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105 lines
3.1 KiB
C++
105 lines
3.1 KiB
C++
//===- LLLexer.h - Lexer for LLVM Assembly Files ----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This class represents the Lexer for .ll files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_ASMPARSER_LLLEXER_H
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#define LLVM_LIB_ASMPARSER_LLLEXER_H
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#include "LLToken.h"
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#include "llvm/ADT/APFloat.h"
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#include "llvm/ADT/APSInt.h"
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#include "llvm/Support/SMLoc.h"
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#include <string>
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namespace llvm {
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class Type;
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class SMDiagnostic;
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class SourceMgr;
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class LLVMContext;
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class LLLexer {
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const char *CurPtr;
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StringRef CurBuf;
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SMDiagnostic &ErrorInfo;
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SourceMgr &SM;
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LLVMContext &Context;
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// Information about the current token.
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const char *TokStart;
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lltok::Kind CurKind;
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std::string StrVal;
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unsigned UIntVal;
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Type *TyVal;
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APFloat APFloatVal;
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APSInt APSIntVal;
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// When false (default), an identifier ending in ':' is a label token.
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// When true, the ':' is treated as a separate token.
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bool IgnoreColonInIdentifiers;
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public:
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explicit LLLexer(StringRef StartBuf, SourceMgr &SM, SMDiagnostic &,
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LLVMContext &C);
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lltok::Kind Lex() {
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return CurKind = LexToken();
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}
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typedef SMLoc LocTy;
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LocTy getLoc() const { return SMLoc::getFromPointer(TokStart); }
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lltok::Kind getKind() const { return CurKind; }
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const std::string &getStrVal() const { return StrVal; }
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Type *getTyVal() const { return TyVal; }
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unsigned getUIntVal() const { return UIntVal; }
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const APSInt &getAPSIntVal() const { return APSIntVal; }
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const APFloat &getAPFloatVal() const { return APFloatVal; }
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void setIgnoreColonInIdentifiers(bool val) {
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IgnoreColonInIdentifiers = val;
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}
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bool Error(LocTy ErrorLoc, const Twine &Msg) const;
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bool Error(const Twine &Msg) const { return Error(getLoc(), Msg); }
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void Warning(LocTy WarningLoc, const Twine &Msg) const;
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void Warning(const Twine &Msg) const { return Warning(getLoc(), Msg); }
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private:
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lltok::Kind LexToken();
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int getNextChar();
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void SkipLineComment();
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lltok::Kind ReadString(lltok::Kind kind);
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bool ReadVarName();
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lltok::Kind LexIdentifier();
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lltok::Kind LexDigitOrNegative();
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lltok::Kind LexPositive();
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lltok::Kind LexAt();
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lltok::Kind LexDollar();
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lltok::Kind LexExclaim();
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lltok::Kind LexPercent();
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lltok::Kind LexUIntID(lltok::Kind Token);
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lltok::Kind LexVar(lltok::Kind Var, lltok::Kind VarID);
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lltok::Kind LexQuote();
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lltok::Kind Lex0x();
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lltok::Kind LexHash();
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lltok::Kind LexCaret();
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uint64_t atoull(const char *Buffer, const char *End);
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uint64_t HexIntToVal(const char *Buffer, const char *End);
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void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
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void FP80HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
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};
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} // end namespace llvm
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#endif
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