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Malte UblandClaude Opus 5.5
982572c173
Arrays the checker types with unknown elements are stored checked-dynamic, and their methods dispatch on the runtime array. splice was missing from that dispatch table, so unknown[] receivers refused it, including generic bodies instantiated at unknown (pool.splice(i, 1) in a sample<T> helper gets such an instantiation once a program has a dynamic tier). The runtime's dynInvoke already implements splice; the table now names it, and arrays of unknown elements take the dispatch from the array-method lowering. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
15 lines
657 B
TypeScript
15 lines
657 B
TypeScript
// Methods on arrays of unknown elements, which are stored checked-dynamic:
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// direct `unknown[]` bindings and generic bodies instantiated at `unknown`.
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const values: unknown[] = [1, "two", 3, { four: 4 }];
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const removed = values.splice(1, 2);
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console.log(values, removed, removed.length);
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values.splice(1, 0, "inserted", null);
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console.log(values, values.indexOf(null), values.includes("inserted"));
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console.log(values.slice(1).reverse(), values.join("|"));
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function takeAt<T>(items: readonly T[], index: number): T[] {
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const pool = [...items];
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return pool.splice(index, 1);
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}
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console.log(takeAt([10, 20, 30], 1), takeAt<unknown>([true, "x", 7], 2));
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