X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fcontent_pres%2FtermContentPres.ml;h=110c78e46e43820fc4ae280e80090f9b35c40544;hb=15c68b7390bae4e2d228056378f882764812b090;hp=e925db0aa7085f11e802c23dbbbca2c5bc6d1caa;hpb=3bd924d184cda530c75cbbc6b6afcdfe91080e71;p=helm.git

diff --git a/helm/software/components/content_pres/termContentPres.ml b/helm/software/components/content_pres/termContentPres.ml
index e925db0aa..110c78e46 100644
--- a/helm/software/components/content_pres/termContentPres.ml
+++ b/helm/software/components/content_pres/termContentPres.ml
@@ -75,6 +75,7 @@ let vbox = box Ast.V
 let hvbox = box Ast.HV
 let hovbox = box Ast.HOV
 let break = Ast.Layout Ast.Break
+let space = Ast.Literal (`Symbol " ")
 let builtin_symbol s = Ast.Literal (`Symbol s)
 let keyword k = add_keyword_attrs (Ast.Literal (`Keyword k))
 
@@ -128,24 +129,26 @@ let pp_ast0 t k =
           match outty_opt with
           | None -> []
           | Some outty ->
-              [ keyword "return"; break; remove_level_info (k outty)]
+              [ space; keyword "return"; space; break; remove_level_info (k outty)]
         in
         let indty_box =
           match indty_opt with
           | None -> []
-          | Some (indty, href) -> [ keyword "in"; break; ident_w_href href indty ]
+          | Some (indty, href) -> [ space; keyword "in"; space; break; ident_w_href href indty ]
         in
         let match_box =
           hvbox false false [
            hvbox false true [
-            hvbox false true [ keyword "match"; break; top_pos (k what) ];
+            hvbox false true [keyword "match"; space; break; top_pos (k what)];
             break;
             hvbox false true indty_box;
             break;
             hvbox false true outty_box
            ];
            break;
-           keyword "with"
+           space;
+           keyword "with";
+           space
          ]
         in
         let mk_case_pattern (head, href, vars) =
@@ -196,29 +199,34 @@ let pp_ast0 t k =
         add_level_info Ast.let_in_prec Ast.let_in_assoc
           (hvbox false true [
             hvbox false true [
-              keyword "let";
+              keyword "let"; space;
               hvbox false true [
-                aux_var var; builtin_symbol "\\def"; break; top_pos (k s) ];
-              break; keyword "in" ];
+                aux_var var; space; builtin_symbol "\\def"; break; top_pos (k s) ];
+              break; space; keyword "in" ];
             break;
             k t ])
     | Ast.LetRec (rec_kind, funs, where) ->
         let rec_op =
           match rec_kind with `Inductive -> "rec" | `CoInductive -> "corec"
         in
-        let mk_fun (args, (name,ty), body, _) =
-         List.map aux_var args ,k name, HExtlib.map_option k ty, k body in
+        let mk_fun (args, (name,ty), body, rec_param) =
+         List.map aux_var args ,k name, HExtlib.map_option k ty, k body,  
+           fst (List.nth args rec_param)
+        in
         let mk_funs = List.map mk_fun in
         let fst_fun, tl_funs =
           match mk_funs funs with hd :: tl -> hd, tl | [] -> assert false
         in
         let fst_row =
-          let (params, name, ty, body) = fst_fun in
+          let (params, name, ty, body, rec_param) = fst_fun in
           hvbox false true ([
             keyword "let";
+            space;
             keyword rec_op;
+            space;
             name] @
             params @
+            [space; keyword "on" ; space ; rec_param ;space ] @
             (match ty with None -> [] | Some ty -> [builtin_symbol ":"; ty]) @
             [ builtin_symbol "\\def";
             break;
@@ -226,12 +234,13 @@ let pp_ast0 t k =
         in
         let tl_rows =
           List.map
-            (fun (params, name, ty, body) ->
+            (fun (params, name, ty, body, rec_param) ->
               [ break;
                 hvbox false true ([
                   keyword "and";
                   name] @
                   params @
+                  [space; keyword "on" ; space; rec_param ;space ] @
                   (match ty with
                       None -> []
                     | Some ty -> [builtin_symbol ":"; ty]) @