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Chris Tate
31332427b6
- Preserve fresh constructor identity and shared captures across local class instances. - Carry constructors through unknown values without a JavaScript engine. - Support runtime-length spreads into fixed and rest parameters.
19 lines
592 B
TypeScript
19 lines
592 B
TypeScript
function makeCounter(start: number) {
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let value = start;
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const Local = class Counter {
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read(): number { return value; }
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increment(): number { return ++value; }
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callback = (): number => value;
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};
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value++;
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return Local;
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}
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const First = makeCounter(10);
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const Second = makeCounter(20);
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const a = new First();
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const b = new First();
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const c = new Second();
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console.log(First.name, First === First, First === Second);
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console.log(a.read(), b.increment(), a.callback(), c.read());
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console.log(a instanceof First, a instanceof Second, c instanceof First, c instanceof Second);
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