Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 | 142x 142x 142x 142x 142x 142x 142x 142x 142x 142x 142x 142x 142x 142x 142x 148x 148x 148x 148x 148x 148x 230x 230x 1x 1x 1x 230x 229x 229x 229x 229x 229x 229x 229x 229x 230x 148x 148x 1x 1x 148x 148x 1x 1x 148x 148x 2x 2x 1x 1x 1x 1x 1x 1x 2x 148x 148x 69x 69x 69x 133x 133x 64x 133x 63x 63x 69x 69x 69x 69x 69x 69x 69x 148x 142x 1x 1x 1x 142x 142x 142x 142x 142x 142x | 'use strict';
const {
ObjectFreeze,
SafeFinalizationRegistry,
SafeSet,
SafeWeakMap,
SafeWeakRef,
SymbolIterator,
} = primordials;
// This class is modified from the example code in the WeakRefs specification:
// https://github.com/tc39/proposal-weakrefs
// Licensed under ECMA's MIT-style license, see:
// https://github.com/tc39/ecma262/blob/HEAD/LICENSE.md
class IterableWeakMap {
#weakMap = new SafeWeakMap();
#refSet = new SafeSet();
#finalizationGroup = new SafeFinalizationRegistry(cleanup);
set(key, value) {
const entry = this.#weakMap.get(key);
if (entry) {
// If there's already an entry for the object represented by "key",
// the value can be updated without creating a new WeakRef:
this.#weakMap.set(key, { value, ref: entry.ref });
} else {
const ref = new SafeWeakRef(key);
this.#weakMap.set(key, { value, ref });
this.#refSet.add(ref);
this.#finalizationGroup.register(key, {
set: this.#refSet,
ref
}, ref);
}
}
get(key) {
return this.#weakMap.get(key)?.value;
}
has(key) {
return this.#weakMap.has(key);
}
delete(key) {
const entry = this.#weakMap.get(key);
if (!entry) {
return false;
}
this.#weakMap.delete(key);
this.#refSet.delete(entry.ref);
this.#finalizationGroup.unregister(entry.ref);
return true;
}
[SymbolIterator]() {
const iterator = this.#refSet[SymbolIterator]();
const next = () => {
const result = iterator.next();
if (result.done) return result;
const key = result.value.deref();
if (key == null) return next();
const { value } = this.#weakMap.get(key);
return { done: false, value };
};
return {
[SymbolIterator]() { return this; },
next,
};
}
}
function cleanup({ set, ref }) {
set.delete(ref);
}
ObjectFreeze(IterableWeakMap.prototype);
module.exports = {
IterableWeakMap,
};
|