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//===- AsmLexer.h - Lexer for Assembly Files --------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This class declares the lexer for assembly files.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCPARSER_ASMLEXER_H
#define LLVM_MC_MCPARSER_ASMLEXER_H
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
#include <string>
namespace llvm {
class MCAsmInfo;
/// AsmLexer - Lexer class for assembly files.
class AsmLexer : public MCAsmLexer {
const MCAsmInfo &MAI;
const char *CurPtr = nullptr;
StringRef CurBuf;
bool IsAtStartOfLine = true;
bool IsAtStartOfStatement = true;
bool IsPeeking = false;
bool EndStatementAtEOF = true;
protected:
/// LexToken - Read the next token and return its code.
AsmToken LexToken() override;
public:
AsmLexer(const MCAsmInfo &MAI);
AsmLexer(const AsmLexer &) = delete;
AsmLexer &operator=(const AsmLexer &) = delete;
~AsmLexer() override;
void setBuffer(StringRef Buf, const char *ptr = nullptr,
bool EndStatementAtEOF = true);
StringRef LexUntilEndOfStatement() override;
size_t peekTokens(MutableArrayRef<AsmToken> Buf,
bool ShouldSkipSpace = true) override;
const MCAsmInfo &getMAI() const { return MAI; }
private:
bool isAtStartOfComment(const char *Ptr);
bool isAtStatementSeparator(const char *Ptr);
[[nodiscard]] int getNextChar();
int peekNextChar();
AsmToken ReturnError(const char *Loc, const std::string &Msg);
AsmToken LexIdentifier();
AsmToken LexSlash();
AsmToken LexLineComment();
AsmToken LexDigit();
AsmToken LexSingleQuote();
AsmToken LexQuote();
AsmToken LexFloatLiteral();
AsmToken LexHexFloatLiteral(bool NoIntDigits);
StringRef LexUntilEndOfLine();
};
} // end namespace llvm
#endif // LLVM_MC_MCPARSER_ASMLEXER_H
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