mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-20 05:40:17 +08:00
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.
20 lines
621 B
TypeScript
20 lines
621 B
TypeScript
/* Ask 4's inbound declared-integer edge: `take`'s parameter is
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* profile-declared i64 (takeU's u64), so the generated wrapper
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* range-checks every HOST call — a value past ±(2^53 − 1) cannot ride
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* f64 exactly, and silent rounding is a coercion the author never wrote,
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* so the wrapper delivers the SC4012 host-contract trap instead.
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* In-range values convert exactly. */
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let seen: number[] = [];
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export function take(x: number): void {
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seen.push(x);
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}
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export function takeU(x: number): void {
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seen.push(x);
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}
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export function last(): number {
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return seen.length === 0 ? -1 : seen[seen.length - 1]!;
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}
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