Re: Static class question

[anonymous]

On Thursday, 14 February 2013 at 12:49:01 UTC, Lubos Pintes wrote:

Hi,
I saw one ListBox class implementation.

As we all know, ListBox class collects and displays strings. Author decided that he encapsulate the Object as item, and uses its toString() method when string is needed for display. For cases when string is added, he defined this small class, internal to ListBox:

[code]
        private static class StringItem
        {
                private string _str;

                public this(string s)
                {
                        this._str = s;
                }

                public override string toString()
                {
                        return this._str;
                }
        }
[/code]

After I read about attributes on dlang, I think the static could be removed from above definition. Is this true?

Thank

Without 'static', StringItem objects would be tied to ListBox
objects. 'static' saves StringItem objects some bytes, and
ensures that StringItem is independent of ListBox.
See http://dlang.org/class.html#nested