On 21.06.2013 14:41, Adam D. Ruppe wrote:
OMG guys this finishes the druntime extension problem!
Try it yourself, open up dmd2/src/druntime/import/object.di and find
template RTInfo.
Change it to this:
template RTInfo(T)
{
static if(__traits(compiles, { import druntime.extensions; auto a
= druntime.extensions. RTInfo!T; })) {
import druntime.extensions;
enum RTInfo = druntime.extensions.RTInfo!T;
} else
enum RTInfo = cast(void*)0x12345678;
}
I guess you should move the "static if" outside of the template to avoid
having it evaluated for every type. This can be pretty expensive as it
includes a file search every time if it fails.
It triggered! Boom, we have the potential for *project-wide*
modifications to RTInfo without modifying druntime. Combine this with
the other techniques I've talked about for rtinfo and we have it all.
You wouldn't necessarily have to add it specifically to the command line
btw, you could put it in a file called druntime/extensions.d in your
import directory as well, especially since it is a template.
I was considering something similar, maybe this could even be extended
to allow combining multiple extensions to work side-by-side.
I'm unsure though if this is too brittle with respect to linking
something together that might be compiled with or without these extensions.
