source: trip-planner-front/node_modules/@babel/traverse/lib/scope/index.js@ 1ad8e64

Last change on this file since 1ad8e64 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit
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File size: 24.1 KB
Line 
1"use strict";
2
3Object.defineProperty(exports, "__esModule", {
4 value: true
5});
6exports.default = void 0;
7
8var _renamer = require("./lib/renamer");
9
10var _index = require("../index");
11
12var _binding = require("./binding");
13
14var _globals = require("globals");
15
16var _t = require("@babel/types");
17
18var _cache = require("../cache");
19
20const {
21 NOT_LOCAL_BINDING,
22 callExpression,
23 cloneNode,
24 getBindingIdentifiers,
25 identifier,
26 isArrayExpression,
27 isBinary,
28 isClass,
29 isClassBody,
30 isClassDeclaration,
31 isExportAllDeclaration,
32 isExportDefaultDeclaration,
33 isExportNamedDeclaration,
34 isFunctionDeclaration,
35 isIdentifier,
36 isImportDeclaration,
37 isLiteral,
38 isMethod,
39 isModuleDeclaration,
40 isModuleSpecifier,
41 isObjectExpression,
42 isProperty,
43 isPureish,
44 isSuper,
45 isTaggedTemplateExpression,
46 isTemplateLiteral,
47 isThisExpression,
48 isUnaryExpression,
49 isVariableDeclaration,
50 matchesPattern,
51 memberExpression,
52 numericLiteral,
53 toIdentifier,
54 unaryExpression,
55 variableDeclaration,
56 variableDeclarator
57} = _t;
58
59function gatherNodeParts(node, parts) {
60 switch (node == null ? void 0 : node.type) {
61 default:
62 if (isModuleDeclaration(node)) {
63 if ((isExportAllDeclaration(node) || isExportNamedDeclaration(node) || isImportDeclaration(node)) && node.source) {
64 gatherNodeParts(node.source, parts);
65 } else if ((isExportNamedDeclaration(node) || isImportDeclaration(node)) && node.specifiers && node.specifiers.length) {
66 for (const e of node.specifiers) gatherNodeParts(e, parts);
67 } else if ((isExportDefaultDeclaration(node) || isExportNamedDeclaration(node)) && node.declaration) {
68 gatherNodeParts(node.declaration, parts);
69 }
70 } else if (isModuleSpecifier(node)) {
71 gatherNodeParts(node.local, parts);
72 } else if (isLiteral(node)) {
73 parts.push(node.value);
74 }
75
76 break;
77
78 case "MemberExpression":
79 case "OptionalMemberExpression":
80 case "JSXMemberExpression":
81 gatherNodeParts(node.object, parts);
82 gatherNodeParts(node.property, parts);
83 break;
84
85 case "Identifier":
86 case "JSXIdentifier":
87 parts.push(node.name);
88 break;
89
90 case "CallExpression":
91 case "OptionalCallExpression":
92 case "NewExpression":
93 gatherNodeParts(node.callee, parts);
94 break;
95
96 case "ObjectExpression":
97 case "ObjectPattern":
98 for (const e of node.properties) {
99 gatherNodeParts(e, parts);
100 }
101
102 break;
103
104 case "SpreadElement":
105 case "RestElement":
106 gatherNodeParts(node.argument, parts);
107 break;
108
109 case "ObjectProperty":
110 case "ObjectMethod":
111 case "ClassProperty":
112 case "ClassMethod":
113 case "ClassPrivateProperty":
114 case "ClassPrivateMethod":
115 gatherNodeParts(node.key, parts);
116 break;
117
118 case "ThisExpression":
119 parts.push("this");
120 break;
121
122 case "Super":
123 parts.push("super");
124 break;
125
126 case "Import":
127 parts.push("import");
128 break;
129
130 case "DoExpression":
131 parts.push("do");
132 break;
133
134 case "YieldExpression":
135 parts.push("yield");
136 gatherNodeParts(node.argument, parts);
137 break;
138
139 case "AwaitExpression":
140 parts.push("await");
141 gatherNodeParts(node.argument, parts);
142 break;
143
144 case "AssignmentExpression":
