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+Require Coq.Unicode.Utf8.
+
+(** The purpose of this file is to test printing of the destructive
+    patterns used in binders ([fun] and [forall]). *)
+
+Parameters (A B : Type) (P:A->Prop).
+
+Definition swap '((x,y) : A*B) := (y,x).
+Print swap.
+
+Check fun '((x,y) : A*B) => (y,x).
+
+Check forall '(x,y), swap (x,y) = (y,x).
+
+Definition proj_informative '(exist _ x _ : { x:A | P x }) : A := x.
+Print proj_informative.
+
+Inductive Foo := Bar : nat -> bool -> unit -> nat -> Foo.
+Definition foo '(Bar n b tt p) :=
+  if b then n+p else n-p.
+Print foo.
+
+Definition baz '(Bar n1 b1 tt p1) '(Bar n2 b2 tt p2) := n1+p1.
+Print baz.
+
+Module WithParameters.
+
+Definition swap {A B} '((x,y) : A*B) := (y,x).
+Print swap.
+
+Check fun (A B:Type) '((x,y) : A*B) => swap (x,y) = (y,x).
+Check forall (A B:Type) '((x,y) : A*B), swap (x,y) = (y,x).
+
+Check exists '((x,y):A*A), swap (x,y) = (y,x).
+Check exists '((x,y):A*A) '(z,w), swap (x,y) = (z,w).
+
+End WithParameters.
+
+(** Some test involving unicode notations. *)
+Module WithUnicode.
+
+  Import Coq.Unicode.Utf8.
+
+  Check λ '((x,y) : A*B),  (y,x).
+  Check ∀ '(x,y), swap (x,y) = (y,x).
+
+End WithUnicode.
+
+(** * Suboptimal printing *)
+
+Module Suboptimal.
+
+(** This test shows an example which exposes the [let] introduced by
+    the pattern notation in binders. *)
+
+Inductive Fin (n:nat) := Z : Fin n.
+Definition F '(n,p) : Type := (Fin n * Fin p)%type.
+Definition both_z '(n,p) : F (n,p) := (Z _,Z _).
+Print both_z.
+
+(** Test factorization of binders *)
+
+Check fun '((x,y) : A*B) '(z,t) => swap (x,y) = (z,t).
+Check forall '(x,y) '((z,t) : B*A), swap (x,y) = (z,t).
+
+End Suboptimal.