I've added a fudged test to S12-introspection/attributes.t
that the container shape is as declared; not a Whatever.
On Wed, 19 Apr 2017 03:14:35 -0700, c...@zoffix.com wrote:
> On Tue, 18 Apr 2017 20:34:15 -0700, david.warring wrote:
> > AFAIK there's currently no way of introspecting the shape of a Class
> > attribute that's a native shaped array.
> >
> > I'd like this feature for the Native::Packing module. For example to
> > interpret:
> >
> > class C {
> > has byte @.gif-header[6];
> > has uint16 $.width;
> > has uint16 $height;
> > }
> >
> > At the moment, I just can't determine the size of shaped native arrays,
> > such as @.gif-header above:
> >
> > say .type, .container
> > for C.^attributes;
> >
> > (Positional[byte])(array[byte])
> > (uint16)(uint16)
> > (uint16)(uint16)
>
>
> Seems .container does have method .shape, but it returns a Whatever:
>
> class C {
> has byte @.gif-header[6];
> has uint16 $.width;
> has uint16 $height;
> }
> say .container.shape for C.^attributes[0]; # (*)
> dd C.new.gif-header.shape; # (6,)
>
> my byte @z[6];
> dd @z.shape; # (6,)
