Class implementation such that assignment x=MyObj does in fact x=MyObj.prop1

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Let's say I have a class
classdef TestClass < handle
properties
prop1 = 7
prop2
end
methods
function method1(obj)
fprintf('prop1 is %g.', obj.prop1);
end
end
end
Now, when I do
Obj = TestClass;
x = Obj;
I want that the value of property prop1 is assigned to x, instead of the reference to Obj. So this assignment results to x=7.
And I would prefer to keep the class to be inherited from handle. But value class will also do.
I still would like to access prop2 as Obj.prop2 and call all the methods.
How this can be implemented in a custom class?
Thanks!
  2 Comments
Oleg Iupikov
Oleg Iupikov on 4 Aug 2022
Edited: Oleg Iupikov on 4 Aug 2022
I meant a case like
s = "abc"; s1 = s; s1
s1 = "abc"
so it displays the original string. But now I see that I was wrong. Perhaps it just overloads disp, or does a similar trick :) I removed that part from the question to not confuse people.

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Accepted Answer

Matt J
Matt J on 4 Aug 2022
Edited: Matt J on 4 Aug 2022
You can't have precisely what you have asked for, but you can do this,
classdef TestClass < handle
properties
prop1 = 7
prop2
end
methods
function method1(obj)
fprintf('prop1 is %g.', obj.prop1);
end
function out=double(obj) %converter
out=double(obj.prop1);
end
function out=single(obj) %converter
out=single(obj.prop1);
end
end
end
and then,
>> Obj=TestClass
Obj =
TestClass with properties:
prop1: 7
prop2: []
>> x=zeros(1,3)
x =
0 0 0
>> x(3)=Obj
x =
0 0 7
  1 Comment
Oleg Iupikov
Oleg Iupikov on 4 Aug 2022
Unfortunatelly, for this we already need to have a variable of class double or single, and do an indexed assignment.
In any case, thanks for your time and answer!

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