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https://github.com/vercel-labs/scriptc.git
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Chris Tate
94fd361b54
Represent ordinary JavaScript arrays with hole, value, and explicit-undefined states; add sparse side storage and carry missing values through the frontend, native backends, runtime, and Node-facing consumers.
13 lines
653 B
TypeScript
13 lines
653 B
TypeScript
// The fences around optional fields. Optional fields themselves compile —
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// record fields AND class fields (undefined-armed union slots; corpus 967
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// and 2047) — and `{a: string}` values COERCE into `{a?: string}` slots
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// (the width-copy field lift). The string | undefined root compiles now
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// (corpus 2788); number | undefined remains a BARE undefined-armed union
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// with no root stringify lowering. Record FIELDS get Node's drop treatment;
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// the CAST direction compiles — the checked-dynamic tree holds first-class undefined.
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function mkMaybe(): number | undefined {
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return undefined;
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}
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const stringifyBare = JSON.stringify(mkMaybe());
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