145 gatherNodeParts(node.left, parts);
146 break;
147
148 case "VariableDeclarator":
149 gatherNodeParts(node.id, parts);
150 break;
151
152 case "FunctionExpression":
153 case "FunctionDeclaration":
154 case "ClassExpression":
155 case "ClassDeclaration":
156 gatherNodeParts(node.id, parts);
157 break;
158
159 case "PrivateName":
160 gatherNodeParts(node.id, parts);
161 break;
162
163 case "ParenthesizedExpression":
164 gatherNodeParts(node.expression, parts);
165 break;
166
167 case "UnaryExpression":
168 case "UpdateExpression":
169 gatherNodeParts(node.argument, parts);
170 break;
171
172 case "MetaProperty":
173 gatherNodeParts(node.meta, parts);
174 gatherNodeParts(node.property, parts);
175 break;
176
177 case "JSXElement":
178 gatherNodeParts(node.openingElement, parts);
179 break;
180
181 case "JSXOpeningElement":
182 parts.push(node.name);
183 break;
184
185 case "JSXFragment":
186 gatherNodeParts(node.openingFragment, parts);
187 break;
188
189 case "JSXOpeningFragment":
190 parts.push("Fragment");
191 break;
192
193 case "JSXNamespacedName":
194 gatherNodeParts(node.namespace, parts);
195 gatherNodeParts(node.name, parts);
196 break;
197 }
198}
199
200const collectorVisitor = {
201 ForStatement(path) {
202 const declar = path.get("init");
203
204 if (declar.isVar()) {
205 const {
206 scope
207 } = path;
208 const parentScope = scope.getFunctionParent() || scope.getProgramParent();
209 parentScope.registerBinding("var", declar);
210 }
211 },
212
213 Declaration(path) {
214 if (path.isBlockScoped()) return;
215 if (path.isImportDeclaration()) return;
216 if (path.isExportDeclaration()) return;
217 const parent = path.scope.getFunctionParent() || path.scope.getProgramParent();
218 parent.registerDeclaration(path);
219 },
220
221 ImportDeclaration(path) {
222 const parent = path.scope.getBlockParent();
223 parent.registerDeclaration(path);
224 },
225
226 ReferencedIdentifier(path, state) {
227 state.references.push(path);
228 },
229
230 ForXStatement(path, state) {
231 const left = path.get("left");
232
233 if (left.isPattern() || left.isIdentifier()) {
234 state.constantViolations.push(path);
235 } else if (left.isVar()) {
236 const {
237 scope
238 } = path;
239 const parentScope = scope.getFunctionParent() || scope.getProgramParent();
240 parentScope.registerBinding("var", left);
241 }
242 },
243
244 ExportDeclaration: {
245 exit(path) {
246 const {
247 node,
248 scope
249 } = path;
250 if (isExportAllDeclaration(node)) return;
251 const declar = node.declaration;
252
253 if (isClassDeclaration(declar) || isFunctionDeclaration(declar)) {
254 const id = declar.id;
255 if (!id) return;
256 const binding = scope.getBinding(id.name);
257 binding == null ? void 0 : binding.reference(path);
258 } else if (isVariableDeclaration(declar)) {
259 for (const decl of declar.declarations) {
260 for (const name of Object.keys(getBindingIdentifiers(decl))) {
261 const binding = scope.getBinding(name);
262 binding == null ? void 0 : binding.reference(path);
263 }
264 }
265 }
266 }
267
268 },
269
270 LabeledStatement(path) {
271 path.scope.getBlockParent().registerDeclaration(path);
272 },
273
274 AssignmentExpression(path, state) {
275 state.assignments.push(path);
276 },
277
278 UpdateExpression(path, state) {
279 state.constantViolations.push(path);
280 },
281
282 UnaryExpression(path, state) {
283 if (path.node.operator === "delete") {
284 state.constantViolations.push(path);
285 }
286 },
287
288 BlockScoped(path) {
289 let scope = path.scope;
290 if (scope.path === path) scope = scope.parent;
291 const parent = scope.getBlockParent();
