Can we construct the following function signature:
foo<T>(bar: ConstructorOf<T>): T
in a way that allows this code snippet to be valid:
class Baz {}
foo(Baz); // type parameter T inferred as Baz
?
Can we construct the following function signature:
foo<T>(bar: ConstructorOf<T>): T
in a way that allows this code snippet to be valid:
class Baz {}
foo(Baz); // type parameter T inferred as Baz
?
Are you searching for something like this?
class Baz {
isBaz = true;
}
function foo<T>(c : {new(): T;}): T {
return new c;
}
console.log(foo(Baz).isBaz); // works fine
console.log(foo(String).length); // works fine
// console.log(foo(String).isBaz); // error: property isBaz does not exist in type String
This snippet is a simplified illustration from the final topic discussed in https://www.typescriptlang.org/docs/handbook/generics.html.
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