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 | "use strict";
|
45 |
|
46 | function DEFNODE(type, props, methods, base) {
|
47 | if (typeof base === "undefined") base = AST_Node;
|
48 | props = props ? props.split(/\s+/) : [];
|
49 | var self_props = props;
|
50 | if (base && base.PROPS) props = props.concat(base.PROPS);
|
51 | var code = [
|
52 | "return function AST_", type, "(props){",
|
53 | "if(props){",
|
54 | ];
|
55 | props.forEach(function(prop) {
|
56 | code.push("this.", prop, "=props.", prop, ";");
|
57 | });
|
58 | code.push("}");
|
59 | var proto = Object.create(base && base.prototype);
|
60 | if (methods.initialize || proto.initialize) code.push("this.initialize();");
|
61 | code.push("};");
|
62 | var ctor = new Function(code.join(""))();
|
63 | ctor.prototype = proto;
|
64 | ctor.prototype.CTOR = ctor;
|
65 | ctor.prototype.TYPE = ctor.TYPE = type;
|
66 | if (base) {
|
67 | ctor.BASE = base;
|
68 | base.SUBCLASSES.push(ctor);
|
69 | }
|
70 | ctor.DEFMETHOD = function(name, method) {
|
71 | this.prototype[name] = method;
|
72 | };
|
73 | ctor.PROPS = props;
|
74 | ctor.SELF_PROPS = self_props;
|
75 | ctor.SUBCLASSES = [];
|
76 | for (var name in methods) if (HOP(methods, name)) {
|
77 | if (/^\$/.test(name)) {
|
78 | ctor[name.substr(1)] = methods[name];
|
79 | } else {
|
80 | ctor.DEFMETHOD(name, methods[name]);
|
81 | }
|
82 | }
|
83 | if (typeof exports !== "undefined") exports["AST_" + type] = ctor;
|
84 | return ctor;
|
85 | }
|
86 |
|
87 | var AST_Token = DEFNODE("Token", "type value line col pos endline endcol endpos nlb comments_before comments_after file raw", {
|
88 | }, null);
|
89 |
|
90 | var AST_Node = DEFNODE("Node", "start end", {
|
91 | _clone: function(deep) {
|
92 | if (deep) {
|
93 | var self = this.clone();
|
94 | return self.transform(new TreeTransformer(function(node) {
|
95 | if (node !== self) {
|
96 | return node.clone(true);
|
97 | }
|
98 | }));
|
99 | }
|
100 | return new this.CTOR(this);
|
101 | },
|
102 | clone: function(deep) {
|
103 | return this._clone(deep);
|
104 | },
|
105 | $documentation: "Base class of all AST nodes",
|
106 | $propdoc: {
|
107 | start: "[AST_Token] The first token of this node",
|
108 | end: "[AST_Token] The last token of this node"
|
109 | },
|
110 | walk: function(visitor) {
|
111 | visitor.visit(this);
|
112 | },
|
113 | _validate: function() {
|
114 | if (this.TYPE == "Node") throw new Error("should not instantiate AST_Node");
|
115 | },
|
116 | validate: function() {
|
117 | var ctor = this.CTOR;
|
118 | do {
|
119 | ctor.prototype._validate.call(this);
|
120 | } while (ctor = ctor.BASE);
|
121 | },
|
122 | validate_ast: function() {
|
123 | var marker = {};
|
124 | this.walk(new TreeWalker(function(node) {
|
125 | if (node.validate_visited === marker) {
|
126 | throw new Error(string_template("cannot reuse {type} from [{file}:{line},{col}]", {
|
127 | type: "AST_" + node.TYPE,
|
128 | file: node.start.file,
|
129 | line: node.start.line,
|
130 | col: node.start.col,
|
131 | }));
|
132 | }
|
133 | node.validate_visited = marker;
|
134 | }));
|
135 | },
|
136 | }, null);
|
137 |
|
138 | (AST_Node.log_function = function(fn, verbose) {
|
139 | if (typeof fn != "function") {
|
140 | AST_Node.info = AST_Node.warn = noop;
|
141 | return;
|
142 | }
|
143 | var printed = Object.create(null);
|
144 | AST_Node.info = verbose ? function(text, props) {
|
145 | log("INFO: " + string_template(text, props));
|
146 | } : noop;
|
147 | AST_Node.warn = function(text, props) {
|
148 | log("WARN: " + string_template(text, props));
|
149 | };
|
150 |
|
151 | function log(msg) {
|
152 | if (printed[msg]) return;
|
153 | printed[msg] = true;
|
154 | fn(msg);
|
155 | }
|
156 | })();
|
157 |
|
158 | var restore_transforms = [];
|
159 | AST_Node.enable_validation = function() {
|
160 | AST_Node.disable_validation();
|
161 | (function validate_transform(ctor) {
|
162 | ctor.SUBCLASSES.forEach(validate_transform);
|
163 | if (!HOP(ctor.prototype, "transform")) return;
|
164 | var transform = ctor.prototype.transform;
|
165 | ctor.prototype.transform = function(tw, in_list) {
|
166 | var node = transform.call(this, tw, in_list);
|
167 | if (node instanceof AST_Node) {
|
168 | node.validate();
|
169 | } else if (!(node === null || in_list && List.is_op(node))) {
|
170 | throw new Error("invalid transformed value: " + node);
|
171 | }
|
172 | return node;
|
173 | };
|
174 | restore_transforms.push(function() {
|
175 | ctor.prototype.transform = transform;
|
176 | });
|
177 | })(this);
|
178 | };
|
179 |
|
180 | AST_Node.disable_validation = function() {
|
181 | var restore;
|
182 | while (restore = restore_transforms.pop()) restore();
|
183 | };
|
184 |
|
185 |
|
186 |
|
187 | var AST_Statement = DEFNODE("Statement", null, {
|
188 | $documentation: "Base class of all statements",
|
189 | _validate: function() {
|
190 | if (this.TYPE == "Statement") throw new Error("should not instantiate AST_Statement");
|
191 | },
|
192 | });
|
193 |
|
194 | var AST_Debugger = DEFNODE("Debugger", null, {
|
195 | $documentation: "Represents a debugger statement",
|
196 | }, AST_Statement);
|
197 |
|
198 | var AST_Directive = DEFNODE("Directive", "quote value", {
|
199 | $documentation: "Represents a directive, like \"use strict\";",
|
200 | $propdoc: {
|
201 | quote: "[string?] the original quote character",
|
202 | value: "[string] The value of this directive as a plain string (it's not an AST_String!)",
|
203 | },
|
204 | _validate: function() {
|
205 | if (this.quote != null) {
|
206 | if (typeof this.quote != "string") throw new Error("quote must be string");
|
207 | if (!/^["']$/.test(this.quote)) throw new Error("invalid quote: " + this.quote);
|
208 | }
|
209 | if (typeof this.value != "string") throw new Error("value must be string");
|
210 | },
|
211 | }, AST_Statement);
|
212 |
|
213 | var AST_EmptyStatement = DEFNODE("EmptyStatement", null, {
|
214 | $documentation: "The empty statement (empty block or simply a semicolon)"
|
215 | }, AST_Statement);
|
216 |
|
217 | function is_statement(node) {
|
218 | return node instanceof AST_Statement
|
219 | && !(node instanceof AST_ClassExpression)
|
220 | && !(node instanceof AST_LambdaExpression);
|
221 | }
|
222 |
|
223 | function validate_expression(value, prop, multiple, allow_spread, allow_hole) {
|
224 | multiple = multiple ? "contain" : "be";
|
225 | if (!(value instanceof AST_Node)) throw new Error(prop + " must " + multiple + " AST_Node");
|
226 | if (value instanceof AST_DefaultValue) throw new Error(prop + " cannot " + multiple + " AST_DefaultValue");
|
227 | if (value instanceof AST_Destructured) throw new Error(prop + " cannot " + multiple + " AST_Destructured");
|
228 | if (value instanceof AST_Hole && !allow_hole) throw new Error(prop + " cannot " + multiple + " AST_Hole");
|
229 | if (value instanceof AST_Spread && !allow_spread) throw new Error(prop + " cannot " + multiple + " AST_Spread");
|
230 | if (is_statement(value)) throw new Error(prop + " cannot " + multiple + " AST_Statement");
|
231 | if (value instanceof AST_SymbolDeclaration) {
|
232 | throw new Error(prop + " cannot " + multiple + " AST_SymbolDeclaration");
|
233 | }
|
234 | }
|
235 |
|
236 | function must_be_expression(node, prop) {
|
237 | validate_expression(node[prop], prop);
|
238 | }
|
239 |
|
240 | var AST_SimpleStatement = DEFNODE("SimpleStatement", "body", {
|
241 | $documentation: "A statement consisting of an expression, i.e. a = 1 + 2",
|
242 | $propdoc: {
|
243 | body: "[AST_Node] an expression node (should not be instanceof AST_Statement)",
|
244 | },
|
245 | walk: function(visitor) {
|
246 | var node = this;
|
247 | visitor.visit(node, function() {
|
248 | node.body.walk(visitor);
|
249 | });
|
250 | },
|
251 | _validate: function() {
|
252 | must_be_expression(this, "body");
|
253 | },
|
254 | }, AST_Statement);
|
255 |
|
256 | var AST_BlockScope = DEFNODE("BlockScope", "enclosed functions make_def parent_scope variables", {
|
257 | $documentation: "Base class for all statements introducing a lexical scope",
|
258 | $propdoc: {
|
259 | enclosed: "[SymbolDef*/S] a list of all symbol definitions that are accessed from this scope or any subscopes",
|
260 | functions: "[Dictionary/S] like `variables`, but only lists function declarations",
|
261 | parent_scope: "[AST_Scope?/S] link to the parent scope",
|
262 | variables: "[Dictionary/S] a map of name ---> SymbolDef for all variables/functions defined in this scope",
|
263 | },
|
264 | clone: function(deep) {
|
265 | var node = this._clone(deep);
|
266 | if (this.enclosed) node.enclosed = this.enclosed.slice();
|
267 | if (this.functions) node.functions = this.functions.clone();
|
268 | if (this.variables) node.variables = this.variables.clone();
|
269 | return node;
|
270 | },
|
271 | pinned: function() {
|
272 | return this.resolve().pinned();
|
273 | },
|
274 | resolve: function() {
|
275 | return this.parent_scope.resolve();
|
276 | },
|
277 | _validate: function() {
|
278 | if (this.TYPE == "BlockScope") throw new Error("should not instantiate AST_BlockScope");
|
279 | if (this.parent_scope == null) return;
|
280 | if (!(this.parent_scope instanceof AST_BlockScope)) throw new Error("parent_scope must be AST_BlockScope");
|
281 | if (!(this.resolve() instanceof AST_Scope)) throw new Error("must be contained within AST_Scope");
|
282 | },
|
283 | }, AST_Statement);
|
284 |
|
285 | function walk_body(node, visitor) {
|
286 | node.body.forEach(function(node) {
|
287 | node.walk(visitor);
|
288 | });
|
289 | }
|
290 |
|
291 | var AST_Block = DEFNODE("Block", "body", {
|
292 | $documentation: "A body of statements (usually braced)",
|
293 | $propdoc: {
|
294 | body: "[AST_Statement*] an array of statements"
|
295 | },
|
296 | walk: function(visitor) {
|
