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rOACCT/node_modules/@babel/plugin-transform-classes/lib/inline-createSuper-helpers.js
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inline-createSuper-helpers.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = addCreateSuperHelper;
var _core = require("@babel/core");
const helperIDs = new WeakMap();
function addCreateSuperHelper(file) {
if (helperIDs.has(file)) {
return (_core.types.cloneNode || _core.types.clone)(helperIDs.get(file));
}
try {
return file.addHelper("createSuper");
} catch (_unused) {}
const id = file.scope.generateUidIdentifier("createSuper");
helperIDs.set(file, id);
const fn = helper({
CREATE_SUPER: id,
GET_PROTOTYPE_OF: file.addHelper("getPrototypeOf"),
POSSIBLE_CONSTRUCTOR_RETURN: file.addHelper("possibleConstructorReturn")
});
file.path.unshiftContainer("body", [fn]);
file.scope.registerDeclaration(file.path.get("body.0"));
return _core.types.cloneNode(id);
}
const helper = _core.template.statement`
function CREATE_SUPER(Derived) {
function isNativeReflectConstruct() {
if (typeof Reflect === "undefined" || !Reflect.construct) return false;
// core-js@3
if (Reflect.construct.sham) return false;
// Proxy can't be polyfilled. Every browser implemented
// proxies before or at the same time as Reflect.construct,
// so if they support Proxy they also support Reflect.construct.
if (typeof Proxy === "function") return true;
// Since Reflect.construct can't be properly polyfilled, some
// implementations (e.g. core-js@2) don't set the correct internal slots.
// Those polyfills don't allow us to subclass built-ins, so we need to
// use our fallback implementation.
try {
// If the internal slots aren't set, this throws an error similar to
// TypeError: this is not a Date object.
Date.prototype.toString.call(Reflect.construct(Date, [], function() {}));
return true;
} catch (e) {
return false;
}
}
return function () {
var Super = GET_PROTOTYPE_OF(Derived), result;
if (isNativeReflectConstruct()) {
// NOTE: This doesn't work if this.__proto__.constructor has been modified.
var NewTarget = GET_PROTOTYPE_OF(this).constructor;
result = Reflect.construct(Super, arguments, NewTarget);
} else {
result = Super.apply(this, arguments);
}
return POSSIBLE_CONSTRUCTOR_RETURN(this, result);
}
}
`;
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