From: Claudio Sacerdoti Coen <claudio.sacerdoticoen@unibo.it>
Date: Thu, 23 Jun 2005 12:14:53 +0000 (+0000)
Subject: 1 .Tactic generalize ported to patterns and activated in matita.
X-Git-Tag: INDEXING_NO_PROOFS~97
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=6a9b5c500ba77d823730202fb9b0c5fcb5b269de;p=helm.git

1 .Tactic generalize ported to patterns and activated in matita.
2. new syntax for patterns:
   "in H0 [: ty] ; ... ; Hn [: ty] [\vdash ty]"
   where the list of hypotheses may be empty
---

diff --git a/helm/ocaml/cic_disambiguation/cicTextualParser2.ml b/helm/ocaml/cic_disambiguation/cicTextualParser2.ml
index a1fcc9205..086c30787 100644
--- a/helm/ocaml/cic_disambiguation/cicTextualParser2.ml
+++ b/helm/ocaml/cic_disambiguation/cicTextualParser2.ml
@@ -329,14 +329,14 @@ EXTEND
     | [ IDENT "normalize" ] -> `Normalize ]
   ];
   pattern_spec: [
-    [ hyp_paths =
-      OPT [
-        paths = LIST1 [ id = IDENT ; SYMBOL ":" ; path = term -> (id,path) ]
-          SEP SYMBOL ";";
-        SYMBOL <:unicode<vdash>> ->
-          paths ];
-      goal_path = OPT term ->
-        let hyp_paths = match hyp_paths with None -> [] | Some l -> l in
+    [ "in";
+      hyp_paths =
+       LIST0
+        [ id = IDENT ;
+          path = OPT [SYMBOL ":" ; path = term -> path ] ->
+          (id,match path with Some p -> p | None -> CicAst.UserInput) ]
+        SEP SYMBOL ";";
+      goal_path = OPT [ SYMBOL <:unicode<vdash>>; term = term -> term ] ->
         (hyp_paths, goal_path) ]
   ];
   direction: [
@@ -400,16 +400,19 @@ EXTEND
        where = IDENT ; SYMBOL <:unicode<def>> ; t = tactic_term ->
         TacticAst.LetIn (loc, t, where)
     | kind = reduction_kind;
-      p = OPT [ "in" ; p = pattern_spec -> p ] ->
+      p = OPT [ pattern_spec ] ->
         let p = match p with None -> [], None | Some p -> p in
         TacticAst.Reduce (loc, kind, p)
+    | IDENT "generalize"; t = tactic_term; p = OPT [ pattern_spec ] ->
+       let p = match p with None -> [], None | Some p -> p in
+       TacticAst.Generalize (loc,t,p)
     | [ IDENT "reflexivity" ] ->
         TacticAst.Reflexivity loc
     | [ IDENT "replace" ];
       t1 = tactic_term; "with"; t2 = tactic_term ->
         TacticAst.Replace (loc, t1, t2)
     | IDENT "rewrite" ; d = direction; t = term ;
-      p = OPT [ "in"; p = pattern_spec -> p ] ->
+      p = OPT [ pattern_spec ] ->
         let p = match p with None -> [], None | Some p -> p in
         TacticAst.Rewrite (loc, d, t, p)
     | [ IDENT "right" ] -> TacticAst.Right loc