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1 | <?php |
2 | /** |
3 | * Copyright 2011 Paul Copperman <paul.copperman@gmail.com> |
4 | * Copyright 2018 Timo Tijhof |
5 | * Copyright 2021 Roan Kattouw <roan.kattouw@gmail.com> |
6 | * |
7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
8 | * you may not use this file except in compliance with the License. |
9 | * You may obtain a copy of the License at |
10 | * |
11 | * http://www.apache.org/licenses/LICENSE-2.0 |
12 | * |
13 | * Unless required by applicable law or agreed to in writing, software |
14 | * distributed under the License is distributed on an "AS IS" BASIS, |
15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
16 | * See the License for the specific language governing permissions and |
17 | * limitations under the License. |
18 | * |
19 | * @file |
20 | * @license Apache-2.0 |
21 | * @license MIT |
22 | * @license GPL-2.0-or-later |
23 | * @license LGPL-2.1-or-later |
24 | */ |
25 | |
26 | namespace Wikimedia\Minify; |
27 | |
28 | use ReflectionClass; |
29 | |
30 | /** |
31 | * JavaScript Minifier |
32 | * |
33 | * This class is meant to safely minify JavaScript code, while leaving syntactically correct |
34 | * programs intact. Other libraries, such as JSMin require a certain coding style to work |
35 | * correctly. OTOH, libraries like jsminplus, that do parse the code correctly are rather |
36 | * slow, because they construct a complete parse tree before outputting the code minified. |
37 | * So this class is meant to allow arbitrary (but syntactically correct) input, while being |
38 | * fast enough to be used for on-the-fly minifying. |
39 | * |
40 | * This class was written with ECMA-262 7th Edition in mind ("ECMAScript 2016"). Parsing features |
41 | * new to later editions of ECMAScript might not be supported. It's assumed that the input is |
42 | * syntactically correct; if it's not, this class may not detect that, and may produce incorrect |
43 | * output. |
44 | * |
45 | * This class has limited support for 8.0 spec ("ECMAScript 2017"), specifically, the await |
46 | * keyword, and most kinds of async functions are implemented. Other new parsing features of ES2017 |
47 | * are not yet supported. |
48 | * |
49 | * See also: |
50 | * - <https://262.ecma-international.org/7.0/> |
51 | * - <https://262.ecma-international.org/8.0/> |
52 | * - <https://262.ecma-international.org/11.0/> |
53 | */ |
54 | class JavaScriptMinifier { |
55 | |
56 | /* Parsing states. |
57 | * The state machine is necessary to decide whether to parse a slash as division |
58 | * operator or as regexp literal, and to know where semicolon insertion is possible. |
59 | * States are generally named after the next expected item. We only distinguish states when the |
60 | * distinction is relevant for our purpose. The meaning of these states is documented |
61 | * in $model below. |
62 | * |
63 | * Negative numbers are used to indicate that the state is inside a generator function, |
64 | * which changes the behavior of 'yield' |
65 | */ |
66 | private const STATEMENT = 1; |
67 | private const CONDITION = 2; |
68 | private const FUNC = 3; |
69 | private const GENFUNC = 4; |
70 | private const PROPERTY_ASSIGNMENT = 5; |
71 | private const EXPRESSION = 6; |
72 | private const EXPRESSION_NO_NL = 7; |
73 | private const EXPRESSION_OP = 8; |
74 | private const EXPRESSION_DOT = 9; |
75 | private const EXPRESSION_END = 10; |
76 | private const EXPRESSION_ARROWFUNC = 11; |
77 | private const EXPRESSION_TERNARY = 12; |
78 | private const EXPRESSION_TERNARY_OP = 13; |
79 | private const EXPRESSION_TERNARY_DOT = 14; |
80 | private const EXPRESSION_TERNARY_ARROWFUNC = 15; |
81 | private const PAREN_EXPRESSION = 16; |
82 | private const PAREN_EXPRESSION_OP = 17; |
83 | private const PAREN_EXPRESSION_DOT = 18; |
84 | private const PAREN_EXPRESSION_ARROWFUNC = 19; |
85 | private const PROPERTY_EXPRESSION = 20; |
86 | private const PROPERTY_EXPRESSION_OP = 21; |
87 | private const PROPERTY_EXPRESSION_DOT = 22; |
88 | private const PROPERTY_EXPRESSION_ARROWFUNC = 23; |
89 | private const CLASS_DEF = 24; |
90 | private const IMPORT_EXPORT = 25; |
91 | private const TEMPLATE_STRING_HEAD = 26; |
92 | private const TEMPLATE_STRING_TAIL = 27; |
93 | private const PAREN_EXPRESSION_OP_NO_NL = 28; |
94 | private const EXPRESSION_TERNARY_NO_NL = 29; |
95 | private const PAREN_EXPRESSION_NO_NL = 30; |
96 | private const PROPERTY_EXPRESSION_NO_NL = 31; |
97 | |
98 | /* Token types */ |
99 | |
100 | /** @var int unary operators */ |
101 | private const TYPE_UN_OP = 101; |
102 | |
103 | /** @var int ++ and -- */ |
104 | private const TYPE_INCR_OP = 102; |
105 | |
106 | /** @var int binary operators (except .) */ |
107 | private const TYPE_BIN_OP = 103; |
108 | |
109 | /** @var int + and - which can be either unary or binary ops */ |
110 | private const TYPE_ADD_OP = 104; |
111 | |
112 | /** @var int . */ |
113 | private const TYPE_DOT = 105; |
114 | |
115 | /** @var int ? */ |
116 | private const TYPE_HOOK = 106; |
117 | |
118 | /** @var int : */ |
119 | private const TYPE_COLON = 107; |
120 | |
121 | /** @var int , */ |
122 | private const TYPE_COMMA = 108; |
123 | |
124 | /** @var int ; */ |
125 | private const TYPE_SEMICOLON = 109; |
126 | |
127 | /** @var int { */ |
128 | private const TYPE_BRACE_OPEN = 110; |
129 | |
130 | /** @var int } */ |
131 | private const TYPE_BRACE_CLOSE = 111; |
132 | |
133 | /** @var int ( and [ */ |
134 | private const TYPE_PAREN_OPEN = 112; |
135 | |
136 | /** @var int ) and ] */ |
137 | private const TYPE_PAREN_CLOSE = 113; |
138 | |
139 | /** @var int => */ |
140 | private const TYPE_ARROW = 114; |
141 | |
142 | /** @var int keywords: break, continue, return, throw (and yield, if we're in a generator) */ |
143 | private const TYPE_RETURN = 115; |
144 | |
145 | /** @var int keywords: catch, for, with, switch, while, if */ |
146 | private const TYPE_IF = 116; |
147 | |
148 | /** @var int keywords: case, finally, else, do, try */ |
149 | private const TYPE_DO = 117; |
150 | |
151 | /** @var int keywords: var, let, const */ |
152 | private const TYPE_VAR = 118; |
153 | |
154 | /** @var int keywords: yield */ |
155 | private const TYPE_YIELD = 119; |
156 | |
157 | /** @var int keywords: function */ |
158 | private const TYPE_FUNC = 120; |
159 | |
160 | /** @var int keywords: class */ |
161 | private const TYPE_CLASS = 121; |
162 | |
163 | /** @var int all literals, identifiers, unrecognised tokens, and other keywords */ |
164 | private const TYPE_LITERAL = 122; |
165 | |
166 | /** @var int For special treatment of tokens that usually mean something else */ |
167 | private const TYPE_SPECIAL = 123; |
168 | |
169 | /** @var int keywords: async */ |
170 | private const TYPE_ASYNC = 124; |
171 | |
172 | /** @var int keywords: await */ |
173 | private const TYPE_AWAIT = 125; |
174 | |
175 | /** @var int Go to another state */ |
176 | private const ACTION_GOTO = 201; |
177 | |
178 | /** @var int Push a state to the stack */ |
179 | private const ACTION_PUSH = 202; |
180 | |
181 | /** @var int Pop the state from the top of the stack, and go to that state */ |
182 | private const ACTION_POP = 203; |
183 | |
184 | /** @var int Limit to avoid excessive memory usage */ |
185 | private const STACK_LIMIT = 1000; |
186 | |
187 | /** Length of the longest token in $tokenTypes made of punctuation characters, |
188 | * as defined in $opChars. Update this if you add longer tokens to $tokenTypes. |
189 | * |
190 | * Currently, the longest punctuation token is `>>>=`, which is 4 characters. |
191 | */ |
192 | private const LONGEST_PUNCTUATION_TOKEN = 4; |
193 | |
194 | /** |
195 | * @var int $maxLineLength |
196 | * |
197 | * Maximum line length |
198 | * |
199 | * This is not a strict maximum, but a guideline. Longer lines will be |
200 | * produced when literals (e.g. quoted strings) longer than this are |
201 | * encountered, or when required to guard against semicolon insertion. |
202 | * |
203 | * This is a private member (instead of constant) to allow tests to |
204 | * set it to 1, to verify ASI and line-breaking behaviour. |
205 | */ |
206 | private static $maxLineLength = 1000; |
207 | |
208 | private static bool $expandedStates = false; |
209 | |
210 | /** |
211 | * @var array $opChars |
212 | * |
213 | * Characters which can be combined without whitespace between them. |
214 | * Unlike the ECMAScript spec, we define these as individual symbols, not sequences. |
215 | */ |
216 | private static $opChars = [ |
217 | // ECMAScript 7.0 § 11.7 Punctuators |
218 | // |
219 | // Punctuator |
220 | // DivPunctuator |
221 | // RightBracePunctuator |
222 | // |
223 | '{' => true, |
224 | '(' => true, |
225 | ')' => true, |
226 | '[' => true, |
227 | ']' => true, |
228 | // Dots have a special case after $dotlessNum which require whitespace |
229 | '.' => true, |
230 | ';' => true, |
231 | ',' => true, |
232 | '<' => true, |
233 | '>' => true, |
234 | '=' => true, |
235 | '!' => true, |
236 | '+' => true, |
237 | '-' => true, |
238 | '*' => true, |
239 | '%' => true, |
240 | '&' => true, |
241 | '|' => true, |
242 | '^' => true, |
243 | '~' => true, |
244 | '?' => true, |
245 | ':' => true, |
246 | '/' => true, |
247 | '}' => true, |
248 | |
249 | // ECMAScript 7.0 § 11.8.4 String Literals |
250 | '"' => true, |
251 | "'" => true, |
252 | |
253 | // ECMAScript 7.0 § 11.8.6 Template Literal Lexical Components |
254 | '`' => true, |
255 | ]; |
256 | |
257 | /** |
258 | * @var array $tokenTypes |
259 | * |
260 | * Tokens and their types. |
261 | */ |
262 | private static $tokenTypes = [ |
263 | // ECMAScript 7.0 § 12.2 Primary Expression |
264 | // |
265 | // ...BindingIdentifier |
266 | // |
267 | '...' => self::TYPE_UN_OP, |
268 | |
269 | // ECMAScript 7.0 § 12.3 Left-Hand-Side Expressions |
270 | // |
271 | // MemberExpression |
272 | // |
273 | // A dot can also be part of a DecimalLiteral, but in that case we handle the entire |
274 | // DecimalLiteral as one token. A separate '.' token is always part of a MemberExpression. |
275 | '.' => self::TYPE_DOT, |
276 | |
277 | // ECMAScript 7.0 § 12.4 Update Expressions |
278 | // |
279 | // LeftHandSideExpression [no LineTerminator here] ++ |
