opIndexCall

[Bill Baxter]

Dan wrote:
> I've recently discovered the want for an opIndexCall override in D.
> 
> For this:
> 
> struct Y {
>   ...
>   Y function() f;
> }
> 
> struct X {
>   char[][] keys;
>   Y[] values;
>   opIndex()
>   opIndexAssign()
> }
> 
> Y myF(){
>   Y y;
>   return y;
> }
> 
> 
> X z;
> 
> z["hello"] = &myF;
> 
> z["hello"](); // <-- can't do that.
> 
> Y function() a; // have to do this?
> a = z["hello"];  // and this
> a();                 // and this?

Does it work if you use a plain method instead of indexing?  I.e. if you 
add a get_elem(char[] key), does get_elem("hello")() work?

It sounds more like a bug to me than a need for an opIndexCall. 
Something seems fishy about your code, though.  You have a Y[] array, 
but no array of Y function() anywhere.

--bb