* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-*)
+ *)
(* Main interface *)
structure Main :> MAIN = struct
-open Ast
+open Ast Print
+
+structure SM = StringMap
val dmy = ErrorMsg.dummyLoc
-val tInit = (TAction ((CRoot, dmy),
- StringMap.empty,
- StringMap.empty),
- dmy)
+val defaultT : record ref = ref SM.empty
+val defaultV : (unit -> exp) SM.map ref = ref SM.empty
+
+fun registerDefault (name, t, v) =
+ case SM.find (!defaultT, name) of
+ NONE => (defaultT := SM.insert (!defaultT, name, t);
+ defaultV := SM.insert (!defaultV, name, v))
+ | SOME _ => raise Fail "Duplicate default environment variable"
+
+fun tInit () = (TAction ((CRoot, dmy),
+ !defaultT,
+ StringMap.empty),
+ dmy)
+
+
-fun check fname =
+fun check' G fname =
let
+ (*val _ = print ("Check " ^ fname ^ "\n")*)
val prog = Parse.parse fname
in
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 G' = Tycheck.checkFile Tycheck.empty tInit prog
+ 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') =>
+ if !ErrorMsg.anyErrors then
+ ()
+ else
+ Eval.exec (SM.map (fn f => f ()) (!defaultV)) body'
+ | NONE => ()
+
end