280 | // LeftHandSideExpression [no LineTerminator here] -- |
281 | // ++ UnaryExpression |
282 | // -- UnaryExpression |
283 | // |
284 | // This is given a separate type from TYPE_UN_OP, |
285 | // because `++` and `--` require special handling |
286 | // around new lines and semicolon insertion. |
287 | // |
288 | '++' => self::TYPE_INCR_OP, |
289 | '--' => self::TYPE_INCR_OP, |
290 | |
291 | // ECMAScript 7.0 § 12.5 Unary Operators |
292 | // |
293 | // UnaryExpression |
294 | // includes UpdateExpression |
295 | // includes NewExpression, which defines 'new' |
296 | // |
297 | 'new' => self::TYPE_UN_OP, |
298 | 'delete' => self::TYPE_UN_OP, |
299 | 'void' => self::TYPE_UN_OP, |
300 | 'typeof' => self::TYPE_UN_OP, |
301 | '~' => self::TYPE_UN_OP, |
302 | '!' => self::TYPE_UN_OP, |
303 | |
304 | // These operators can be either binary or unary depending on context, |
305 | // and thus require separate type from TYPE_UN_OP and TYPE_BIN_OP. |
306 | // |
307 | // var z = +y; // unary (convert to number) |
308 | // var z = x + y; // binary (add operation) |
309 | // |
310 | // ECMAScript 7.0 § 12.5 Unary Operators |
311 | // |
312 | // + UnaryExpression |
313 | // - UnaryExpression |
314 | // |
315 | // ECMAScript 7.0 § 12.8 Additive Operators |
316 | // |
317 | // Expression + Expression |
318 | // Expression - Expression |
319 | // |
320 | '+' => self::TYPE_ADD_OP, |
321 | '-' => self::TYPE_ADD_OP, |
322 | |
323 | // These operators can be treated the same as binary operators. |
324 | // They are all defined in one of these two forms, and do |
325 | // not require special handling for preserving whitespace or |
326 | // line breaks. |
327 | // |
328 | // Expression operator Expression |
329 | // |
330 | // Defined in: |
331 | // - ECMAScript 7.0 § 12.6 Exponentiation Operator |
332 | // ExponentiationExpression |
333 | // - ECMAScript 7.0 § 12.7 Multiplicative Operators |
334 | // MultiplicativeOperator |
335 | // - ECMAScript 7.0 § 12.9 Bitwise Shift Operators |
336 | // ShiftExpression |
337 | // - ECMAScript 7.0 § 12.10 Relational Operators |
338 | // RelationalExpression |
339 | // - ECMAScript 7.0 § 12.11 Equality Operators |
340 | // EqualityExpression |
341 | '**' => self::TYPE_BIN_OP, |
342 | '*' => self::TYPE_BIN_OP, |
343 | '/' => self::TYPE_BIN_OP, |
344 | '%' => self::TYPE_BIN_OP, |
345 | '<<' => self::TYPE_BIN_OP, |
346 | '>>' => self::TYPE_BIN_OP, |
347 | '>>>' => self::TYPE_BIN_OP, |
348 | '<' => self::TYPE_BIN_OP, |
349 | '>' => self::TYPE_BIN_OP, |
350 | '<=' => self::TYPE_BIN_OP, |
351 | '>=' => self::TYPE_BIN_OP, |
352 | 'instanceof' => self::TYPE_BIN_OP, |
353 | 'in' => self::TYPE_BIN_OP, |
354 | '==' => self::TYPE_BIN_OP, |
355 | '!=' => self::TYPE_BIN_OP, |
356 | '===' => self::TYPE_BIN_OP, |
357 | '!==' => self::TYPE_BIN_OP, |
358 | |
359 | // ECMAScript 7.0 § 12.12 Binary Bitwise Operators |
360 | // |
361 | // BitwiseANDExpression |
362 | // BitwiseXORExpression |
363 | // BitwiseORExpression |
364 | // |
365 | '&' => self::TYPE_BIN_OP, |
366 | '^' => self::TYPE_BIN_OP, |
367 | '|' => self::TYPE_BIN_OP, |
368 | |
369 | // ECMAScript 7.0 § 12.13 Binary Logical Operators |
370 | // |
371 | // LogicalANDExpression |
372 | // LogicalORExpression |
373 | // |
374 | '&&' => self::TYPE_BIN_OP, |
375 | '||' => self::TYPE_BIN_OP, |
376 | |
377 | // ECMAScript 11.0 § 12.13 Binary Logical Operators |
378 | '??' => self::TYPE_BIN_OP, |
379 | |
380 | // ECMAScript 7.0 § 12.14 Conditional Operator |
381 | // |
382 | // ConditionalExpression: |
383 | // LogicalORExpression ? AssignmentExpression : AssignmentExpression |
384 | // |
385 | // Also known as ternary. |
386 | '?' => self::TYPE_HOOK, |
387 | ':' => self::TYPE_COLON, |
388 | |
389 | // ECMAScript 7.0 § 12.15 Assignment Operators |
390 | '=' => self::TYPE_BIN_OP, |
391 | '*=' => self::TYPE_BIN_OP, |
392 | '/=' => self::TYPE_BIN_OP, |
393 | '%=' => self::TYPE_BIN_OP, |
394 | '+=' => self::TYPE_BIN_OP, |
395 | '-=' => self::TYPE_BIN_OP, |
396 | '<<=' => self::TYPE_BIN_OP, |
397 | '>>=' => self::TYPE_BIN_OP, |
398 | '>>>=' => self::TYPE_BIN_OP, |
399 | '&=' => self::TYPE_BIN_OP, |
400 | '^=' => self::TYPE_BIN_OP, |
401 | '|=' => self::TYPE_BIN_OP, |
402 | '**=' => self::TYPE_BIN_OP, |
403 | |
404 | // ECMAScript 7.0 § 12.16 Comma Operator |
405 | ',' => self::TYPE_COMMA, |
406 | |
407 | // ECMAScript 7.0 § 11.9.1 Rules of Automatic Semicolon Insertion |
408 | // |
409 | // These keywords disallow LineTerminator before their (sometimes optional) |
410 | // Expression or Identifier. They are similar enough that we can treat |
411 | // them all the same way that we treat return, with regards to new line |
412 | // and semicolon insertion. |
413 | // |
414 | // keyword ; |
415 | // keyword [no LineTerminator here] Identifier ; |
416 | // keyword [no LineTerminator here] Expression ; |
417 | // |
418 | // See also ECMAScript 7.0: |
419 | // - § 13.8 The continue Statement |
420 | // - § 13.9 The break Statement |
421 | // - § 13.10 The return Statement |
422 | // - § 13.14 The throw Statement |
423 | // - § 14.4 Generator Function Definitions (yield) |
424 | 'continue' => self::TYPE_RETURN, |
425 | 'break' => self::TYPE_RETURN, |
426 | 'return' => self::TYPE_RETURN, |
427 | 'throw' => self::TYPE_RETURN, |
428 | // "yield" only counts as a keyword if when inside inside a generator functions, |
429 | // otherwise it is a regular identifier. |
430 | // This is handled with the negative states hack: if the state is negative, TYPE_YIELD |
431 | // is treated as TYPE_RETURN, if it's positive it's treated as TYPE_LITERAL |
432 | 'yield' => self::TYPE_YIELD, |
433 | |
434 | // These keywords require a parenthesised Expression or Identifier before the |
435 | // next Statement. They are similar enough to all treat like "if". |
436 | // |
437 | // keyword ( Expression ) Statement |
438 | // keyword ( Identifier ) Statement |
439 | // |
440 | // See also ECMAScript 7.0: |
441 | // - § 13.6 The if Statement |
442 | // - § 13.7 Iteration Statements (while, for) |
443 | // - § 13.11 The with Statement |
444 | // - § 13.12 The switch Statement |
445 | // - § 13.15 The try Statement (catch) |
446 | 'if' => self::TYPE_IF, |
447 | 'while' => self::TYPE_IF, |
448 | 'for' => self::TYPE_IF, |
449 | 'with' => self::TYPE_IF, |
450 | 'switch' => self::TYPE_IF, |
451 | 'catch' => self::TYPE_IF, |
452 | |
453 | // The keywords followed by a Statement, Expression, or Block. |
454 | // |
455 | // keyword Statement |
456 | // keyword Expression |
457 | // keyword Block |
458 | // |
459 | // See also ECMAScript 7.0: |
460 | // - § 13.6 The if Statement (else) |
461 | // - § 13.7 Iteration Statements (do) |
462 | // - § 13.12 The switch Statement (case) |
463 | // - § 13.15 The try Statement (try, finally) |
464 | 'else' => self::TYPE_DO, |
465 | 'do' => self::TYPE_DO, |
466 | 'case' => self::TYPE_DO, |
467 | 'try' => self::TYPE_DO, |
468 | 'finally' => self::TYPE_DO, |
469 | |
470 | // ECMAScript 7.0 § 13.3 Declarations and the Variable Statement |
471 | // |
472 | // LetOrConst |
473 | // VariableStatement |
474 | // |
475 | // These keywords are followed by a variable declaration statement. |
476 | // This needs to be treated differently from the TYPE_DO group, |
477 | // because for TYPE_VAR, when we see an "{" open curly brace, it |
478 | // begins object destructuring (ObjectBindingPattern), not a block. |
479 | 'var' => self::TYPE_VAR, |
480 | 'let' => self::TYPE_VAR, |
481 | 'const' => self::TYPE_VAR, |
482 | |
483 | // ECMAScript 7.0 § 14.1 Function Definitions |
484 | 'function' => self::TYPE_FUNC, |
485 | |
486 | // ECMAScript 7.0 § 14.2 Arrow Function Definitions |
487 | '=>' => self::TYPE_ARROW, |
488 | |
489 | // ECMAScript 7.0 § 14.5 Class Definitions |
490 | // |
491 | // class Identifier { ClassBody } |
492 | // class { ClassBody } |
493 | // class Identifier extends Expression { ClassBody } |
494 | // class extends Expression { ClassBody } |
495 | // |
496 | 'class' => self::TYPE_CLASS, |
497 | |
498 | // ECMAScript 8.0 § 14.6 AwaitExpression |
499 | // |
500 | // await UnaryExpression |
501 | // |
502 | 'await' => self::TYPE_AWAIT, |
503 | |
504 | // Can be one of: |
505 | // - Block (ECMAScript 7.0 § 13.2 Block) |
506 | // - ObjectLiteral (ECMAScript 7.0 § 12.2 Primary Expression) |
507 | '{' => self::TYPE_BRACE_OPEN, |
508 | '}' => self::TYPE_BRACE_CLOSE, |
509 | |
510 | // Can be one of: |
511 | // - Parenthesised Identifier or Expression after a |
512 | // TYPE_IF or TYPE_FUNC keyword. |
513 | // - PrimaryExpression (ECMAScript 7.0 § 12.2 Primary Expression) |
514 | // - CallExpression (ECMAScript 7.0 § 12.3 Left-Hand-Side Expressions) |
515 | // - Beginning of an ArrowFunction (ECMAScript 7.0 § 14.2 Arrow Function Definitions) |
516 | '(' => self::TYPE_PAREN_OPEN, |
517 | ')' => self::TYPE_PAREN_CLOSE, |
518 | |
519 | // Can be one of: |
520 | // - ArrayLiteral (ECMAScript 7.0 § 12.2 Primary Expressions) |
521 | // - ComputedPropertyName (ECMAScript 7.0 § 12.2.6 Object Initializer) |
522 | '[' => self::TYPE_PAREN_OPEN, |
523 | ']' => self::TYPE_PAREN_CLOSE, |
524 | |
525 | // Can be one of: |
526 | // - End of any statement |
527 | // - EmptyStatement (ECMAScript 7.0 § 13.4 Empty Statement) |
528 | ';' => self::TYPE_SEMICOLON, |
529 | |
530 | // ECMAScript 8.0 § 14.6 Async Function Definitions |
531 | // async [no LineTerminator here] function ... |
532 | // async [no LineTerminator here] propertyName() ... |
533 | 'async' => self::TYPE_ASYNC, |
534 | ]; |
535 | |
536 | /** |
537 | * @var array $model |
538 | * |
539 | * The main table for the state machine. Defines the desired action for every state/token pair. |
540 | * |
541 | * The state pushed onto the stack by ACTION_PUSH will be returned to by ACTION_POP. |
542 | * A state/token pair may not specify both ACTION_POP and ACTION_GOTO. If that does happen, |
543 | * ACTION_POP takes precedence. |
544 | * |
545 | * This table is augmented by self::ensureExpandedStates(). |
546 | */ |
547 | private static $model = [ |
548 | // Statement - This is the initial state. |
549 | self::STATEMENT => [ |
550 | self::TYPE_UN_OP => [ |
551 | self::ACTION_GOTO => self::EXPRESSION, |
552 | ], |
553 | self::TYPE_INCR_OP => [ |
