| 1 | "use strict";
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| 2 |
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| 3 | Object.defineProperty(exports, "__esModule", {
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| 4 | value: true
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| 5 | });
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| 6 | exports.default = void 0;
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| 7 | var _helperPluginUtils = require("@babel/helper-plugin-utils");
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| 8 | var _core = require("@babel/core");
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| 9 | var _default = exports.default = (0, _helperPluginUtils.declare)(api => {
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| 10 | api.assertVersion(7);
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| 11 | return {
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| 12 | name: "transform-new-target",
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| 13 | visitor: {
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| 14 | MetaProperty(path) {
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| 15 | const meta = path.get("meta");
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| 16 | const property = path.get("property");
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| 17 | const {
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| 18 | scope
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| 19 | } = path;
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| 20 | if (meta.isIdentifier({
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| 21 | name: "new"
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| 22 | }) && property.isIdentifier({
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| 23 | name: "target"
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| 24 | })) {
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| 25 | const func = path.findParent(path => {
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| 26 | if (path.isClass()) return true;
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| 27 | if (path.isFunction() && !path.isArrowFunctionExpression()) {
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| 28 | if (path.isClassMethod({
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| 29 | kind: "constructor"
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| 30 | })) {
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| 31 | return false;
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| 32 | }
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| 33 | return true;
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| 34 | }
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| 35 | return false;
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| 36 | });
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| 37 | if (!func) {
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| 38 | throw path.buildCodeFrameError("new.target must be under a (non-arrow) function or a class.");
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| 39 | }
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| 40 | const {
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| 41 | node
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| 42 | } = func;
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| 43 | if (_core.types.isMethod(node)) {
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| 44 | path.replaceWith(scope.buildUndefinedNode());
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| 45 | return;
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| 46 | }
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| 47 | const constructor = _core.types.memberExpression(_core.types.thisExpression(), _core.types.identifier("constructor"));
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| 48 | if (func.isClass()) {
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| 49 | path.replaceWith(constructor);
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| 50 | return;
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| 51 | }
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| 52 | if (!node.id) {
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| 53 | node.id = scope.generateUidIdentifier("target");
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| 54 | } else {
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| 55 | let scope = path.scope;
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| 56 | const name = node.id.name;
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| 57 | while (scope !== func.parentPath.scope) {
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| 58 | if (scope.hasOwnBinding(name) && !scope.bindingIdentifierEquals(name, node.id)) {
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| 59 | scope.rename(name);
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| 60 | }
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| 61 | scope = scope.parent;
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| 62 | }
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| 63 | }
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| 64 | path.replaceWith(_core.types.conditionalExpression(_core.types.binaryExpression("instanceof", _core.types.thisExpression(), _core.types.cloneNode(node.id)), constructor, scope.buildUndefinedNode()));
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| 65 | }
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| 66 | }
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| 67 | }
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| 68 | };
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| 69 | });
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| 70 |
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| 71 | //# sourceMappingURL=index.js.map
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