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- "use strict";
- const FixTracker = require("./utils/fix-tracker");
- const astUtils = require("./utils/ast-utils");
- const PATTERN_TYPE = /^(?:.+?Pattern|RestElement|SpreadProperty|ExperimentalRestProperty|Property)$/u;
- const DECLARATION_HOST_TYPE = /^(?:Program|BlockStatement|SwitchCase)$/u;
- const DESTRUCTURING_HOST_TYPE = /^(?:VariableDeclarator|AssignmentExpression)$/u;
- function isInitOfForStatement(node) {
- return node.parent.type === "ForStatement" && node.parent.init === node;
- }
- function canBecomeVariableDeclaration(identifier) {
- let node = identifier.parent;
- while (PATTERN_TYPE.test(node.type)) {
- node = node.parent;
- }
- return (
- node.type === "VariableDeclarator" ||
- (
- node.type === "AssignmentExpression" &&
- node.parent.type === "ExpressionStatement" &&
- DECLARATION_HOST_TYPE.test(node.parent.parent.type)
- )
- );
- }
- function isOuterVariableInDestructing(name, initScope) {
- if (initScope.through.find(ref => ref.resolved && ref.resolved.name === name)) {
- return true;
- }
- const variable = astUtils.getVariableByName(initScope, name);
- if (variable !== null) {
- return variable.defs.some(def => def.type === "Parameter");
- }
- return false;
- }
- function getDestructuringHost(reference) {
- if (!reference.isWrite()) {
- return null;
- }
- let node = reference.identifier.parent;
- while (PATTERN_TYPE.test(node.type)) {
- node = node.parent;
- }
- if (!DESTRUCTURING_HOST_TYPE.test(node.type)) {
- return null;
- }
- return node;
- }
- function hasMemberExpressionAssignment(node) {
- switch (node.type) {
- case "ObjectPattern":
- return node.properties.some(prop => {
- if (prop) {
-
- return hasMemberExpressionAssignment(prop.argument || prop.value);
- }
- return false;
- });
- case "ArrayPattern":
- return node.elements.some(element => {
- if (element) {
- return hasMemberExpressionAssignment(element);
- }
- return false;
- });
- case "AssignmentPattern":
- return hasMemberExpressionAssignment(node.left);
- case "MemberExpression":
- return true;
-
- }
- return false;
- }
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