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Malte UblandClaude Opus 5.5
4da07089c9
A function expression's or arrow's parameter and return types commit at the statement that holds it, and a generic instance's at the instance drain. Both are now localized-failure commit points for declaration slots: the failing type degrades and the statement or instance lowers again. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
29 lines
1.1 KiB
TypeScript
29 lines
1.1 KiB
TypeScript
// Localized failure, stage L2: parameters and returns of arrows, function
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// expressions and generic instances become checked dynamic slots.
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type Hook = Map<string, (x: number) => string> | AbortSignal | (() => number) | Set<string>;
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interface Model<T> {
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id: T;
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hook: Hook;
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}
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function retry<T>(label: string, request: () => Promise<T> | Hook): T | string {
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const r = request();
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return typeof r === "function" ? label + ":" + String(r()) : label + ":other";
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}
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function describe<T>(model: Model<T>): string {
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return `${String(model.id)}/${model.hook instanceof Set ? model.hook.size : typeof model.hook}`;
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}
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const run = (hook: Hook, n: number): string => (typeof hook === "function" ? String(hook() + n) : "set");
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const make = function (size: number): Hook {
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return new Set(Array.from({ length: size }, (_, i) => `k${i}`));
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};
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console.log(run(() => 40, 2), run(new Set(["a"]), 1));
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const h = make(3);
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console.log(h instanceof Set ? h.size : -1);
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console.log(retry("a", () => () => 7), retry<number>("b", () => new Set<string>()));
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console.log(describe({ id: 5, hook: new Set(["x", "y"]) }), describe({ id: "s", hook: () => 1 }));
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