--
set_option pp.notation false
set_option pp.implicit true

namespace foo
  constant N : Type.{1}
  constant z : N
  constant o : N
  constant a : N
  notation 0 := z
  notation 1 := o

  #check a = 0
end foo

#check (2:nat) = 1
#check foo.a = 1

open foo
#check a = 1