Redundancy of DRuntime and Phobos

[Adam D. Ruppe]

On Friday, 21 May 2021 at 16:15:57 UTC, Q. Schroll wrote:
> I noticed that `core.internal.traits` contains a lot of stuff 
> that is exactly the same in `std.traits` and `std.meta`. Is 
> that for legacy reasons or should new additions be also 
> redundant (and why)?

As I understand it, they were added to Phobos first, then people 
wanted them in druntime, but druntime cannot import phobos, so it 
copy/pasted, but then the duplication was annoying, so phobos 
then imported druntime.



I think it is more an accident of history and maybe some 
compatibility worries more than anything else.

Or indeed it could be doc related. adrdox handles public imports 
pretty ok but ddoc doesn't.