On 2013-02-08 23:53:30 +0000, Robert <jfanati...@gmx.at> said:

Ok. Here finally it is:

http://wiki.dlang.org/DIP26

This is pretty much exactly how I think properties should work. There's two possible benefits you may to have overlooked…

One benefit of the "@property T foo;" syntax that does the boilerplate code for you over using a plain variable: the getter and setter generated are virtual in a class, so a derived class can override them. Doesn't work with a plain variable.

Another possible benefit that we could have is the ability to use the default getter but to provide your own setter implementation by just declaring it:

        @property int a;
        @property void a(int value) { __a = value; refresh(); }

Much cleaner than this:

        private int _a;
        @property int a() { return _a; }
        @property void a(int value) { _a = value; refresh(); }

It's really great to not have to write boilerplate functions when default behaviour is perfectly fine. I've been using Objective-C for a while now and the recent changes where it automatically synthesize a variable, a getter, and a setter when declaring a property (unless you provide your own) are truly delightful.

--
Michel Fortin
michel.for...@michelf.ca
http://michelf.ca/

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