Having read-only, public proprty of class is very useful. But I am not able to see if Maple supports this.
The idea is to have an object with public variable that can only be read from outside. But to change it, one must call a setter() method. The advantage of this over having a getter() method to read the variable back is that it simplifies the code and makes it easier to read.
There is good discussion here on this subject https://www.python-course.eu/python3_properties.php
and https://en.wikipedia.org/wiki/Property_(programming) :
"A property, in some object-oriented programming languages, is a special sort of class member, intermediate in functionality between a field (or data member) and a method. The syntax for reading and writing of properties is like for fields, but property reads and writes are (usually) translated to 'getter' and 'setter' method calls. The field-like syntax is easier to read and write than many method calls"
In Maple, if I make the variable inside the object an export then now one can not only read it, but also change it from outside. I want to allow only reading from outside. Here is an example
export name::string; #made it export to allow direct reading
o:-name := name;
And now one can do
o:-name; #read it
But one can also change it from outside by doing o:-name:="new name"; and this ofcurse breaks the whole idea of encapsulation.
I think allowing reading only of object variables is OK and many OO language allow this. They are called properties.
If the variable above is made local, then one can not read it directly, and a getter() method is needed for each object properties, in addition to setter() method.
Is it possible in Maple to make local object variables read only from outside? If not and if Maplesoft wants to improve its OO, this will be something useful to add for next version.