63 lines
1.8 KiB
TypeScript
63 lines
1.8 KiB
TypeScript
// @strict: true
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function f<T>(p: Partial<T>, r: Readonly<T>, pr: Partial<Readonly<T>>, rp: Readonly<Partial<T>>) {
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let a1: Partial<T> = p;
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let a2: Partial<T> = r;
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let a3: Partial<T> = pr;
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let a4: Partial<T> = rp;
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let b1: Readonly<T> = p; // Error
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let b2: Readonly<T> = r;
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let b3: Readonly<T> = pr; // Error
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let b4: Readonly<T> = rp; // Error
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let c1: Partial<Readonly<T>> = p;
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let c2: Partial<Readonly<T>> = r;
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let c3: Partial<Readonly<T>> = pr;
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let c4: Partial<Readonly<T>> = rp;
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let d1: Readonly<Partial<T>> = p;
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let d2: Readonly<Partial<T>> = r;
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let d3: Readonly<Partial<T>> = pr;
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let d4: Readonly<Partial<T>> = rp;
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}
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// Repro from #17682
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type State = {
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[key: string]: string | boolean | number | null;
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};
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type Args1<T extends State> = {
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readonly previous: Readonly<Partial<T>>;
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readonly current: Readonly<Partial<T>>;
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};
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type Args2<T extends State> = {
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readonly previous: Partial<Readonly<T>>;
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readonly current: Partial<Readonly<T>>;
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};
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function doit<T extends State>() {
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let previous: Partial<T> = Object.create(null);
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let current: Partial<T> = Object.create(null);
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let args1: Args1<T> = { previous, current };
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let args2: Args2<T> = { previous, current };
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}
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type State2 = { foo: number, bar: string };
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type Args3 = {
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readonly previous: Readonly<Partial<State2>>;
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readonly current: Readonly<Partial<State2>>;
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};
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type Args4 = {
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readonly previous: Partial<Readonly<State2>>;
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readonly current: Partial<Readonly<State2>>;
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};
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function doit2() {
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let previous: Partial<State2> = Object.create(null);
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let current: Partial<State2> = Object.create(null);
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let args1: Args3 = { previous, current };
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let args2: Args4 = { previous, current };
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}
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