35 lines
676 B
TypeScript
35 lines
676 B
TypeScript
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// @strictNullChecks: true
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// @noLib: true
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type Readonly<T> = {readonly [K in keyof T]: T[K]}
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interface A {
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params?: { name: string; };
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}
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class Test<T extends A> {
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attrs: Readonly<T>;
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m() {
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this.attrs.params!.name;
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}
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}
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interface Foo {
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foo?: number;
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}
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class FooClass<P extends Foo = Foo> {
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properties: Readonly<P>;
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foo(): number {
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const { foo = 42 } = this.properties;
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return foo;
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}
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}
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class Test2<T extends A> {
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attrs: Readonly<T>;
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m() {
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return this.attrs.params!; // Return type should maintain relationship with `T` after being not-null-asserted, ideally
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}
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}
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