(analyze-host-expr {:keys [op target form tag env class], :as ast})
Performing some reflection, transforms :host-interop/:host-call/:host-field
nodes in either: :static-field, :static-call, :instance-call, :instance-field
or :host-interop nodes, and a :var or :maybe-class node in a :const :class node,
if necessary (class literals shadow Vars).
A :host-interop node represents either an instance-field or a no-arg instance-method.