Set pp::colors false Set lean::parser::verbose false. Notation 10 if _ then _ : implies. Show Environment 1. Show if true then false. Variable a : Bool. Show if true then if a then false. Set lean::pp::notation false. Show if true then if a then false. Variable A : Type. Variable f : A -> A -> A -> Bool. Notation 100 _ |- _ ; _ : f. Show Environment 1. Variable c : A. Variable d : A. Variable e : A. Show c |- d ; e. Set lean::pp::notation true. Show c |- d ; e. Variable fact : A -> A. Notation 20 _ ! : fact. Show a! !. Set lean::pp::notation false. Show a! !. Set lean::pp::notation true. Variable g : A -> A -> A. Notation 30 [ _ ; _ ] : g Show [c;d]. Show [c ; [d;e] ]. Set lean::pp::notation false. Show [c ; [d;e] ]. Set lean::pp::notation true. Variable h : A -> A -> A. Notation 40 _ << _ end : h. Show Environment 1. Show d << e end. Show [c ; d << e end ]. Set lean::pp::notation false. Show [c ; d << e end ]. Set lean::pp::notation true. Variable r : A -> A -> A. Infixl 30 ++ : r. Variable s : A -> A -> A. Infixl 40 ** : s. Show c ** d ++ e ** c. Variable p1 : Bool. Variable p2 : Bool. Variable p3 : Bool. Show p1 || p2 && p3. Set lean::pp::notation false. Show c ** d ++ e ** c. Show p1 || p2 && p3. Set lean::pp::notation true. Show c = d || d = c. Show not p1 || p2. Show p1 && p3 || p2 && p3. Set lean::pp::notation false. Show not p1 || p2. Show p1 && p3 || p2 && p3.