D2 full closure?

[Walter Bright]

BCS wrote:
> Oh crud, I read it wrong.
> 
> OTOH that problem is even worse than the issue I was thinking of:
> 
> is this valid?

Yes.

> does it generate a different heap frame for each time 
> through the loop?

All that happens is the stack frame is put on the heap. It doesn't 
allocate new heap frames in a loop.

> 
> alias void delegate() Runner;
> 
> void main(){
>  Runner[] runner;
>  int i;
>  for(i = 0; i < 3; i++ ){
>    const int ci = i;
>    runners ~= delegate(){ writefln( "run with ci=%d, i=%d", ci, i ); }
>  }
>  foreach( runner; runners ){
>    runner();
>  }
> }
> 
> 
> is this valid?

Yes.

> 
> void main()
> {
>  Runner a;
>  {
>      int i = 5;
>      a = {i++;}
>  }
> 
>  {
>      int j = 6;
>      a();
>      assert(j==6);
>  }
> }
> 
>