mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-21 05:50:55 +08:00
Chris Tate
6086bc1487
- Reuse integer values across local updates, branches, and numeric operations. - Preserve typed-array integer values through reads and writes. - Cover number semantics, evaluation order, and native emission boundaries.
36 lines
1.2 KiB
TypeScript
36 lines
1.2 KiB
TypeScript
function choose(seed: number, count: number): number {
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let value = seed;
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for (let i = 0; i < count; i++) {
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value = i % 2 === 0 ? Math.imul(value, 5) : value ^ 17;
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value = (value & 255) || (value >>> 1);
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value = (value | 1) && Math.imul(value, 3);
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}
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return value;
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}
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for (const seed of [-0, 0, 0.75, -3.75, NaN, Infinity, 4294967295]) {
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console.log(choose(seed, 0), 1 / choose(seed, 0), choose(seed, 9));
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}
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function lazy(input: number, flag: boolean): void {
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let value = input;
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let calls = 0;
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const touch = (): number => { calls++; return 7.5; };
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const result = flag ? value | 0 : touch();
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console.log(result, result >>> 0, calls);
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console.log((value | 0) || touch(), calls);
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console.log((value | 0) && touch(), calls);
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console.log(flag ? (value = -0) : (value = 4294967297), 1 / value, value >>> 0);
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}
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lazy(-0, true);
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lazy(-2.75, false);
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function nested(input: number, flag: boolean): void {
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for (let i = 0; i < 2; i++) {
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let value = input;
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console.log(value ^ (flag ? (value = 12.5) : (value = -0)), value, value >>> 0);
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console.log(Math.imul(value, flag ? (value = 3) : (value = 5)), value >>> 0);
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}
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}
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nested(1.5, true);
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nested(-3.5, false);
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