Value closures (no GC allocation)

[Adam D. Ruppe via Digitalmars-d]

On Sunday, 21 May 2017 at 00:33:30 UTC, Vittorio Romeo wrote:
>     auto bar(T)(T x) @nogc

Make that `scope T x` and it will compile, using stack 
allocation. Only worry is that you must not escape a reference to 
the delegate; you are only allowed to use it in that function's 
scope.

> What are your thoughts? Has something similar been proposed 
> before?

It has, and I actually don't hate it, but I also don't think it 
is necessary because of the `scope` storage class being one 
option and just manually writing out the struct functor being 
another viable one. The c++ syntax sugar is nice, but I can live 
without it.