+ if !ErrorMsg.anyErrors then
+ G
+ else
+ Tycheck.checkFile G (tInit ()) prog
+ end
+
+fun basis () =
+ let
+ val dir = Posix.FileSys.opendir Config.libRoot
+
+ fun loop files =
+ case Posix.FileSys.readdir dir of
+ NONE => (Posix.FileSys.closedir dir;
+ files)
+ | SOME fname =>
+ if String.isSuffix ".dtl" fname then
+ loop (OS.Path.joinDirFile {dir = Config.libRoot,
+ file = fname}
+ :: files)
+ else
+ loop files
+
+ val files = loop []
+ val files = Order.order files
+ in
+ if !ErrorMsg.anyErrors then
+ Env.empty
+ else
+ foldl (fn (fname, G) => check' G fname) Env.empty files
+ end
+
+fun check fname =
+ let
+ val _ = ErrorMsg.reset ()
+ val _ = Env.preTycheck ()
+
+ val b = basis ()
+ in
+ if !ErrorMsg.anyErrors then
+ (b, NONE)
+ else
+ let
+ val _ = ErrorMsg.reset ()
+ val prog = Parse.parse fname
+ in
+ if !ErrorMsg.anyErrors then
+ (Env.empty, NONE)
+ else
+ let
+ val G' = Tycheck.checkFile b (tInit ()) prog
+ in
+ (G', #3 prog)
+ end
+ end
+ end
+
+fun reduce fname =
+ let
+ val (G, body) = check fname
+ in
+ if !ErrorMsg.anyErrors then
+ NONE
+ else
+ case body of
+ SOME body =>
+ let
+ val body' = Reduce.reduceExp G body
+ in
+ (*printd (PD.hovBox (PD.PPS.Rel 0,
+ [PD.string "Result:",
+ PD.space 1,
+ p_exp body']))*)
+ SOME body'
+ end
+ | _ => NONE
+ end
+
+fun eval fname =
+ case reduce fname of
+ (SOME body') =>