I want to constrain my generic Foo class to accept only certain types.
Also, I need to auto-derive the type by the default value that is passed to the constructor of Foo.

With just Foo<T>, when I call new Foo("bar") the type is Foo<string>. That is what I want.

However, when I try to restrict type T as seen below, when I call new Foo("bar") the type is Foo<"bar">. Is there a way to make the compiler to still derive string?

  type FieldTypes = string | number | boolean | Date | null;

  class Foo<T extends FieldTypes> {
    private value: T;
    constructor(defaultValue: T) {
      this.value = defaultValue;
    }
  }
  
  const foo: Foo<"bar"> = new Foo("bar"); // this should be of type Foo<string>