elim tactic: now takes a pattern instead of just a term

[helm.git] / helm / software / components / grafite_parser / grafiteParser.ml

diff --git a/helm/software/components/grafite_parser/grafiteParser.ml b/helm/software/components/grafite_parser/grafiteParser.ml
index 054bff6215e1f64ec1b6d90813a3f7a316b88089..dac05d7bdd056d83d146bbef82e03d886efc6742 100644 (file)
--- a/helm/software/components/grafite_parser/grafiteParser.ml
+++ b/helm/software/components/grafite_parser/grafiteParser.ml
@@ -157,18 +157,19 @@ EXTEND
         GrafiteAst.Contradiction loc
     | IDENT "cut"; t = tactic_term; ident = OPT [ "as"; id = IDENT -> id] ->
         GrafiteAst.Cut (loc, ident, t)
-    | IDENT "decompose"; types = OPT ident_list0; what = OPT IDENT;
-        idents = OPT [ "as"; idents = LIST1 IDENT -> idents ] ->
-        let types = match types with None -> [] | Some types -> types in
+    | IDENT "decompose"; idents = OPT [ "as"; idents = LIST1 IDENT -> idents ] ->
        let idents = match idents with None -> [] | Some idents -> idents in
-       let to_spec id = GrafiteAst.Ident id in
-       GrafiteAst.Decompose (loc, List.rev_map to_spec types, what, idents)
+       GrafiteAst.Decompose (loc, idents)
     | IDENT "demodulate" -> GrafiteAst.Demodulate loc
     | IDENT "destruct"; t = tactic_term ->
         GrafiteAst.Destruct (loc, t)
     | IDENT "elim"; what = tactic_term; using = using;
+       (num, idents) = intros_spec ->
+       let pattern = Some what, [], Some Ast.UserInput in
+       GrafiteAst.Elim (loc, pattern, using, num, idents)
+    | IDENT "elim"; pattern = pattern_spec; using = using;
       (num, idents) = intros_spec ->
-       GrafiteAst.Elim (loc, what, using, num, idents)
+       GrafiteAst.Elim (loc, pattern, using, num, idents)    
     | IDENT "elimType"; what = tactic_term; using = using;
       (num, idents) = intros_spec ->
        GrafiteAst.ElimType (loc, what, using, num, idents)
@@ -220,7 +221,8 @@ EXTEND
         GrafiteAst.Reflexivity loc
     | IDENT "replace"; p = pattern_spec; "with"; t = tactic_term ->
         GrafiteAst.Replace (loc, p, t)
-    | IDENT "rewrite" ; d = direction; t = tactic_term ; p = pattern_spec ->
+    | IDENT "rewrite" ; d = direction; t = tactic_term ; p = pattern_spec;
+       xnames = OPT [ "as"; n = ident_list0 -> n ] ->
        let (pt,_,_) = p in
         if pt <> None then
          raise
@@ -228,7 +230,8 @@ EXTEND
            (CicNotationParser.Parse_error
             "the pattern cannot specify the term to rewrite, only its paths in the hypotheses and in the conclusion")))
         else
-         GrafiteAst.Rewrite (loc, d, t, p)
+        let n = match xnames with None -> [] | Some names -> names in 
+         GrafiteAst.Rewrite (loc, d, t, p, n)
     | IDENT "right" ->
         GrafiteAst.Right loc
     | IDENT "ring" ->
@@ -254,12 +257,12 @@ EXTEND
         | BYC_weproved (ty,id,t1) ->
            GrafiteAst.By_term_we_proved(loc, t', ty, id, t1)
         | BYC_letsuchthat (id1,t1,id2,t2) ->
-           (match t with
+          (* (match t with
                LNone floc ->
                  raise (HExtlib.Localized
                  (floc,CicNotationParser.Parse_error
                    "tactic_term expected here"))
-              | LSome t -> GrafiteAst.ExistsElim (loc, t, id1, t1, id2, t2))
+              | LSome t ->*) GrafiteAst.ExistsElim (loc, t', id1, t1, id2, t2)(*)*)
         | BYC_wehaveand (id1,t1,id2,t2) ->
            (match t with
                LNone floc ->
@@ -424,11 +427,11 @@ EXTEND
     [ [ IDENT "check"   ]; t = term ->
         GrafiteAst.Check (loc, t)
     | [ IDENT "inline"]; 
-        style = OPT [ IDENT "procedural" ];
+        style = OPT [ IDENT "procedural"; depth = OPT int -> depth ];
        suri = QSTRING; prefix = OPT QSTRING ->
          let style = match style with 
-           | None   -> GrafiteAst.Declarative
-           | Some _ -> GrafiteAst.Procedural
+           | None       -> GrafiteAst.Declarative
+           | Some depth -> GrafiteAst.Procedural depth
         in
         let prefix = match prefix with None -> "" | Some prefix -> prefix in
         GrafiteAst.Inline (loc,style,suri,prefix)
@@ -572,6 +575,11 @@ EXTEND
         GrafiteAst.Obj (loc, Ast.Theorem (`Axiom, name, typ, None))
     | "let"; ind_kind = [ "corec" -> `CoInductive | "rec"-> `Inductive ];
         defs = CicNotationParser.let_defs -> 
+         (* In case of mutual definitions here we produce just
+            the syntax tree for the first one. The others will be
+            generated from the completely specified term just before
+            insertion in the environment. We use the flavour
+            `MutualDefinition to rememer this. *)
           let name,ty = 
             match defs with
             | (params,(Ast.Ident (name, None), Some ty),_,_) :: _ ->
@@ -586,8 +594,14 @@ EXTEND
             | _ -> assert false 
           in
           let body = Ast.Ident (name,None) in
-          GrafiteAst.Obj (loc, Ast.Theorem(`Definition, name, ty,
-            Some (Ast.LetRec (ind_kind, defs, body))))
+          let flavour =
+           if List.length defs = 1 then
+            `Definition
+           else
+            `MutualDefinition
+          in
+           GrafiteAst.Obj (loc, Ast.Theorem(flavour, name, ty,
+             Some (Ast.LetRec (ind_kind, defs, body))))
     | IDENT "inductive"; spec = inductive_spec ->
         let (params, ind_types) = spec in
         GrafiteAst.Obj (loc, Ast.Inductive (params, ind_types))
@@ -661,7 +675,7 @@ EXTEND
             (loc,GrafiteAst.Include (iloc,buri))))
     | scom = lexicon_command ; SYMBOL "." ->
        fun ~include_paths status ->
-        let status = LexiconEngine.eval_command status scom in
+       let status = LexiconEngine.eval_command status scom in
          status,LNone loc
     | EOI -> raise End_of_file
     ]