mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-02 08:35:07 +08:00
Chris Tate
26b68b33d3
- Compile Unicode code-point construction, scalar iterable inputs, and primitive Buffer predicates without a JavaScript engine. - Preserve object identity and property additions or deletions in inferred JavaScript locals. - Recover nullable class fields initialized through static factories in bundled packages.
23 lines
1.3 KiB
TypeScript
23 lines
1.3 KiB
TypeScript
const text = String.fromCodePoint(0, 65, 0x7ff, 0x800, 0xffff, 0x10000, 0x1f4a1, 0x10ffff);
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console.log(Buffer.from(text).toString("hex"), text.length);
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console.log(String.fromCodePoint() === "", String.fromCodePoint(-0).charCodeAt(0));
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console.log(String.fromCodePoint(...[65, 0x1f4a1, 90]));
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console.log(String.fromCodePoint(...new Uint32Array([0x3bb, 0x1f4a1])));
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console.log(String.fromCodePoint(...new Float64Array([65, 66])));
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// UTF-8 output replaces lone surrogates; adjacent surrogate inputs combine.
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console.log(String.fromCodePoint(0xd83d, 0xdca1), String.fromCodePoint(0xd800, 65, 0xdc00));
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for (const point of [-1, 1.5, NaN, Infinity, -Infinity, 0x110000]) {
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try { String.fromCodePoint(65, point); }
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catch (e) { if (e instanceof Error) console.log(e.name, e.message); }
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}
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try { String.fromCodePoint(...new Float32Array([65, 1.5])); }
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catch (e) { if (e instanceof Error) console.log(e.name, e.message); }
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const sparse: number[] = [];
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sparse.length = 2;
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try { String.fromCodePoint(...sparse); }
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catch (e) { if (e instanceof Error) console.log("sparse", e.name, e.message); }
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let order = "";
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function point(value: number): number { order += value.toString() + ";"; return value; }
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try { String.fromCodePoint(point(-1), point(65)); }
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catch (e) { if (e instanceof Error) console.log(order, e.name, e.message); }
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