Combining infinite ranges

[Graham Fawcett]

On Wed, 02 Jun 2010 20:21:49 -0500, Andrei Alexandrescu wrote:
> 
> My point was that there's no need to sit down and implement
> functionality. Just write
> 
> auto enumerate(R)(R r) if (isInputRange!R) {
>      return zip(iota(0, size_t.max), r);
> }

Should this work with v2.043? I get an error if I try to enumerate an
array, for example:

    /* example.d */
    import std.range;

    auto enumerate(R)(R r) if (isInputRange!R) {
         return zip(iota(0, size_t.max), r);
    }

    void main() {
      auto e = enumerate([10,20,30]);
    }

$ dmd example.d
/usr/include/d/dmd/phobos/std/range.d(1773): Error: cannot implicitly 
convert expression (&this.ranges._field_field_0.front) of type uint 
delegate() to uint*

(The error message is unfortunate: it doesn't indicate the offending
expression in example.d.)

Thanks,
Graham