297 | var node = this;
|
298 | visitor.visit(node, function() {
|
299 | walk_body(node, visitor);
|
300 | });
|
301 | },
|
302 | _validate: function() {
|
303 | if (this.TYPE == "Block") throw new Error("should not instantiate AST_Block");
|
304 | this.body.forEach(function(node) {
|
305 | if (!is_statement(node)) throw new Error("body must contain AST_Statement");
|
306 | });
|
307 | },
|
308 | }, AST_BlockScope);
|
309 |
|
310 | var AST_BlockStatement = DEFNODE("BlockStatement", null, {
|
311 | $documentation: "A block statement",
|
312 | }, AST_Block);
|
313 |
|
314 | var AST_StatementWithBody = DEFNODE("StatementWithBody", "body", {
|
315 | $documentation: "Base class for all statements that contain one nested body: `For`, `ForIn`, `Do`, `While`, `With`",
|
316 | $propdoc: {
|
317 | body: "[AST_Statement] the body; this should always be present, even if it's an AST_EmptyStatement"
|
318 | },
|
319 | _validate: function() {
|
320 | if (this.TYPE == "StatementWithBody") throw new Error("should not instantiate AST_StatementWithBody");
|
321 | if (!is_statement(this.body)) throw new Error("body must be AST_Statement");
|
322 | },
|
323 | }, AST_BlockScope);
|
324 |
|
325 | var AST_LabeledStatement = DEFNODE("LabeledStatement", "label", {
|
326 | $documentation: "Statement with a label",
|
327 | $propdoc: {
|
328 | label: "[AST_Label] a label definition"
|
329 | },
|
330 | walk: function(visitor) {
|
331 | var node = this;
|
332 | visitor.visit(node, function() {
|
333 | node.label.walk(visitor);
|
334 | node.body.walk(visitor);
|
335 | });
|
336 | },
|
337 | clone: function(deep) {
|
338 | var node = this._clone(deep);
|
339 | if (deep) {
|
340 | var label = node.label;
|
341 | var def = this.label;
|
342 | node.walk(new TreeWalker(function(node) {
|
343 | if (node instanceof AST_LoopControl) {
|
344 | if (!node.label || node.label.thedef !== def) return;
|
345 | node.label.thedef = label;
|
346 | label.references.push(node);
|
347 | return true;
|
348 | }
|
349 | if (node instanceof AST_Scope) return true;
|
350 | }));
|
351 | }
|
352 | return node;
|
353 | },
|
354 | _validate: function() {
|
355 | if (!(this.label instanceof AST_Label)) throw new Error("label must be AST_Label");
|
356 | },
|
357 | }, AST_StatementWithBody);
|
358 |
|
359 | var AST_IterationStatement = DEFNODE("IterationStatement", null, {
|
360 | $documentation: "Internal class. All loops inherit from it.",
|
361 | _validate: function() {
|
362 | if (this.TYPE == "IterationStatement") throw new Error("should not instantiate AST_IterationStatement");
|
363 | },
|
364 | }, AST_StatementWithBody);
|
365 |
|
366 | var AST_DWLoop = DEFNODE("DWLoop", "condition", {
|
367 | $documentation: "Base class for do/while statements",
|
368 | $propdoc: {
|
369 | condition: "[AST_Node] the loop condition. Should not be instanceof AST_Statement"
|
370 | },
|
371 | _validate: function() {
|
372 | if (this.TYPE == "DWLoop") throw new Error("should not instantiate AST_DWLoop");
|
373 | must_be_expression(this, "condition");
|
374 | },
|
375 | }, AST_IterationStatement);
|
376 |
|
377 | var AST_Do = DEFNODE("Do", null, {
|
378 | $documentation: "A `do` statement",
|
379 | walk: function(visitor) {
|
380 | var node = this;
|
381 | visitor.visit(node, function() {
|
382 | node.body.walk(visitor);
|
383 | node.condition.walk(visitor);
|
384 | });
|
385 | }
|
386 | }, AST_DWLoop);
|
387 |
|
388 | var AST_While = DEFNODE("While", null, {
|
389 | $documentation: "A `while` statement",
|
390 | walk: function(visitor) {
|
391 | var node = this;
|
392 | visitor.visit(node, function() {
|
393 | node.condition.walk(visitor);
|
394 | node.body.walk(visitor);
|
395 | });
|
396 | }
|
397 | }, AST_DWLoop);
|
398 |
|
399 | var AST_For = DEFNODE("For", "init condition step", {
|
400 | $documentation: "A `for` statement",
|
401 | $propdoc: {
|
402 | init: "[AST_Node?] the `for` initialization code, or null if empty",
|
403 | condition: "[AST_Node?] the `for` termination clause, or null if empty",
|
404 | step: "[AST_Node?] the `for` update clause, or null if empty"
|
405 | },
|
406 | walk: function(visitor) {
|
407 | var node = this;
|
408 | visitor.visit(node, function() {
|
409 | if (node.init) node.init.walk(visitor);
|
410 | if (node.condition) node.condition.walk(visitor);
|
411 | if (node.step) node.step.walk(visitor);
|
412 | node.body.walk(visitor);
|
413 | });
|
414 | },
|
415 | _validate: function() {
|
416 | if (this.init != null) {
|
417 | if (!(this.init instanceof AST_Node)) throw new Error("init must be AST_Node");
|
418 | if (is_statement(this.init) && !(this.init instanceof AST_Definitions)) {
|
419 | throw new Error("init cannot be AST_Statement");
|
420 | }
|
421 | }
|
422 | if (this.condition != null) must_be_expression(this, "condition");
|
423 | if (this.step != null) must_be_expression(this, "step");
|
424 | },
|
425 | }, AST_IterationStatement);
|
426 |
|
427 | var AST_ForEnumeration = DEFNODE("ForEnumeration", "init object", {
|
428 | $documentation: "Base class for enumeration loops, i.e. `for ... in`, `for ... of` & `for await ... of`",
|
429 | $propdoc: {
|
430 | init: "[AST_Node] the assignment target during iteration",
|
431 | object: "[AST_Node] the object to iterate over"
|
432 | },
|
433 | walk: function(visitor) {
|
434 | var node = this;
|
435 | visitor.visit(node, function() {
|
436 | node.init.walk(visitor);
|
437 | node.object.walk(visitor);
|
438 | node.body.walk(visitor);
|
439 | });
|
440 | },
|
441 | _validate: function() {
|
442 | if (this.TYPE == "ForEnumeration") throw new Error("should not instantiate AST_ForEnumeration");
|
443 | if (this.init instanceof AST_Definitions) {
|
444 | if (this.init.definitions.length != 1) throw new Error("init must have single declaration");
|
445 | } else {
|
446 | validate_destructured(this.init, function(node) {
|
447 | if (!(node instanceof AST_PropAccess || node instanceof AST_SymbolRef)) {
|
448 | throw new Error("init must be assignable: " + node.TYPE);
|
449 | }
|
450 | });
|
451 | }
|
452 | must_be_expression(this, "object");
|
453 | },
|
454 | }, AST_IterationStatement);
|
455 |
|
456 | var AST_ForIn = DEFNODE("ForIn", null, {
|
457 | $documentation: "A `for ... in` statement",
|
458 | }, AST_ForEnumeration);
|
459 |
|
460 | var AST_ForOf = DEFNODE("ForOf", null, {
|
461 | $documentation: "A `for ... of` statement",
|
462 | }, AST_ForEnumeration);
|
463 |
|
464 | var AST_ForAwaitOf = DEFNODE("ForAwaitOf", null, {
|
465 | $documentation: "A `for await ... of` statement",
|
466 | }, AST_ForOf);
|
467 |
|
468 | var AST_With = DEFNODE("With", "expression", {
|
469 | $documentation: "A `with` statement",
|
470 | $propdoc: {
|
471 | expression: "[AST_Node] the `with` expression"
|
472 | },
|
473 | walk: function(visitor) {
|
474 | var node = this;
|
475 | visitor.visit(node, function() {
|
476 | node.expression.walk(visitor);
|
477 | node.body.walk(visitor);
|
478 | });
|
479 | },
|
480 | _validate: function() {
|
481 | must_be_expression(this, "expression");
|
482 | },
|
483 | }, AST_StatementWithBody);
|
484 |
|
485 |
|
486 |
|
487 | var AST_Scope = DEFNODE("Scope", "uses_eval uses_with", {
|
488 | $documentation: "Base class for all statements introducing a lexical scope",
|
489 | $propdoc: {
|
490 | uses_eval: "[boolean/S] tells whether this scope contains a direct call to the global `eval`",
|
491 | uses_with: "[boolean/S] tells whether this scope uses the `with` statement",
|
492 | },
|
493 | pinned: function() {
|
494 | return this.uses_eval || this.uses_with;
|
495 | },
|
496 | resolve: return_this,
|
497 | _validate: function() {
|
498 | if (this.TYPE == "Scope") throw new Error("should not instantiate AST_Scope");
|
499 | },
|
500 | }, AST_Block);
|
501 |
|
502 | var AST_Toplevel = DEFNODE("Toplevel", "globals", {
|
503 | $documentation: "The toplevel scope",
|
504 | $propdoc: {
|
505 | globals: "[Dictionary/S] a map of name ---> SymbolDef for all undeclared names",
|
506 | },
|
507 | wrap: function(name) {
|
508 | var body = this.body;
|
509 | return parse([
|
510 | "(function(exports){'$ORIG';})(typeof ",
|
511 | name,
|
512 | "=='undefined'?(",
|
513 | name,
|
514 | "={}):",
|
515 | name,
|
516 | ");"
|
517 | ].join(""), {
|
518 | filename: "wrap=" + JSON.stringify(name)
|
519 | }).transform(new TreeTransformer(function(node) {
|
520 | if (node instanceof AST_Directive && node.value == "$ORIG") {
|
521 | return List.splice(body);
|
522 | }
|
523 | }));
|
524 | },
|
525 | enclose: function(args_values) {
|
526 | if (typeof args_values != "string") args_values = "";
|
527 | var index = args_values.indexOf(":");
|
528 | if (index < 0) index = args_values.length;
|
529 | var body = this.body;
|
530 | return parse([
|
531 | "(function(",
|
532 | args_values.slice(0, index),
|
533 | '){"$ORIG"})(',
|
534 | args_values.slice(index + 1),
|
535 | ")"
|
536 | ].join(""), {
|
537 | filename: "enclose=" + JSON.stringify(args_values)
|
538 | }).transform(new TreeTransformer(function(node) {
|
539 | if (node instanceof AST_Directive && node.value == "$ORIG") {
|
540 | return List.splice(body);
|
541 | }
|
542 | }));
|
543 | }
|
544 | }, AST_Scope);
|
545 |
|
546 | var AST_Lambda = DEFNODE("Lambda", "argnames length_read rest uses_arguments", {
|
547 | $documentation: "Base class for functions",
|
548 | $propdoc: {
|
549 | argnames: "[(AST_DefaultValue|AST_Destructured|AST_SymbolFunarg)*] array of function arguments and/or destructured literals",
|
550 | length_read: "[boolean/S] whether length property of this function is accessed",
|
551 | rest: "[(AST_Destructured|AST_SymbolFunarg)?] rest parameter, or null if absent",
|
552 | uses_arguments: "[boolean/S] whether this function accesses the arguments array",
|
553 | },
|
554 | each_argname: function(visit) {
|
