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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef frontend_TokenKind_h
#define frontend_TokenKind_h
#include <stdint.h>
/*
* List of token kinds and their ranges.
*
* The format for each line is:
*
* MACRO(<TOKEN_KIND_NAME>, <DESCRIPTION>)
*
* or
*
* RANGE(<TOKEN_RANGE_NAME>, <TOKEN_KIND_NAME>)
*
* where ;
* <TOKEN_KIND_NAME> is a legal C identifier of the token, that will be used in
* the JS engine source.
*
* <DESCRIPTION> is a string that describe about the token, and will be used in
* error message.
*
* <TOKEN_RANGE_NAME> is a legal C identifier of the range that will be used to
* JS engine source. It should end with `First` or `Last`. This is used to check
* TokenKind by range-testing:
* BinOpFirst <= tt && tt <= BinOpLast
*
* Second argument of `RANGE` is the actual value of the <TOKEN_RANGE_NAME>,
* should be same as one of <TOKEN_KIND_NAME> in other `MACRO`s.
*
* To use this macro, define two macros for `MACRO` and `RANGE`, and pass them
* as arguments.
*
* #define EMIT_TOKEN(name, desc) ...
* #define EMIT_RANGE(name, value) ...
* FOR_EACH_TOKEN_KIND_WITH_RANGE(EMIT_TOKEN, EMIT_RANGE)
* #undef EMIT_TOKEN
* #undef EMIT_RANGE
*
* If you don't need range data, use FOR_EACH_TOKEN_KIND instead.
*
* #define EMIT_TOKEN(name, desc) ...
* FOR_EACH_TOKEN_KIND(EMIT_TOKEN)
* #undef EMIT_TOKEN
*
* Note that this list does not contain ERROR and LIMIT.
*/
#define FOR_EACH_TOKEN_KIND_WITH_RANGE(MACRO, RANGE) \
MACRO(Eof, "end of script") \
\
/* only returned by peekTokenSameLine() */ \
MACRO(Eol, "line terminator") \
\
MACRO(Semi, "';'") \
MACRO(Comma, "','") \
MACRO(Hook, "'?'") /* conditional */ \
MACRO(Colon, "':'") /* conditional */ \
MACRO(Inc, "'++'") /* increment */ \
MACRO(Dec, "'--'") /* decrement */ \
MACRO(Dot, "'.'") /* member operator */ \
MACRO(TripleDot, "'...'") /* rest arguments and spread operator */ \
MACRO(OptionalChain, "'?.'") \
MACRO(LeftBracket, "'['") \
MACRO(RightBracket, "']'") \
MACRO(LeftCurly, "'{'") \
MACRO(RightCurly, "'}'") \
MACRO(LeftParen, "'('") \
MACRO(RightParen, "')'") \
MACRO(Name, "identifier") \
MACRO(PrivateName, "private identifier") \
MACRO(Number, "numeric literal") \
MACRO(String, "string literal") \
MACRO(BigInt, "bigint literal") \
\
/* start of template literal with substitutions */ \
MACRO(TemplateHead, "'${'") \
/* template literal without substitutions */ \
MACRO(NoSubsTemplate, "template literal") \
\
MACRO(RegExp, "regular expression literal") \
MACRO(True, "boolean literal 'true'") \
RANGE(ReservedWordLiteralFirst, True) \
MACRO(False, "boolean literal 'false'") \
MACRO(Null, "null literal") \
RANGE(ReservedWordLiteralLast, Null) \
MACRO(This, "keyword 'this'") \
RANGE(KeywordFirst, This) \
MACRO(Function, "keyword 'function'") \
MACRO(If, "keyword 'if'") \
MACRO(Else, "keyword 'else'") \
MACRO(Switch, "keyword 'switch'") \
MACRO(Case, "keyword 'case'") \
MACRO(Default, "keyword 'default'") \
MACRO(While, "keyword 'while'") \
MACRO(Do, "keyword 'do'") \
MACRO(For, "keyword 'for'") \
MACRO(Break, "keyword 'break'") \
MACRO(Continue, "keyword 'continue'") \
MACRO(Var, "keyword 'var'") \
MACRO(Const, "keyword 'const'") \
MACRO(With, "keyword 'with'") \
MACRO(Return, "keyword 'return'") \
MACRO(New, "keyword 'new'") \
MACRO(Delete, "keyword 'delete'") \
MACRO(Try, "keyword 'try'") \
MACRO(Catch, "keyword 'catch'") \
MACRO(Finally, "keyword 'finally'") \
MACRO(Throw, "keyword 'throw'") \
MACRO(Debugger, "keyword 'debugger'") \
MACRO(Export, "keyword 'export'") \
MACRO(Import, "keyword 'import'") \
MACRO(Class, "keyword 'class'") \
MACRO(Extends, "keyword 'extends'") \
MACRO(Super, "keyword 'super'") \