554 | self::ACTION_GOTO => self::EXPRESSION, |
555 | ], |
556 | self::TYPE_ADD_OP => [ |
557 | self::ACTION_GOTO => self::EXPRESSION, |
558 | ], |
559 | self::TYPE_BRACE_OPEN => [ |
560 | // Use of '{' in statement context, creates a Block. |
561 | self::ACTION_PUSH => self::STATEMENT, |
562 | ], |
563 | self::TYPE_BRACE_CLOSE => [ |
564 | // Ends a Block |
565 | self::ACTION_POP => true, |
566 | ], |
567 | self::TYPE_PAREN_OPEN => [ |
568 | self::ACTION_PUSH => self::EXPRESSION_OP, |
569 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
570 | ], |
571 | self::TYPE_RETURN => [ |
572 | self::ACTION_GOTO => self::EXPRESSION_NO_NL, |
573 | ], |
574 | self::TYPE_IF => [ |
575 | self::ACTION_GOTO => self::CONDITION, |
576 | ], |
577 | self::TYPE_VAR => [ |
578 | self::ACTION_GOTO => self::EXPRESSION, |
579 | ], |
580 | self::TYPE_FUNC => [ |
581 | self::ACTION_PUSH => self::STATEMENT, |
582 | self::ACTION_GOTO => self::FUNC, |
583 | ], |
584 | self::TYPE_CLASS => [ |
585 | self::ACTION_PUSH => self::STATEMENT, |
586 | self::ACTION_GOTO => self::CLASS_DEF, |
587 | ], |
588 | self::TYPE_SPECIAL => [ |
589 | 'import' => [ |
590 | self::ACTION_GOTO => self::IMPORT_EXPORT, |
591 | ], |
592 | 'export' => [ |
593 | self::ACTION_GOTO => self::IMPORT_EXPORT, |
594 | ], |
595 | ], |
596 | self::TYPE_LITERAL => [ |
597 | self::ACTION_GOTO => self::EXPRESSION_OP, |
598 | ], |
599 | self::TYPE_ASYNC => [ |
600 | self::ACTION_GOTO => self::EXPRESSION_OP, |
601 | ], |
602 | self::TYPE_AWAIT => [ |
603 | self::ACTION_GOTO => self::EXPRESSION, |
604 | ], |
605 | ], |
606 | // The state after if/catch/while/for/switch/with |
607 | // Waits for an expression in parentheses, then goes to STATEMENT |
608 | self::CONDITION => [ |
609 | self::TYPE_PAREN_OPEN => [ |
610 | self::ACTION_PUSH => self::STATEMENT, |
611 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
612 | ], |
613 | ], |
614 | // The state after the function keyword. Waits for {, then goes to STATEMENT. |
615 | // The function body's closing } will pop the stack, so the state to return to |
616 | // after the function should be pushed to the stack first |
617 | self::FUNC => [ |
618 | // Needed to prevent * in an expression in the argument list from improperly |
619 | // triggering GENFUNC |
620 | self::TYPE_PAREN_OPEN => [ |
621 | self::ACTION_PUSH => self::FUNC, |
622 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
623 | ], |
624 | self::TYPE_BRACE_OPEN => [ |
625 | self::ACTION_GOTO => self::STATEMENT, |
626 | ], |
627 | self::TYPE_SPECIAL => [ |
628 | '*' => [ |
629 | self::ACTION_GOTO => self::GENFUNC, |
630 | ], |
631 | ], |
632 | ], |
633 | // After function*. Waits for { , then goes to a generator function statement. |
634 | self::GENFUNC => [ |
635 | self::TYPE_BRACE_OPEN => [ |
636 | // Note negative value: generator function states are negative |
637 | self::ACTION_GOTO => -self::STATEMENT |
638 | ], |
639 | ], |
640 | // Property assignment - This is an object literal declaration. |
641 | // For example: `{ key: value, key2, [computedKey3]: value3, method4() { ... } }` |
642 | self::PROPERTY_ASSIGNMENT => [ |
643 | // Note that keywords like if, class, var, delete, instanceof etc. can be used as keys, |
644 | // and should be treated as literals here, as they are in EXPRESSION_DOT. In this state, |
645 | // that is implicitly true because TYPE_LITERAL has no action, so it stays in this state. |
646 | // If we later add a state transition for TYPE_LITERAL, that same transition should |
647 | // also be applied to TYPE_RETURN, TYPE_IF, TYPE_DO, TYPE_VAR, TYPE_FUNC and TYPE_CLASS. |
648 | self::TYPE_COLON => [ |
649 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION, |
650 | ], |
651 | // For {, which begins a method |
652 | self::TYPE_BRACE_OPEN => [ |
653 | self::ACTION_PUSH => self::PROPERTY_ASSIGNMENT, |
654 | // This is not flipped, see "Special cases" below |
655 | self::ACTION_GOTO => self::STATEMENT, |
656 | ], |
657 | self::TYPE_BRACE_CLOSE => [ |
658 | self::ACTION_POP => true, |
659 | ], |
660 | // For [, which begins a computed key |
661 | self::TYPE_PAREN_OPEN => [ |
662 | self::ACTION_PUSH => self::PROPERTY_ASSIGNMENT, |
663 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
664 | ], |
665 | self::TYPE_SPECIAL => [ |
666 | '*' => [ |
667 | self::ACTION_PUSH => self::PROPERTY_ASSIGNMENT, |
668 | self::ACTION_GOTO => self::GENFUNC, |
669 | ], |
670 | ], |
671 | ], |
672 | // Place in an expression where we expect an operand or a unary operator: the start |
673 | // of an expression or after an operator. Note that unary operators (including INCR_OP |
674 | // and ADD_OP) cause us to stay in this state, while operands take us to EXPRESSION_OP |
675 | self::EXPRESSION => [ |
676 | self::TYPE_SEMICOLON => [ |
677 | self::ACTION_GOTO => self::STATEMENT, |
678 | ], |
679 | self::TYPE_BRACE_OPEN => [ |
680 | self::ACTION_PUSH => self::EXPRESSION_OP, |
681 | self::ACTION_GOTO => self::PROPERTY_ASSIGNMENT, |
682 | ], |
683 | self::TYPE_BRACE_CLOSE => [ |
684 | self::ACTION_POP => true, |
685 | ], |
686 | self::TYPE_PAREN_OPEN => [ |
687 | self::ACTION_PUSH => self::EXPRESSION_OP, |
688 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
689 | ], |
690 | self::TYPE_FUNC => [ |
691 | self::ACTION_PUSH => self::EXPRESSION_OP, |
692 | self::ACTION_GOTO => self::FUNC, |
693 | ], |
694 | self::TYPE_CLASS => [ |
695 | self::ACTION_PUSH => self::EXPRESSION_OP, |
696 | self::ACTION_GOTO => self::CLASS_DEF, |
697 | ], |
698 | self::TYPE_LITERAL => [ |
699 | self::ACTION_GOTO => self::EXPRESSION_OP, |
700 | ], |
701 | self::TYPE_ASYNC => [ |
702 | self::ACTION_GOTO => self::EXPRESSION_OP, |
703 | ], |
704 | // 'return' can't appear here, but 'yield' can |
705 | self::TYPE_RETURN => [ |
706 | self::ACTION_GOTO => self::EXPRESSION_NO_NL, |
707 | ], |
708 | ], |
709 | // An expression immediately after return/throw/break/continue/yield, where a newline |
710 | // is not allowed. This state is identical to EXPRESSION, except that semicolon |
711 | // insertion can happen here, and we (almost) never stay here: in cases where EXPRESSION |
712 | // would do nothing, we go to EXPRESSION. We only stay here if there's a double yield, |
713 | // because 'yield yield foo' is a valid expression. |
714 | self::EXPRESSION_NO_NL => [ |
715 | self::TYPE_UN_OP => [ |
716 | self::ACTION_GOTO => self::EXPRESSION, |
717 | ], |
718 | self::TYPE_INCR_OP => [ |
719 | self::ACTION_GOTO => self::EXPRESSION, |
720 | ], |
721 | // BIN_OP seems impossible at the start of an expression, but it can happen in |
722 | // yield *foo |
723 | self::TYPE_BIN_OP => [ |
724 | self::ACTION_GOTO => self::EXPRESSION, |
725 | ], |
726 | self::TYPE_ADD_OP => [ |
727 | self::ACTION_GOTO => self::EXPRESSION, |
728 | ], |
729 | self::TYPE_SEMICOLON => [ |
730 | self::ACTION_GOTO => self::STATEMENT, |
731 | ], |
732 | self::TYPE_BRACE_OPEN => [ |
733 | self::ACTION_PUSH => self::EXPRESSION_OP, |
734 | self::ACTION_GOTO => self::PROPERTY_ASSIGNMENT, |
735 | ], |
736 | self::TYPE_BRACE_CLOSE => [ |
737 | self::ACTION_POP => true, |
738 | ], |
739 | self::TYPE_PAREN_OPEN => [ |
740 | self::ACTION_PUSH => self::EXPRESSION_OP, |
741 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
742 | ], |
743 | self::TYPE_FUNC => [ |
744 | self::ACTION_PUSH => self::EXPRESSION_OP, |
745 | self::ACTION_GOTO => self::FUNC, |
746 | ], |
747 | self::TYPE_CLASS => [ |
748 | self::ACTION_PUSH => self::EXPRESSION_OP, |
749 | self::ACTION_GOTO => self::CLASS_DEF, |
750 | ], |
751 | self::TYPE_LITERAL => [ |
752 | self::ACTION_GOTO => self::EXPRESSION_OP, |
753 | ], |
754 | self::TYPE_ASYNC => [ |
755 | self::ACTION_GOTO => self::EXPRESSION_OP, |
756 | ], |
757 | self::TYPE_AWAIT => [ |
758 | self::ACTION_GOTO => self::EXPRESSION, |
759 | ], |
760 | // 'return' can't appear here, because 'return return' isn't allowed |
761 | // But 'yield' can appear here, because 'yield yield' is allowed |
762 | self::TYPE_RETURN => [ |
763 | self::ACTION_GOTO => self::EXPRESSION_NO_NL, |
764 | ], |
765 | ], |
766 | // Place in an expression after an operand, where we expect an operator |
767 | self::EXPRESSION_OP => [ |
768 | self::TYPE_BIN_OP => [ |
769 | self::ACTION_GOTO => self::EXPRESSION, |
770 | ], |
771 | self::TYPE_ADD_OP => [ |
772 | self::ACTION_GOTO => self::EXPRESSION, |
773 | ], |
774 | self::TYPE_DOT => [ |
775 | self::ACTION_GOTO => self::EXPRESSION_DOT, |
776 | ], |
777 | self::TYPE_HOOK => [ |
778 | self::ACTION_PUSH => self::EXPRESSION, |
779 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
780 | ], |
781 | self::TYPE_COLON => [ |
782 | self::ACTION_GOTO => self::STATEMENT, |
783 | ], |
784 | self::TYPE_COMMA => [ |
785 | self::ACTION_GOTO => self::EXPRESSION, |
786 | ], |
787 | self::TYPE_SEMICOLON => [ |
788 | self::ACTION_GOTO => self::STATEMENT, |
789 | ], |
790 | self::TYPE_ARROW => [ |
791 | self::ACTION_GOTO => self::EXPRESSION_ARROWFUNC, |
792 | ], |
793 | self::TYPE_PAREN_OPEN => [ |
794 | self::ACTION_PUSH => self::EXPRESSION_OP, |
795 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
796 | ], |
797 | self::TYPE_BRACE_CLOSE => [ |
798 | self::ACTION_POP => true, |
799 | ], |
800 | self::TYPE_FUNC => [ |
801 | self::ACTION_PUSH => self::EXPRESSION_OP, |
802 | self::ACTION_GOTO => self::FUNC, |
803 | ], |
804 | ], |
805 | // State after a dot (.). Like EXPRESSION, except that many keywords behave like literals |
806 | // (e.g. class, if, else, var, function) because they're not valid as identifiers but are |
807 | // valid as property names. |
808 | self::EXPRESSION_DOT => [ |
809 | self::TYPE_LITERAL => [ |
810 | self::ACTION_GOTO => self::EXPRESSION_OP, |
811 | ], |
812 | // The following are keywords behaving as literals |
813 | self::TYPE_RETURN => [ |
814 | self::ACTION_GOTO => self::EXPRESSION_OP, |
815 | ], |
816 | self::TYPE_IF => [ |
817 | self::ACTION_GOTO => self::EXPRESSION_OP, |
818 | ], |
819 | self::TYPE_DO => [ |
820 | self::ACTION_GOTO => self::EXPRESSION_OP, |
821 | ], |
822 | self::TYPE_VAR => [ |
823 | self::ACTION_GOTO => self::EXPRESSION_OP, |
824 | ], |
825 | self::TYPE_FUNC => [ |
826 | self::ACTION_GOTO => self::EXPRESSION_OP, |
827 | ], |
828 | self::TYPE_CLASS => [ |
