Merge of the V7_3_new_exportation branch.

[helm.git] / helm / ocaml / tactics / introductionTactics.ml

diff --git a/helm/ocaml/tactics/introductionTactics.ml b/helm/ocaml/tactics/introductionTactics.ml
new file mode 100644 (file)
index 0000000..6318f48
--- /dev/null
+++ b/helm/ocaml/tactics/introductionTactics.ml
@@ -0,0 +1,60 @@
+(* Copyright (C) 2002, HELM Team.
+ *
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ *
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA  02111-1307, USA.
+ *
+ * For details, see the HELM World-Wide-Web page,
+ * http://cs.unibo.it/helm/.
+ *)
+
+
+let constructor_tac ~n ~status:(proof, goal) =
+  let module C = Cic in
+  let module R = CicReduction in
+   let (_,metasenv,_,_) = proof in
+    let metano,context,ty = List.find (function (m,_,_) -> m=goal) metasenv in
+     match (R.whd context ty) with
+        (C.MutInd (uri, typeno, exp_named_subst))
+      | (C.Appl ((C.MutInd (uri, typeno, exp_named_subst))::_)) ->
+         PrimitiveTactics.apply_tac 
+          ~term: (C.MutConstruct (uri, typeno, n, exp_named_subst))
+          ~status:(proof, goal)
+      | _ -> raise (ProofEngineTypes.Fail "Constructor: failed")
+;;
+
+
+let exists_tac ~status =
+  constructor_tac ~n:1 ~status
+;;
+
+
+let split_tac ~status =
+  constructor_tac ~n:1 ~status
+;;
+
+
+let left_tac ~status =
+  constructor_tac ~n:1 ~status
+;;
+
+
+let right_tac ~status =
+  constructor_tac ~n:2 ~status
+;;
+