On 04/06/2012 11:41 AM, Johannes Pfau wrote:
Syntax in D would be different of course, but I see absolutely no need
for the redundant (and ugly) @attr.
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.
This all seems very reasonable. I think this is how things should work.
(maybe syntax will need to be different, because Walter does not seem to
like the idea of un-reserving @identifier.)
