1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
//===- TGLexer.h - Lexer for TableGen Files ---------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class represents the Lexer for tablegen files.
//
//===----------------------------------------------------------------------===//
#ifndef TGLEXER_H
#define TGLEXER_H
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/SMLoc.h"
#include <cassert>
#include <map>
#include <string>
namespace llvm {
class MemoryBuffer;
class SourceMgr;
class SMLoc;
class Twine;
namespace tgtok {
enum TokKind {
// Markers
Eof, Error,
// Tokens with no info.
minus, plus, // - +
l_square, r_square, // [ ]
l_brace, r_brace, // { }
l_paren, r_paren, // ( )
less, greater, // < >
colon, semi, // : ;
comma, period, // , .
equal, question, // = ?
paste, // #
// Keywords.
Bit, Bits, Class, Code, Dag, Def, Foreach, Defm, Field, In, Int, Let, List,
MultiClass, String,
// !keywords.
XConcat, XADD, XSRA, XSRL, XSHL, XStrConcat, XCast, XSubst,
XForEach, XHead, XTail, XEmpty, XIf, XEq,
// Integer value.
IntVal,
// String valued tokens.
Id, StrVal, VarName, CodeFragment
};
}
/// TGLexer - TableGen Lexer class.
class TGLexer {
SourceMgr &SrcMgr;
const char *CurPtr;
const MemoryBuffer *CurBuf;
// Information about the current token.
const char *TokStart;
tgtok::TokKind CurCode;
std::string CurStrVal; // This is valid for ID, STRVAL, VARNAME, CODEFRAGMENT
int64_t CurIntVal; // This is valid for INTVAL.
/// CurBuffer - This is the current buffer index we're lexing from as managed
/// by the SourceMgr object.
int CurBuffer;
public:
typedef std::map<std::string, SMLoc> DependenciesMapTy;
private:
/// Dependencies - This is the list of all included files.
DependenciesMapTy Dependencies;
public:
TGLexer(SourceMgr &SrcMgr);
~TGLexer() {}
tgtok::TokKind Lex() {
return CurCode = LexToken();
}
const DependenciesMapTy &getDependencies() const {
return Dependencies;
}
tgtok::TokKind getCode() const { return CurCode; }
const std::string &getCurStrVal() const {
assert((CurCode == tgtok::Id || CurCode == tgtok::StrVal ||
CurCode == tgtok::VarName || CurCode == tgtok::CodeFragment) &&
"This token doesn't have a string value");
return CurStrVal;
}
int64_t getCurIntVal() const {
assert(CurCode == tgtok::IntVal && "This token isn't an integer");
return CurIntVal;
}
SMLoc getLoc() const;
private:
/// LexToken - Read the next token and return its code.
tgtok::TokKind LexToken();
tgtok::TokKind ReturnError(const char *Loc, const Twine &Msg);
int getNextChar();
int peekNextChar(int Index);
void SkipBCPLComment();
bool SkipCComment();
tgtok::TokKind LexIdentifier();
bool LexInclude();
tgtok::TokKind LexString();
tgtok::TokKind LexVarName();
tgtok::TokKind LexNumber();
tgtok::TokKind LexBracket();
tgtok::TokKind LexExclaim();
};
} // end namespace llvm
#endif
|
