* http://helm.cs.unibo.it/
*)
+(** removes a file if it exists *)
+val safe_remove: string -> unit
+
val is_dir: string -> bool (** @return true if file is a directory *)
val is_regular: string -> bool (** @return true if file is a regular file *)
val input_file: string -> string (** read all the contents of file to string *)
+val output_file: string -> string -> unit (** write string to file *)
+
+val absolute_path: string -> string
(** @return true if file is a (textual) proof script *)
val is_proof_script: string -> bool
val append_phrase_sep: string -> string
val strip_trailing_blanks: string -> string
+val strip_trailing_slash: string -> string
+
+val list_uniq: 'a list -> 'a list (* uniq unix filter on lists *)
(** @raise Failure *)
val unopt: 'a option -> 'a
val get_proof_context: MatitaTypes.status -> Cic.context
val get_proof_aliases: MatitaTypes.status -> DisambiguateTypes.environment
+ (** given the base name of an image, returns its full path *)
+val image_path: string -> string
+val obj_file_of_script: string -> string
+
+ (** invoke a given function and return its value; in addition il will print
+ * the given string before invoking it and "/" ^ the given string afterwards.
+ * This permit tracing of functions which does not return a value *)
+val debug_wrap: string -> (unit -> 'a) -> 'a
+