292 parent.registerDeclaration(path);
293
294 if (path.isClassDeclaration() && path.node.id) {
295 const id = path.node.id;
296 const name = id.name;
297 path.scope.bindings[name] = path.scope.parent.getBinding(name);
298 }
299 },
300
301 CatchClause(path) {
302 path.scope.registerBinding("let", path);
303 },
304
305 Function(path) {
306 if (path.isFunctionExpression() && path.has("id") && !path.get("id").node[NOT_LOCAL_BINDING]) {
307 path.scope.registerBinding("local", path.get("id"), path);
308 }
309
310 const params = path.get("params");
311
312 for (const param of params) {
313 path.scope.registerBinding("param", param);
314 }
315 },
316
317 ClassExpression(path) {
318 if (path.has("id") && !path.get("id").node[NOT_LOCAL_BINDING]) {
319 path.scope.registerBinding("local", path);
320 }
321 }
322
323};
324let uid = 0;
325
326class Scope {
327 constructor(path) {
328 this.uid = void 0;
329 this.path = void 0;
330 this.block = void 0;
331 this.labels = void 0;
332 this.inited = void 0;
333 this.bindings = void 0;
334 this.references = void 0;
335 this.globals = void 0;
336 this.uids = void 0;
337 this.data = void 0;
338 this.crawling = void 0;
339 const {
340 node
341 } = path;
342
343 const cached = _cache.scope.get(node);
344
345 if ((cached == null ? void 0 : cached.path) === path) {
346 return cached;
347 }
348
349 _cache.scope.set(node, this);
350
351 this.uid = uid++;
352 this.block = node;
353 this.path = path;
354 this.labels = new Map();
355 this.inited = false;
356 }
357
358 get parent() {
359 var _parent;
360
361 let parent,
362 path = this.path;
363
364 do {
365 const isKey = path.key === "key";
366 path = path.parentPath;
367 if (isKey && path.isMethod()) path = path.parentPath;
368 if (path && path.isScope()) parent = path;
369 } while (path && !parent);
370
371 return (_parent = parent) == null ? void 0 : _parent.scope;
372 }
373
374 get parentBlock() {
375 return this.path.parent;
376 }
377
378 get hub() {
379 return this.path.hub;
380 }
381
382 traverse(node, opts, state) {
383 (0, _index.default)(node, opts, this, state, this.path);
384 }
385
386 generateDeclaredUidIdentifier(name) {
387 const id = this.generateUidIdentifier(name);
388 this.push({
389 id
390 });
391 return cloneNode(id);
392 }
393
394 generateUidIdentifier(name) {
395 return identifier(this.generateUid(name));
396 }
397
398 generateUid(name = "temp") {
399 name = toIdentifier(name).replace(/^_+/, "").replace(/[0-9]+$/g, "");
400 let uid;
401 let i = 1;
402
403 do {
404 uid = this._generateUid(name, i);
405 i++;
406 } while (this.hasLabel(uid) || this.hasBinding(uid) || this.hasGlobal(uid) || this.hasReference(uid));
407
408 const program = this.getProgramParent();
409 program.references[uid] = true;
410 program.uids[uid] = true;
411 return uid;
412 }
413
414 _generateUid(name, i) {
415 let id = name;
416 if (i > 1) id += i;
417 return `_${id}`;
418 }
419
420 generateUidBasedOnNode(node, defaultName) {
421 const parts = [];
422 gatherNodeParts(node, parts);
423 let id = parts.join("$");
424 id = id.replace(/^_/, "") || defaultName || "ref";
425 return this.generateUid(id.slice(0, 20));
426 }
427
428 generateUidIdentifierBasedOnNode(node, defaultName) {
429 return identifier(this.generateUidBasedOnNode(node, defaultName));
430 }
431
432 isStatic(node) {
433 if (isThisExpression(node) || isSuper(node)) {
434 return true;
435 }
436
437 if (isIdentifier(node)) {
438 const binding = this.getBinding(node.name);
439
440 if (binding) {
441 return binding.constant;
442 } else {
443 return this.hasBinding(node.name);
444 }
445 }
446
