In this PR we add viewer/cloner codegen support for the following field types, where View is an existing,
likely generated, view type and T is a struct (rather than a pointer to struct).
- []T
- []View
- map[K]View
To support []T, we introduce the generic view type view.ValueSliceView[T, P, V].
Here, P (i.e. *T) implements ViewCloner[*T, V], and V is the concrete view type for T.
For the slices and maps of views we use existing views.Slice and view.Map view types.
This is mostly done in a preparation for generating netmap.NetworkMapView.
Updates #12614
Updates tailscale/corp#27502
Signed-off-by: Nick Khyl <nickk@tailscale.com>
20d6058e7b