829 | self::ACTION_GOTO => self::EXPRESSION_OP, |
830 | ], |
831 | // We don't expect real unary/binary operators here, but some keywords |
832 | // (new, delete, void, typeof, instanceof, in) are classified as such, and they can be |
833 | // used as property names |
834 | self::TYPE_UN_OP => [ |
835 | self::ACTION_GOTO => self::EXPRESSION_OP, |
836 | ], |
837 | self::TYPE_BIN_OP => [ |
838 | self::ACTION_GOTO => self::EXPRESSION_OP, |
839 | ], |
840 | ], |
841 | // State after the } closing an arrow function body: like STATEMENT except |
842 | // that it has semicolon insertion, COMMA can continue the expression, and after |
843 | // a function we go to STATEMENT instead of EXPRESSION_OP |
844 | self::EXPRESSION_END => [ |
845 | self::TYPE_UN_OP => [ |
846 | self::ACTION_GOTO => self::EXPRESSION, |
847 | ], |
848 | self::TYPE_INCR_OP => [ |
849 | self::ACTION_GOTO => self::EXPRESSION, |
850 | ], |
851 | self::TYPE_ADD_OP => [ |
852 | self::ACTION_GOTO => self::EXPRESSION, |
853 | ], |
854 | self::TYPE_COMMA => [ |
855 | self::ACTION_GOTO => self::EXPRESSION, |
856 | ], |
857 | self::TYPE_SEMICOLON => [ |
858 | self::ACTION_GOTO => self::STATEMENT, |
859 | ], |
860 | self::TYPE_BRACE_OPEN => [ |
861 | self::ACTION_PUSH => self::STATEMENT, |
862 | self::ACTION_GOTO => self::STATEMENT, |
863 | ], |
864 | self::TYPE_BRACE_CLOSE => [ |
865 | self::ACTION_POP => true, |
866 | ], |
867 | self::TYPE_PAREN_OPEN => [ |
868 | self::ACTION_PUSH => self::EXPRESSION_OP, |
869 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
870 | ], |
871 | self::TYPE_RETURN => [ |
872 | self::ACTION_GOTO => self::EXPRESSION_NO_NL, |
873 | ], |
874 | self::TYPE_IF => [ |
875 | self::ACTION_GOTO => self::CONDITION, |
876 | ], |
877 | self::TYPE_VAR => [ |
878 | self::ACTION_GOTO => self::EXPRESSION, |
879 | ], |
880 | self::TYPE_FUNC => [ |
881 | self::ACTION_PUSH => self::STATEMENT, |
882 | self::ACTION_GOTO => self::FUNC, |
883 | ], |
884 | self::TYPE_CLASS => [ |
885 | self::ACTION_PUSH => self::STATEMENT, |
886 | self::ACTION_GOTO => self::CLASS_DEF, |
887 | ], |
888 | self::TYPE_LITERAL => [ |
889 | self::ACTION_GOTO => self::EXPRESSION_OP, |
890 | ], |
891 | self::TYPE_ASYNC => [ |
892 | self::ACTION_GOTO => self::EXPRESSION_OP, |
893 | ], |
894 | ], |
895 | // State after =>. Like EXPRESSION, except that { begins an arrow function body |
896 | // rather than an object literal. |
897 | self::EXPRESSION_ARROWFUNC => [ |
898 | self::TYPE_UN_OP => [ |
899 | self::ACTION_GOTO => self::EXPRESSION, |
900 | ], |
901 | self::TYPE_INCR_OP => [ |
902 | self::ACTION_GOTO => self::EXPRESSION, |
903 | ], |
904 | self::TYPE_ADD_OP => [ |
905 | self::ACTION_GOTO => self::EXPRESSION, |
906 | ], |
907 | self::TYPE_BRACE_OPEN => [ |
908 | self::ACTION_PUSH => self::EXPRESSION_END, |
909 | self::ACTION_GOTO => self::STATEMENT, |
910 | ], |
911 | self::TYPE_PAREN_OPEN => [ |
912 | self::ACTION_PUSH => self::EXPRESSION_OP, |
913 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
914 | ], |
915 | self::TYPE_FUNC => [ |
916 | self::ACTION_PUSH => self::EXPRESSION_OP, |
917 | self::ACTION_GOTO => self::FUNC, |
918 | ], |
919 | self::TYPE_CLASS => [ |
920 | self::ACTION_PUSH => self::EXPRESSION_OP, |
921 | self::ACTION_GOTO => self::CLASS_DEF, |
922 | ], |
923 | self::TYPE_LITERAL => [ |
924 | self::ACTION_GOTO => self::EXPRESSION_OP, |
925 | ], |
926 | ], |
927 | // Expression after a ? . This differs from EXPRESSION because a : ends the ternary |
928 | // rather than starting STATEMENT (outside a ternary, : comes after a goto label) |
929 | // The actual rule for : ending the ternary is in EXPRESSION_TERNARY_OP. |
930 | self::EXPRESSION_TERNARY => [ |
931 | self::TYPE_BRACE_OPEN => [ |
932 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
933 | self::ACTION_GOTO => self::PROPERTY_ASSIGNMENT, |
934 | ], |
935 | self::TYPE_PAREN_OPEN => [ |
936 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
937 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
938 | ], |
939 | self::TYPE_FUNC => [ |
940 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
941 | self::ACTION_GOTO => self::FUNC, |
942 | ], |
943 | self::TYPE_CLASS => [ |
944 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
945 | self::ACTION_GOTO => self::CLASS_DEF, |
946 | ], |
947 | self::TYPE_LITERAL => [ |
948 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
949 | ], |
950 | // 'return' can't appear here, but 'yield' can |
951 | self::TYPE_RETURN => [ |
952 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_NO_NL, |
953 | ], |
954 | ], |
955 | // Like EXPRESSION_TERNARY, except that semicolon insertion can happen |
956 | // See also EXPRESSION_NO_NL |
957 | self::EXPRESSION_TERNARY_NO_NL => [ |
958 | self::TYPE_BRACE_OPEN => [ |
959 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
960 | self::ACTION_GOTO => self::PROPERTY_ASSIGNMENT, |
961 | ], |
962 | self::TYPE_PAREN_OPEN => [ |
963 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
964 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
965 | ], |
966 | self::TYPE_FUNC => [ |
967 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
968 | self::ACTION_GOTO => self::FUNC, |
969 | ], |
970 | self::TYPE_CLASS => [ |
971 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
972 | self::ACTION_GOTO => self::CLASS_DEF, |
973 | ], |
974 | self::TYPE_LITERAL => [ |
975 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
976 | ], |
977 | // 'yield' can appear here, because 'yield yield' is allowed |
978 | self::TYPE_RETURN => [ |
979 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_NO_NL, |
980 | ], |
981 | self::TYPE_UN_OP => [ |
982 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
983 | ], |
984 | self::TYPE_INCR_OP => [ |
985 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
986 | ], |
987 | // BIN_OP seems impossible at the start of an expression, but it can happen in |
988 | // yield *foo |
989 | self::TYPE_BIN_OP => [ |
990 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
991 | ], |
992 | self::TYPE_ADD_OP => [ |
993 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
994 | ], |
995 | ], |
996 | // Like EXPRESSION_OP, but for ternaries, see EXPRESSION_TERNARY |
997 | self::EXPRESSION_TERNARY_OP => [ |
998 | self::TYPE_BIN_OP => [ |
999 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
1000 | ], |
1001 | self::TYPE_ADD_OP => [ |
1002 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
1003 | ], |
1004 | self::TYPE_DOT => [ |
1005 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_DOT, |
1006 | ], |
1007 | self::TYPE_HOOK => [ |
1008 | self::ACTION_PUSH => self::EXPRESSION_TERNARY, |
1009 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
1010 | ], |
1011 | self::TYPE_COMMA => [ |
1012 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
1013 | ], |
1014 | self::TYPE_ARROW => [ |
1015 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_ARROWFUNC, |
1016 | ], |
1017 | self::TYPE_PAREN_OPEN => [ |
1018 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
1019 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1020 | ], |
1021 | self::TYPE_COLON => [ |
1022 | self::ACTION_POP => true, |
1023 | ], |
1024 | ], |
1025 | // Like EXPRESSION_DOT, but for ternaries, see EXPRESSION_TERNARY |
1026 | self::EXPRESSION_TERNARY_DOT => [ |
1027 | self::TYPE_LITERAL => [ |
1028 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
1029 | ], |
1030 | // The following are keywords behaving as literals |
1031 | self::TYPE_RETURN => [ |
1032 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
1033 | ], |
1034 | self::TYPE_IF => [ |
1035 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
1036 | ], |
1037 | self::TYPE_DO => [ |
1038 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
1039 | ], |
1040 | self::TYPE_VAR => [ |
1041 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
1042 | ], |
1043 | self::TYPE_FUNC => [ |
1044 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
1045 | ], |
1046 | self::TYPE_CLASS => [ |
1047 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
1048 | ], |
1049 | // We don't expect real unary/binary operators here, but some keywords |
1050 | // (new, delete, void, typeof, instanceof, in) are classified as such, and they can be |
1051 | // used as property names |
1052 | self::TYPE_UN_OP => [ |
1053 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
1054 | ], |
1055 | self::TYPE_BIN_OP => [ |
1056 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
1057 | ], |
1058 | ], |
1059 | // Like EXPRESSION_ARROWFUNC, but for ternaries, see EXPRESSION_TERNARY |
1060 | self::EXPRESSION_TERNARY_ARROWFUNC => [ |
1061 | self::TYPE_UN_OP => [ |
1062 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
1063 | ], |
1064 | self::TYPE_INCR_OP => [ |
1065 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
1066 | ], |
1067 | self::TYPE_ADD_OP => [ |
1068 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
1069 | ], |
1070 | self::TYPE_BRACE_OPEN => [ |
1071 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
1072 | self::ACTION_GOTO => self::STATEMENT, |
1073 | ], |
1074 | self::TYPE_PAREN_OPEN => [ |
1075 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
1076 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1077 | ], |
1078 | self::TYPE_FUNC => [ |
1079 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
1080 | self::ACTION_GOTO => self::FUNC, |
1081 | ], |
1082 | self::TYPE_CLASS => [ |
1083 | self::ACTION_PUSH => self::EXPRESSION_TERNARY_OP, |
1084 | self::ACTION_GOTO => self::CLASS_DEF, |
1085 | ], |
1086 | self::TYPE_LITERAL => [ |
1087 | self::ACTION_GOTO => self::EXPRESSION_TERNARY_OP, |
1088 | ], |
1089 | ], |
1090 | // Expression inside parentheses. Like EXPRESSION, except that ) ends this state |
1091 | // This differs from EXPRESSION because semicolon insertion can't happen here |
1092 | self::PAREN_EXPRESSION => [ |
1093 | self::TYPE_BRACE_OPEN => [ |
1094 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1095 | self::ACTION_GOTO => self::PROPERTY_ASSIGNMENT, |
1096 | ], |
1097 | self::TYPE_PAREN_OPEN => [ |
1098 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1099 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1100 | ], |
1101 | self::TYPE_PAREN_CLOSE => [ |
