From 97fefe1fcca363a1317e066e7f4b99b9c1e9987b Mon Sep 17 00:00:00 2001
From: Stephane Glondu <steph@glondu.net>
Date: Thu, 12 Jan 2012 16:02:20 +0100
Subject: Imported Upstream version 8.4~beta

---
 test-suite/success/PCase.v | 66 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 test-suite/success/PCase.v

(limited to 'test-suite/success/PCase.v')

diff --git a/test-suite/success/PCase.v b/test-suite/success/PCase.v
new file mode 100644
index 00000000..67d680ba
--- /dev/null
+++ b/test-suite/success/PCase.v
@@ -0,0 +1,66 @@
+
+(** Some tests of patterns containing matchs ending with joker branches.
+    Cf. the new form of the [constr_pattern] constructor [PCase]
+    in [pretyping/pattern.ml] *)
+
+(* A universal match matcher *)
+
+Ltac kill_match :=
+ match goal with
+   |- context [ match ?x with _ => _ end ] => destruct x
+ end.
+
+(* A match matcher restricted to a given type : nat *)
+
+Ltac kill_match_nat :=
+ match goal with
+   |- context [ match ?x in nat with _ => _ end ] => destruct x
+ end.
+
+(* Another way to restrict to a given type : give a branch *)
+
+Ltac kill_match_nat2 :=
+ match goal with
+   |- context [ match ?x with S _ => _ | _ => _ end ] => destruct x
+ end.
+
+(* This should act only on empty match *)
+
+Ltac kill_match_empty :=
+ match goal with
+   |- context [ match ?x with end ] => destruct x
+ end.
+
+Lemma test1 (b:bool) : if b then True else O=O.
+Proof.
+ Fail kill_match_nat.
+ Fail kill_match_nat2.
+ Fail kill_match_empty.
+ kill_match. exact I. exact eq_refl.
+Qed.
+
+Lemma test2a (n:nat) : match n with O => True | S n => (n = n) end.
+Proof.
+ Fail kill_match_empty.
+ kill_match_nat. exact I. exact eq_refl.
+Qed.
+
+Lemma test2b (n:nat) : match n with O => True | S n => (n = n) end.
+Proof.
+ kill_match_nat2. exact I. exact eq_refl.
+Qed.
+
+Lemma test2c (n:nat) : match n with O => True | S n => (n = n) end.
+Proof.
+ kill_match. exact I. exact eq_refl.
+Qed.
+
+Lemma test3a (f:False) : match f return Prop with end.
+Proof.
+ kill_match_empty.
+Qed.
+
+Lemma test3b (f:False) : match f return Prop with end.
+Proof.
+ kill_match.
+Qed.
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