Bug: Accessing protected members from a static function in a derived class is declined.

[0815fox]

TypeScript Version: 2.0.3

class C1 {
    protected foo() {};
    static generateFor(x:C1) {
        const RetVal = new C1();
        RetVal.foo(); //Compiler allows access of protected member from static method in the class itself
        return RetVal;
    }
}

class C2 extends C1 {
    static generateFor(x:C2) {
        const RetVal = new C1();
        RetVal.foo(); //Compiler disallows access of protected member from static method in child class
        //error TS2446: Property 'foo' is protected and only accessible through an instance of class 'C2'.
        return RetVal;
    }
}

Expected behavior: A static function in a class extending a class C can access all protected and public, but not private members of instances of C

Actual behavior: Protected members are not accessible,Compiler throws TS2446

For reference the simple case without inheritance, which works as expected:

• A static function in a class C can access all private,protected and public members of instances of C (works as expected)

[RyanCavanaugh]

Why would a static method be allowed to do something an instance method can't? See also #11278, #10637, #8512

[0815fox]

Why would a static method be allowed to do something an instance method can't? See also #11278, #10637, #8512
Instance methods can access protected members of the base class. That's the purpose of protected.

[RyanCavanaugh]

Please see the linked issues.

[0815fox]

Okay, I see the point in #8512. I will discuss on there.

[aluanhaddad]

Just thinking out loud here but if ECMAScript ever introduces nested, instance member classes, we could end up with something interesting like Scala's path-dependent types.

[aluanhaddad]

Actually I suppose we already have that with class expressions. As much as I think classes are over used there is something really interesting about combining classes and closures...