Phobos is now compiled with -preview=dip1000

[Olivier FAURE]

On Friday, 17 May 2019 at 20:04:42 UTC, Walter Bright wrote:
> Dip1000 is key to enable containers to control access to 
> pointers to their innards that they expose.

I haven't looked at the subject for a while, but every time I did 
the takeaway was the same: dip1000 works great for containers 
until you need to reallocate or free something, at which point 
it's back to @trusted code with you.

I think you said at some point "It's still useful, because it 
reduces the surface of code that needs to be checked", but even 
then saying containers can "control access to the data they 
expose" is a little optimistic.

They only control that access as long as you don't need to call 
resize(). I'd wager that a large fraction of dangling pointer 
errors made by non-beginner C++ developpers come specifically 
from this use case.