSpace = true);
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bool isAtStartOfComment(char Char);
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bool isAtStatementSeparator(const char *Ptr);
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const MCAsmInfo &getMAI() const { return MAI; }
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private:
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int getNextChar();
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AsmToken ReturnError(const char *Loc, const std::string &Msg);
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AsmToken LexIdentifier();
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AsmToken LexSlash();
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AsmToken LexLineComment();
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AsmToken LexDigit();
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AsmToken LexSingleQuote();
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AsmToken LexQuote();
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AsmToken LexFloatLiteral();
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AsmToken LexHexFloatLiteral(bool NoIntDigits);
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};
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} // end namespace llvm
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#endif
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