New declarative tactic "we proceed by cases on t to prove t'".

[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 14802a629e8cd32360a33c33d1550f506fc50b84..054bff6215e1f64ec1b6d90813a3f7a316b88089 100644 (file)
--- a/helm/software/components/grafite_parser/grafiteParser.ml
+++ b/helm/software/components/grafite_parser/grafiteParser.ml
@@ -116,9 +116,15 @@ EXTEND
     | SYMBOL "<" -> `RightToLeft ]
   ];
   int: [ [ num = NUMBER -> int_of_string num ] ];
+  intros_names: [
+   [ idents = OPT ident_list0 ->
+      match idents with None -> [] | Some idents -> idents
+   ]
+  ];
   intros_spec: [
-    [ num = OPT [ num = int -> num ]; idents = OPT ident_list0 ->
-        let idents = match idents with None -> [] | Some idents -> idents in
+    [ OPT [ IDENT "names" ]; 
+      num = OPT [ num = int -> num ]; 
+      idents = intros_names ->
         num, idents
     ]
   ];
@@ -136,6 +142,9 @@ EXTEND
         GrafiteAst.Assumption loc
     | IDENT "auto"; params = auto_params ->
         GrafiteAst.Auto (loc,params)
+    | IDENT "cases"; what = tactic_term;
+      (num, idents) = intros_spec ->
+       GrafiteAst.Cases (loc, what, idents)
     | IDENT "clear"; ids = LIST1 IDENT ->
         GrafiteAst.Clear (loc, ids)
     | IDENT "clearbody"; id = IDENT ->
@@ -260,6 +269,8 @@ EXTEND
               | LSome t -> GrafiteAst.AndElim (loc, t, id1, t1, id2, t2)))
     | IDENT "we" ; IDENT "need" ; "to" ; IDENT "prove" ; t = tactic_term ; id = OPT [ LPAREN ; id = IDENT ; RPAREN -> id ] ; t1 = OPT [IDENT "or" ; IDENT "equivalently"; t' = tactic_term -> t']->
         GrafiteAst.We_need_to_prove (loc, t, id, t1)
+    | IDENT "we" ; IDENT "proceed" ; IDENT "by" ; IDENT "cases" ; "on" ; t=tactic_term ; "to" ; IDENT "prove" ; t1=tactic_term ->  
+        GrafiteAst.We_proceed_by_cases_on (loc, t, t1)
     | IDENT "we" ; IDENT "proceed" ; IDENT "by" ; IDENT "induction" ; "on" ; t=tactic_term ; "to" ; IDENT "prove" ; t1=tactic_term ->  
         GrafiteAst.We_proceed_by_induction_on (loc, t, t1)
     | IDENT "by" ; IDENT "induction" ; IDENT "hypothesis" ; IDENT "we" ; IDENT "know" ; t=tactic_term ; LPAREN ; id = IDENT ; RPAREN ->