fibers and ranges: what's wrong here?

[zeljkog via Digitalmars-d-learn]

On 13.12.14 13:01, zeljkog wrote:
>
> void main() {
>    auto tt = Tree(5, [Tree(7,[Tree(11), Tree(4)]), Tree(10)]);
>    auto tr1 = TreeRange(tt);
>    foreach(v; tr1){
>      writef("%2d, ", v);
>    }
>    writeln();
>    for(auto r = TreeRange(tt); !r.empty; r.popFront())
>      writef("%2d, ", r.front);
>    writeln();
> }
>

Sorry, this works:

void main() {
   auto tt = Tree(5, [Tree(7,[Tree(11), Tree(4)]), Tree(10)]);
   foreach(v; TreeRange(tt)){
     writef("%2d, ", v);
   }
   writeln();
   for(auto r = TreeRange(tt); !r.empty; r.popFront())
     writef("%2d, ", r.front);
   writeln();
}

I needed this:

struct TreeRange{
   this (this){ throw new Exception("TreeRange is noncopyable!"); }
   ...
}

Or use class :)