What is "Override"?

[GfKParticipant]

I see this quite a lot in sample code (in method declarations), but it isn’t mentioned anywhere in the documentation.

What does it mean?

[DaniloParticipant]

‘Override’ replaces a ‘Virtual’ method by a new method.

Class X has a virtual method doSomething().
Class Y inherits/extends class X.
Class Y would like to change the method doSomething(),
so it overrides it. When calling Y.doSomething(),
the overriden/replaced method is executed.

Without the keyword ‘Override’ you could replace a
method by accident, just by using the same method
fingerprint (method name + parameters).
To avoid such accidents, you have to explicitely
use ‘Override’ to make sure it is really what you want
to do.

Search for “OOP override”: https://en.wikipedia.org/wiki/Method_overriding

[Mark SiblyKeymaster]

Ugh, docs don’t even mention methods – will fix NOW!

But as Danilo says, it’s basically indicates you’re ‘changing’ the behaviour of a method in a super class (which is usually declared ‘Virtual’, indicating it can be overridden).

This is actually the default behavior in blitzmax/monkey, where all methods are virtual/override by default. In monkey2 you must explictly declare which methods can be overriden by subclass methods (with ‘Virtual’), and which methods are overriding superclass methods (with ‘Override’).

[GfKParticipant]

Ok that makes sense.  Thanks for the info.

 

As an aside, is there any documentation I can read to familiarise myself with monkey2, without asking a ton of noob questions?

[Mark SiblyKeymaster]

There’s just the ‘docs’ and what’s here in the forums. But don’t be afraid to ask noob Qs, they’re usually quick and easy to answer and will help others out.

[abakoboParticipant]

I started to work on the docs to add some missing think. There’s a keyword index where you would have had a brief answer to the question. It is in total WIP but contains all the official infos + some I added.

http://turdus.be/monkey2docs/docs/

note that you can call the super method in you override with the Super keyword so you don’t have to rewrite all the super methods code.

Monkey

[crayon-5cb9c9703dbed493550990 inline="true" ] Super.theMethodName

1 2 3

[crayon-5cb9c9703dbed493550990 inline="true" ] Super.theMethodName

[/crayon]

there’s also the Pakz exmples that are great to start with https://github.com/Pakz001/Monkey2examples

[Author]

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