555 | var tw = new TreeWalker(function(node) {
|
556 | if (node instanceof AST_DefaultValue) {
|
557 | node.name.walk(tw);
|
558 | return true;
|
559 | }
|
560 | if (node instanceof AST_DestructuredKeyVal) {
|
561 | node.value.walk(tw);
|
562 | return true;
|
563 | }
|
564 | if (node instanceof AST_SymbolFunarg) visit(node);
|
565 | });
|
566 | this.argnames.forEach(function(argname) {
|
567 | argname.walk(tw);
|
568 | });
|
569 | if (this.rest) this.rest.walk(tw);
|
570 | },
|
571 | walk: function(visitor) {
|
572 | var node = this;
|
573 | visitor.visit(node, function() {
|
574 | if (node.name) node.name.walk(visitor);
|
575 | node.argnames.forEach(function(argname) {
|
576 | argname.walk(visitor);
|
577 | });
|
578 | if (node.rest) node.rest.walk(visitor);
|
579 | walk_body(node, visitor);
|
580 | });
|
581 | },
|
582 | _validate: function() {
|
583 | if (this.TYPE == "Lambda") throw new Error("should not instantiate AST_Lambda");
|
584 | this.argnames.forEach(function(node) {
|
585 | validate_destructured(node, function(node) {
|
586 | if (!(node instanceof AST_SymbolFunarg)) throw new Error("argnames must be AST_SymbolFunarg[]");
|
587 | }, true);
|
588 | });
|
589 | if (this.rest != null) validate_destructured(this.rest, function(node) {
|
590 | if (!(node instanceof AST_SymbolFunarg)) throw new Error("rest must be AST_SymbolFunarg");
|
591 | });
|
592 | },
|
593 | }, AST_Scope);
|
594 |
|
595 | var AST_Accessor = DEFNODE("Accessor", null, {
|
596 | $documentation: "A getter/setter function",
|
597 | _validate: function() {
|
598 | if (this.name != null) throw new Error("name must be null");
|
599 | },
|
600 | }, AST_Lambda);
|
601 |
|
602 | var AST_LambdaExpression = DEFNODE("LambdaExpression", "inlined", {
|
603 | $documentation: "Base class for function expressions",
|
604 | $propdoc: {
|
605 | inlined: "[boolean/S] whether this function has been inlined",
|
606 | },
|
607 | _validate: function() {
|
608 | if (this.TYPE == "LambdaExpression") throw new Error("should not instantiate AST_LambdaExpression");
|
609 | },
|
610 | }, AST_Lambda);
|
611 |
|
612 | function is_arrow(node) {
|
613 | return node instanceof AST_Arrow || node instanceof AST_AsyncArrow;
|
614 | }
|
615 |
|
616 | function is_async(node) {
|
617 | return node instanceof AST_AsyncArrow
|
618 | || node instanceof AST_AsyncDefun
|
619 | || node instanceof AST_AsyncFunction
|
620 | || node instanceof AST_AsyncGeneratorDefun
|
621 | || node instanceof AST_AsyncGeneratorFunction;
|
622 | }
|
623 |
|
624 | function is_generator(node) {
|
625 | return node instanceof AST_AsyncGeneratorDefun
|
626 | || node instanceof AST_AsyncGeneratorFunction
|
627 | || node instanceof AST_GeneratorDefun
|
628 | || node instanceof AST_GeneratorFunction;
|
629 | }
|
630 |
|
631 | function walk_lambda(node, tw) {
|
632 | if (is_arrow(node) && node.value) {
|
633 | node.value.walk(tw);
|
634 | } else {
|
635 | walk_body(node, tw);
|
636 | }
|
637 | }
|
638 |
|
639 | var AST_Arrow = DEFNODE("Arrow", "value", {
|
640 | $documentation: "An arrow function expression",
|
641 | $propdoc: {
|
642 | value: "[AST_Node?] simple return expression, or null if using function body.",
|
643 | },
|
644 | walk: function(visitor) {
|
645 | var node = this;
|
646 | visitor.visit(node, function() {
|
647 | node.argnames.forEach(function(argname) {
|
648 | argname.walk(visitor);
|
649 | });
|
650 | if (node.rest) node.rest.walk(visitor);
|
651 | if (node.value) {
|
652 | node.value.walk(visitor);
|
653 | } else {
|
654 | walk_body(node, visitor);
|
655 | }
|
656 | });
|
657 | },
|
658 | _validate: function() {
|
659 | if (this.name != null) throw new Error("name must be null");
|
660 | if (this.uses_arguments) throw new Error("uses_arguments must be false");
|
661 | if (this.value != null) {
|
662 | must_be_expression(this, "value");
|
663 | if (this.body.length) throw new Error("body must be empty if value exists");
|
664 | }
|
665 | },
|
666 | }, AST_LambdaExpression);
|
667 |
|
668 | var AST_AsyncArrow = DEFNODE("AsyncArrow", "value", {
|
669 | $documentation: "An asynchronous arrow function expression",
|
670 | $propdoc: {
|
671 | value: "[AST_Node?] simple return expression, or null if using function body.",
|
672 | },
|
673 | walk: function(visitor) {
|
674 | var node = this;
|
675 | visitor.visit(node, function() {
|
676 | node.argnames.forEach(function(argname) {
|
677 | argname.walk(visitor);
|
678 | });
|
679 | if (node.rest) node.rest.walk(visitor);
|
680 | if (node.value) {
|
681 | node.value.walk(visitor);
|
682 | } else {
|
683 | walk_body(node, visitor);
|
684 | }
|
685 | });
|
686 | },
|
687 | _validate: function() {
|
688 | if (this.name != null) throw new Error("name must be null");
|
689 | if (this.uses_arguments) throw new Error("uses_arguments must be false");
|
690 | if (this.value != null) {
|
691 | must_be_expression(this, "value");
|
692 | if (this.body.length) throw new Error("body must be empty if value exists");
|
693 | }
|
694 | },
|
695 | }, AST_LambdaExpression);
|
696 |
|
697 | var AST_AsyncFunction = DEFNODE("AsyncFunction", "name", {
|
698 | $documentation: "An asynchronous function expression",
|
699 | $propdoc: {
|
700 | name: "[AST_SymbolLambda?] the name of this function, or null if not specified",
|
701 | },
|
702 | _validate: function() {
|
703 | if (this.name != null) {
|
704 | if (!(this.name instanceof AST_SymbolLambda)) throw new Error("name must be AST_SymbolLambda");
|
705 | }
|
706 | },
|
707 | }, AST_LambdaExpression);
|
708 |
|
709 | var AST_AsyncGeneratorFunction = DEFNODE("AsyncGeneratorFunction", "name", {
|
710 | $documentation: "An asynchronous generator function expression",
|
711 | $propdoc: {
|
712 | name: "[AST_SymbolLambda?] the name of this function, or null if not specified",
|
713 | },
|
714 | _validate: function() {
|
715 | if (this.name != null) {
|
716 | if (!(this.name instanceof AST_SymbolLambda)) throw new Error("name must be AST_SymbolLambda");
|
717 | }
|
718 | },
|
719 | }, AST_LambdaExpression);
|
720 |
|
721 | var AST_Function = DEFNODE("Function", "name", {
|
722 | $documentation: "A function expression",
|
723 | $propdoc: {
|
724 | name: "[AST_SymbolLambda?] the name of this function, or null if not specified",
|
725 | },
|
726 | _validate: function() {
|
727 | if (this.name != null) {
|
728 | if (!(this.name instanceof AST_SymbolLambda)) throw new Error("name must be AST_SymbolLambda");
|
729 | }
|
730 | },
|
731 | }, AST_LambdaExpression);
|
732 |
|
733 | var AST_GeneratorFunction = DEFNODE("GeneratorFunction", "name", {
|
734 | $documentation: "A generator function expression",
|
735 | $propdoc: {
|
736 | name: "[AST_SymbolLambda?] the name of this function, or null if not specified",
|
737 | },
|
738 | _validate: function() {
|
739 | if (this.name != null) {
|
740 | if (!(this.name instanceof AST_SymbolLambda)) throw new Error("name must be AST_SymbolLambda");
|
741 | }
|
742 | },
|
743 | }, AST_LambdaExpression);
|
744 |
|
745 | var AST_LambdaDefinition = DEFNODE("LambdaDefinition", "inlined name", {
|
746 | $documentation: "Base class for function definitions",
|
747 | $propdoc: {
|
748 | inlined: "[boolean/S] whether this function has been inlined",
|
749 | name: "[AST_SymbolDefun] the name of this function",
|
750 | },
|
751 | _validate: function() {
|
752 | if (this.TYPE == "LambdaDefinition") throw new Error("should not instantiate AST_LambdaDefinition");
|
753 | if (!(this.name instanceof AST_SymbolDefun)) throw new Error("name must be AST_SymbolDefun");
|
754 | },
|
755 | }, AST_Lambda);
|
756 |
|
757 | var AST_AsyncDefun = DEFNODE("AsyncDefun", null, {
|
758 | $documentation: "An asynchronous function definition",
|
759 | }, AST_LambdaDefinition);
|
760 |
|
761 | var AST_AsyncGeneratorDefun = DEFNODE("AsyncGeneratorDefun", null, {
|
762 | $documentation: "An asynchronous generator function definition",
|
763 | }, AST_LambdaDefinition);
|
764 |
|
765 | var AST_Defun = DEFNODE("Defun", null, {
|
766 | $documentation: "A function definition",
|
767 | }, AST_LambdaDefinition);
|
768 |
|
769 | var AST_GeneratorDefun = DEFNODE("GeneratorDefun", null, {
|
770 | $documentation: "A generator function definition",
|
771 | }, AST_LambdaDefinition);
|
772 |
|
773 |
|
774 |
|
775 | var AST_Class = DEFNODE("Class", "extends name properties", {
|
776 | $documentation: "Base class for class literals",
|
777 | $propdoc: {
|
778 | extends: "[AST_Node?] the super class, or null if not specified",
|
779 | properties: "[AST_ClassProperty*] array of class properties",
|
780 | },
|
781 | walk: function(visitor) {
|
782 | var node = this;
|
783 | visitor.visit(node, function() {
|
784 | if (node.name) node.name.walk(visitor);
|
785 | if (node.extends) node.extends.walk(visitor);
|
786 | node.properties.forEach(function(prop) {
|
787 | prop.walk(visitor);
|
788 | });
|
789 | });
|
790 | },
|
791 | _validate: function() {
|
792 | if (this.TYPE == "Class") throw new Error("should not instantiate AST_Class");
|
793 | if (this.extends != null) must_be_expression(this, "extends");
|
794 | this.properties.forEach(function(node) {
|
795 | if (!(node instanceof AST_ClassProperty)) throw new Error("properties must contain AST_ClassProperty");
|
796 | });
|
797 | },
|
798 | }, AST_BlockScope);
|
799 |
|
800 | var AST_DefClass = DEFNODE("DefClass", null, {
|
801 | $documentation: "A class definition",
|
802 | $propdoc: {
|
803 | name: "[AST_SymbolDefClass] the name of this class",
|
804 | },
|
805 | _validate: function() {
|
806 | if (!(this.name instanceof AST_SymbolDefClass)) throw new Error("name must be AST_SymbolDefClass");
|
807 | },
|
808 | }, AST_Class);
|
809 |
|
810 | var AST_ClassExpression = DEFNODE("ClassExpression", null, {
|
811 | $documentation: "A class expression",
|
812 | $propdoc: {
|
