X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fgrafite%2FgrafiteAstPp.ml;h=e433c9b7b73cf0aa4b261020e8a9287fbe6422af;hb=c0a733b932a64804f67ac93f9ab9f52bd0614fc6;hp=d5fbf80343c42a413c718b27fa3bbc93baf1dfaf;hpb=86cced899859b1730a4789d3ba0db71d21a37604;p=helm.git

diff --git a/helm/software/components/grafite/grafiteAstPp.ml b/helm/software/components/grafite/grafiteAstPp.ml
index d5fbf8034..e433c9b7b 100644
--- a/helm/software/components/grafite/grafiteAstPp.ml
+++ b/helm/software/components/grafite/grafiteAstPp.ml
@@ -95,15 +95,8 @@ let rec pp_tactic ~term_pp ~lazy_term_pp =
   | Cut (_, ident, term) ->
      "cut " ^ term_pp term ^
       (match ident with None -> "" | Some id -> " as " ^ id)
-  | Decompose (_, [], what, names) ->
-      sprintf "decompose %s%s" (opt_string_pp what) (pp_intros_specs (None, names)) 
-  | Decompose (_, types, what, names) ->
-      let to_ident = function
-         | Ident id -> id
-	 | Type _   -> assert false 
-      in
-      let types = List.rev_map to_ident types in
-      sprintf "decompose %s %s%s" (pp_idents types) (opt_string_pp what) (pp_intros_specs (None, names)) 
+  | Decompose (_, names) ->
+      sprintf "decompose%s" (pp_intros_specs (None, names)) 
   | Demodulate _ -> "demodulate"
   | Destruct (_, term) -> "destruct " ^ term_pp term
   | Elim (_, term, using, num, idents) ->
@@ -173,7 +166,7 @@ let rec pp_tactic ~term_pp ~lazy_term_pp =
   | We_proceed_by_induction_on (_, term, term1) -> "we proceed by induction on" ^ term_pp term ^ "to prove" ^ term_pp term1
   | Byinduction (_, term, ident) -> "by induction hypothesis we know" ^ term_pp term ^ "(" ^ ident ^ ")"
   | Thesisbecomes (_, term) -> "the thesis becomes " ^ term_pp term
-  | ExistsElim (_, term0, ident, term, ident1, term1) -> "by " ^ term_pp term0 ^ "let " ^ ident ^ ":" ^ term_pp term ^ "such that " ^ term_pp term1 ^ "(" ^ ident1 ^ ")"
+  | ExistsElim (_, term0, ident, term, ident1, term1) -> "by " ^ (match term0 with None -> "_" | Some term -> term_pp term) ^ "let " ^ ident ^ ":" ^ term_pp term ^ "such that " ^ lazy_term_pp term1 ^ "(" ^ ident1 ^ ")"
   | AndElim (_, term, ident1, term1, ident2, term2) -> "by " ^ term_pp term ^ "we have " ^ term_pp term1 ^ " (" ^ ident1 ^ ") " ^ "and " ^ term_pp term2 ^ " (" ^ ident2 ^ ")" 
   | RewritingStep (_, term, term1, term2, cont) -> (match term with None -> " " | Some (None,term) -> "conclude " ^ term_pp term | Some (Some name,term) -> "obtain (" ^ name ^ ") " ^ term_pp term) ^ "=" ^ term_pp term1 ^ (match term2 with `Auto params -> "_" ^ String.concat " " (List.map (fun (k,v) -> if v <> "" then k ^ "=" ^ v else k) params)  | `Term term2 -> term_pp term2) ^ (if cont then " done" else "")
   | Case (_, id, args) ->