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=== tests/cases/compiler/optionalTupleElementsAndUndefined.ts ===
// Repro from #50753
type UnNullify<T> = { [K in keyof T]: NonNullable<T[K]> };
>UnNullify : UnNullify<T>
type Foo = UnNullify<[a: 1, b?: 2 | undefined]>;
>Foo : [a: 1, b?: 2 | undefined]
type Test = [a: 1, b?: 2] extends Foo ? true : false; // true
>Test : true
>true : true
>false : false
// Types in the following declarations should be identical
var v: [1, 2?];
>v : [1, (2 | undefined)?]
var v: [1, (2 | undefined)?];
>v : [1, (2 | undefined)?]
var v: [a: 1, b?: 2];
>v : [1, (2 | undefined)?]
var v: [a: 1, b?: 2 | undefined];
>v : [1, (2 | undefined)?]
var v: UnNullify<[1, 2?]>;
>v : [1, (2 | undefined)?]
var v: UnNullify<[1, (2 | undefined)?]>;
>v : [1, (2 | undefined)?]
var v: UnNullify<[a: 1, b?: 2]>;
>v : [1, (2 | undefined)?]
var v: UnNullify<[a: 1, b?: 2 | undefined]>;
>v : [1, (2 | undefined)?]
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