813 | name: "[AST_SymbolClass?] the name of this class, or null if not specified",
|
814 | },
|
815 | _validate: function() {
|
816 | if (this.name != null) {
|
817 | if (!(this.name instanceof AST_SymbolClass)) throw new Error("name must be AST_SymbolClass");
|
818 | }
|
819 | },
|
820 | }, AST_Class);
|
821 |
|
822 | var AST_ClassProperty = DEFNODE("ClassProperty", "key private static value", {
|
823 | $documentation: "Base class for `class` properties",
|
824 | $propdoc: {
|
825 | key: "[string|AST_Node] property name (AST_Node for computed property)",
|
826 | private: "[boolean] whether this is a private property",
|
827 | static: "[boolean] whether this is a static property",
|
828 | value: "[AST_Node?] property value (AST_Accessor for getters/setters, AST_LambdaExpression for methods, null if not specified for fields)",
|
829 | },
|
830 | walk: function(visitor) {
|
831 | var node = this;
|
832 | visitor.visit(node, function() {
|
833 | if (node.key instanceof AST_Node) node.key.walk(visitor);
|
834 | if (node.value) node.value.walk(visitor);
|
835 | });
|
836 | },
|
837 | _validate: function() {
|
838 | if (this.TYPE == "ClassProperty") throw new Error("should not instantiate AST_ClassProperty");
|
839 | if (typeof this.key != "string") {
|
840 | if (!(this.key instanceof AST_Node)) throw new Error("key must be string or AST_Node");
|
841 | must_be_expression(this, "key");
|
842 | }
|
843 | if(this.value != null) {
|
844 | if (!(this.value instanceof AST_Node)) throw new Error("value must be AST_Node");
|
845 | }
|
846 | },
|
847 | });
|
848 |
|
849 | var AST_ClassField = DEFNODE("ClassField", null, {
|
850 | $documentation: "A `class` field",
|
851 | _validate: function() {
|
852 | if(this.value != null) must_be_expression(this, "value");
|
853 | },
|
854 | }, AST_ClassProperty);
|
855 |
|
856 | var AST_ClassGetter = DEFNODE("ClassGetter", null, {
|
857 | $documentation: "A `class` getter",
|
858 | _validate: function() {
|
859 | if (!(this.value instanceof AST_Accessor)) throw new Error("value must be AST_Accessor");
|
860 | },
|
861 | }, AST_ClassProperty);
|
862 |
|
863 | var AST_ClassSetter = DEFNODE("ClassSetter", null, {
|
864 | $documentation: "A `class` setter",
|
865 | _validate: function() {
|
866 | if (!(this.value instanceof AST_Accessor)) throw new Error("value must be AST_Accessor");
|
867 | },
|
868 | }, AST_ClassProperty);
|
869 |
|
870 | var AST_ClassMethod = DEFNODE("ClassMethod", null, {
|
871 | $documentation: "A `class` method",
|
872 | _validate: function() {
|
873 | if (!(this.value instanceof AST_LambdaExpression)) throw new Error("value must be AST_LambdaExpression");
|
874 | if (is_arrow(this.value)) throw new Error("value cannot be AST_Arrow or AST_AsyncArrow");
|
875 | if (this.value.name != null) throw new Error("name of class method's lambda must be null");
|
876 | },
|
877 | }, AST_ClassProperty);
|
878 |
|
879 |
|
880 |
|
881 | var AST_Jump = DEFNODE("Jump", null, {
|
882 | $documentation: "Base class for “jumps” (for now that's `return`, `throw`, `break` and `continue`)",
|
883 | _validate: function() {
|
884 | if (this.TYPE == "Jump") throw new Error("should not instantiate AST_Jump");
|
885 | },
|
886 | }, AST_Statement);
|
887 |
|
888 | var AST_Exit = DEFNODE("Exit", "value", {
|
889 | $documentation: "Base class for “exits” (`return` and `throw`)",
|
890 | $propdoc: {
|
891 | value: "[AST_Node?] the value returned or thrown by this statement; could be null for AST_Return"
|
892 | },
|
893 | walk: function(visitor) {
|
894 | var node = this;
|
895 | visitor.visit(node, function() {
|
896 | if (node.value) node.value.walk(visitor);
|
897 | });
|
898 | },
|
899 | _validate: function() {
|
900 | if (this.TYPE == "Exit") throw new Error("should not instantiate AST_Exit");
|
901 | },
|
902 | }, AST_Jump);
|
903 |
|
904 | var AST_Return = DEFNODE("Return", null, {
|
905 | $documentation: "A `return` statement",
|
906 | _validate: function() {
|
907 | if (this.value != null) must_be_expression(this, "value");
|
908 | },
|
909 | }, AST_Exit);
|
910 |
|
911 | var AST_Throw = DEFNODE("Throw", null, {
|
912 | $documentation: "A `throw` statement",
|
913 | _validate: function() {
|
914 | must_be_expression(this, "value");
|
915 | },
|
916 | }, AST_Exit);
|
917 |
|
918 | var AST_LoopControl = DEFNODE("LoopControl", "label", {
|
919 | $documentation: "Base class for loop control statements (`break` and `continue`)",
|
920 | $propdoc: {
|
921 | label: "[AST_LabelRef?] the label, or null if none",
|
922 | },
|
923 | walk: function(visitor) {
|
924 | var node = this;
|
925 | visitor.visit(node, function() {
|
926 | if (node.label) node.label.walk(visitor);
|
927 | });
|
928 | },
|
929 | _validate: function() {
|
930 | if (this.TYPE == "LoopControl") throw new Error("should not instantiate AST_LoopControl");
|
931 | if (this.label != null) {
|
932 | if (!(this.label instanceof AST_LabelRef)) throw new Error("label must be AST_LabelRef");
|
933 | }
|
934 | },
|
935 | }, AST_Jump);
|
936 |
|
937 | var AST_Break = DEFNODE("Break", null, {
|
938 | $documentation: "A `break` statement"
|
939 | }, AST_LoopControl);
|
940 |
|
941 | var AST_Continue = DEFNODE("Continue", null, {
|
942 | $documentation: "A `continue` statement"
|
943 | }, AST_LoopControl);
|
944 |
|
945 |
|
946 |
|
947 | var AST_If = DEFNODE("If", "condition alternative", {
|
948 | $documentation: "A `if` statement",
|
949 | $propdoc: {
|
950 | condition: "[AST_Node] the `if` condition",
|
951 | alternative: "[AST_Statement?] the `else` part, or null if not present"
|
952 | },
|
953 | walk: function(visitor) {
|
954 | var node = this;
|
955 | visitor.visit(node, function() {
|
956 | node.condition.walk(visitor);
|
957 | node.body.walk(visitor);
|
958 | if (node.alternative) node.alternative.walk(visitor);
|
959 | });
|
960 | },
|
961 | _validate: function() {
|
962 | must_be_expression(this, "condition");
|
963 | if (this.alternative != null) {
|
964 | if (!is_statement(this.alternative)) throw new Error("alternative must be AST_Statement");
|
965 | }
|
966 | },
|
967 | }, AST_StatementWithBody);
|
968 |
|
969 |
|
970 |
|
971 | var AST_Switch = DEFNODE("Switch", "expression", {
|
972 | $documentation: "A `switch` statement",
|
973 | $propdoc: {
|
974 | expression: "[AST_Node] the `switch` “discriminant”"
|
975 | },
|
976 | walk: function(visitor) {
|
977 | var node = this;
|
978 | visitor.visit(node, function() {
|
979 | node.expression.walk(visitor);
|
980 | walk_body(node, visitor);
|
981 | });
|
982 | },
|
983 | _validate: function() {
|
984 | must_be_expression(this, "expression");
|
985 | this.body.forEach(function(node) {
|
986 | if (!(node instanceof AST_SwitchBranch)) throw new Error("body must be AST_SwitchBranch[]");
|
987 | });
|
988 | },
|
989 | }, AST_Block);
|
990 |
|
991 | var AST_SwitchBranch = DEFNODE("SwitchBranch", null, {
|
992 | $documentation: "Base class for `switch` branches",
|
993 | _validate: function() {
|
994 | if (this.TYPE == "SwitchBranch") throw new Error("should not instantiate AST_SwitchBranch");
|
995 | },
|
996 | }, AST_Block);
|
997 |
|
998 | var AST_Default = DEFNODE("Default", null, {
|
999 | $documentation: "A `default` switch branch",
|
1000 | }, AST_SwitchBranch);
|
1001 |
|
1002 | var AST_Case = DEFNODE("Case", "expression", {
|
1003 | $documentation: "A `case` switch branch",
|
1004 | $propdoc: {
|
1005 | expression: "[AST_Node] the `case` expression"
|
1006 | },
|
1007 | walk: function(visitor) {
|
1008 | var node = this;
|
1009 | visitor.visit(node, function() {
|
1010 | node.expression.walk(visitor);
|
1011 | walk_body(node, visitor);
|
1012 | });
|
1013 | },
|
1014 | _validate: function() {
|
1015 | must_be_expression(this, "expression");
|
1016 | },
|
1017 | }, AST_SwitchBranch);
|
1018 |
|
1019 |
|
1020 |
|
1021 | var AST_Try = DEFNODE("Try", "bcatch bfinally", {
|
1022 | $documentation: "A `try` statement",
|
1023 | $propdoc: {
|
1024 | bcatch: "[AST_Catch?] the catch block, or null if not present",
|
1025 | bfinally: "[AST_Finally?] the finally block, or null if not present"
|
1026 | },
|
1027 | walk: function(visitor) {
|
1028 | var node = this;
|
1029 | visitor.visit(node, function() {
|
1030 | walk_body(node, visitor);
|
1031 | if (node.bcatch) node.bcatch.walk(visitor);
|
1032 | if (node.bfinally) node.bfinally.walk(visitor);
|
1033 | });
|
1034 | },
|
1035 | _validate: function() {
|
1036 | if (this.bcatch != null) {
|
1037 | if (!(this.bcatch instanceof AST_Catch)) throw new Error("bcatch must be AST_Catch");
|
1038 | }
|
1039 | if (this.bfinally != null) {
|
1040 | if (!(this.bfinally instanceof AST_Finally)) throw new Error("bfinally must be AST_Finally");
|
1041 | }
|
1042 | },
|
1043 | }, AST_Block);
|
1044 |
|
1045 | var AST_Catch = DEFNODE("Catch", "argname", {
|
1046 | $documentation: "A `catch` node; only makes sense as part of a `try` statement",
|
1047 | $propdoc: {
|
1048 | argname: "[(AST_Destructured|AST_SymbolCatch)?] symbol for the exception, or null if not present",
|
1049 | },
|
1050 | walk: function(visitor) {
|
1051 | var node = this;
|
1052 | visitor.visit(node, function() {
|
1053 | if (node.argname) node.argname.walk(visitor);
|
1054 | walk_body(node, visitor);
|
1055 | });
|
1056 | },
|
1057 | _validate: function() {
|
1058 | if (this.argname != null) validate_destructured(this.argname, function(node) {
|
1059 | if (!(node instanceof AST_SymbolCatch)) throw new Error("argname must be AST_SymbolCatch");
|
1060 | });
|
1061 | },
|
1062 | }, AST_Block);
|
1063 |
|
1064 | var AST_Finally = DEFNODE("Finally", null, {
|
1065 | $documentation: "A `finally` node; only makes sense as part of a `try` statement"
|
1066 | }, AST_Block);
|
1067 |
|
1068 |
|
1069 |
|
1070 | var AST_Definitions = DEFNODE("Definitions", "definitions", {
|