447 return false;
448 }
449
450 maybeGenerateMemoised(node, dontPush) {
451 if (this.isStatic(node)) {
452 return null;
453 } else {
454 const id = this.generateUidIdentifierBasedOnNode(node);
455
456 if (!dontPush) {
457 this.push({
458 id
459 });
460 return cloneNode(id);
461 }
462
463 return id;
464 }
465 }
466
467 checkBlockScopedCollisions(local, kind, name, id) {
468 if (kind === "param") return;
469 if (local.kind === "local") return;
470 const duplicate = kind === "let" || local.kind === "let" || local.kind === "const" || local.kind === "module" || local.kind === "param" && (kind === "let" || kind === "const");
471
472 if (duplicate) {
473 throw this.hub.buildError(id, `Duplicate declaration "${name}"`, TypeError);
474 }
475 }
476
477 rename(oldName, newName, block) {
478 const binding = this.getBinding(oldName);
479
480 if (binding) {
481 newName = newName || this.generateUidIdentifier(oldName).name;
482 return new _renamer.default(binding, oldName, newName).rename(block);
483 }
484 }
485
486 _renameFromMap(map, oldName, newName, value) {
487 if (map[oldName]) {
488 map[newName] = value;
489 map[oldName] = null;
490 }
491 }
492
493 dump() {
494 const sep = "-".repeat(60);
495 console.log(sep);
496 let scope = this;
497
498 do {
499 console.log("#", scope.block.type);
500
501 for (const name of Object.keys(scope.bindings)) {
502 const binding = scope.bindings[name];
503 console.log(" -", name, {
504 constant: binding.constant,
505 references: binding.references,
506 violations: binding.constantViolations.length,
507 kind: binding.kind
508 });
509 }
510 } while (scope = scope.parent);
511
512 console.log(sep);
513 }
514
515 toArray(node, i, arrayLikeIsIterable) {
516 if (isIdentifier(node)) {
517 const binding = this.getBinding(node.name);
518
519 if (binding != null && binding.constant && binding.path.isGenericType("Array")) {
520 return node;
521 }
522 }
523
524 if (isArrayExpression(node)) {
525 return node;
526 }
527
528 if (isIdentifier(node, {
529 name: "arguments"
530 })) {
531 return callExpression(memberExpression(memberExpression(memberExpression(identifier("Array"), identifier("prototype")), identifier("slice")), identifier("call")), [node]);
532 }
533
534 let helperName;
535 const args = [node];
536
537 if (i === true) {
538 helperName = "toConsumableArray";
539 } else if (i) {
540 args.push(numericLiteral(i));
541 helperName = "slicedToArray";
542 } else {
543 helperName = "toArray";
544 }
545
546 if (arrayLikeIsIterable) {
547 args.unshift(this.hub.addHelper(helperName));
548 helperName = "maybeArrayLike";
549 }
550
551 return callExpression(this.hub.addHelper(helperName), args);
552 }
553
554 hasLabel(name) {
555 return !!this.getLabel(name);
556 }
557
558 getLabel(name) {
559 return this.labels.get(name);
560 }
561
562 registerLabel(path) {
563 this.labels.set(path.node.label.name, path);
564 }
565
566 registerDeclaration(path) {
567 if (path.isLabeledStatement()) {
568 this.registerLabel(path);
569 } else if (path.isFunctionDeclaration()) {
570 this.registerBinding("hoisted", path.get("id"), path);
571 } else if (path.isVariableDeclaration()) {
572 const declarations = path.get("declarations");
573
574 for (const declar of declarations) {
575 this.registerBinding(path.node.kind, declar);
576 }
577 } else if (path.isClassDeclaration()) {
578 this.registerBinding("let", path);
579 } else if (path.isImportDeclaration()) {
580 const specifiers = path.get("specifiers");
581
582 for (const specifier of specifiers) {
583 this.registerBinding("module", specifier);
584 }
585 } else if (path.isExportDeclaration()) {
