Method Calls

Ghost is deeply object oriented, so most code consists of invoking methods on objects, usually something like this:

dog.speak("Throw the ball!")

You have a receiver expression (here dog) followed by a ., then a name (speak) and an argument list in parentheses (("Throw the ball!")). Multiple arguments are separated by commas:

dog.command("fetch", "ball")

The argument list can also be empty:

dog.sit()

Ghost executes a method call like so:

1. Evaluate the receiver and arguments from left to right.
2. Look up the method on the receiver's object.
3. Invoke it, passing in the argument values.