From 0d948350f66621e17334c75789192655d76c4cf6 Mon Sep 17 00:00:00 2001
From: Makarius Wenzel <makarius@sketis.net>
Date: Wed, 18 Aug 1999 17:02:43 +0000
Subject: obsolete;

---
 isa/wip.ML | 108 -------------------------------------------------------------
 1 file changed, 108 deletions(-)
 delete mode 100644 isa/wip.ML

diff --git a/isa/wip.ML b/isa/wip.ML
deleted file mode 100644
index c9bdffd2..00000000
--- a/isa/wip.ML
+++ /dev/null
@@ -1,108 +0,0 @@
-(* $Id *)
-	
-(* Work in progress for ProofGeneral.ML:  modified theory reader code. *)
-
-	
-(*Check if a theory file has changed since its last use.
-  Return a pair of boolean values for .thy and for .ML *)
-fun thy_unchanged thy thy_file ml_file =
-  case get_thyinfo thy of
-      Some {thy_time, ml_time, ...} =>
-       let val tn = is_none thy_time;
-           val mn = is_none ml_time
-       in if not tn andalso not mn then
-            ((file_info thy_file = the thy_time),
-             (file_info ml_file = the ml_time))
-          else if not tn andalso mn then
-            (file_info thy_file = the thy_time, false)
-          else
-            (false, false)
-       end
-    | None => (false, false)
-
-(*Remove a theory from loaded_thys *)
-fun remove_thy tname =
-  loaded_thys := Symtab.make (filter_out (fn (id, _) => id = tname)
-
-(*Change thy_time and ml_time for an existent item *)
-fun set_info tname thy_time ml_time =
-  let val tinfo = case Symtab.lookup (!loaded_thys, tname) of
-         Some ({path, children, parents, theory, thy_time = _, ml_time = _}) =>
-            {path = path, children = children, parents = parents,
-                     thy_time = thy_time, ml_time = ml_time, theory = theory}
-        | None => error ("set_info: theory " ^ tname ^ " not found");
-  in loaded_thys := Symtab.update ((tname, tinfo), !loaded_thys) end;
-
-                 (Symtab.dest (!loaded_thys)));
-
-(*Mark theory as changed since last read if it has been completly read *)
-fun mark_outdated tname =
-  let val t = get_thyinfo tname;
-  in if is_none t then ()
-     else
-       let val {thy_time, ml_time, ...} = the t
-       in set_info tname (if is_none thy_time then None else Some "")
-                         (if is_none ml_time then None else Some "")
-       end
-  end;
-
-(*Directory given as parameter to use_thy. This is temporarily added to
-  loadpath while the theory's ancestors are loaded.*)
-val tmp_loadpath = ref [] : string list ref;
-
-
-fun update () =
-  let (*List theories in the order they have to be loaded in.*)
-      fun load_order [] result = result
-        | load_order thys result =
-            let fun next_level [] = []
-                  | next_level (t :: ts) =
-                      let val children = children_of t
-                      in children union (next_level ts) end;
-
-                val descendants = next_level thys;
-            in load_order descendants ((result \\ descendants) @ descendants)
-            end;
-
-      fun reload_changed (t :: ts) =
-            let val abspath = case get_thyinfo t of
-                                  Some ({path, ...}) => path
-                                | None => "";
-
-                val (thy_file, ml_file) = get_thy_filenames abspath t;
-		val _ = if thy_file = "" andalso ml_file = "" then
-			error "Giving up"  else ()
-                val (thy_uptodate, ml_uptodate) =
-                        thy_unchanged t thy_file ml_file;
-             in if thy_uptodate andalso ml_uptodate then
- 		(if !update_verbose then
- 	         (writeln
- 		   ("Not reading \"" ^ thy_file ^
- 		          "\" (unchanged)" ^
- 		    (if ml_file <> ""
- 		      then "\nNot reading \"" ^ ml_file ^
- 			   "\" (unchanged)"
- 	              else "")))
- 	         else ())
- 		else use_thy t;
-               reload_changed ts
-            end
-        | reload_changed [] = ();
-
-     (*Remove all theories that are no descendants of ProtoPure.
-       If there are still children in the deleted theory's list
-       schedule them for reloading *)
-     fun collect_garbage no_garbage =
-       let fun collect ((tname, {children, ...}: thy_info) :: ts) =
-                 if tname mem no_garbage then collect ts
-                 else (writeln ("Theory \"" ^ tname ^
-                       "\" is no longer linked with ProtoPure - removing it.");
-                       remove_thy tname;
-                       seq mark_outdated children)
-             | collect [] = ()
-       in collect (Symtab.dest (!loaded_thys)) end;
-  in tmp_loadpath := [];
-     collect_garbage ("ProtoPure" :: (load_order ["ProtoPure"] []));
-     reload_changed (load_order ["Pure", "CPure"] [])
-  end;
-
-- 
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