586 const declar = path.get("declaration");
587
588 if (declar.isClassDeclaration() || declar.isFunctionDeclaration() || declar.isVariableDeclaration()) {
589 this.registerDeclaration(declar);
590 }
591 } else {
592 this.registerBinding("unknown", path);
593 }
594 }
595
596 buildUndefinedNode() {
597 return unaryExpression("void", numericLiteral(0), true);
598 }
599
600 registerConstantViolation(path) {
601 const ids = path.getBindingIdentifiers();
602
603 for (const name of Object.keys(ids)) {
604 const binding = this.getBinding(name);
605 if (binding) binding.reassign(path);
606 }
607 }
608
609 registerBinding(kind, path, bindingPath = path) {
610 if (!kind) throw new ReferenceError("no `kind`");
611
612 if (path.isVariableDeclaration()) {
613 const declarators = path.get("declarations");
614
615 for (const declar of declarators) {
616 this.registerBinding(kind, declar);
617 }
618
619 return;
620 }
621
622 const parent = this.getProgramParent();
623 const ids = path.getOuterBindingIdentifiers(true);
624
625 for (const name of Object.keys(ids)) {
626 parent.references[name] = true;
627
628 for (const id of ids[name]) {
629 const local = this.getOwnBinding(name);
630
631 if (local) {
632 if (local.identifier === id) continue;
633 this.checkBlockScopedCollisions(local, kind, name, id);
634 }
635
636 if (local) {
637 this.registerConstantViolation(bindingPath);
638 } else {
639 this.bindings[name] = new _binding.default({
640 identifier: id,
641 scope: this,
642 path: bindingPath,
643 kind: kind
644 });
645 }
646 }
647 }
648 }
649
650 addGlobal(node) {
651 this.globals[node.name] = node;
652 }
653
654 hasUid(name) {
655 let scope = this;
656
657 do {
658 if (scope.uids[name]) return true;
659 } while (scope = scope.parent);
660
661 return false;
662 }
663
664 hasGlobal(name) {
665 let scope = this;
666
667 do {
668 if (scope.globals[name]) return true;
669 } while (scope = scope.parent);
670
671 return false;
672 }
673
674 hasReference(name) {
675 return !!this.getProgramParent().references[name];
676 }
677
678 isPure(node, constantsOnly) {
679 if (isIdentifier(node)) {
680 const binding = this.getBinding(node.name);
681 if (!binding) return false;
682 if (constantsOnly) return binding.constant;
683 return true;
684 } else if (isClass(node)) {
685 if (node.superClass && !this.isPure(node.superClass, constantsOnly)) {
686 return false;
687 }
688
689 return this.isPure(node.body, constantsOnly);
690 } else if (isClassBody(node)) {
691 for (const method of node.body) {
692 if (!this.isPure(method, constantsOnly)) return false;
693 }
694
695 return true;
696 } else if (isBinary(node)) {
697 return this.isPure(node.left, constantsOnly) && this.isPure(node.right, constantsOnly);
698 } else if (isArrayExpression(node)) {
699 for (const elem of node.elements) {
700 if (!this.isPure(elem, constantsOnly)) return false;
701 }
702
703 return true;
704 } else if (isObjectExpression(node)) {
705 for (const prop of node.properties) {
706 if (!this.isPure(prop, constantsOnly)) return false;
707 }
708
709 return true;
710 } else if (isMethod(node)) {
711 if (node.computed && !this.isPure(node.key, constantsOnly)) return false;
712 if (node.kind === "get" || node.kind === "set") return false;
713 return true;
714 } else if (isProperty(node)) {
715 if (node.computed && !this.isPure(node.key, constantsOnly)) return false;
716 return this.isPure(node.value, constantsOnly);
717 } else if (isUnaryExpression(node)) {
718 return this.isPure(node.argument, constantsOnly);
719 } else if (isTaggedTemplateExpression(node)) {
