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https://github.com/vercel-labs/scriptc.git
synced 2026-11-08 08:44:37 +08:00
Chris Tateandejc3
b237cf1ff0
An element write whose index the checker types as a number but whose storage may hold undefined (a for...of variable over an array that may have holes) converted the index with ToNumber only on plain-array writes. Typed-array writes, compound and update writes, element assignments used as values and element targets in destructuring assignment now convert it the same way, as the element reads already do, instead of refusing it as a non-number key. Fixes #1622 Co-authored-by: ejc3 <1694850+ejc3@users.noreply.github.com>
36 lines
1.1 KiB
TypeScript
36 lines
1.1 KiB
TypeScript
// Element writes whose index comes from for...of over a number[] field the
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// class also writes by index (so the loop variable's storage may be
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// undefined, a hole read): typed-array writes, compound and update writes,
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// a write used as a value, and a destructuring target all convert the
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// index with ToNumber, as the element reads do.
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class Heap {
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private k: number[] = [];
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push(v: number): void {
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const i = this.k.length;
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this.k.push(v);
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this.k[i] = v;
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}
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all(): number[] {
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return this.k;
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}
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}
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const h = new Heap();
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h.push(2);
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h.push(0);
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h.push(1);
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const cost = new Float64Array(4);
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for (const i of h.all()) cost[i] = i * 1.5;
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console.log(Array.from(cost).join(","));
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const counts = new Int32Array(3);
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for (const i of h.all()) counts[i] += 10;
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for (const i of h.all()) counts[i]++;
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console.log(Array.from(counts).join(","));
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const marks = new Uint8Array(3);
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let last = 0;
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for (const i of h.all()) last = marks[i] = i + 1;
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console.log(Array.from(marks).join(","), last);
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const plain = [0, 0, 0];
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for (const i of h.all()) [plain[i]] = [i * 2];
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for (const i of h.all()) plain[i] += 1;
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console.log(plain.join(","));
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