Microsoft/TypeScript
Nested generic calls don't inherit outer inferences when their return types are intersections containing functions
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#58.833 geöffnet am 12.06.2024
Domain: IntersectionHelp WantedPossible Improvement
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Beschreibung
🔎 Search Terms
generic call inference intersection return type
🕗 Version & Regression Information
- This is the behavior in every version I tried
⏯ Playground Link
💻 Code
interface Config<T> {
context: T;
invoke: {
(x: T): void;
exec: (x: T) => void;
};
}
declare function create<T>(config: Config<T>): void;
declare function myInvokeBroken<T>(i: { exec: (x: T) => void }): {
(x: T): void;
} & typeof i;
create({
context: { count: 3 },
invoke: myInvokeBroken({
exec: (x) => {
x
// ^?
x.count.toFixed(2);
},
}),
});
declare function myInvoke<T>(i: { exec: (x: T) => void }): {
(x: T): void;
exec: (x: T) => void;
};
create({
context: { count: 3 },
invoke: myInvoke({
exec: (x) => {
x
// ^?
x.count.toFixed(2);
},
}),
});
🙁 Actual behavior
x doesn't get contextually typed based on the outer inferences in the myInvokeBroken example
🙂 Expected behavior
I would expect myInvokeBroken and myInvoke to work here in the same way. Their return types are the same. It's only that myInvokeBroken is using an intersection in its return type while myInvoke isn't
Additional information about the issue
No response