1//===- LLLexer.h - Lexer for LLVM Assembly Files ----------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This class represents the Lexer for .ll files.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLVM_ASMPARSER_LLLEXER_H
14#define LLVM_ASMPARSER_LLLEXER_H
15
16#include "LLToken.h"
17#include "llvm/ADT/APFloat.h"
18#include "llvm/ADT/APSInt.h"
19#include "llvm/Support/SMLoc.h"
20#include <string>
21
22namespace llvm {
23 class Type;
24 class SMDiagnostic;
25 class SourceMgr;
26 class LLVMContext;
27
28 class LLLexer {
29 const char *CurPtr;
30 StringRef CurBuf;
31 SMDiagnostic &ErrorInfo;
32 SourceMgr &SM;
33 LLVMContext &Context;
34
35 // Information about the current token.
36 const char *TokStart;
37 lltok::Kind CurKind;
38 std::string StrVal;
39 unsigned UIntVal = 0;
40 Type *TyVal = nullptr;
41 APFloat APFloatVal{0.0};
42 APSInt APSIntVal{0};
43
44 // When false (default), an identifier ending in ':' is a label token.
45 // When true, the ':' is treated as a separate token.
46 bool IgnoreColonInIdentifiers = false;
47
48 public:
49 explicit LLLexer(StringRef StartBuf, SourceMgr &SM, SMDiagnostic &,
50 LLVMContext &C);
51
52 lltok::Kind Lex() {
53 return CurKind = LexToken();
54 }
55
56 typedef SMLoc LocTy;
57 LocTy getLoc() const { return SMLoc::getFromPointer(Ptr: TokStart); }
58 lltok::Kind getKind() const { return CurKind; }
59 const std::string &getStrVal() const { return StrVal; }
60 Type *getTyVal() const { return TyVal; }
61 unsigned getUIntVal() const { return UIntVal; }
62 const APSInt &getAPSIntVal() const { return APSIntVal; }
63 const APFloat &getAPFloatVal() const { return APFloatVal; }
64
65 void setIgnoreColonInIdentifiers(bool val) {
66 IgnoreColonInIdentifiers = val;
67 }
68
69 bool Error(LocTy ErrorLoc, const Twine &Msg) const;
70 bool Error(const Twine &Msg) const { return Error(ErrorLoc: getLoc(), Msg); }
71
72 void Warning(LocTy WarningLoc, const Twine &Msg) const;
73 void Warning(const Twine &Msg) const { return Warning(WarningLoc: getLoc(), Msg); }
74
75 private:
76 lltok::Kind LexToken();
77
78 int getNextChar();
79 void SkipLineComment();
80 lltok::Kind ReadString(lltok::Kind kind);
81 bool ReadVarName();
82
83 lltok::Kind LexIdentifier();
84 lltok::Kind LexDigitOrNegative();
85 lltok::Kind LexPositive();
86 lltok::Kind LexAt();
87 lltok::Kind LexDollar();
88 lltok::Kind LexExclaim();
89 lltok::Kind LexPercent();
90 lltok::Kind LexUIntID(lltok::Kind Token);
91 lltok::Kind LexVar(lltok::Kind Var, lltok::Kind VarID);
92 lltok::Kind LexQuote();
93 lltok::Kind Lex0x();
94 lltok::Kind LexHash();
95 lltok::Kind LexCaret();
96
97 uint64_t atoull(const char *Buffer, const char *End);
98 uint64_t HexIntToVal(const char *Buffer, const char *End);
99 void HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
100 void FP80HexToIntPair(const char *Buffer, const char *End, uint64_t Pair[2]);
101 };
102} // end namespace llvm
103
104#endif
105

source code of llvm/include/llvm/AsmParser/LLLexer.h