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https://github.com/vercel-labs/scriptc.git
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Chris Tate
3af05d9fbc
- Complete frontend lowering with zero rejected statements, dynamic islands, or skipped functions. - Support contextual construction, presence guards, and union record copies used by the compiler. - Add native CommonJS resolution and cross-platform file URL handling while preserving Node host behavior.
12 lines
738 B
TypeScript
12 lines
738 B
TypeScript
type Payload = { tag: "number"; value: number } | { tag: "text"; value: string };
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type WiderPayload = { tag: "number"; value: number; extra: boolean } | { tag: "text"; value: string; extra: boolean };
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type Container = { kind: "left"; payload: Payload; left: number } | { kind: "right"; payload: Payload; right: number };
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function copy(source: Container, payload: WiderPayload): boolean {
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// Retagging the override into source.payload would discard extra and
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// copy its record. The inferred spread result keeps the wider payload.
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const result = { ...source, payload };
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return result.payload.extra;
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}
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console.log(copy({ kind: "left", payload: { tag: "number", value: 1 }, left: 2 }, { tag: "text", value: "kept", extra: true }));
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