1102 | self::ACTION_POP => true, |
1103 | ], |
1104 | self::TYPE_FUNC => [ |
1105 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1106 | self::ACTION_GOTO => self::FUNC, |
1107 | ], |
1108 | self::TYPE_CLASS => [ |
1109 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1110 | self::ACTION_GOTO => self::CLASS_DEF, |
1111 | ], |
1112 | self::TYPE_LITERAL => [ |
1113 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1114 | ], |
1115 | self::TYPE_ASYNC => [ |
1116 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP_NO_NL, |
1117 | ], |
1118 | // 'return' can't appear here, but 'yield' can |
1119 | self::TYPE_RETURN => [ |
1120 | self::ACTION_GOTO => self::PAREN_EXPRESSION_NO_NL, |
1121 | ], |
1122 | ], |
1123 | // Like PAREN_EXPRESSION, except that semicolon insertion can happen |
1124 | // See also EXPRESSION_NO_NL |
1125 | self::PAREN_EXPRESSION_NO_NL => [ |
1126 | self::TYPE_BRACE_OPEN => [ |
1127 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1128 | self::ACTION_GOTO => self::PROPERTY_ASSIGNMENT, |
1129 | ], |
1130 | self::TYPE_PAREN_OPEN => [ |
1131 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1132 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1133 | ], |
1134 | self::TYPE_PAREN_CLOSE => [ |
1135 | self::ACTION_POP => true, |
1136 | ], |
1137 | self::TYPE_FUNC => [ |
1138 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1139 | self::ACTION_GOTO => self::FUNC, |
1140 | ], |
1141 | self::TYPE_CLASS => [ |
1142 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1143 | self::ACTION_GOTO => self::CLASS_DEF, |
1144 | ], |
1145 | self::TYPE_LITERAL => [ |
1146 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1147 | ], |
1148 | self::TYPE_ASYNC => [ |
1149 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP_NO_NL, |
1150 | ], |
1151 | // 'yield' can appear here, because 'yield yield' is allowed |
1152 | self::TYPE_RETURN => [ |
1153 | self::ACTION_GOTO => self::PAREN_EXPRESSION_NO_NL, |
1154 | ], |
1155 | self::TYPE_UN_OP => [ |
1156 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1157 | ], |
1158 | self::TYPE_INCR_OP => [ |
1159 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1160 | ], |
1161 | // BIN_OP seems impossible at the start of an expression, but it can happen in |
1162 | // yield *foo |
1163 | self::TYPE_BIN_OP => [ |
1164 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1165 | ], |
1166 | self::TYPE_ADD_OP => [ |
1167 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1168 | ], |
1169 | self::TYPE_AWAIT => [ |
1170 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1171 | ], |
1172 | ], |
1173 | // Like EXPRESSION_OP, but in parentheses, see PAREN_EXPRESSION |
1174 | self::PAREN_EXPRESSION_OP => [ |
1175 | self::TYPE_BIN_OP => [ |
1176 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1177 | ], |
1178 | self::TYPE_ADD_OP => [ |
1179 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1180 | ], |
1181 | self::TYPE_DOT => [ |
1182 | self::ACTION_GOTO => self::PAREN_EXPRESSION_DOT, |
1183 | ], |
1184 | self::TYPE_HOOK => [ |
1185 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1186 | ], |
1187 | self::TYPE_COLON => [ |
1188 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1189 | ], |
1190 | self::TYPE_COMMA => [ |
1191 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1192 | ], |
1193 | self::TYPE_SEMICOLON => [ |
1194 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1195 | ], |
1196 | self::TYPE_ARROW => [ |
1197 | self::ACTION_GOTO => self::PAREN_EXPRESSION_ARROWFUNC, |
1198 | ], |
1199 | self::TYPE_PAREN_OPEN => [ |
1200 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1201 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1202 | ], |
1203 | self::TYPE_PAREN_CLOSE => [ |
1204 | self::ACTION_POP => true, |
1205 | ], |
1206 | ], |
1207 | // Like EXPRESSION_DOT, but in parentheses, see PAREN_EXPRESSION |
1208 | self::PAREN_EXPRESSION_DOT => [ |
1209 | self::TYPE_LITERAL => [ |
1210 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1211 | ], |
1212 | // The following are keywords behaving as literals |
1213 | self::TYPE_RETURN => [ |
1214 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1215 | ], |
1216 | self::TYPE_IF => [ |
1217 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1218 | ], |
1219 | self::TYPE_DO => [ |
1220 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1221 | ], |
1222 | self::TYPE_VAR => [ |
1223 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1224 | ], |
1225 | self::TYPE_FUNC => [ |
1226 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1227 | ], |
1228 | self::TYPE_CLASS => [ |
1229 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1230 | ], |
1231 | // We don't expect real unary/binary operators here, but some keywords |
1232 | // (new, delete, void, typeof, instanceof, in) are classified as such, and they can be |
1233 | // used as property names |
1234 | self::TYPE_UN_OP => [ |
1235 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1236 | ], |
1237 | self::TYPE_BIN_OP => [ |
1238 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1239 | ], |
1240 | ], |
1241 | // Like EXPRESSION_ARROWFUNC, but in parentheses, see PAREN_EXPRESSION |
1242 | self::PAREN_EXPRESSION_ARROWFUNC => [ |
1243 | self::TYPE_UN_OP => [ |
1244 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1245 | ], |
1246 | self::TYPE_INCR_OP => [ |
1247 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1248 | ], |
1249 | self::TYPE_ADD_OP => [ |
1250 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1251 | ], |
1252 | self::TYPE_BRACE_OPEN => [ |
1253 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1254 | self::ACTION_GOTO => self::STATEMENT, |
1255 | ], |
1256 | self::TYPE_PAREN_OPEN => [ |
1257 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1258 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1259 | ], |
1260 | self::TYPE_FUNC => [ |
1261 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1262 | self::ACTION_GOTO => self::FUNC, |
1263 | ], |
1264 | self::TYPE_CLASS => [ |
1265 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1266 | self::ACTION_GOTO => self::CLASS_DEF, |
1267 | ], |
1268 | self::TYPE_LITERAL => [ |
1269 | self::ACTION_GOTO => self::PAREN_EXPRESSION_OP, |
1270 | ], |
1271 | ], |
1272 | |
1273 | // Like PAREN_EXPRESSION_OP, for the state after "async" in a PAREN_EXPRESSION, |
1274 | // for use by the $semicolon model. |
1275 | self::PAREN_EXPRESSION_OP_NO_NL => [ |
1276 | self::TYPE_BIN_OP => [ |
1277 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1278 | ], |
1279 | self::TYPE_ADD_OP => [ |
1280 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1281 | ], |
1282 | self::TYPE_DOT => [ |
1283 | self::ACTION_GOTO => self::PAREN_EXPRESSION_DOT, |
1284 | ], |
1285 | self::TYPE_HOOK => [ |
1286 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1287 | ], |
1288 | self::TYPE_COLON => [ |
1289 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1290 | ], |
1291 | self::TYPE_COMMA => [ |
1292 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1293 | ], |
1294 | self::TYPE_SEMICOLON => [ |
1295 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1296 | ], |
1297 | self::TYPE_ARROW => [ |
1298 | self::ACTION_GOTO => self::PAREN_EXPRESSION_ARROWFUNC, |
1299 | ], |
1300 | self::TYPE_PAREN_OPEN => [ |
1301 | self::ACTION_PUSH => self::PAREN_EXPRESSION_OP, |
1302 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1303 | ], |
1304 | self::TYPE_PAREN_CLOSE => [ |
1305 | self::ACTION_POP => true, |
1306 | ], |
1307 | ], |
1308 | // Expression as the value of a key in an object literal. Like EXPRESSION, except that |
1309 | // a comma (in PROPERTY_EXPRESSION_OP) goes to PROPERTY_ASSIGNMENT instead |
1310 | self::PROPERTY_EXPRESSION => [ |
1311 | self::TYPE_BRACE_OPEN => [ |
1312 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1313 | self::ACTION_GOTO => self::PROPERTY_ASSIGNMENT, |
1314 | ], |
1315 | self::TYPE_BRACE_CLOSE => [ |
1316 | self::ACTION_POP => true, |
1317 | ], |
1318 | self::TYPE_PAREN_OPEN => [ |
1319 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1320 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1321 | ], |
1322 | self::TYPE_FUNC => [ |
1323 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1324 | self::ACTION_GOTO => self::FUNC, |
1325 | ], |
1326 | self::TYPE_CLASS => [ |
1327 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1328 | self::ACTION_GOTO => self::CLASS_DEF, |
1329 | ], |
1330 | self::TYPE_LITERAL => [ |
1331 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1332 | ], |
1333 | // 'return' can't appear here, but 'yield' can |
1334 | self::TYPE_RETURN => [ |
1335 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_NO_NL, |
1336 | ], |
1337 | ], |
1338 | // Like PROPERTY_EXPRESSION, except that semicolon insertion can happen |
1339 | // See also EXPRESSION_NO_NL |
1340 | self::PROPERTY_EXPRESSION_NO_NL => [ |
1341 | self::TYPE_BRACE_OPEN => [ |
1342 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1343 | self::ACTION_GOTO => self::PROPERTY_ASSIGNMENT, |
1344 | ], |
1345 | self::TYPE_BRACE_CLOSE => [ |
1346 | self::ACTION_POP => true, |
1347 | ], |
1348 | self::TYPE_PAREN_OPEN => [ |
1349 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1350 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1351 | ], |
1352 | self::TYPE_FUNC => [ |
1353 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1354 | self::ACTION_GOTO => self::FUNC, |
1355 | ], |
1356 | self::TYPE_CLASS => [ |
1357 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1358 | self::ACTION_GOTO => self::CLASS_DEF, |
1359 | ], |
1360 | self::TYPE_LITERAL => [ |
1361 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1362 | ], |
1363 | // 'yield' can appear here, because 'yield yield' is allowed |
1364 | self::TYPE_RETURN => [ |
1365 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_NO_NL, |
1366 | ], |
1367 | self::TYPE_UN_OP => [ |
1368 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION, |
1369 | ], |
1370 | self::TYPE_INCR_OP => [ |
1371 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION, |
1372 | ], |
1373 | // BIN_OP seems impossible at the start of an expression, but it can happen in |
1374 | // yield *foo |
