Exception chaining and collectException

[Nemanja Boric via Digitalmars-d]

On Friday, 18 August 2017 at 22:51:35 UTC, Walter Bright wrote:
> On 8/18/2017 5:07 AM, Steven Schveighoffer wrote:
>> If we are to remove them, what happens when exceptions would 
>> normally chain?
>
> In C++, throwing an exception while unwinding is a fatal error.
>

Well, you still can throw it, but you're not allowed to let it 
escape the destructor (you need to catch them before they would 
chain).

C++ also provides a way to inspect if you're in the middle of the 
stack unwinding caused by an exception, to make this a bit more 
controllable, and I would think we should provide the similar 
primitive: 
http://en.cppreference.com/w/cpp/error/uncaught_exception.