I think this proposal should be merged with Johannes' one.
On 04/06/2012 11:41 AM, Johannes Pfau wrote:
Declaring a custom attribute: --------- module std.something; struct Author { string name; public this(string name) { this.name = name; } } --------- Using it: --------- import std.something; //Usual namespace lookup rules apply to attributes /* * @Author(param) calls the constructor of the Author struct and * attaches the struct instance to test. Probably @Author (without * parenthesis) coud be made to mean std.something.Author.init */ @Author("Johannes Pfau") int test; --------- Attaching attributes multiple times as in C# should be possible. Using reflection to get that attribute: --------- if(__traits(hasAttribute, test, std.something.Author)) { Author[] authors = __traits(getAttribute, test, std.something.Author); } --------- An array is used here to support attaching the same attribute multiple times. Of course "auto authors = ..." should be usable here too.