1375 | self::TYPE_BIN_OP => [ |
1376 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION, |
1377 | ], |
1378 | self::TYPE_ADD_OP => [ |
1379 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION, |
1380 | ], |
1381 | ], |
1382 | // Like EXPRESSION_OP, but in a property expression, see PROPERTY_EXPRESSION |
1383 | self::PROPERTY_EXPRESSION_OP => [ |
1384 | self::TYPE_BIN_OP => [ |
1385 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION, |
1386 | ], |
1387 | self::TYPE_ADD_OP => [ |
1388 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION, |
1389 | ], |
1390 | self::TYPE_DOT => [ |
1391 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_DOT, |
1392 | ], |
1393 | self::TYPE_HOOK => [ |
1394 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION, |
1395 | self::ACTION_GOTO => self::EXPRESSION_TERNARY, |
1396 | ], |
1397 | self::TYPE_COMMA => [ |
1398 | self::ACTION_GOTO => self::PROPERTY_ASSIGNMENT, |
1399 | ], |
1400 | self::TYPE_ARROW => [ |
1401 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_ARROWFUNC, |
1402 | ], |
1403 | self::TYPE_BRACE_OPEN => [ |
1404 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1405 | ], |
1406 | self::TYPE_BRACE_CLOSE => [ |
1407 | self::ACTION_POP => true, |
1408 | ], |
1409 | self::TYPE_PAREN_OPEN => [ |
1410 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1411 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1412 | ], |
1413 | ], |
1414 | // Like EXPRESSION_DOT, but in a property expression, see PROPERTY_EXPRESSION |
1415 | self::PROPERTY_EXPRESSION_DOT => [ |
1416 | self::TYPE_LITERAL => [ |
1417 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1418 | ], |
1419 | // The following are keywords behaving as literals |
1420 | self::TYPE_RETURN => [ |
1421 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1422 | ], |
1423 | self::TYPE_IF => [ |
1424 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1425 | ], |
1426 | self::TYPE_DO => [ |
1427 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1428 | ], |
1429 | self::TYPE_VAR => [ |
1430 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1431 | ], |
1432 | self::TYPE_FUNC => [ |
1433 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1434 | ], |
1435 | self::TYPE_CLASS => [ |
1436 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1437 | ], |
1438 | // We don't expect real unary/binary operators here, but some keywords |
1439 | // (new, delete, void, typeof, instanceof, in) are classified as such, and they can be |
1440 | // used as property names |
1441 | self::TYPE_UN_OP => [ |
1442 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1443 | ], |
1444 | self::TYPE_BIN_OP => [ |
1445 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1446 | ], |
1447 | ], |
1448 | // Like EXPRESSION_ARROWFUNC, but in a property expression, see PROPERTY_EXPRESSION |
1449 | self::PROPERTY_EXPRESSION_ARROWFUNC => [ |
1450 | self::TYPE_UN_OP => [ |
1451 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION, |
1452 | ], |
1453 | self::TYPE_INCR_OP => [ |
1454 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION, |
1455 | ], |
1456 | self::TYPE_ADD_OP => [ |
1457 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION, |
1458 | ], |
1459 | self::TYPE_BRACE_OPEN => [ |
1460 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1461 | self::ACTION_GOTO => self::STATEMENT, |
1462 | ], |
1463 | self::TYPE_PAREN_OPEN => [ |
1464 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1465 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1466 | ], |
1467 | self::TYPE_FUNC => [ |
1468 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1469 | self::ACTION_GOTO => self::FUNC, |
1470 | ], |
1471 | self::TYPE_CLASS => [ |
1472 | self::ACTION_PUSH => self::PROPERTY_EXPRESSION_OP, |
1473 | self::ACTION_GOTO => self::CLASS_DEF, |
1474 | ], |
1475 | self::TYPE_LITERAL => [ |
1476 | self::ACTION_GOTO => self::PROPERTY_EXPRESSION_OP, |
1477 | ], |
1478 | ], |
1479 | // Class definition (after the class keyword). Expects an identifier, or the extends |
1480 | // keyword followed by an expression (or both), followed by {, which starts an object |
1481 | // literal. The object literal's closing } will pop the stack, so the state to return |
1482 | // to after the class definition should be pushed to the stack first. |
1483 | self::CLASS_DEF => [ |
1484 | self::TYPE_BRACE_OPEN => [ |
1485 | self::ACTION_GOTO => self::PROPERTY_ASSIGNMENT, |
1486 | ], |
1487 | self::TYPE_PAREN_OPEN => [ |
1488 | self::ACTION_PUSH => self::CLASS_DEF, |
1489 | self::ACTION_GOTO => self::PAREN_EXPRESSION, |
1490 | ], |
1491 | self::TYPE_FUNC => [ |
1492 | self::ACTION_PUSH => self::CLASS_DEF, |
1493 | self::ACTION_GOTO => self::FUNC, |
1494 | ], |
1495 | ], |
1496 | // Import or export declaration |
1497 | self::IMPORT_EXPORT => [ |
1498 | self::TYPE_SEMICOLON => [ |
1499 | self::ACTION_GOTO => self::STATEMENT, |
1500 | ], |
1501 | self::TYPE_VAR => [ |
1502 | self::ACTION_GOTO => self::EXPRESSION, |
1503 | ], |
1504 | self::TYPE_FUNC => [ |
1505 | self::ACTION_PUSH => self::EXPRESSION_OP, |
1506 | self::ACTION_GOTO => self::FUNC, |
1507 | ], |
1508 | self::TYPE_CLASS => [ |
1509 | self::ACTION_PUSH => self::EXPRESSION_OP, |
1510 | self::ACTION_GOTO => self::CLASS_DEF, |
1511 | ], |
1512 | self::TYPE_SPECIAL => [ |
1513 | 'default' => [ |
1514 | self::ACTION_GOTO => self::EXPRESSION, |
1515 | ], |
1516 | // Stay in this state for *, as, from |
1517 | '*' => [], |
1518 | 'as' => [], |
1519 | 'from' => [], |
1520 | ], |
1521 | ], |
1522 | // Used in template string-specific code below |
1523 | self::TEMPLATE_STRING_HEAD => [ |
1524 | self::TYPE_LITERAL => [ |
1525 | self::ACTION_PUSH => self::TEMPLATE_STRING_TAIL, |
1526 | self::ACTION_GOTO => self::EXPRESSION, |
1527 | ], |
1528 | ], |
1529 | ]; |
1530 | |
1531 | /** |
1532 | * @var array $semicolon |
1533 | * |
1534 | * Rules for when semicolon insertion is appropriate. Semicolon insertion happens if we are |
1535 | * in one of these states, and encounter one of these tokens preceded by a newline. |
1536 | * |
1537 | * This array is augmented by ensureExpandedStates(). |
1538 | */ |
1539 | private static $semicolon = [ |
1540 | self::EXPRESSION_NO_NL => [ |
1541 | self::TYPE_UN_OP => true, |
1542 | // BIN_OP seems impossible at the start of an expression, but it can happen in |
1543 | // yield *foo |
1544 | self::TYPE_BIN_OP => true, |
1545 | self::TYPE_INCR_OP => true, |
1546 | self::TYPE_ADD_OP => true, |
1547 | self::TYPE_BRACE_OPEN => true, |
1548 | self::TYPE_PAREN_OPEN => true, |
1549 | self::TYPE_RETURN => true, |
1550 | self::TYPE_IF => true, |
1551 | self::TYPE_DO => true, |
1552 | self::TYPE_VAR => true, |
1553 | self::TYPE_FUNC => true, |
1554 | self::TYPE_CLASS => true, |
1555 | self::TYPE_LITERAL => true, |
1556 | self::TYPE_ASYNC => true, |
1557 | ], |
1558 | self::EXPRESSION_TERNARY_NO_NL => [ |
1559 | self::TYPE_UN_OP => true, |
1560 | // BIN_OP seems impossible at the start of an expression, but it can happen in |
1561 | // yield *foo |
1562 | self::TYPE_BIN_OP => true, |
1563 | self::TYPE_INCR_OP => true, |
1564 | self::TYPE_ADD_OP => true, |
1565 | self::TYPE_BRACE_OPEN => true, |
1566 | self::TYPE_PAREN_OPEN => true, |
1567 | self::TYPE_RETURN => true, |
1568 | self::TYPE_IF => true, |
1569 | self::TYPE_DO => true, |
1570 | self::TYPE_VAR => true, |
1571 | self::TYPE_FUNC => true, |
1572 | self::TYPE_CLASS => true, |
1573 | self::TYPE_LITERAL => true, |
1574 | self::TYPE_ASYNC => true, |
1575 | ], |
1576 | self::PAREN_EXPRESSION_NO_NL => [ |
1577 | self::TYPE_UN_OP => true, |
1578 | // BIN_OP seems impossible at the start of an expression, but it can happen in |
1579 | // yield *foo |
1580 | self::TYPE_BIN_OP => true, |
1581 | self::TYPE_INCR_OP => true, |
1582 | self::TYPE_ADD_OP => true, |
1583 | self::TYPE_BRACE_OPEN => true, |
1584 | self::TYPE_PAREN_OPEN => true, |
1585 | self::TYPE_RETURN => true, |
1586 | self::TYPE_IF => true, |
1587 | self::TYPE_DO => true, |
1588 | self::TYPE_VAR => true, |
1589 | self::TYPE_FUNC => true, |
1590 | self::TYPE_CLASS => true, |
1591 | self::TYPE_LITERAL => true, |
1592 | self::TYPE_ASYNC => true, |
1593 | ], |
1594 | self::PROPERTY_EXPRESSION_NO_NL => [ |
1595 | self::TYPE_UN_OP => true, |
1596 | // BIN_OP seems impossible at the start of an expression, but it can happen in |
1597 | // yield *foo |
1598 | self::TYPE_BIN_OP => true, |
1599 | self::TYPE_INCR_OP => true, |
1600 | self::TYPE_ADD_OP => true, |
1601 | self::TYPE_BRACE_OPEN => true, |
1602 | self::TYPE_PAREN_OPEN => true, |
1603 | self::TYPE_RETURN => true, |
1604 | self::TYPE_IF => true, |
1605 | self::TYPE_DO => true, |
1606 | self::TYPE_VAR => true, |
1607 | self::TYPE_FUNC => true, |
1608 | self::TYPE_CLASS => true, |
1609 | self::TYPE_LITERAL => true, |
1610 | self::TYPE_ASYNC => true, |
1611 | ], |
1612 | self::EXPRESSION_OP => [ |
1613 | self::TYPE_UN_OP => true, |
1614 | self::TYPE_INCR_OP => true, |
1615 | self::TYPE_BRACE_OPEN => true, |
1616 | self::TYPE_RETURN => true, |
1617 | self::TYPE_IF => true, |
1618 | self::TYPE_DO => true, |
1619 | self::TYPE_VAR => true, |
1620 | self::TYPE_FUNC => true, |
1621 | self::TYPE_CLASS => true, |
1622 | self::TYPE_LITERAL => true, |
1623 | self::TYPE_ASYNC => true, |
1624 | ], |
1625 | self::EXPRESSION_END => [ |
1626 | self::TYPE_UN_OP => true, |
1627 | self::TYPE_INCR_OP => true, |
1628 | self::TYPE_ADD_OP => true, |
1629 | self::TYPE_BRACE_OPEN => true, |
1630 | self::TYPE_PAREN_OPEN => true, |
1631 | self::TYPE_RETURN => true, |
1632 | self::TYPE_IF => true, |
1633 | self::TYPE_DO => true, |
1634 | self::TYPE_VAR => true, |
1635 | self::TYPE_FUNC => true, |
1636 | self::TYPE_CLASS => true, |
1637 | self::TYPE_LITERAL => true, |
1638 | self::TYPE_ASYNC => true, |
1639 | ], |
1640 | self::PAREN_EXPRESSION_OP_NO_NL => [ |
1641 | self::TYPE_FUNC => true, |
1642 | ] |
1643 | ]; |
1644 | |
1645 | /** |
1646 | * @var array $divStates |
1647 | * |
1648 | * States in which a / is a division operator. In all other states, it's the start of a regex. |
1649 | * |
1650 | * This array is augmented by self::ensureExpandedStates(). |
1651 | */ |
1652 | private static $divStates = [ |
1653 | self::EXPRESSION_OP => true, |
