Static and runtime types: Correct Solution

Given the following type declarations:

public class Ugtial {
    public Ugtial meseo(Ugtial ic) {
        return new Tarncel();
    }
}

public class Aned extends Ugtial {
    public Ugtial meseo(Ugtial ic) {
        return ic;
    }
}

public class Tarncel extends Ugtial {
    public Ugtial meseo(Ugtial ic) {
        return this;
    }
}

...and given the following setup code:

Ugtial foo = new Tarncel();
Ugtial bar = new Aned();

Part 1

Draw an AST for the following expression, labeling the static type (a.k.a. compile-time type) of each node in the tree:

foo.meseo(bar).meseo(bar)

(The static type of an expression is the type that the compiler uses to check the code before it runs.)

Solution

Part 2

Draw an AST for the same expression, this time labeling the runtime type of each node in the tree.

(The runtime type of an expression is the type of the actual value that appears when the code runs.)

Solution

Related puzzles:

• Static and runtime types: Correct Solution (wtux-x8Lm-riqd-6ab0)
• Static and runtime types: Correct Solution (wtac-4w80-myr6-46z9)