Detecting exception unwinding

[Ola Fosheim Grøstad via Digitalmars-d-learn]

On Friday, 5 February 2016 at 07:31:24 UTC, cy wrote:
> I think you might be talking about two very different concepts 
> here. Unwinding only happens within the context of a certain 
> scope.

The object itself is the scope (RAII). If you can test for 
"uncaught_exceptions" you can implement the equivalent of 
scope(failure/success) etc within destructors.

So you basically should be able to do:

{
    Database db ...;

    for(...){
      db.Transaction t = db.new_transaction(....)


      // transaction t is closed here by destructor
      // but should not commit if exception is unwinding
    }

   // db is closed here but should log different information for 
exceptions
}