1071 | $documentation: "Base class for `var` nodes (variable declarations/initializations)",
|
1072 | $propdoc: {
|
1073 | definitions: "[AST_VarDef*] array of variable definitions"
|
1074 | },
|
1075 | walk: function(visitor) {
|
1076 | var node = this;
|
1077 | visitor.visit(node, function() {
|
1078 | node.definitions.forEach(function(defn) {
|
1079 | defn.walk(visitor);
|
1080 | });
|
1081 | });
|
1082 | },
|
1083 | _validate: function() {
|
1084 | if (this.TYPE == "Definitions") throw new Error("should not instantiate AST_Definitions");
|
1085 | if (this.definitions.length < 1) throw new Error("must have at least one definition");
|
1086 | },
|
1087 | }, AST_Statement);
|
1088 |
|
1089 | var AST_Const = DEFNODE("Const", null, {
|
1090 | $documentation: "A `const` statement",
|
1091 | _validate: function() {
|
1092 | this.definitions.forEach(function(node) {
|
1093 | if (!(node instanceof AST_VarDef)) throw new Error("definitions must be AST_VarDef[]");
|
1094 | validate_destructured(node.name, function(node) {
|
1095 | if (!(node instanceof AST_SymbolConst)) throw new Error("name must be AST_SymbolConst");
|
1096 | });
|
1097 | });
|
1098 | },
|
1099 | }, AST_Definitions);
|
1100 |
|
1101 | var AST_Let = DEFNODE("Let", null, {
|
1102 | $documentation: "A `let` statement",
|
1103 | _validate: function() {
|
1104 | this.definitions.forEach(function(node) {
|
1105 | if (!(node instanceof AST_VarDef)) throw new Error("definitions must be AST_VarDef[]");
|
1106 | validate_destructured(node.name, function(node) {
|
1107 | if (!(node instanceof AST_SymbolLet)) throw new Error("name must be AST_SymbolLet");
|
1108 | });
|
1109 | });
|
1110 | },
|
1111 | }, AST_Definitions);
|
1112 |
|
1113 | var AST_Var = DEFNODE("Var", null, {
|
1114 | $documentation: "A `var` statement",
|
1115 | _validate: function() {
|
1116 | this.definitions.forEach(function(node) {
|
1117 | if (!(node instanceof AST_VarDef)) throw new Error("definitions must be AST_VarDef[]");
|
1118 | validate_destructured(node.name, function(node) {
|
1119 | if (!(node instanceof AST_SymbolVar)) throw new Error("name must be AST_SymbolVar");
|
1120 | });
|
1121 | });
|
1122 | },
|
1123 | }, AST_Definitions);
|
1124 |
|
1125 | var AST_VarDef = DEFNODE("VarDef", "name value", {
|
1126 | $documentation: "A variable declaration; only appears in a AST_Definitions node",
|
1127 | $propdoc: {
|
1128 | name: "[AST_Destructured|AST_SymbolVar] name of the variable",
|
1129 | value: "[AST_Node?] initializer, or null of there's no initializer",
|
1130 | },
|
1131 | walk: function(visitor) {
|
1132 | var node = this;
|
1133 | visitor.visit(node, function() {
|
1134 | node.name.walk(visitor);
|
1135 | if (node.value) node.value.walk(visitor);
|
1136 | });
|
1137 | },
|
1138 | _validate: function() {
|
1139 | if (this.value != null) must_be_expression(this, "value");
|
1140 | },
|
1141 | });
|
1142 |
|
1143 |
|
1144 |
|
1145 | var AST_ExportDeclaration = DEFNODE("ExportDeclaration", "body", {
|
1146 | $documentation: "An `export` statement",
|
1147 | $propdoc: {
|
1148 | body: "[AST_DefClass|AST_Definitions|AST_LambdaDefinition] the statement to export",
|
1149 | },
|
1150 | walk: function(visitor) {
|
1151 | var node = this;
|
1152 | visitor.visit(node, function() {
|
1153 | node.body.walk(visitor);
|
1154 | });
|
1155 | },
|
1156 | _validate: function() {
|
1157 | if (!(this.body instanceof AST_DefClass
|
1158 | || this.body instanceof AST_Definitions
|
1159 | || this.body instanceof AST_LambdaDefinition)) {
|
1160 | throw new Error("body must be AST_DefClass, AST_Definitions or AST_LambdaDefinition");
|
1161 | }
|
1162 | },
|
1163 | }, AST_Statement);
|
1164 |
|
1165 | var AST_ExportDefault = DEFNODE("ExportDefault", "body", {
|
1166 | $documentation: "An `export default` statement",
|
1167 | $propdoc: {
|
1168 | body: "[AST_Node] the default export",
|
1169 | },
|
1170 | walk: function(visitor) {
|
1171 | var node = this;
|
1172 | visitor.visit(node, function() {
|
1173 | node.body.walk(visitor);
|
1174 | });
|
1175 | },
|
1176 | _validate: function() {
|
1177 | if (!(this.body instanceof AST_DefClass || this.body instanceof AST_LambdaDefinition)) {
|
1178 | must_be_expression(this, "body");
|
1179 | }
|
1180 | },
|
1181 | }, AST_Statement);
|
1182 |
|
1183 | var AST_ExportForeign = DEFNODE("ExportForeign", "aliases keys path quote", {
|
1184 | $documentation: "An `export ... from '...'` statement",
|
1185 | $propdoc: {
|
1186 | aliases: "[string*] array of aliases to export",
|
1187 | keys: "[string*] array of keys to import",
|
1188 | path: "[string] the path to import module",
|
1189 | quote: "[string?] the original quote character",
|
1190 | },
|
1191 | _validate: function() {
|
1192 | if (this.aliases.length != this.keys.length) {
|
1193 | throw new Error("aliases:key length mismatch: " + this.aliases.length + " != " + this.keys.length);
|
1194 | }
|
1195 | this.aliases.forEach(function(name) {
|
1196 | if (typeof name != "string") throw new Error("aliases must contain string");
|
1197 | });
|
1198 | this.keys.forEach(function(name) {
|
1199 | if (typeof name != "string") throw new Error("keys must contain string");
|
1200 | });
|
1201 | if (typeof this.path != "string") throw new Error("path must be string");
|
1202 | if (this.quote != null) {
|
1203 | if (typeof this.quote != "string") throw new Error("quote must be string");
|
1204 | if (!/^["']$/.test(this.quote)) throw new Error("invalid quote: " + this.quote);
|
1205 | }
|
1206 | },
|
1207 | }, AST_Statement);
|
1208 |
|
1209 | var AST_ExportReferences = DEFNODE("ExportReferences", "properties", {
|
1210 | $documentation: "An `export { ... }` statement",
|
1211 | $propdoc: {
|
1212 | properties: "[AST_SymbolExport*] array of aliases to export",
|
1213 | },
|
1214 | walk: function(visitor) {
|
1215 | var node = this;
|
1216 | visitor.visit(node, function() {
|
1217 | node.properties.forEach(function(prop) {
|
1218 | prop.walk(visitor);
|
1219 | });
|
1220 | });
|
1221 | },
|
1222 | _validate: function() {
|
1223 | this.properties.forEach(function(prop) {
|
1224 | if (!(prop instanceof AST_SymbolExport)) throw new Error("properties must contain AST_SymbolExport");
|
1225 | });
|
1226 | },
|
1227 | }, AST_Statement);
|
1228 |
|
1229 | var AST_Import = DEFNODE("Import", "all default path properties quote", {
|
1230 | $documentation: "An `import` statement",
|
1231 | $propdoc: {
|
1232 | all: "[AST_SymbolImport?] the imported namespace, or null if not specified",
|
1233 | default: "[AST_SymbolImport?] the alias for default `export`, or null if not specified",
|
1234 | path: "[string] the path to import module",
|
1235 | properties: "[(AST_SymbolImport*)?] array of aliases, or null if not specified",
|
1236 | quote: "[string?] the original quote character",
|
1237 | },
|
1238 | walk: function(visitor) {
|
1239 | var node = this;
|
1240 | visitor.visit(node, function() {
|
1241 | if (node.all) node.all.walk(visitor);
|
1242 | if (node.default) node.default.walk(visitor);
|
1243 | if (node.properties) node.properties.forEach(function(prop) {
|
1244 | prop.walk(visitor);
|
1245 | });
|
1246 | });
|
1247 | },
|
1248 | _validate: function() {
|
1249 | if (this.all != null) {
|
1250 | if (!(this.all instanceof AST_SymbolImport)) throw new Error("all must be AST_SymbolImport");
|
1251 | if (this.properties != null) throw new Error("cannot import both * and {} in the same statement");
|
1252 | }
|
1253 | if (this.default != null) {
|
1254 | if (!(this.default instanceof AST_SymbolImport)) throw new Error("default must be AST_SymbolImport");
|
1255 | if (this.default.key !== "") throw new Error("invalid default key: " + this.default.key);
|
1256 | }
|
1257 | if (typeof this.path != "string") throw new Error("path must be string");
|
1258 | if (this.properties != null) this.properties.forEach(function(node) {
|
1259 | if (!(node instanceof AST_SymbolImport)) throw new Error("properties must contain AST_SymbolImport");
|
1260 | });
|
1261 | if (this.quote != null) {
|
1262 | if (typeof this.quote != "string") throw new Error("quote must be string");
|
1263 | if (!/^["']$/.test(this.quote)) throw new Error("invalid quote: " + this.quote);
|
1264 | }
|
1265 | },
|
1266 | }, AST_Statement);
|
1267 |
|
1268 | var AST_DefaultValue = DEFNODE("DefaultValue", "name value", {
|
1269 | $documentation: "A default value declaration",
|
1270 | $propdoc: {
|
1271 | name: "[AST_Destructured|AST_SymbolDeclaration] name of the variable",
|
1272 | value: "[AST_Node] value to assign if variable is `undefined`",
|
1273 | },
|
1274 | walk: function(visitor) {
|
1275 | var node = this;
|
1276 | visitor.visit(node, function() {
|
1277 | node.name.walk(visitor);
|
1278 | node.value.walk(visitor);
|
1279 | });
|
1280 | },
|
1281 | _validate: function() {
|
1282 | must_be_expression(this, "value");
|
1283 | },
|
1284 | });
|
1285 |
|
1286 | function must_be_expressions(node, prop, allow_spread, allow_hole) {
|
1287 | node[prop].forEach(function(node) {
|
1288 | validate_expression(node, prop, true, allow_spread, allow_hole);
|
1289 | });
|
1290 | }
|
1291 |
|
1292 | var AST_Call = DEFNODE("Call", "args expression optional pure terminal", {
|
1293 | $documentation: "A function call expression",
|
1294 | $propdoc: {
|
1295 | args: "[AST_Node*] array of arguments",
|
1296 | expression: "[AST_Node] expression to invoke as function",
|
1297 | optional: "[boolean] whether the expression is optional chaining",
|
1298 | pure: "[string/S] marker for side-effect-free call expression",
|
1299 | terminal: "[boolean] whether the chain has ended",
|
1300 | },
|
1301 | walk: function(visitor) {
|
1302 | var node = this;
|
1303 | visitor.visit(node, function() {
|
1304 | node.expression.walk(visitor);
|
1305 | node.args.forEach(function(arg) {
|
1306 | arg.walk(visitor);
