Proposal: user defined attributes

[Adam D. Ruppe]

On Wednesday, 21 March 2012 at 08:29:23 UTC, Tove wrote:
> With the mixin improvement proposal any arbitrarily complex 
> feature can be implemented in the library, appearing to enjoy 
> first class syntax with just 1 extra character penalty vs the 
> compiler.

My main concern with the library implementation isn't
syntax.

The big question is still: where will you put the
annotation data?