now sd_field_nr used instead of fs_index

s/\<mod_name\>/mod_ident/g
s/\<ps_field_name\>/ps_field_ident/g
s/\<ps_selector_name\>/ps_selector_ident/g
s/\<pc_cons_name\>/pc_cons_ident/g
s/\<class_name\>/class_ident/g
s/\<gen_name\>/gen_ident/g
s/\<gen_member_name\>/gen_member_ident/g
s/\<gc_name\>/gc_ident/g
s/\<gc_gname\>/gc_gident/g
s/\<fs_name\>/fs_ident/g
s/\<td_name\>/td_ident/g
s/\<fv_name\>/fv_ident/g
s/\<var_name\>/var_ident/g
s/\<type_name\>/type_ident/g
s/\<symb_name\>/symb_ident/g
s/\<tv_name\>/tv_ident/g
s/\<av_name\>/av_ident/g
s/\<me_symb\>/me_ident/g
s/\<ft_symb\>/ft_ident/g
s/\<fun_symb\>/fun_ident/g
s/\<cons_symb\>/cons_ident/g
s/\<sd_symb\>/sd__ident/g

unboxed array applied to a basic type is explicitly treated as
a type of kind star.

- compare def imp for generics
- foldExpr
- type synonym expansion

foo :: a a -> Bool | eq{|*|} a