On exceptions in D

[Jakob Ovrum]

On Sunday, 9 February 2014 at 20:32:54 UTC, Dmitry Olshansky 
wrote:
> Might be a good idea but compiler is pretty conservative with 
> what can be created at compile-time and emplace may not play 
> nice with CTFE.

I didn't intend to imply compile-time construction, just 
statically allocate `ubyte[__traits(classInstanceSize, Ex)]` and 
lazily emplace `Ex` there instead of GC-allocating with `new`. It 
would be doable with `std.typecons.Scoped` if that type wasn't 
naively anonymized a couple of releases ago.