2 files changed, 46 insertions, 2 deletions
diff --git a/library/declare.ml b/library/declare.ml
index 1257044d3..ffe53e505 100644
--- a/library/declare.ml
+++ b/library/declare.ml
@@ -281,3 +281,37 @@ let declare_mind isrecord mie =
   !xml_declare_inductive (isrecord,oname);
   oname
 
+(* Declaration messages *)
+
+let pr_rank i = str (ordinal (i+1))
+
+let fixpoint_message indexes l =
+  Flags.if_verbose msgnl (match l with
+  | [] -> anomaly "no recursive definition"
+  | [id] -> pr_id id ++ str " is recursively defined" ++
+      (match indexes with
+	 | Some [|i|] -> str " (decreasing on "++pr_rank i++str " argument)"
+	 | _ -> mt ())
+  | l -> hov 0 (prlist_with_sep pr_coma pr_id l ++
+		  spc () ++ str "are recursively defined" ++
+		  match indexes with
+		    | Some a -> spc () ++ str "(decreasing respectively on " ++
+			prlist_with_sep pr_coma pr_rank (Array.to_list a) ++
+			str " arguments)"
+		    | None -> mt ()))
+
+let cofixpoint_message l =
+  Flags.if_verbose msgnl (match l with
+  | [] -> anomaly "No corecursive definition."
+  | [id] -> pr_id id ++ str " is corecursively defined"
+  | l -> hov 0 (prlist_with_sep pr_coma pr_id l ++
+                    spc () ++ str "are corecursively defined"))
+
+let recursive_message isfix i l =
+  (if isfix then fixpoint_message i else cofixpoint_message) l
+
+let definition_message id =
+  Flags.if_verbose msgnl (pr_id id ++ str " is defined")
+
+let assumption_message id =
+  Flags.if_verbose msgnl (pr_id id ++ str " is assumed")
diff --git a/library/declare.mli b/library/declare.mli
index 1a68f8e20..09526f341 100644
--- a/library/declare.mli
+++ b/library/declare.mli
@@ -59,10 +59,20 @@ val declare_internal_constant :
    the whole block (boolean must be true iff it is a record) *)
 val declare_mind : bool -> mutual_inductive_entry -> object_name
 
-(* hooks for XML output *)
+(* Hooks for XML output *)
 val set_xml_declare_variable : (object_name -> unit) -> unit
 val set_xml_declare_constant : (bool * constant -> unit) -> unit
 val set_xml_declare_inductive : (bool * object_name -> unit) -> unit
 
-(* hook for the cache function of constants and inductives *)
+(* Hook for the cache function of constants and inductives *)
 val add_cache_hook : (full_path -> unit) -> unit
+
+(* Declaration messages *)
+
+val definition_message : identifier -> unit
+val assumption_message : identifier -> unit
+val fixpoint_message : int array option -> identifier list -> unit
+val cofixpoint_message : identifier list -> unit
+val recursive_message : bool (* true = fixpoint *) ->
+  int array option -> identifier list -> unit
+