--- /dev/null
+[\lambda x:nat. nat]
+match O:nat with
+[ O \Rightarrow O
+| (S x) \Rightarrow (S (S x)) ]
+### (* METASENV after disambiguation *)
+
+### (* TERM after disambiguation *)
+
+<[x:nat]nat>Cases O of
+ O => O
+ S => [x:nat](S (S x))
+end
+### (* TYPE_OF the disambiguated term *)
+([x:nat]nat O)
+### (* REDUCED disambiguated term *)
+O