Proposal 2: Exceptions and @nogc

[via Digitalmars-d]

On Sunday, 9 April 2017 at 03:26:14 UTC, Walter Bright wrote:
> My previous version did not survive implementation. Here's the 
> revised version. I have submitted it as a DIP, and there's a 
> trial implementation up:
>
> [...]

Instead of adding new runtime helper functions like 
_d_newThrowable and _d_delThrowable, can we leverage the existing 
(though deprecated) support for class (de)allocators and 
essentially divide the _d_delThrowable implementation between the 
destructor and the deallocator member function? This will go hand 
in hand with the work that Lucia has been doing on making the 
runtime more generic and reducing the number of special cases in 
the compiler [1] [2] [3]. Obviously you have done the work 
already, but in theory at least, with my proposal users should be 
able to override the memory allocation method in derived 
exception classes, without any changes to druntime.

[1]: https://github.com/dlang/druntime/pull/1781
[2]: https://github.com/dlang/druntime/pull/1792
[3]: http://dconf.org/2017/talks/cojocaru.html