RANGE(KeywordLast, Super) \
\
/* contextual keywords */ \
MACRO(As, "'as'") \
RANGE(ContextualKeywordFirst, As) \
MACRO(Async, "'async'") \
MACRO(Await, "'await'") \
MACRO(Each, "'each'") \
MACRO(From, "'from'") \
MACRO(Get, "'get'") \
MACRO(Let, "'let'") \
MACRO(Meta, "'meta'") \
MACRO(Of, "'of'") \
MACRO(Set, "'set'") \
MACRO(Static, "'static'") \
MACRO(Target, "'target'") \
MACRO(Yield, "'yield'") \
RANGE(ContextualKeywordLast, Yield) \
\
/* future reserved words */ \
MACRO(Enum, "reserved word 'enum'") \
RANGE(FutureReservedKeywordFirst, Enum) \
RANGE(FutureReservedKeywordLast, Enum) \
\
/* reserved words in strict mode */ \
MACRO(Implements, "reserved word 'implements'") \
RANGE(StrictReservedKeywordFirst, Implements) \
MACRO(Interface, "reserved word 'interface'") \
MACRO(Package, "reserved word 'package'") \
MACRO(Private, "reserved word 'private'") \
MACRO(Protected, "reserved word 'protected'") \
MACRO(Public, "reserved word 'public'") \
RANGE(StrictReservedKeywordLast, Public) \
\
/* \
* The following token types occupy contiguous ranges to enable easy \
* range-testing. \
*/ \
/* \
* Binary operators. \
* This list must be kept in the same order in several places: \
* - the binary operators in ParseNode.h \
* - the precedence list in Parser.cpp \
* - the JSOp code list in BytecodeEmitter.cpp \
*/ \
MACRO(Pipeline, "'|>'") \
RANGE(BinOpFirst, Pipeline) \
MACRO(Coalesce, "'\?\?'") /* escapes to avoid trigraphs warning */ \
MACRO(Or, "'||'") /* logical or */ \
MACRO(And, "'&&'") /* logical and */ \
MACRO(BitOr, "'|'") /* bitwise-or */ \
MACRO(BitXor, "'^'") /* bitwise-xor */ \
MACRO(BitAnd, "'&'") /* bitwise-and */ \
\
/* Equality operation tokens, per TokenKindIsEquality. */ \
MACRO(StrictEq, "'==='") \
RANGE(EqualityStart, StrictEq) \
MACRO(Eq, "'=='") \
MACRO(StrictNe, "'!=='") \
MACRO(Ne, "'!='") \
RANGE(EqualityLast, Ne) \
\
/* Relational ops, per TokenKindIsRelational. */ \
MACRO(Lt, "'<'") \
RANGE(RelOpStart, Lt) \
MACRO(Le, "'<='") \
MACRO(Gt, "'>'") \
MACRO(Ge, "'>='") \
RANGE(RelOpLast, Ge) \
\
MACRO(InstanceOf, "keyword 'instanceof'") \
RANGE(KeywordBinOpFirst, InstanceOf) \
MACRO(In, "keyword 'in'") \
RANGE(KeywordBinOpLast, In) \
\
/* Shift ops, per TokenKindIsShift. */ \
MACRO(Lsh, "'<<'") \
RANGE(ShiftOpStart, Lsh) \
MACRO(Rsh, "'>>'") \
MACRO(Ursh, "'>>>'") \
RANGE(ShiftOpLast, Ursh) \
\
MACRO(Add, "'+'") \
MACRO(Sub, "'-'") \
MACRO(Mul, "'*'") \
MACRO(Div, "'/'") \
MACRO(Mod, "'%'") \
MACRO(Pow, "'**'") \
RANGE(BinOpLast, Pow) \
\
/* Unary operation tokens. */ \
MACRO(TypeOf, "keyword 'typeof'") \
RANGE(KeywordUnOpFirst, TypeOf) \
MACRO(Void, "keyword 'void'") \
RANGE(KeywordUnOpLast, Void) \
MACRO(Not, "'!'") \
MACRO(BitNot, "'~'") \
\
MACRO(Arrow, "'=>'") /* function arrow */ \
\
/* Assignment ops, per TokenKindIsAssignment */ \
MACRO(Assign, "'='") \
RANGE(AssignmentStart, Assign) \
MACRO(AddAssign, "'+='") \
MACRO(SubAssign, "'-='") \
MACRO(CoalesceAssign, "'\?\?='") /* avoid trigraphs warning */ \
MACRO(OrAssign, "'||='") \
MACRO(AndAssign, "'&&='") \
MACRO(BitOrAssign, "'|='") \
MACRO(BitXorAssign, "'^='") \
MACRO(BitAndAssign, "'&='") \
MACRO(LshAssign, "'<<='") \
MACRO(RshAssign, "'>>='") \
MACRO(UrshAssign, "'>>>='") \
MACRO(MulAssign, "'*='") \
MACRO(DivAssign, "'/='") \
MACRO(ModAssign, "'%='") \
MACRO(PowAssign, "'**='") \
RANGE(AssignmentLast, PowAssign)
#define TOKEN_KIND_RANGE_EMIT_NONE(name, value)
#define FOR_EACH_TOKEN_KIND(MACRO) \
FOR_EACH_TOKEN_KIND_WITH_RANGE(MACRO, TOKEN_KIND_RANGE_EMIT_NONE)
namespace js {
namespace frontend {
// Values of this type are used to index into arrays such as isExprEnding[],
// so the first value must be zero.
