CODEWITHSUNDEEP
matlaboopinheritanceconstructor
It'sPete
It'sPete

Reputation: 5211

Calling MATLAB Superclass of a superclass constructor

I have the following problem. I have three classes: A, B, and C. A is the base class, B inherits A, and C inherits B.

Each has a constructor that takes in alot of arguments. However, the constructor for B does a few steps that I don't want in C that I can't undo unless I add more interface code, which would break encapsulation for a few variables. Namely, I'd give the user of my class the ability to change a few variables that I don't want them to.

As a result, I thought that I'd be clever and try to call the constructor of A from C. However MATLAB doesn't like this. See code below.

classdef C < B
  % properties go here
  % ...
  methods(Access = public)
    function obj = C(arguments)
      obj = obj@A(A's arguments);  % MATLAB doesn't like this
      % ...
    end
  end

So, how can I (or can I not), call the constructor to A?

Upvotes: 1

Views: 264

Answers (1)

DasKr&#252;melmonster
DasKr&#252;melmonster

Reputation: 6060

the constructor for B does a few steps that I don't want in C

In that case, your C is not an B. If the constructor from B is not executed in the construction process of C, then C cannot be a valid object of class B. However, the inheritance relationship implies this.

As such, the inheritance C < B is wrong. You should inherit C from A.

If you really want to, I'd try to implement a (mostly empty) protected constructor in B that is then called from C. Not entirely sure that works in Matlab though.

Upvotes: 2

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