|
1307 | });
|
1308 | });
|
1309 | },
|
1310 | _validate: function() {
|
1311 | must_be_expression(this, "expression");
|
1312 | must_be_expressions(this, "args", true);
|
1313 | },
|
1314 | });
|
1315 |
|
1316 | var AST_New = DEFNODE("New", null, {
|
1317 | $documentation: "An object instantiation. Derives from a function call since it has exactly the same properties",
|
1318 | _validate: function() {
|
1319 | if (this.optional) throw new Error("optional must be false");
|
1320 | if (this.terminal) throw new Error("terminal must be false");
|
1321 | },
|
1322 | }, AST_Call);
|
1323 |
|
1324 | var AST_Sequence = DEFNODE("Sequence", "expressions", {
|
1325 | $documentation: "A sequence expression (comma-separated expressions)",
|
1326 | $propdoc: {
|
1327 | expressions: "[AST_Node*] array of expressions (at least two)"
|
1328 | },
|
1329 | walk: function(visitor) {
|
1330 | var node = this;
|
1331 | visitor.visit(node, function() {
|
1332 | node.expressions.forEach(function(expr) {
|
1333 | expr.walk(visitor);
|
1334 | });
|
1335 | });
|
1336 | },
|
1337 | _validate: function() {
|
1338 | if (this.expressions.length < 2) throw new Error("expressions must contain multiple elements");
|
1339 | must_be_expressions(this, "expressions");
|
1340 | },
|
1341 | });
|
1342 |
|
1343 | function root_expr(prop) {
|
1344 | while (prop instanceof AST_PropAccess) prop = prop.expression;
|
1345 | return prop;
|
1346 | }
|
1347 |
|
1348 | var AST_PropAccess = DEFNODE("PropAccess", "expression optional property terminal", {
|
1349 | $documentation: "Base class for property access expressions, i.e. `a.foo` or `a[\"foo\"]`",
|
1350 | $propdoc: {
|
1351 | expression: "[AST_Node] the “container” expression",
|
1352 | optional: "[boolean] whether the expression is optional chaining",
|
1353 | property: "[AST_Node|string] the property to access. For AST_Dot this is always a plain string, while for AST_Sub it's an arbitrary AST_Node",
|
1354 | terminal: "[boolean] whether the chain has ended",
|
1355 | },
|
1356 | get_property: function() {
|
1357 | var p = this.property;
|
1358 | if (p instanceof AST_Constant) return p.value;
|
1359 | if (p instanceof AST_UnaryPrefix && p.operator == "void" && p.expression instanceof AST_Constant) return;
|
1360 | return p;
|
1361 | },
|
1362 | _validate: function() {
|
1363 | if (this.TYPE == "PropAccess") throw new Error("should not instantiate AST_PropAccess");
|
1364 | must_be_expression(this, "expression");
|
1365 | },
|
1366 | });
|
1367 |
|
1368 | var AST_Dot = DEFNODE("Dot", null, {
|
1369 | $documentation: "A dotted property access expression",
|
1370 | walk: function(visitor) {
|
1371 | var node = this;
|
1372 | visitor.visit(node, function() {
|
1373 | node.expression.walk(visitor);
|
1374 | });
|
1375 | },
|
1376 | _validate: function() {
|
1377 | if (typeof this.property != "string") throw new Error("property must be string");
|
1378 | },
|
1379 | }, AST_PropAccess);
|
1380 |
|
1381 | var AST_Sub = DEFNODE("Sub", null, {
|
1382 | $documentation: "Index-style property access, i.e. `a[\"foo\"]`",
|
1383 | walk: function(visitor) {
|
1384 | var node = this;
|
1385 | visitor.visit(node, function() {
|
1386 | node.expression.walk(visitor);
|
1387 | node.property.walk(visitor);
|
1388 | });
|
1389 | },
|
1390 | _validate: function() {
|
1391 | must_be_expression(this, "property");
|
1392 | },
|
1393 | }, AST_PropAccess);
|
1394 |
|
1395 | var AST_Spread = DEFNODE("Spread", "expression", {
|
1396 | $documentation: "Spread expression in array/object literals or function calls",
|
1397 | $propdoc: {
|
1398 | expression: "[AST_Node] expression to be expanded",
|
1399 | },
|
1400 | walk: function(visitor) {
|
1401 | var node = this;
|
1402 | visitor.visit(node, function() {
|
1403 | node.expression.walk(visitor);
|
1404 | });
|
1405 | },
|
1406 | _validate: function() {
|
1407 | must_be_expression(this, "expression");
|
1408 | },
|
1409 | });
|
1410 |
|
1411 | var AST_Unary = DEFNODE("Unary", "operator expression", {
|
1412 | $documentation: "Base class for unary expressions",
|
1413 | $propdoc: {
|
1414 | operator: "[string] the operator",
|
1415 | expression: "[AST_Node] expression that this unary operator applies to"
|
1416 | },
|
1417 | walk: function(visitor) {
|
1418 | var node = this;
|
1419 | visitor.visit(node, function() {
|
1420 | node.expression.walk(visitor);
|
1421 | });
|
1422 | },
|
1423 | _validate: function() {
|
1424 | if (this.TYPE == "Unary") throw new Error("should not instantiate AST_Unary");
|
1425 | if (typeof this.operator != "string") throw new Error("operator must be string");
|
1426 | must_be_expression(this, "expression");
|
1427 | },
|
1428 | });
|
1429 |
|
1430 | var AST_UnaryPrefix = DEFNODE("UnaryPrefix", null, {
|
1431 | $documentation: "Unary prefix expression, i.e. `typeof i` or `++i`"
|
1432 | }, AST_Unary);
|
1433 |
|
1434 | var AST_UnaryPostfix = DEFNODE("UnaryPostfix", null, {
|
1435 | $documentation: "Unary postfix expression, i.e. `i++`"
|
1436 | }, AST_Unary);
|
1437 |
|
1438 | var AST_Binary = DEFNODE("Binary", "operator left right", {
|
1439 | $documentation: "Binary expression, i.e. `a + b`",
|
1440 | $propdoc: {
|
1441 | left: "[AST_Node] left-hand side expression",
|
1442 | operator: "[string] the operator",
|
1443 | right: "[AST_Node] right-hand side expression"
|
1444 | },
|
1445 | walk: function(visitor) {
|
1446 | var node = this;
|
1447 | visitor.visit(node, function() {
|
1448 | node.left.walk(visitor);
|
1449 | node.right.walk(visitor);
|
1450 | });
|
1451 | },
|
1452 | _validate: function() {
|
1453 | if (!(this instanceof AST_Assign)) must_be_expression(this, "left");
|
1454 | if (typeof this.operator != "string") throw new Error("operator must be string");
|
1455 | must_be_expression(this, "right");
|
1456 | },
|
1457 | });
|
1458 |
|
1459 | var AST_Conditional = DEFNODE("Conditional", "condition consequent alternative", {
|
1460 | $documentation: "Conditional expression using the ternary operator, i.e. `a ? b : c`",
|
1461 | $propdoc: {
|
1462 | condition: "[AST_Node]",
|
1463 | consequent: "[AST_Node]",
|
1464 | alternative: "[AST_Node]"
|
1465 | },
|
1466 | walk: function(visitor) {
|
1467 | var node = this;
|
1468 | visitor.visit(node, function() {
|
1469 | node.condition.walk(visitor);
|
1470 | node.consequent.walk(visitor);
|
1471 | node.alternative.walk(visitor);
|
1472 | });
|
1473 | },
|
1474 | _validate: function() {
|
1475 | must_be_expression(this, "condition");
|
1476 | must_be_expression(this, "consequent");
|
1477 | must_be_expression(this, "alternative");
|
1478 | },
|
1479 | });
|
1480 |
|
1481 | var AST_Assign = DEFNODE("Assign", null, {
|
1482 | $documentation: "An assignment expression — `a = b + 5`",
|
1483 | _validate: function() {
|
1484 | if (this.operator.indexOf("=") < 0) throw new Error('operator must contain "="');
|
1485 | if (this.left instanceof AST_Destructured) {
|
1486 | if (this.operator != "=") throw new Error("invalid destructuring operator: " + this.operator);
|
1487 | validate_destructured(this.left, function(node) {
|
1488 | if (!(node instanceof AST_PropAccess || node instanceof AST_SymbolRef)) {
|
1489 | throw new Error("left must be assignable: " + node.TYPE);
|
1490 | }
|
1491 | });
|
1492 | }
|
1493 | },
|
1494 | }, AST_Binary);
|
1495 |
|
1496 | var AST_Await = DEFNODE("Await", "expression", {
|
1497 | $documentation: "An await expression",
|
1498 | $propdoc: {
|
1499 | expression: "[AST_Node] expression with Promise to resolve on",
|
1500 | },
|
1501 | walk: function(visitor) {
|
1502 | var node = this;
|
1503 | visitor.visit(node, function() {
|
1504 | node.expression.walk(visitor);
|
1505 | });
|
1506 | },
|
1507 | _validate: function() {
|
1508 | must_be_expression(this, "expression");
|
1509 | },
|
1510 | });
|
1511 |
|
1512 | var AST_Yield = DEFNODE("Yield", "expression nested", {
|
1513 | $documentation: "A yield expression",
|
1514 | $propdoc: {
|
1515 | expression: "[AST_Node?] return value for iterator, or null if undefined",
|
1516 | nested: "[boolean] whether to iterate over expression as generator",
|
1517 | },
|
1518 | walk: function(visitor) {
|
1519 | var node = this;
|
1520 | visitor.visit(node, function() {
|
1521 | if (node.expression) node.expression.walk(visitor);
|
1522 | });
|
1523 | },
|
1524 | _validate: function() {
|
1525 | if (this.expression != null) {
|
1526 | must_be_expression(this, "expression");
|
1527 | } else if (this.nested) {
|
1528 | throw new Error("yield* must contain expression");
|
1529 | }
|
1530 | },
|
1531 | });
|
1532 |
|
1533 |
|
1534 |
|
1535 | var AST_Array = DEFNODE("Array", "elements", {
|
1536 | $documentation: "An array literal",
|
1537 | $propdoc: {
|
1538 | elements: "[AST_Node*] array of elements"
|
1539 | },
|
1540 | walk: function(visitor) {
|
1541 | var node = this;
|
1542 | visitor.visit(node, function() {
|
1543 | node.elements.forEach(function(element) {
|
1544 | element.walk(visitor);
|
1545 | });
|
1546 | });
|
1547 | },
|
1548 | _validate: function() {
|
1549 | must_be_expressions(this, "elements", true, true);
|
1550 | },
|
1551 | });
|
1552 |
|
1553 | var AST_Destructured = DEFNODE("Destructured", "rest", {
|
1554 | $documentation: "Base class for destructured literal",
|
1555 | $propdoc: {
|
1556 | rest: "[(AST_Destructured|AST_SymbolDeclaration|AST_SymbolRef)?] rest parameter, or null if absent",
|
1557 | },
|
1558 | _validate: function() {
|
1559 | if (this.TYPE == "Destructured") throw new Error("should not instantiate AST_Destructured");
|
1560 | },
|
1561 | });
|
1562 |
|
1563 | function validate_destructured(node, check, allow_default) {
|
1564 | if (node instanceof AST_DefaultValue && allow_default) return validate_destructured(node.name, check);
|
1565 | if (node instanceof AST_Destructured) {
