Variable-length stack allocated arrays

[grauzone]

bearophile wrote:
> void bar(int n) {
>   scope int[] a = new int[n]; // stack-allocated
>   foo(a);
> }

Why are you making such proposals, when one of the core developers even 
thought about removing normal "scope"? It's almost 100% guaranteed that 
nobody will listen.

I personally find it a good idea to find new ways to reduce producing 
memory garbage. The D GC is slow and bad, so you'd better avoid it.

Let's make this claim: it is impossible to write high performance 
applications (that need to make use of dynamic memory allocation) in D 
without resorting to "unsafe" techniques. That would include allocating 
memory on the stack, or manually freeing memory.

Maybe D should have focused more on safe and efficient memory managment 
concepts, like they can be found in languages like Cyclone (though I 
don't know how useful/feasible this is, but it sounded promising).