On Thursday, 7 June 2018 at 12:32:26 UTC, Arafel wrote:
Thanks for all the answers!
Is it possible to register, say, a base class, and have all the
subclasses then registered automatically?
My idea would be to make it as transparent as possible for the
plugin implementation, and also not having to depend on it.
A.
I don't think so. It clearly states that children must mixin too,
which can mean it just grabs symbols in scope only, and base
class has no way of knowing about its subclasses. It also has
"agressive mode" that will make metadata for all public
symbols(?) it can walk, this may or may not be helpful depending
on your requirements.
Besides there is no way(not that I am aware of) to make self
registering stuff happen, you still need to call it somewhere.
The most transparent option is probably just doing a mixin in
each module that performs registration of all module symbols in
module ctor.
The point is that there is absolute requirement to make explicit
call for that, be it a module ctor mixin, class mixin or even
user provided registration both at compile time or run time.
But since it is MIT licensed you can probably use the code as the
starting point and adjust to your own needs.
BTW plug-ins is something that is right now possible on Linux(not
sure about support on other *NIX systems), but in a very
primitive form on Windows.
This is related to DLL support issues(such as type information
not being passed across process/DLL boundaries), these issues
also may include runtime issues as well such as inability to
delegate the GC, which will mean there will be 2(or more)
concurrent running GC's. But again I am not aware of the current
situation.