1654 | self::EXPRESSION_TERNARY_OP => true, |
1655 | self::PAREN_EXPRESSION_OP => true, |
1656 | self::PROPERTY_EXPRESSION_OP => true |
1657 | ]; |
1658 | |
1659 | /** |
1660 | * Add copies of all states but with negative numbers to self::$model (if not already present), |
1661 | * to represent generator function states. |
1662 | */ |
1663 | private static function ensureExpandedStates() { |
1664 | // Already done? |
1665 | if ( self::$expandedStates ) { |
1666 | return; |
1667 | } |
1668 | self::$expandedStates = true; |
1669 | |
1670 | // Add copies of all states (except FUNC and GENFUNC) with negative numbers. |
1671 | // These negative states represent states inside generator functions. When in these states, |
1672 | // TYPE_YIELD is treated as TYPE_RETURN, otherwise as TYPE_LITERAL |
1673 | foreach ( self::$model as $state => $transitions ) { |
1674 | if ( $state === self::FUNC || $state === self::GENFUNC ) { |
1675 | continue; |
1676 | } |
1677 | foreach ( $transitions as $tokenType => $actions ) { |
1678 | foreach ( $actions as $action => $target ) { |
1679 | if ( !is_array( $target ) ) { |
1680 | self::$model[-$state][$tokenType][$action] = ( |
1681 | $target === self::FUNC || |
1682 | $target === true || |
1683 | $target === self::GENFUNC |
1684 | ) ? $target : -$target; |
1685 | continue; |
1686 | } |
1687 | |
1688 | foreach ( $target as $subaction => $subtarget ) { |
1689 | self::$model[-$state][$tokenType][$action][$subaction] = ( |
1690 | $subtarget === self::FUNC || |
1691 | $subtarget === true || |
1692 | $subtarget === self::GENFUNC |
1693 | ) ? $subtarget : -$subtarget; |
1694 | } |
1695 | } |
1696 | } |
1697 | } |
1698 | // Special cases: |
1699 | // '{' in a property assignment starts a method, so it shouldn't be flipped |
1700 | self::$model[-self::PROPERTY_ASSIGNMENT][self::TYPE_BRACE_OPEN][self::ACTION_GOTO] = self::STATEMENT; |
1701 | |
1702 | // Also add negative versions of states to the other arrays |
1703 | foreach ( self::$semicolon as $state => $value ) { |
1704 | self::$semicolon[-$state] = $value; |
1705 | } |
1706 | foreach ( self::$divStates as $state => $value ) { |
1707 | self::$divStates[-$state] = $value; |
1708 | } |
1709 | } |
1710 | |
1711 | /** |
1712 | * Returns minified JavaScript code. |
1713 | * |
1714 | * @see MinifierState::setErrorHandler |
1715 | * @param string $s JavaScript code to minify |
1716 | * @param callable|null $onError Called with a ParseError object |
1717 | * @return string Minified code |
1718 | */ |
1719 | public static function minify( $s, $onError = null ) { |
1720 | return self::minifyInternal( $s, null, $onError ); |
1721 | } |
1722 | |
1723 | /** |
1724 | * Create a minifier state object without source map capabilities |
1725 | * |
1726 | * Example: |
1727 | * |
1728 | * JavaScriptMinifier::createMinifier() |
1729 | * ->addSourceFile( 'file.js', $source ) |
1730 | * ->getMinifiedOutput(); |
1731 | * |
1732 | * @return JavaScriptMinifierState |
1733 | */ |
1734 | public static function createMinifier() { |
1735 | return new JavaScriptMinifierState; |
1736 | } |
1737 | |
1738 | /** |
1739 | * Create a minifier state object with source map capabilities |
1740 | * |
1741 | * Example: |
1742 | * |
1743 | * $mapper = JavaScriptMinifier::createSourceMapState() |
1744 | * ->addSourceFile( 'file1.js', $source1 ) |
1745 | * ->addOutput( "\n\n" ) |
1746 | * ->addSourceFile( 'file2.js', $source2 ); |
1747 | * $out = $mapper->getMinifiedOutput(); |
1748 | * $map = $mapper->getSourceMap() |
1749 | * |
1750 | * @return JavaScriptMapperState |
1751 | */ |
1752 | public static function createSourceMapState() { |
1753 | return new JavaScriptMapperState; |
1754 | } |
1755 | |
1756 | /** |
1757 | * Create a MinifierState that doesn't actually minify |
1758 | * |
1759 | * @return IdentityMinifierState |
1760 | */ |
1761 | public static function createIdentityMinifier() { |
1762 | return new IdentityMinifierState; |
1763 | } |
1764 | |
1765 | /** |
1766 | * Minify with optional source map. |
1767 | * |
1768 | * @internal |
1769 | * |
1770 | * @param string $s |
1771 | * @param MappingsGenerator|null $mapGenerator |
1772 | * @param callable|null $onError |
1773 | * @return string |
1774 | */ |
1775 | public static function minifyInternal( $s, $mapGenerator = null, $onError = null ) { |
1776 | self::ensureExpandedStates(); |
1777 | |
1778 | // Here's where the minifying takes place: Loop through the input, looking for tokens |
1779 | // and output them to $out, taking actions to the above defined rules when appropriate. |
1780 | $error = null; |
1781 | $out = ''; |
1782 | $pos = 0; |
1783 | $length = strlen( $s ); |
1784 | $lineLength = 0; |
1785 | $dotlessNum = false; |
1786 | $lastDotlessNum = false; |
1787 | $newlineFound = true; |
1788 | $state = self::STATEMENT; |
1789 | $stack = []; |
1790 | // Optimization: calling end( $stack ) repeatedly is expensive |
1791 | $topOfStack = null; |
1792 | // Pretend that we have seen a semicolon yet |
1793 | $last = ';'; |
1794 | while ( $pos < $length ) { |
1795 | // First, skip over any whitespace and multiline comments, recording whether we |
1796 | // found any newline character |
1797 | $skip = strspn( $s, " \t\n\r\xb\xc", $pos ); |
1798 | if ( !$skip ) { |
1799 | $ch = $s[$pos]; |
1800 | if ( $ch === '/' && substr( $s, $pos, 2 ) === '/*' ) { |
1801 | // Multiline comment. Search for the end token or EOT. |
1802 | $end = strpos( $s, '*/', $pos + 2 ); |
1803 | $skip = $end === false ? $length - $pos : $end - $pos + 2; |
1804 | } |
1805 | } |
1806 | if ( $skip ) { |
1807 | // The semicolon insertion mechanism needs to know whether there was a newline |
1808 | // between two tokens, so record it now. |
1809 | if ( !$newlineFound && strcspn( $s, "\r\n", $pos, $skip ) !== $skip ) { |
1810 | $newlineFound = true; |
1811 | } |
1812 | if ( $mapGenerator ) { |
1813 | $mapGenerator->consumeSource( $skip ); |
1814 | } |
1815 | $pos += $skip; |
1816 | continue; |
1817 | } |
1818 | // Handle C++-style comments and html comments, which are treated as single line |
1819 | // comments by the browser, regardless of whether the end tag is on the same line. |
1820 | // Handle --> the same way, but only if it's at the beginning of the line |
1821 | // @phan-suppress-next-line PhanPossiblyUndeclaredVariable |
1822 | if ( ( $ch === '/' && substr( $s, $pos, 2 ) === '//' ) |
1823 | || ( $ch === '<' && substr( $s, $pos, 4 ) === '<!--' ) |
1824 | || ( $ch === '-' && $newlineFound && substr( $s, $pos, 3 ) === '-->' ) |
1825 | ) { |
1826 | $skip = strcspn( $s, "\r\n", $pos ); |
1827 | if ( $mapGenerator ) { |
1828 | $mapGenerator->consumeSource( $skip ); |
1829 | } |
1830 | $pos += $skip; |
1831 | continue; |
1832 | } |
1833 | |
1834 | // Find out which kind of token we're handling. |
1835 | // Note: $end must point past the end of the current token |
1836 | // so that `substr($s, $pos, $end - $pos)` would be the entire token. |
1837 | // In order words, $end will be the offset of the last relevant character |
1838 | // in the stream + 1, or simply put: The offset of the first character |
1839 | // of any next token in the stream. |
1840 | $end = $pos + 1; |
1841 | // Handle string literals |
1842 | if ( $ch === "'" || $ch === '"' ) { |
1843 | // Search to the end of the string literal, skipping over backslash escapes |
1844 | $search = $ch . '\\'; |
1845 | do { |
1846 | // Speculatively add 2 to the end so that if we see a backslash, |
1847 | // the next iteration will start 2 characters further (one for the |
1848 | // backslash, one for the escaped character). |
1849 | // We'll correct this outside the loop. |
1850 | $end += strcspn( $s, $search, $end ) + 2; |
1851 | // If the last character in our search for a quote or a backlash |
1852 | // matched a backslash and we haven't reached the end, keep searching.. |
1853 | } while ( $end - 2 < $length && $s[$end - 2] === '\\' ); |
1854 | // Correction (1): Undo speculative add, keep only one (end of string literal) |
1855 | $end--; |
1856 | if ( $end > $length ) { |
1857 | // Correction (2): Loop wrongly assumed an end quote ended the search, |
1858 | // but search ended because we've reached the end. Correct $end. |
1859 | // TODO: This is invalid and should throw. |
1860 | $end--; |
1861 | } |
1862 | |
1863 | // Handle template strings, either from "`" to begin a new string, |
1864 | // or continuation after the "}" that ends a "${"-expression. |
1865 | } elseif ( $ch === '`' || ( $ch === '}' && $topOfStack === self::TEMPLATE_STRING_TAIL ) ) { |
1866 | if ( $ch === '}' ) { |
1867 | // Pop the TEMPLATE_STRING_TAIL state off the stack |
1868 | // We don't let it get popped off the stack the normal way, to avoid the newline |
1869 | // and comment stripping code above running on the continuation of the literal |
1870 | array_pop( $stack ); |
1871 | // Also pop the previous state off the stack |
1872 | $state = array_pop( $stack ); |
1873 | $topOfStack = end( $stack ); |
1874 | } |
1875 | // Search until we reach either a closing ` or a ${, skipping over backslash escapes |
1876 | // and $ characters followed by something other than { or ` |
1877 | do { |
1878 | $end += strcspn( $s, '`$\\', $end ) + 1; |
1879 | if ( $end - 1 < $length && $s[$end - 1] === '`' ) { |
1880 | // End of the string, stop |
1881 | // We don't do this in the while() condition because the $end++ in the |
1882 | // backslash escape branch makes it difficult to do so without incorrectly |
1883 | // considering an escaped backtick (\`) the end of the string |
1884 | break; |
1885 | } |
1886 | if ( $end - 1 < $length && $s[$end - 1] === '\\' ) { |
1887 | // Backslash escape. Skip the next character, and keep going |
1888 | $end++; |
1889 | continue; |
1890 | } |
1891 | if ( $end < $length && $s[$end - 1] === '$' && $s[$end] === '{' ) { |
1892 | // Beginning of an expression in ${ ... }. Skip the {, and stop |
1893 | $end++; |
1894 | // Push the current state to the stack. We'll pop this off later when hitting |
1895 | // the end of this template string |
1896 | $stack[] = $state; |
1897 | $topOfStack = $state; |
1898 | // Change the state to TEMPLATE_STRING_HEAD. The token type will be detected |
1899 | // as TYPE_LITERAL, and this will cause the state machine to expect an |
