User Defined Attributes

[Jacob Carlborg]

On 2012-11-08 00:43, Adam D. Ruppe wrote:

> One of the previous threads put forth something like this:
>
> template MyAttribute(alias subject, T... arguments) { /* some
> implementation */
>
> The attribute is a template that replaces the declaration. So you type:
>
> [MyAttribute("foo")]
> class Something {}
>
>
> And the compiler rewrites that to:
>
> class __anonymous_Something {}
>
> alias Something = MyAttribute!(__anonymous_Something, "foo");
>
>
>
> ... or something like that. I'm going off memory here. But then you can
> use the template to do whatever you'd normally do with a template.
>
> For some reason this feels incomplete to me. I know one of those
> proposals enabled something we can't really do now, whereas what I
> described here of course *can* be done now.

Seems like a poor man's replacement for macro annotations:

http://scalamacros.org/future.html

-- 
/Jacob Carlborg