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
19 lines
397 B
TypeScript
19 lines
397 B
TypeScript
// @strict: true
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class A<T> {
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unmeasurableUsage!: {[K in keyof T]-?: T[K]};
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}
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class B<T> extends A<T> {
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method(): string | (this extends C ? undefined : null) {
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return "";
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}
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}
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class C<T = any> extends B<T> {
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marker!: string;
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}
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const x = new C<{}>();
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const y = x.method(); // usage flags `method` in `B` as circular and marks `y` as the error-any type
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