Adding an example file

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/example1.v b/tests/example1.v
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+++ b/tests/example1.v
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+Require Import Ltac2.Ltac2.
+
+Import Ltac2.Control.
+
+(** Alternative implementation of the hyp primitive *)
+Ltac2 get_hyp_by_name x :=
+  let h := hyps () in
+  let rec find x l := match l with
+  | [] => zero Not_found
+  | p :: l =>
+    match p with
+    | (id, _, t) =>
+      match Ident.equal x id with
+      | true => t
+      | false => find x l
+      end
+    end
+  end in
+  find x h.
+
+Print Ltac2 get_hyp_by_name.
+
+Goal forall n m, n + m = 0 -> n = 0.
+Proof.
+refine (fun () => '(fun n m H => _)).
+let t := get_hyp_by_name @H in Message.print (Message.of_constr t).