Empty Result

[Ali Çehreli via Digitalmars-d-learn]

On 04/17/2017 12:33 PM, H. S. Teoh via Digitalmars-d-learn wrote:
> On Mon, Apr 17, 2017 at 12:05:19PM -0700, Ali Çehreli via Digitalmars-d-learn wrote:
> [...]
>> auto byNode(const(Tree) tree) {
>>     alias RangeType = typeof(byNode(tree.root));
>
> Could this possibly be simplified to:
>
> 	alias RangeType = typeof(return);
>
> ?

Thank you. That's much better but only if I restructure the code to use 
an if statement:

auto byNode(const(Tree) tree) {
     if (tree.root) {
         return byNode(tree.root);
     }
     else {
         alias RangeType = typeof(return);
         return new RangeType(() {});
     }
}

That works because the return type of the function is the first return 
statement. (My original code had only one return and that was the problem.)

Ali