b365e657d4
* Add unmeasurable variance kind for marking types whose variance result is unreliable
* Remove now-unneeded nongeneric checks
* Add rule allowing `Readonly<any>` to be `any` instead of `{readonly [index: string]: any}`
* All Unmeasurable variances to still shortcut structural comparisons in some cases
* Separate unmeasurable from unreliable to reduce the impact of this change, for now
* Fix lint
* Remove Readonly<any> -> any callout
* Add fix for circularity error triggered by deep signature return type comparisons with `this` types
22 lines
756 B
TypeScript
22 lines
756 B
TypeScript
const a: Required<{ a?: 1; x: 1 }> = { a: 1, x: 1 };
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const b: Required<{ b?: 1; x: 1 }> = { b: 1, x: 1 };
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export let A = a;
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export let B = b;
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A = b; // Should Error
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B = a; // Should Error
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a.b; // Property 'b' does not exist on type 'Required<{ a?: 1; x: 1; }>'.
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b.a; // Property 'a' does not exist on type 'Required<{ b?: 1; x: 1; }>'.
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interface Foo<T> {
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a: Required<T>;
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}
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const aa: Foo<{ a?: 1; x: 1 }> = { a: { a: 1, x: 1 } };
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const bb: Foo<{ b?: 1; x: 1 }> = { a: { b: 1, x: 1 } };
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export let AA = aa;
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export let BB = bb;
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AA = bb; // Should Error
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BB = aa; // Should Error
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aa.a.b; // Property 'b' does not exist on type 'Required<{ a?: 1; x: 1; }>'.
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bb.a.a; // Property 'a' does not exist on type 'Required<{ b?: 1; x: 1; }>'.
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