如何继承 TypeScript 中的默认泛型类型？

Question

Does TypeScript have the null type that inherits the default generic types?

Example:

type Foo<T = number, U = string> = { t: T, u: U }
type Bar = Foo<?, boolean> // Should be Foo<number, boolean>, but cannot input 'number'

Answer 1

As far as i know this is not possible right now. This might be something that could be covered by partial type argument inference in the future.