inner functions instead of scope

[Marc Schütz via Digitalmars-d]

On Tuesday, 24 May 2016 at 02:01:14 UTC, cy wrote:
> void transaction(Callable)(Callable do_stuff)
                              ^^^^^^^^
                              `scope` to avoid GC
> if(isCallable(Callable)) {
>   begin();
>   scope(failure) rollback();
>   scope(success) commit();
>   do_stuff();
> }
>
> ...
>
> transaction({
>   big_long_complicated_code_block();
> });

This technique is very widely used in Ruby, and I agree that it's 
really useful. It would be even nicer if we had trailing 
delegates, as Jacob Carlborg suggested [1]:

db.transaction {
   // ...
}

[1] http://forum.dlang.org/post/modnbn$184o$1@digitalmars.com