mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-23 06:10:02 +08:00
Chris Tate
1f10e83720
- Preserve callback identity, receiver binding, and class references across unions and collections. - Track record field presence independently of undefined values and improve native runtime behavior. - Expand differential coverage and streamline CI bootstrap and compiler rebuild checks.
52 lines
2.0 KiB
TypeScript
52 lines
2.0 KiB
TypeScript
const events: string[] = [];
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class Collector {
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value = 10;
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collect(...values: (number | undefined)[]): number {
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events.push("original");
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return this.value + values.reduce<number>((total, value) => total + (value ?? 0), 0);
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}
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}
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class DerivedCollector extends Collector {
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override collect(...values: (number | undefined)[]): number {
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events.push("derived");
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return this.value + values.length;
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}
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}
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const collector = new Collector();
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const derived: Collector = new DerivedCollector();
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function receiver(): Collector { events.push("receiver"); return collector; }
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function values(label: string, value: number): number[] {
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events.push(label);
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return [value, value + 1];
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}
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function replacement(this: Collector, ...values: (number | undefined)[]): number {
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events.push("replacement");
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return this.value * 10 + values.length;
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}
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console.log(collector.collect(...[1, 2]), derived.collect(...[3, 4]));
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Object.defineProperty(collector, "collect", { configurable: true, value: replacement });
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console.log(receiver().collect(...values("first", 1), 7, ...values("last", 3)));
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console.log(events.join(","));
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events.length = 0;
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Object.defineProperty(collector, "collect", {
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configurable: true,
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get() { events.push("get"); return replacement; },
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});
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function replaceDuringSpread(): number[] {
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events.push("spread");
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Object.defineProperty(collector, "collect", { configurable: true, value: () => -1 });
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return [4, 5];
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}
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console.log(receiver().collect(...replaceDuringSpread()));
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const empty: number[] = [];
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console.log(events.join(","), collector.collect(...empty));
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Object.defineProperty(collector, "collect", { value: replacement });
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const sparse: number[] = [];
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sparse.length = 3;
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sparse[1] = 9;
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console.log(collector.collect(...sparse));
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function fail(): number[] { events.push("throw"); throw new Error("stop"); }
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events.length = 0;
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try { receiver().collect(...fail(), ...values("unreachable", 8)); }
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catch (error) { console.log(error instanceof Error, events.join(",")); }
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