Most of the implementation of classes has been done. Feel free to give
it a try. You might run into something that is still a todo item, or a
bug. Please report this in a reproducible way.
This is a good moment to evaluate the current choices. Although the
syntax and semantics are similar to popular languages, there are also
some differences. Hopefully they are easy to understand.
One thing that I had to make a choice for is how to deal with limiting
access, especially to object members. Different languages have
different ways of doing this. And very different granularity,
especially when it comes to access by parent or child classes.
Currently I decided to keep it relatively simple and only provide three
ways:
- public: read and write access, using the "public" keyword
- default: read access only, no keyword used
- private: name prefixed with an underscore
Within the inheritance tree there are no limits, a child class can
access all members of a parent class and vice versa. There is no
"protected".
Making the read-only access the default has two reasons.
First of all, it is the most useful and recommended way to declare
object members. It avoids having to define "getters" while disallowing
anybody changing the values.
Secondly, using "public" and "private" keywords is very common, but
there is no widely used keyword for read-only.
One thing could still be changed: Instead of using the underscore prefix
to indicate "private" we could use the "private" keyword. Both are used
by popular languages. Although using "private" is more common, more
recently developed languages use the underscore prefix. Thus I would say
both are acceptable choices.
# currently:
this._member
# alternatively:
private this.member
The main advantage of using the underscore prefix is that the "private"
property can also be seen where the member is used. The main
disadvantage is that it's a bit obscure for those users who haven't seen
this syntax used this way before.
Opinions?
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