720 return matchesPattern(node.tag, "String.raw") && !this.hasBinding("String", true) && this.isPure(node.quasi, constantsOnly);
721 } else if (isTemplateLiteral(node)) {
722 for (const expression of node.expressions) {
723 if (!this.isPure(expression, constantsOnly)) return false;
724 }
725
726 return true;
727 } else {
728 return isPureish(node);
729 }
730 }
731
732 setData(key, val) {
733 return this.data[key] = val;
734 }
735
736 getData(key) {
737 let scope = this;
738
739 do {
740 const data = scope.data[key];
741 if (data != null) return data;
742 } while (scope = scope.parent);
743 }
744
745 removeData(key) {
746 let scope = this;
747
748 do {
749 const data = scope.data[key];
750 if (data != null) scope.data[key] = null;
751 } while (scope = scope.parent);
752 }
753
754 init() {
755 if (!this.inited) {
756 this.inited = true;
757 this.crawl();
758 }
759 }
760
761 crawl() {
762 const path = this.path;
763 this.references = Object.create(null);
764 this.bindings = Object.create(null);
765 this.globals = Object.create(null);
766 this.uids = Object.create(null);
767 this.data = Object.create(null);
768 const programParent = this.getProgramParent();
769 if (programParent.crawling) return;
770 const state = {
771 references: [],
772 constantViolations: [],
773 assignments: []
774 };
775 this.crawling = true;
776
777 if (path.type !== "Program" && collectorVisitor._exploded) {
778 for (const visit of collectorVisitor.enter) {
779 visit(path, state);
780 }
781
782 const typeVisitors = collectorVisitor[path.type];
783
784 if (typeVisitors) {
785 for (const visit of typeVisitors.enter) {
786 visit(path, state);
787 }
788 }
789 }
790
791 path.traverse(collectorVisitor, state);
792 this.crawling = false;
793
794 for (const path of state.assignments) {
795 const ids = path.getBindingIdentifiers();
796
797 for (const name of Object.keys(ids)) {
798 if (path.scope.getBinding(name)) continue;
799 programParent.addGlobal(ids[name]);
800 }
801
802 path.scope.registerConstantViolation(path);
803 }
804
805 for (const ref of state.references) {
806 const binding = ref.scope.getBinding(ref.node.name);
807
808 if (binding) {
809 binding.reference(ref);
810 } else {
811 programParent.addGlobal(ref.node);
812 }
813 }
814
815 for (const path of state.constantViolations) {
816 path.scope.registerConstantViolation(path);
817 }
818 }
819
820 push(opts) {
821 let path = this.path;
822
823 if (!path.isBlockStatement() && !path.isProgram()) {
824 path = this.getBlockParent().path;
825 }
826
827 if (path.isSwitchStatement()) {
828 path = (this.getFunctionParent() || this.getProgramParent()).path;
829 }
830
831 if (path.isLoop() || path.isCatchClause() || path.isFunction()) {
832 path.ensureBlock();
833 path = path.get("body");
834 }
835
836 const unique = opts.unique;
837 const kind = opts.kind || "var";
838 const blockHoist = opts._blockHoist == null ? 2 : opts._blockHoist;
839 const dataKey = `declaration:${kind}:${blockHoist}`;
840 let declarPath = !unique && path.getData(dataKey);
841
842 if (!declarPath) {
843 const declar = variableDeclaration(kind, []);
844 declar._blockHoist = blockHoist;
845 [declarPath] = path.unshiftContainer("body", [declar]);
846 if (!unique) path.setData(dataKey, declarPath);
847 }
848
849 const declarator = variableDeclarator(opts.id, opts.init);
850 declarPath.node.declarations.push(declarator);
851 this.registerBinding(kind, declarPath.get("declarations").pop());
852 }
853
854 getProgramParent() {
855 let scope = this;
856
857 do {
858 if (scope.path.isProgram()) {
859 return scope;
860 }
861 } while (scope = scope.parent);
