X-Git-Url: https://git.hcoop.net/hcoop/domtool2.git/blobdiff_plain/dac62e84b324d2187ec9b9882efa47125d5599a4..2ed6d0e50d89234c3d63c3707e855c922bd49358:/src/main.sml

diff --git a/src/main.sml b/src/main.sml
index 7740522..59a76d5 100644
--- a/src/main.sml
+++ b/src/main.sml
@@ -22,71 +22,113 @@ structure Main :> MAIN = struct
 
 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 : 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
-	    let
-		val G' = Tycheck.checkFile Env.empty tInit prog
-	    in
-		()
-	    end
+	    Tycheck.checkFile G (tInit ()) prog
     end
 
-fun reduce fname =
+fun basis () =
     let
-	val prog = Parse.parse fname
+	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
-	    let
-		val G' = Tycheck.checkFile Env.empty tInit prog
-	    in
-		if !ErrorMsg.anyErrors then
-		    ()
-		else
-		    case prog 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']))
-			end
-		      | _ => ()
-	    end
+	    foldl (fn (fname, G) => check' G fname) Env.empty files
     end
 
-fun eval fname =
+fun check fname =
     let
-	val prog = Parse.parse fname
+	val _ = ErrorMsg.reset ()
+
+	val b = basis ()
     in
 	if !ErrorMsg.anyErrors then
-	    ()
+	    (b, NONE)
 	else
 	    let
-		val G' = Tycheck.checkFile Env.empty tInit prog
+		val prog = Parse.parse fname
 	    in
 		if !ErrorMsg.anyErrors then
-		    ()
+		    (Env.empty, NONE)
 		else
-		    case prog of
-			(_, SOME body) => Eval.exec StringMap.empty body
-		      | _ => ()
+		    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 (!defaultV) body'
+      | NONE => ()
+
 end