|
1566 | if (node.rest != null) validate_destructured(node.rest, check);
|
1567 | if (node instanceof AST_DestructuredArray) return node.elements.forEach(function(node) {
|
1568 | if (!(node instanceof AST_Hole)) validate_destructured(node, check, true);
|
1569 | });
|
1570 | if (node instanceof AST_DestructuredObject) return node.properties.forEach(function(prop) {
|
1571 | validate_destructured(prop.value, check, true);
|
1572 | });
|
1573 | }
|
1574 | check(node);
|
1575 | }
|
1576 |
|
1577 | var AST_DestructuredArray = DEFNODE("DestructuredArray", "elements", {
|
1578 | $documentation: "A destructured array literal",
|
1579 | $propdoc: {
|
1580 | elements: "[(AST_DefaultValue|AST_Destructured|AST_SymbolDeclaration|AST_SymbolRef)*] array of elements",
|
1581 | },
|
1582 | walk: function(visitor) {
|
1583 | var node = this;
|
1584 | visitor.visit(node, function() {
|
1585 | node.elements.forEach(function(element) {
|
1586 | element.walk(visitor);
|
1587 | });
|
1588 | if (node.rest) node.rest.walk(visitor);
|
1589 | });
|
1590 | },
|
1591 | }, AST_Destructured);
|
1592 |
|
1593 | var AST_DestructuredKeyVal = DEFNODE("DestructuredKeyVal", "key value", {
|
1594 | $documentation: "A key: value destructured property",
|
1595 | $propdoc: {
|
1596 | key: "[string|AST_Node] property name. For computed property this is an AST_Node.",
|
1597 | value: "[AST_DefaultValue|AST_Destructured|AST_SymbolDeclaration|AST_SymbolRef] property value",
|
1598 | },
|
1599 | walk: function(visitor) {
|
1600 | var node = this;
|
1601 | visitor.visit(node, function() {
|
1602 | if (node.key instanceof AST_Node) node.key.walk(visitor);
|
1603 | node.value.walk(visitor);
|
1604 | });
|
1605 | },
|
1606 | _validate: function() {
|
1607 | if (typeof this.key != "string") {
|
1608 | if (!(this.key instanceof AST_Node)) throw new Error("key must be string or AST_Node");
|
1609 | must_be_expression(this, "key");
|
1610 | }
|
1611 | if (!(this.value instanceof AST_Node)) throw new Error("value must be AST_Node");
|
1612 | },
|
1613 | });
|
1614 |
|
1615 | var AST_DestructuredObject = DEFNODE("DestructuredObject", "properties", {
|
1616 | $documentation: "A destructured object literal",
|
1617 | $propdoc: {
|
1618 | properties: "[AST_DestructuredKeyVal*] array of properties",
|
1619 | },
|
1620 | walk: function(visitor) {
|
1621 | var node = this;
|
1622 | visitor.visit(node, function() {
|
1623 | node.properties.forEach(function(prop) {
|
1624 | prop.walk(visitor);
|
1625 | });
|
1626 | if (node.rest) node.rest.walk(visitor);
|
1627 | });
|
1628 | },
|
1629 | _validate: function() {
|
1630 | this.properties.forEach(function(node) {
|
1631 | if (!(node instanceof AST_DestructuredKeyVal)) throw new Error("properties must be AST_DestructuredKeyVal[]");
|
1632 | });
|
1633 | },
|
1634 | }, AST_Destructured);
|
1635 |
|
1636 | var AST_Object = DEFNODE("Object", "properties", {
|
1637 | $documentation: "An object literal",
|
1638 | $propdoc: {
|
1639 | properties: "[(AST_ObjectProperty|AST_Spread)*] array of properties"
|
1640 | },
|
1641 | walk: function(visitor) {
|
1642 | var node = this;
|
1643 | visitor.visit(node, function() {
|
1644 | node.properties.forEach(function(prop) {
|
1645 | prop.walk(visitor);
|
1646 | });
|
1647 | });
|
1648 | },
|
1649 | _validate: function() {
|
1650 | this.properties.forEach(function(node) {
|
1651 | if (!(node instanceof AST_ObjectProperty || node instanceof AST_Spread)) {
|
1652 | throw new Error("properties must contain AST_ObjectProperty and/or AST_Spread only");
|
1653 | }
|
1654 | });
|
1655 | },
|
1656 | });
|
1657 |
|
1658 | var AST_ObjectProperty = DEFNODE("ObjectProperty", "key value", {
|
1659 | $documentation: "Base class for literal object properties",
|
1660 | $propdoc: {
|
1661 | key: "[string|AST_Node] property name. For computed property this is an AST_Node.",
|
1662 | value: "[AST_Node] property value. For getters and setters this is an AST_Accessor.",
|
1663 | },
|
1664 | walk: function(visitor) {
|
1665 | var node = this;
|
1666 | visitor.visit(node, function() {
|
1667 | if (node.key instanceof AST_Node) node.key.walk(visitor);
|
1668 | node.value.walk(visitor);
|
1669 | });
|
1670 | },
|
1671 | _validate: function() {
|
1672 | if (this.TYPE == "ObjectProperty") throw new Error("should not instantiate AST_ObjectProperty");
|
1673 | if (typeof this.key != "string") {
|
1674 | if (!(this.key instanceof AST_Node)) throw new Error("key must be string or AST_Node");
|
1675 | must_be_expression(this, "key");
|
1676 | }
|
1677 | if (!(this.value instanceof AST_Node)) throw new Error("value must be AST_Node");
|
1678 | },
|
1679 | });
|
1680 |
|
1681 | var AST_ObjectKeyVal = DEFNODE("ObjectKeyVal", null, {
|
1682 | $documentation: "A key: value object property",
|
1683 | _validate: function() {
|
1684 | must_be_expression(this, "value");
|
1685 | },
|
1686 | }, AST_ObjectProperty);
|
1687 |
|
1688 | var AST_ObjectMethod = DEFNODE("ObjectMethod", null, {
|
1689 | $documentation: "A key(){} object property",
|
1690 | _validate: function() {
|
1691 | if (!(this.value instanceof AST_LambdaExpression)) throw new Error("value must be AST_LambdaExpression");
|
1692 | if (is_arrow(this.value)) throw new Error("value cannot be AST_Arrow or AST_AsyncArrow");
|
1693 | if (this.value.name != null) throw new Error("name of object method's lambda must be null");
|
1694 | },
|
1695 | }, AST_ObjectKeyVal);
|
1696 |
|
1697 | var AST_ObjectSetter = DEFNODE("ObjectSetter", null, {
|
1698 | $documentation: "An object setter property",
|
1699 | _validate: function() {
|
1700 | if (!(this.value instanceof AST_Accessor)) throw new Error("value must be AST_Accessor");
|
1701 | },
|
1702 | }, AST_ObjectProperty);
|
1703 |
|
1704 | var AST_ObjectGetter = DEFNODE("ObjectGetter", null, {
|
1705 | $documentation: "An object getter property",
|
1706 | _validate: function() {
|
1707 | if (!(this.value instanceof AST_Accessor)) throw new Error("value must be AST_Accessor");
|
1708 | },
|
1709 | }, AST_ObjectProperty);
|
1710 |
|
1711 | var AST_Symbol = DEFNODE("Symbol", "scope name thedef", {
|
1712 | $documentation: "Base class for all symbols",
|
1713 | $propdoc: {
|
1714 | name: "[string] name of this symbol",
|
1715 | scope: "[AST_Scope/S] the current scope (not necessarily the definition scope)",
|
1716 | thedef: "[SymbolDef/S] the definition of this symbol"
|
1717 | },
|
1718 | _validate: function() {
|
1719 | if (this.TYPE == "Symbol") throw new Error("should not instantiate AST_Symbol");
|
1720 | if (typeof this.name != "string") throw new Error("name must be string");
|
1721 | },
|
1722 | });
|
1723 |
|
1724 | var AST_SymbolDeclaration = DEFNODE("SymbolDeclaration", "init", {
|
1725 | $documentation: "A declaration symbol (symbol in var, function name or argument, symbol in catch)",
|
1726 | }, AST_Symbol);
|
1727 |
|
1728 | var AST_SymbolConst = DEFNODE("SymbolConst", null, {
|
1729 | $documentation: "Symbol defining a constant",
|
1730 | }, AST_SymbolDeclaration);
|
1731 |
|
1732 | var AST_SymbolImport = DEFNODE("SymbolImport", "key", {
|
1733 | $documentation: "Symbol defined by an `import` statement",
|
1734 | $propdoc: {
|
1735 | key: "[string] the original `export` name",
|
1736 | },
|
1737 | _validate: function() {
|
1738 | if (typeof this.key != "string") throw new Error("key must be string");
|
1739 | },
|
1740 | }, AST_SymbolConst);
|
1741 |
|
1742 | var AST_SymbolLet = DEFNODE("SymbolLet", null, {
|
1743 | $documentation: "Symbol defining a lexical-scoped variable",
|
1744 | }, AST_SymbolDeclaration);
|
1745 |
|
1746 | var AST_SymbolVar = DEFNODE("SymbolVar", null, {
|
1747 | $documentation: "Symbol defining a variable",
|
1748 | }, AST_SymbolDeclaration);
|
1749 |
|
1750 | var AST_SymbolFunarg = DEFNODE("SymbolFunarg", null, {
|
1751 | $documentation: "Symbol naming a function argument",
|
1752 | }, AST_SymbolVar);
|
1753 |
|
1754 | var AST_SymbolDefun = DEFNODE("SymbolDefun", null, {
|
1755 | $documentation: "Symbol defining a function",
|
1756 | }, AST_SymbolDeclaration);
|
1757 |
|
1758 | var AST_SymbolLambda = DEFNODE("SymbolLambda", null, {
|
1759 | $documentation: "Symbol naming a function expression",
|
1760 | }, AST_SymbolDeclaration);
|
1761 |
|
1762 | var AST_SymbolDefClass = DEFNODE("SymbolDefClass", null, {
|
1763 | $documentation: "Symbol defining a class",
|
1764 | }, AST_SymbolConst);
|
1765 |
|
1766 | var AST_SymbolClass = DEFNODE("SymbolClass", null, {
|
1767 | $documentation: "Symbol naming a class expression",
|
1768 | }, AST_SymbolConst);
|
1769 |
|
1770 | var AST_SymbolCatch = DEFNODE("SymbolCatch", null, {
|
1771 | $documentation: "Symbol naming the exception in catch",
|
1772 | }, AST_SymbolDeclaration);
|
1773 |
|
1774 | var AST_Label = DEFNODE("Label", "references", {
|
1775 | $documentation: "Symbol naming a label (declaration)",
|
1776 | $propdoc: {
|
1777 | references: "[AST_LoopControl*] a list of nodes referring to this label"
|
1778 | },
|
1779 | initialize: function() {
|
1780 | this.references = [];
|
1781 | this.thedef = this;
|
1782 | }
|
1783 | }, AST_Symbol);
|
1784 |
|
1785 | var AST_SymbolRef = DEFNODE("SymbolRef", "fixed in_arg redef", {
|
1786 | $documentation: "Reference to some symbol (not definition/declaration)",
|
1787 | }, AST_Symbol);
|
1788 |
|
1789 | var AST_SymbolExport = DEFNODE("SymbolExport", "alias", {
|
1790 | $documentation: "Reference in an `export` statement",
|
1791 | $propdoc: {
|
1792 | alias: "[string] the `export` alias",
|
1793 | },
|
1794 | _validate: function() {
|
1795 | if (typeof this.alias != "string") throw new Error("alias must be string");
|
1796 | },
|
1797 | }, AST_SymbolRef);
|
1798 |
|
1799 | var AST_LabelRef = DEFNODE("LabelRef", null, {
|
1800 | $documentation: "Reference to a label symbol",
|
