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=== tests/cases/compiler/strictNullNotNullIndexTypeShouldWork.ts ===
interface A {
params?: { name: string; };
>params : { name: string; } | undefined
>name : string
}
class Test<T extends A> {
>Test : Test<T>
attrs: Readonly<T>;
>attrs : Readonly<T>
m() {
>m : () => void
this.attrs.params!.name;
>this.attrs.params!.name : string
>this.attrs.params! : NonNullable<T["params"]>
>this.attrs.params : T["params"] | undefined
>this.attrs : Readonly<T>
>this : this
>attrs : Readonly<T>
>params : T["params"] | undefined
>name : string
}
}
interface Foo {
foo?: number;
>foo : number | undefined
}
class FooClass<P extends Foo = Foo> {
>FooClass : FooClass<P>
properties: Readonly<P>;
>properties : Readonly<P>
foo(): number {
>foo : () => number
const { foo = 42 } = this.properties;
>foo : number
>42 : 42
>this.properties : Readonly<P>
>this : this
>properties : Readonly<P>
return foo;
>foo : number
}
}
class Test2<T extends A> {
>Test2 : Test2<T>
attrs: Readonly<T>;
>attrs : Readonly<T>
m() {
>m : () => NonNullable<T["params"]>
return this.attrs.params!; // Return type should maintain relationship with `T` after being not-null-asserted, ideally
>this.attrs.params! : NonNullable<T["params"]>
>this.attrs.params : T["params"] | undefined
>this.attrs : Readonly<T>
>this : this
>attrs : Readonly<T>
>params : T["params"] | undefined
}
}
|
