Re: Plan for Exceptions and @nogc?

[Dicebot via Digitalmars-d]

On Monday, 16 February 2015 at 23:17:03 UTC, Jonathan Marler 
wrote:
Is there a proposal for how D will support throwing Exceptions 
in @nogc code in the future?  I've searched the forums and 
found different proposals that involve things like 
pre-allocated exceptions, non-gc heap allocated exceptions or 
even stack allocated exceptions.  I don't want to debate the 
details of each solution, I'd just like to know if any of these 
proposals are deemed a "good idea", or if any of them are 
currently being worked on.  I personally think that using 
non-gc heap allocated exceptions in combination with the new 
scope semantics would be a great solution in many cases, but I 
don't know if there is any consensus or if this topic is just 
on the back-burner. Thanks.

From my POV best proposal from last lengthy discussion was to 
enable reference-counted non-gc-heap Exceptions. But that needs a 
language change because RefCounted!T is a struct and thus neither 
can be thrown nor can be part of Throwable class hierarchy.

Any concept that implies that exceptions an be deallocated in 
`catch` block is absolutely unacceptable because it conflicts 
with exception propagation from fibers - a very important piece 
of functionality.