1801 | }, AST_Symbol);
|
1802 |
|
1803 | var AST_ObjectIdentity = DEFNODE("ObjectIdentity", null, {
|
1804 | $documentation: "Base class for `super` & `this`",
|
1805 | _validate: function() {
|
1806 | if (this.TYPE == "ObjectIdentity") throw new Error("should not instantiate AST_ObjectIdentity");
|
1807 | },
|
1808 | }, AST_Symbol);
|
1809 |
|
1810 | var AST_Super = DEFNODE("Super", null, {
|
1811 | $documentation: "The `super` symbol",
|
1812 | _validate: function() {
|
1813 | if (this.name !== "super") throw new Error('name must be "super"');
|
1814 | },
|
1815 | }, AST_ObjectIdentity);
|
1816 |
|
1817 | var AST_This = DEFNODE("This", null, {
|
1818 | $documentation: "The `this` symbol",
|
1819 | _validate: function() {
|
1820 | if (this.TYPE == "This" && this.name !== "this") throw new Error('name must be "this"');
|
1821 | },
|
1822 | }, AST_ObjectIdentity);
|
1823 |
|
1824 | var AST_NewTarget = DEFNODE("NewTarget", null, {
|
1825 | $documentation: "The `new.target` symbol",
|
1826 | initialize: function() {
|
1827 | this.name = "new.target";
|
1828 | },
|
1829 | _validate: function() {
|
1830 | if (this.name !== "new.target") throw new Error('name must be "new.target": ' + this.name);
|
1831 | },
|
1832 | }, AST_This);
|
1833 |
|
1834 | var AST_Template = DEFNODE("Template", "expressions strings tag", {
|
1835 | $documentation: "A template literal, i.e. tag`str1${expr1}...strN${exprN}strN+1`",
|
1836 | $propdoc: {
|
1837 | expressions: "[AST_Node*] the placeholder expressions",
|
1838 | strings: "[string*] the raw text segments",
|
1839 | tag: "[AST_Node] tag function, or null if absent",
|
1840 | },
|
1841 | walk: function(visitor) {
|
1842 | var node = this;
|
1843 | visitor.visit(node, function() {
|
1844 | if (node.tag) node.tag.walk(visitor);
|
1845 | node.expressions.forEach(function(expr) {
|
1846 | expr.walk(visitor);
|
1847 | });
|
1848 | });
|
1849 | },
|
1850 | _validate: function() {
|
1851 | if (this.expressions.length + 1 != this.strings.length) {
|
1852 | throw new Error("malformed template with " + this.expressions.length + " placeholder(s) but " + this.strings.length + " text segment(s)");
|
1853 | }
|
1854 | must_be_expressions(this, "expressions");
|
1855 | this.strings.forEach(function(string) {
|
1856 | if (typeof string != "string") throw new Error("strings must contain string");
|
1857 | });
|
1858 | if (this.tag != null) must_be_expression(this, "tag");
|
1859 | },
|
1860 | });
|
1861 |
|
1862 | var AST_Constant = DEFNODE("Constant", null, {
|
1863 | $documentation: "Base class for all constants",
|
1864 | _validate: function() {
|
1865 | if (this.TYPE == "Constant") throw new Error("should not instantiate AST_Constant");
|
1866 | },
|
1867 | });
|
1868 |
|
1869 | var AST_String = DEFNODE("String", "quote value", {
|
1870 | $documentation: "A string literal",
|
1871 | $propdoc: {
|
1872 | quote: "[string?] the original quote character",
|
1873 | value: "[string] the contents of this string",
|
1874 | },
|
1875 | _validate: function() {
|
1876 | if (this.quote != null) {
|
1877 | if (typeof this.quote != "string") throw new Error("quote must be string");
|
1878 | if (!/^["']$/.test(this.quote)) throw new Error("invalid quote: " + this.quote);
|
1879 | }
|
1880 | if (typeof this.value != "string") throw new Error("value must be string");
|
1881 | },
|
1882 | }, AST_Constant);
|
1883 |
|
1884 | var AST_Number = DEFNODE("Number", "value", {
|
1885 | $documentation: "A number literal",
|
1886 | $propdoc: {
|
1887 | value: "[number] the numeric value",
|
1888 | },
|
1889 | _validate: function() {
|
1890 | if (typeof this.value != "number") throw new Error("value must be number");
|
1891 | if (!isFinite(this.value)) throw new Error("value must be finite");
|
1892 | if (this.value < 0) throw new Error("value cannot be negative");
|
1893 | },
|
1894 | }, AST_Constant);
|
1895 |
|
1896 | var AST_BigInt = DEFNODE("BigInt", "value", {
|
1897 | $documentation: "A BigInt literal",
|
1898 | $propdoc: {
|
1899 | value: "[string] the numeric representation",
|
1900 | },
|
1901 | _validate: function() {
|
1902 | if (typeof this.value != "string") throw new Error("value must be string");
|
1903 | if (this.value[0] == "-") throw new Error("value cannot be negative");
|
1904 | },
|
1905 | }, AST_Constant);
|
1906 |
|
1907 | var AST_RegExp = DEFNODE("RegExp", "value", {
|
1908 | $documentation: "A regexp literal",
|
1909 | $propdoc: {
|
1910 | value: "[RegExp] the actual regexp"
|
1911 | },
|
1912 | _validate: function() {
|
1913 | if (!(this.value instanceof RegExp)) throw new Error("value must be RegExp");
|
1914 | },
|
1915 | }, AST_Constant);
|
1916 |
|
1917 | var AST_Atom = DEFNODE("Atom", null, {
|
1918 | $documentation: "Base class for atoms",
|
1919 | _validate: function() {
|
1920 | if (this.TYPE == "Atom") throw new Error("should not instantiate AST_Atom");
|
1921 | },
|
1922 | }, AST_Constant);
|
1923 |
|
1924 | var AST_Null = DEFNODE("Null", null, {
|
1925 | $documentation: "The `null` atom",
|
1926 | value: null
|
1927 | }, AST_Atom);
|
1928 |
|
1929 | var AST_NaN = DEFNODE("NaN", null, {
|
1930 | $documentation: "The impossible value",
|
1931 | value: 0/0
|
1932 | }, AST_Atom);
|
1933 |
|
1934 | var AST_Undefined = DEFNODE("Undefined", null, {
|
1935 | $documentation: "The `undefined` value",
|
1936 | value: function(){}()
|
1937 | }, AST_Atom);
|
1938 |
|
1939 | var AST_Hole = DEFNODE("Hole", null, {
|
1940 | $documentation: "A hole in an array",
|
1941 | value: function(){}()
|
1942 | }, AST_Atom);
|
1943 |
|
1944 | var AST_Infinity = DEFNODE("Infinity", null, {
|
1945 | $documentation: "The `Infinity` value",
|
1946 | value: 1/0
|
1947 | }, AST_Atom);
|
1948 |
|
1949 | var AST_Boolean = DEFNODE("Boolean", null, {
|
1950 | $documentation: "Base class for booleans",
|
1951 | _validate: function() {
|
1952 | if (this.TYPE == "Boolean") throw new Error("should not instantiate AST_Boolean");
|
1953 | },
|
1954 | }, AST_Atom);
|
1955 |
|
1956 | var AST_False = DEFNODE("False", null, {
|
1957 | $documentation: "The `false` atom",
|
1958 | value: false
|
1959 | }, AST_Boolean);
|
1960 |
|
1961 | var AST_True = DEFNODE("True", null, {
|
1962 | $documentation: "The `true` atom",
|
1963 | value: true
|
1964 | }, AST_Boolean);
|
1965 |
|
1966 |
|
1967 |
|
1968 | function TreeWalker(callback) {
|
1969 | this.callback = callback;
|
1970 | this.directives = Object.create(null);
|
1971 | this.stack = [];
|
1972 | }
|
1973 | TreeWalker.prototype = {
|
1974 | visit: function(node, descend) {
|
1975 | this.push(node);
|
1976 | var done = this.callback(node, descend || noop);
|
1977 | if (!done && descend) descend();
|
1978 | this.pop();
|
1979 | },
|
1980 | parent: function(n) {
|
1981 | return this.stack[this.stack.length - 2 - (n || 0)];
|
1982 | },
|
1983 | push: function(node) {
|
1984 | if (node instanceof AST_Lambda) {
|
1985 | this.directives = Object.create(this.directives);
|
1986 | } else if (node instanceof AST_Directive && !this.directives[node.value]) {
|
1987 | this.directives[node.value] = node;
|
1988 | }
|
1989 | this.stack.push(node);
|
1990 | },
|
1991 | pop: function() {
|
1992 | var node = this.stack.pop();
|
1993 | if (node instanceof AST_Lambda) {
|
1994 | this.directives = Object.getPrototypeOf(this.directives);
|
1995 | }
|
1996 | },
|
1997 | self: function() {
|
1998 | return this.stack[this.stack.length - 1];
|
1999 | },
|
2000 | find_parent: function(type) {
|
2001 | var stack = this.stack;
|
2002 | for (var i = stack.length; --i >= 0;) {
|
2003 | var x = stack[i];
|
2004 | if (x instanceof type) return x;
|
2005 | }
|
2006 | },
|
2007 | has_directive: function(type) {
|
2008 | var dir = this.directives[type];
|
2009 | if (dir) return dir;
|
2010 | var node = this.stack[this.stack.length - 1];
|
2011 | if (node instanceof AST_Scope) {
|
2012 | for (var i = 0; i < node.body.length; ++i) {
|
2013 | var st = node.body[i];
|
2014 | if (!(st instanceof AST_Directive)) break;
|
2015 | if (st.value == type) return st;
|
2016 | }
|
2017 | }
|
2018 | },
|
2019 | loopcontrol_target: function(node) {
|
2020 | var stack = this.stack;
|
2021 | if (node.label) for (var i = stack.length; --i >= 0;) {
|
2022 | var x = stack[i];
|
2023 | if (x instanceof AST_LabeledStatement && x.label.name == node.label.name)
|
2024 | return x.body;
|
2025 | } else for (var i = stack.length; --i >= 0;) {
|
2026 | var x = stack[i];
|
2027 | if (x instanceof AST_IterationStatement
|
2028 | || node instanceof AST_Break && x instanceof AST_Switch)
|
2029 | return x;
|
2030 | }
|
2031 | },
|
2032 | in_boolean_context: function() {
|
2033 | var self = this.self();
|
2034 | for (var i = 0, p; p = this.parent(i); i++) {
|
2035 | if (p instanceof AST_Conditional && p.condition === self
|
2036 | || p instanceof AST_DWLoop && p.condition === self
|
2037 | || p instanceof AST_For && p.condition === self
|
2038 | || p instanceof AST_If && p.condition === self
|
2039 | || p instanceof AST_Return && p.in_bool
|
2040 | || p instanceof AST_Sequence && p.tail_node() !== self
|
2041 | || p instanceof AST_SimpleStatement
|
2042 | || p instanceof AST_UnaryPrefix && p.operator == "!" && p.expression === self) {
|
2043 | return true;
|
2044 | }
|
2045 | if (p instanceof AST_Binary && (p.operator == "&&" || p.operator == "||")
|
2046 | || p instanceof AST_Conditional
|
2047 | || p.tail_node() === self) {
|
2048 | self = p;
|
2049 | } else if (p instanceof AST_Return) {
|
2050 | for (var call, fn = p; call = this.parent(++i); fn = call) {
|
2051 | if (call.TYPE == "Call") {
|
2052 | if (!(fn instanceof AST_Lambda) || fn.name) return false;
|
2053 | } else if (fn instanceof AST_Lambda) {
|
2054 | return false;
|
2055 | }
|
2056 | }
|
2057 | } else {
|
2058 | return false;
|
2059 | }
|
2060 | }
|
2061 | }
|
2062 | };
|