enum class TokenKind : uint8_t {
#define EMIT_ENUM(name, desc) name,
#define EMIT_ENUM_RANGE(name, value) name = value,
FOR_EACH_TOKEN_KIND_WITH_RANGE(EMIT_ENUM, EMIT_ENUM_RANGE)
#undef EMIT_ENUM
#undef EMIT_ENUM_RANGE
Limit // domain size
};
inline bool TokenKindIsBinaryOp(TokenKind tt) {
return TokenKind::BinOpFirst <= tt && tt <= TokenKind::BinOpLast;
}
inline bool TokenKindIsEquality(TokenKind tt) {
return TokenKind::EqualityStart <= tt && tt <= TokenKind::EqualityLast;
}
inline bool TokenKindIsRelational(TokenKind tt) {
return TokenKind::RelOpStart <= tt && tt <= TokenKind::RelOpLast;
}
inline bool TokenKindIsShift(TokenKind tt) {
return TokenKind::ShiftOpStart <= tt && tt <= TokenKind::ShiftOpLast;
}
inline bool TokenKindIsAssignment(TokenKind tt) {
return TokenKind::AssignmentStart <= tt && tt <= TokenKind::AssignmentLast;
}
inline MOZ_MUST_USE bool TokenKindIsKeyword(TokenKind tt) {
return (TokenKind::KeywordFirst <= tt && tt <= TokenKind::KeywordLast) ||
(TokenKind::KeywordBinOpFirst <= tt &&
tt <= TokenKind::KeywordBinOpLast) ||
(TokenKind::KeywordUnOpFirst <= tt &&
tt <= TokenKind::KeywordUnOpLast);
}
inline MOZ_MUST_USE bool TokenKindIsContextualKeyword(TokenKind tt) {
return TokenKind::ContextualKeywordFirst <= tt &&
tt <= TokenKind::ContextualKeywordLast;
}
inline MOZ_MUST_USE bool TokenKindIsFutureReservedWord(TokenKind tt) {
return TokenKind::FutureReservedKeywordFirst <= tt &&
tt <= TokenKind::FutureReservedKeywordLast;
}
inline MOZ_MUST_USE bool TokenKindIsStrictReservedWord(TokenKind tt) {
return TokenKind::StrictReservedKeywordFirst <= tt &&
tt <= TokenKind::StrictReservedKeywordLast;
}
inline MOZ_MUST_USE bool TokenKindIsReservedWordLiteral(TokenKind tt) {
return TokenKind::ReservedWordLiteralFirst <= tt &&
tt <= TokenKind::ReservedWordLiteralLast;
}
inline MOZ_MUST_USE bool TokenKindIsReservedWord(TokenKind tt) {
return TokenKindIsKeyword(tt) || TokenKindIsFutureReservedWord(tt) ||
TokenKindIsReservedWordLiteral(tt);
}
inline MOZ_MUST_USE bool TokenKindIsPossibleIdentifier(TokenKind tt) {
return tt == TokenKind::Name || TokenKindIsContextualKeyword(tt) ||
TokenKindIsStrictReservedWord(tt);
}
inline MOZ_MUST_USE bool TokenKindIsPossibleIdentifierName(TokenKind tt) {
return TokenKindIsPossibleIdentifier(tt) || TokenKindIsReservedWord(tt);
}
} // namespace frontend
} // namespace js
#endif /* frontend_TokenKind_h */
|
