On Tuesday, 2 June 2015 at 10:29:35 UTC, Daniel Kozak wrote:
I am working on dip which will try to addressed negation of
attributes issue.
http://wiki.dlang.org/DIP79
You need to iron out what happens with attributes like
@safe/@trusted/@system or public/protected/package/private.
Simply turning them on and off doesn't really work.
Regardless, I think that attribute(boolean expression) is the
clear winner, because it's for more flexible. Without the ability
to provide a boolean expression, some code will be forced to use
compile-time introspection to determine which attributes are
enabled and then enable or disable them as appropriate in
different static if branches. That sort of case is really only
going to pop up in generic code, but once you start turning
attributes on and off, I fully expect that it will come up, in
which case, a syntax such as !final won't work very well.
Also, Andrei has expressed interest in the attribute(boolean
expression) syntax in the past, so that syntax has at least some
support from him.
- Jonathan M Davis
