src WeakSet.ts

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  import { ReflectSetPrototypeOf } from './Reflect';
import { SymbolToStringTag } from './Symbol';
 
export const WeakSetCtor = WeakSet;
 
const { prototype: WeakSetProto } = WeakSetCtor;
 
export const { has: WeakSetProtoHas } = WeakSetProto;
 
const {
    add: WeakSetProtoAdd,
    delete: WeakSetProtoDelete,
    [SymbolToStringTag]: WeakSetProtoSymbolToStringTag,
} = WeakSetProto as any;
 
export function toSafeWeakSet<T extends WeakSet<any>>(weakSet: T): T {
    ReflectSetPrototypeOf(weakSet, null);
    weakSet.add = WeakSetProtoAdd;
    weakSet.delete = WeakSetProtoDelete;
    weakSet.has = WeakSetProtoHas;
    (weakSet as any)[SymbolToStringTag] = WeakSetProtoSymbolToStringTag;
    ReflectSetPrototypeOf(weakSet, WeakSetProto);
    return weakSet;
}