constructSignatureAssignabilityInInheritance5.ts(4,14): error TS2564: Property 'foo' has no initializer and is not definitely assigned in the constructor.
constructSignatureAssignabilityInInheritance5.ts(5,30): error TS2564: Property 'bar' has no initializer and is not definitely assigned in the constructor.
constructSignatureAssignabilityInInheritance5.ts(6,34): error TS2564: Property 'baz' has no initializer and is not definitely assigned in the constructor.
constructSignatureAssignabilityInInheritance5.ts(7,35): error TS2564: Property 'bing' has no initializer and is not definitely assigned in the constructor.


==== constructSignatureAssignabilityInInheritance5.ts (4 errors) ====
    // checking subtype relations for function types as it relates to contextual signature instantiation
    // same as subtypingWithConstructSignatures2 just with an extra level of indirection in the inheritance chain
    
    class Base { foo: string; }
                 ~~~
!!! error TS2564: Property 'foo' has no initializer and is not definitely assigned in the constructor.
    class Derived extends Base { bar: string; }
                                 ~~~
!!! error TS2564: Property 'bar' has no initializer and is not definitely assigned in the constructor.
    class Derived2 extends Derived { baz: string; }
                                     ~~~
!!! error TS2564: Property 'baz' has no initializer and is not definitely assigned in the constructor.
    class OtherDerived extends Base { bing: string; }
                                      ~~~~
!!! error TS2564: Property 'bing' has no initializer and is not definitely assigned in the constructor.
    
    interface A { // T
        // M's
        a: new (x: number) => number[];
        a2: new (x: number) => string[];
        a3: new (x: number) => void;
        a4: new (x: string, y: number) => string;
        a5: new (x: (arg: string) => number) => string;
        a6: new (x: (arg: Base) => Derived) => Base;
        a7: new (x: (arg: Base) => Derived) => (r: Base) => Derived;
        a8: new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
        a9: new (x: (arg: Base) => Derived, y: (arg2: Base) => Derived) => (r: Base) => Derived;
        a10: new (...x: Derived[]) => Derived;
        a11: new (x: { foo: string }, y: { foo: string; bar: string }) => Base;
        a12: new (x: Array<Base>, y: Array<Derived2>) => Array<Derived>;
        a13: new (x: Array<Base>, y: Array<Derived>) => Array<Derived>;
        a14: new (x: { a: string; b: number }) => Object;
    }
    
    interface B extends A {
        a: new <T>(x: T) => T[];
    }
    
    // S's
    interface I extends B {
        // N's
        a: new <T>(x: T) => T[]; // ok, instantiation of N is a subtype of M, T is number
        a2: new <T>(x: T) => string[]; // ok
        a3: new <T>(x: T) => T; // ok since Base returns void
        a4: new <T, U>(x: T, y: U) => T; // ok, instantiation of N is a subtype of M, T is string, U is number
        a5: new <T, U>(x: (arg: T) => U) => T; // ok, U is in a parameter position so inferences can be made
        a6: new <T extends Base, U extends Derived>(x: (arg: T) => U) => T; // ok, same as a5 but with object type hierarchy
        a7: new <T extends Base, U extends Derived>(x: (arg: T) => U) => (r: T) => U; // ok
        a8: new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: T) => U) => (r: T) => U; // ok
        a9: new <T extends Base, U extends Derived>(x: (arg: T) => U, y: (arg2: { foo: string; bing: number }) => U) => (r: T) => U; // ok, same as a8 with compatible object literal
        a10: new <T extends Derived>(...x: T[]) => T; // ok
        a11: new <T extends Base>(x: T, y: T) => T; // ok
        a12: new <T extends Array<Base>>(x: Array<Base>, y: T) => Array<Derived>; // ok, less specific parameter type
        a13: new <T extends Array<Derived>>(x: Array<Base>, y: T) => T; // ok, T = Array<Derived>, satisfies constraint, contextual signature instantiation succeeds
        a14: new <T, U>(x: { a: T; b: U }) => T; // ok
    }