862
863 throw new Error("Couldn't find a Program");
864 }
865
866 getFunctionParent() {
867 let scope = this;
868
869 do {
870 if (scope.path.isFunctionParent()) {
871 return scope;
872 }
873 } while (scope = scope.parent);
874
875 return null;
876 }
877
878 getBlockParent() {
879 let scope = this;
880
881 do {
882 if (scope.path.isBlockParent()) {
883 return scope;
884 }
885 } while (scope = scope.parent);
886
887 throw new Error("We couldn't find a BlockStatement, For, Switch, Function, Loop or Program...");
888 }
889
890 getAllBindings() {
891 const ids = Object.create(null);
892 let scope = this;
893
894 do {
895 for (const key of Object.keys(scope.bindings)) {
896 if (key in ids === false) {
897 ids[key] = scope.bindings[key];
898 }
899 }
900
901 scope = scope.parent;
902 } while (scope);
903
904 return ids;
905 }
906
907 getAllBindingsOfKind(...kinds) {
908 const ids = Object.create(null);
909
910 for (const kind of kinds) {
911 let scope = this;
912
913 do {
914 for (const name of Object.keys(scope.bindings)) {
915 const binding = scope.bindings[name];
916 if (binding.kind === kind) ids[name] = binding;
917 }
918
919 scope = scope.parent;
920 } while (scope);
921 }
922
923 return ids;
924 }
925
926 bindingIdentifierEquals(name, node) {
927 return this.getBindingIdentifier(name) === node;
928 }
929
930 getBinding(name) {
931 let scope = this;
932 let previousPath;
933
934 do {
935 const binding = scope.getOwnBinding(name);
936
937 if (binding) {
938 var _previousPath;
939
940 if ((_previousPath = previousPath) != null && _previousPath.isPattern() && binding.kind !== "param") {} else {
941 return binding;
942 }
943 }
944
945 previousPath = scope.path;
946 } while (scope = scope.parent);
947 }
948
949 getOwnBinding(name) {
950 return this.bindings[name];
951 }
952
953 getBindingIdentifier(name) {
954 var _this$getBinding;
955
956 return (_this$getBinding = this.getBinding(name)) == null ? void 0 : _this$getBinding.identifier;
957 }
958
959 getOwnBindingIdentifier(name) {
960 const binding = this.bindings[name];
961 return binding == null ? void 0 : binding.identifier;
962 }
963
964 hasOwnBinding(name) {
965 return !!this.getOwnBinding(name);
966 }
967
968 hasBinding(name, noGlobals) {
969 if (!name) return false;
970 if (this.hasOwnBinding(name)) return true;
971 if (this.parentHasBinding(name, noGlobals)) return true;
972 if (this.hasUid(name)) return true;
973 if (!noGlobals && Scope.globals.includes(name)) return true;
974 if (!noGlobals && Scope.contextVariables.includes(name)) return true;
975 return false;
976 }
977
978 parentHasBinding(name, noGlobals) {
979 var _this$parent;
980
981 return (_this$parent = this.parent) == null ? void 0 : _this$parent.hasBinding(name, noGlobals);
982 }
983
984 moveBindingTo(name, scope) {
985 const info = this.getBinding(name);
986
987 if (info) {
988 info.scope.removeOwnBinding(name);
989 info.scope = scope;
990 scope.bindings[name] = info;
991 }
992 }
993
994 removeOwnBinding(name) {
995 delete this.bindings[name];
996 }
997
998 removeBinding(name) {
999 var _this$getBinding2;
1000
1001 (_this$getBinding2 = this.getBinding(name)) == null ? void 0 : _this$getBinding2.scope.removeOwnBinding(name);
1002 let scope = this;
1003
1004 do {
1005 if (scope.uids[name]) {
1006 scope.uids[name] = false;
1007 }
1008 } while (scope = scope.parent);
1009 }
1010
1011}
1012
1013exports.default = Scope;
1014Scope.globals = Object.keys(_globals.builtin);
1015Scope.contextVariables = ["arguments", "undefined", "Infinity", "NaN"];
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