1900 | // expression, then go to the TEMPLATE_STRING_TAIL state when it hits the } |
1901 | $state = self::TEMPLATE_STRING_HEAD; |
1902 | break; |
1903 | } |
1904 | } while ( $end - 1 < $length ); |
1905 | if ( $end > $length ) { |
1906 | // Loop wrongly assumed an end quote or ${ ended the search, |
1907 | // but search ended because we've reached the end. Correct $end. |
1908 | // TODO: This is invalid and should throw. |
1909 | $end--; |
1910 | } |
1911 | |
1912 | // We have to distinguish between regexp literals and division operators |
1913 | // A division operator is only possible in certain states |
1914 | } elseif ( $ch === '/' && !isset( self::$divStates[$state] ) ) { |
1915 | // Regexp literal |
1916 | for ( ; ; ) { |
1917 | // Search until we find "/" (end of regexp), "\" (backslash escapes), |
1918 | // or "[" (start of character classes). |
1919 | do { |
1920 | // Speculatively add 2 to ensure next iteration skips |
1921 | // over backslash and escaped character. |
1922 | // We'll correct this outside the loop. |
1923 | $end += strcspn( $s, '/[\\', $end ) + 2; |
1924 | // If backslash escape, keep searching... |
1925 | } while ( $end - 2 < $length && $s[$end - 2] === '\\' ); |
1926 | // Correction (1): Undo speculative add, keep only one (end of regexp) |
1927 | $end--; |
1928 | if ( $end > $length ) { |
1929 | // Correction (2): Loop wrongly assumed end slash was seen |
1930 | // String ended without end of regexp. Correct $end. |
1931 | // TODO: This is invalid and should throw. |
1932 | $end--; |
1933 | break; |
1934 | } |
1935 | if ( $s[$end - 1] === '/' ) { |
1936 | break; |
1937 | } |
1938 | // (Implicit else), we must've found the start of a char class, |
1939 | // skip until we find "]" (end of char class), or "\" (backslash escape) |
1940 | do { |
1941 | // Speculatively add 2 for backslash escape. |
1942 | // We'll substract one outside the loop. |
1943 | $end += strcspn( $s, ']\\', $end ) + 2; |
1944 | // If backslash escape, keep searching... |
1945 | } while ( $end - 2 < $length && $s[$end - 2] === '\\' ); |
1946 | // Correction (1): Undo speculative add, keep only one (end of regexp) |
1947 | $end--; |
1948 | if ( $end > $length ) { |
1949 | // Correction (2): Loop wrongly assumed "]" was seen |
1950 | // String ended without ending char class or regexp. Correct $end. |
1951 | // TODO: This is invalid and should throw. |
1952 | $end--; |
1953 | break; |
1954 | } |
1955 | } |
1956 | // Search past the regexp modifiers (gi) |
1957 | while ( $end < $length && ctype_alpha( $s[$end] ) ) { |
1958 | $end++; |
1959 | } |
1960 | } elseif ( |
1961 | $ch === '0' |
1962 | && ( $pos + 1 < $length ) && ( $s[$pos + 1] === 'x' || $s[$pos + 1] === 'X' ) |
1963 | ) { |
1964 | // Hex numeric literal |
1965 | // x or X |
1966 | $end++; |
1967 | $len = strspn( $s, '0123456789ABCDEFabcdef', $end ); |
1968 | if ( !$len && !$error ) { |
1969 | $error = new ParseError( |
1970 | 'Expected a hexadecimal number but found ' . substr( $s, $pos, 5 ), |
1971 | $pos, |
1972 | ); |
1973 | } |
1974 | $end += $len; |
1975 | } elseif ( |
1976 | // Optimisation: This check must accept only ASCII digits 0-9. |
1977 | // Avoid ctype_digit() because it is slower and also accepts locale-specific digits. |
1978 | // Using is_numeric() might seem wrong also as it accepts negative numbers, decimal |
1979 | // numbers, and exponents (e.g. strings like "+012.34e6"). But, it is fine here |
1980 | // because we know $ch is a single character, and we believe the only single |
1981 | // characters that is_numeric() accepts are ASCII digits 0-9. |
1982 | is_numeric( $ch ) |
1983 | || ( $ch === '.' && $pos + 1 < $length && is_numeric( $s[$pos + 1] ) ) |
1984 | ) { |
1985 | $end += strspn( $s, '0123456789', $end ); |
1986 | $decimal = strspn( $s, '.', $end ); |
1987 | if ( $decimal ) { |
1988 | if ( $decimal > 2 && !$error ) { |
1989 | $error = new ParseError( 'Too many decimal points', $end ); |
1990 | } |
1991 | $end += strspn( $s, '0123456789', $end + 1 ) + $decimal; |
1992 | } else { |
1993 | $dotlessNum = true; |
1994 | } |
1995 | $exponent = strspn( $s, 'eE', $end ); |
1996 | if ( $exponent ) { |
1997 | if ( $exponent > 1 && !$error ) { |
1998 | $error = new ParseError( 'Number with several E', $end ); |
1999 | } |
2000 | $end += $exponent; |
2001 | |
2002 | // + sign is optional; - sign is required. |
2003 | $end += strspn( $s, '-+', $end ); |
2004 | $len = strspn( $s, '0123456789', $end ); |
2005 | if ( !$len && !$error ) { |
2006 | $error = new ParseError( |
2007 | 'Missing decimal digits after exponent', |
2008 | $pos |
2009 | ); |
2010 | } |
2011 | $end += $len; |
2012 | } |
2013 | } elseif ( isset( self::$opChars[$ch] ) ) { |
2014 | // Punctuation character. Search for the longest matching operator. |
2015 | for ( $tokenLength = self::LONGEST_PUNCTUATION_TOKEN; $tokenLength > 1; $tokenLength-- ) { |
2016 | if ( |
2017 | $pos + $tokenLength <= $length && |
2018 | isset( self::$tokenTypes[ substr( $s, $pos, $tokenLength ) ] ) |
2019 | ) { |
2020 | $end = $pos + $tokenLength; |
2021 | break; |
2022 | } |
2023 | } |
2024 | } else { |
2025 | // Identifier or reserved word. Search for the end by excluding whitespace and |
2026 | // punctuation. |
2027 | $end += strcspn( $s, " \t\n.;,=<>+-{}()[]?:*/%'\"`!&|^~\xb\xc\r", $end ); |
2028 | } |
2029 | |
2030 | // Now get the token type from our type array |
2031 | // so $end - $pos == strlen( $token ) |
2032 | $token = substr( $s, $pos, $end - $pos ); |
2033 | $type = isset( self::$model[$state][self::TYPE_SPECIAL][$token] ) |
2034 | ? self::TYPE_SPECIAL |
2035 | : self::$tokenTypes[$token] ?? self::TYPE_LITERAL; |
2036 | if ( $type === self::TYPE_YIELD ) { |
2037 | // yield is treated as TYPE_RETURN inside a generator function (negative state) |
2038 | // but as TYPE_LITERAL when not in a generator function (positive state) |
2039 | $type = $state < 0 ? self::TYPE_RETURN : self::TYPE_LITERAL; |
2040 | } |
2041 | |
2042 | $pad = ''; |
2043 | if ( $newlineFound && isset( self::$semicolon[$state][$type] ) ) { |
2044 | // This token triggers the semicolon insertion mechanism of javascript. While we |
2045 | // could add the ; token here ourselves, keeping the newline has a few advantages. |
2046 | $pad = "\n"; |
2047 | $state = $state < 0 ? -self::STATEMENT : self::STATEMENT; |
2048 | $lineLength = 0; |
2049 | } elseif ( $lineLength + $end - $pos > self::$maxLineLength && |
2050 | !isset( self::$semicolon[$state][$type] ) && |
2051 | $type !== self::TYPE_INCR_OP && |
2052 | $type !== self::TYPE_ARROW |
2053 | ) { |
2054 | // This line would get too long if we added $token, so add a newline first. |
2055 | // Only do this if it won't trigger semicolon insertion and if it won't |
2056 | // put a postfix increment operator or an arrow on its own line, |
2057 | // which is illegal in js. |
2058 | $pad = "\n"; |
2059 | $lineLength = 0; |
2060 | // Check, whether we have to separate the token from the last one with whitespace |
2061 | } elseif ( !isset( self::$opChars[$last] ) && !isset( self::$opChars[$ch] ) ) { |
2062 | $pad = ' '; |
2063 | $lineLength++; |
2064 | // Don't accidentally create ++, -- or // tokens |
2065 | } elseif ( $last === $ch && ( $ch === '+' || $ch === '-' || $ch === '/' ) ) { |
2066 | $pad = ' '; |
2067 | $lineLength++; |
2068 | // Don't create invalid dot notation after number literal (T303827). |
2069 | // Keep whitespace in "42. foo". |
2070 | // But keep minifying "foo.bar", "42..foo", and "42.0.foo" per $opChars. |
2071 | } elseif ( $lastDotlessNum && $type === self::TYPE_DOT ) { |
2072 | $pad = ' '; |
2073 | $lineLength++; |
2074 | } |
2075 | |
2076 | // self::debug( $topOfStack, $last, $state, $ch, $token, $type ); |
2077 | |
2078 | if ( $mapGenerator ) { |
2079 | $mapGenerator->outputSpace( $pad ); |
2080 | $mapGenerator->outputToken( $token ); |
2081 | $mapGenerator->consumeSource( $end - $pos ); |
2082 | } |
2083 | $out .= $pad; |
2084 | $out .= $token; |
2085 | $lineLength += $end - $pos; |
2086 | $last = $s[$end - 1]; |
2087 | $pos = $end; |
2088 | $newlineFound = false; |
2089 | $lastDotlessNum = $dotlessNum; |
2090 | $dotlessNum = false; |
2091 | |
2092 | // Now that we have output our token, transition into the new state. |
2093 | $actions = $type === self::TYPE_SPECIAL ? |
2094 | self::$model[$state][$type][$token] : |
2095 | self::$model[$state][$type] ?? []; |
2096 | if ( isset( $actions[self::ACTION_PUSH] ) && |
2097 | count( $stack ) < self::STACK_LIMIT |
2098 | ) { |
2099 | $topOfStack = $actions[self::ACTION_PUSH]; |
2100 | $stack[] = $topOfStack; |
2101 | } |
2102 | if ( $stack && isset( $actions[self::ACTION_POP] ) ) { |
2103 | $state = array_pop( $stack ); |
2104 | $topOfStack = end( $stack ); |
2105 | } elseif ( isset( $actions[self::ACTION_GOTO] ) ) { |
2106 | $state = $actions[self::ACTION_GOTO]; |
2107 | } |
2108 | } |
2109 | if ( $onError && $error ) { |
2110 | $onError( $error ); |
2111 | } |
2112 | return $out; |
2113 | } |
2114 | |
2115 | /** |
2116 | * @param null|false|int $top |
2117 | * @param string $last |
2118 | * @param int $state |
2119 | * @param string $ch |
2120 | * @param string $token |
2121 | * @param int $type |
2122 | */ |
2123 | private static function debug( |
2124 | $top, string $last, |
2125 | int $state, string $ch, string $token, int $type |
2126 | ) { |
2127 | static $first = true; |
2128 | $self = new ReflectionClass( self::class ); |
2129 | |
2130 | foreach ( $self->getConstants() as $name => $value ) { |
2131 | if ( $value === $top ) { |
2132 | $top = $name; |
2133 | } |
2134 | if ( $value === $state ) { |
2135 | $state = $name; |
2136 | } |
2137 | if ( $value === $type ) { |
2138 | $type = $name; |
2139 | } |
2140 | } |
2141 | |
2142 | if ( $first ) { |
2143 | print sprintf( "| %-29s | %-4s | %-29s | %-2s | %-10s | %-29s\n", |
2144 | 'topOfStack', 'last', 'state', 'ch', 'token', 'type' ); |
2145 | print sprintf( "| %'-29s | %'-4s | %'-29s | %'-2s | %'-10s | %'-29s\n", |
2146 | '', '', '', '', '', '' ); |
2147 | $first = false; |
2148 | } |
2149 | print sprintf( "| %-29s | %-4s | %-29s | %-2s | %-10s | %-29s\n", |
2150 | (string)$top, $last, $state, $ch, $token, $type ); |
2151 | } |
2152 | } |