X-Git-Url: https://git.hcoop.net/hcoop/domtool2.git/blobdiff_plain/6bb366c5a60247419dce5cbce4a5c034fa2f1e5c..76405e1e2e13a95cdb4accd6af014ee21eed2c57:/src/order.sml

diff --git a/src/order.sml b/src/order.sml
index 0d0d363..08db062 100644
--- a/src/order.sml
+++ b/src/order.sml
@@ -111,7 +111,11 @@ fun expNeeded G (e, loc) =
 
       | ESkip => empty
       | ESet (_, e) => expNeeded G e
-      | EGet (x, _, e) => expNeeded (Env.bindVal G (x, dt, NONE)) e
+      | EGet (x, topt, _, e) =>
+	(case topt of
+	     NONE => expNeeded (Env.bindVal G (x, dt, NONE)) e
+	   | SOME t => unionCTE ((typNeeded G t, SS.empty),
+				 expNeeded (Env.bindVal G (x, dt, NONE)) e))
       | ESeq es => foldl (fn (e, ss) => unionCTE (ss, expNeeded G e))
 		   empty es
       | ELocal (e1, e2) => unionCTE (expNeeded G e1, expNeeded G e2)
@@ -159,23 +163,33 @@ fun printSig ((cs, ts), vs) =
      SS.app (fn s => (print " "; print s; print ";")) vs;
      print "\n")
 
+val allNaughty = ref false
+val naughtyFiles = ref SS.empty
+fun addNaughty fname = naughtyFiles := SS.add (!naughtyFiles, fname)
+
 fun mergeProvide kind fname (m1, m2) =
     SS.foldl (fn (name, provide) =>
 		 (case SM.find (provide, name) of
 		      NONE => ()
-		    | SOME fname' => ErrorMsg.error NONE (String.concat ["Files ",
-									 fname',
-									 " and ",
-									 fname,
-									 " both provide ",
-									 kind,
-									 " ",
-									 name]);
+		    | SOME fname' =>
+		      (addNaughty fname;
+		       addNaughty fname';
+		       ErrorMsg.error NONE (String.concat ["Files ",
+							   fname',
+							   " and ",
+							   fname,
+							   " both provide ",
+							   kind,
+							   " ",
+							   name]));
 		  SM.insert (provide, name, fname)))
     m1 m2
 
-fun order fnames =
+fun order basisOpt fnames =
     let
+	val () = allNaughty := false
+	val () = naughtyFiles := SS.empty
+
 	fun doFile (fname, (provideC, provideT, provideV, require)) =
 	    let
 		val file = Parse.parse fname
@@ -193,25 +207,39 @@ fun order fnames =
 
 	val require = SM.mapi (fn (fname, ((rc, rt), rv)) =>
 				  let
-				      fun consider (kind, provide) =
+				      fun consider (kind, provide, lastChance) =
 					  SS.foldl (fn (name, need) =>
 						       case SM.find (provide, name) of
-							   NONE => (ErrorMsg.error NONE
-								    ("File "
-								     ^ fname
-								     ^ " uses undefined "
-								     ^ kind
-								     ^ " "
-								     ^ name);
-								    need)
+							   NONE =>
+							   if lastChance name then
+							       need
+							   else
+							       (addNaughty fname;
+								ErrorMsg.error NONE
+									       ("File "
+										^ fname
+										^ " uses undefined "
+										^ kind
+										^ " "
+										^ name);
+								need)
 							 | SOME fname' =>
 							   SS.add (need, fname'))
 
-				      val need = consider ("context", provideC)
+				      val need = consider ("context", provideC,
+							   case basisOpt of
+							       NONE => (fn _ => false)
+							     | SOME b => Env.lookupContext b)
 							  SS.empty rc
-				      val need = consider ("type", provideT)
+				      val need = consider ("type", provideT,
+							   case basisOpt of
+							       NONE => (fn _ => false)
+							     | SOME b => Env.lookupType b)
 							  need rt
-				      val need = consider ("value", provideV)
+				      val need = consider ("value", provideV,
+							   case basisOpt of
+							       NONE => (fn _ => false)
+							     | SOME b => (fn name => Option.isSome (Env.lookupVal b name)))
 							  need rv
 				  in
 				      need
@@ -223,7 +251,8 @@ fun order fnames =
 		if SM.numItems waiting = 0 then
 		    rev order
 		else
-		    (ErrorMsg.error NONE "Cyclic dependency in source files";
+		    (allNaughty := true;
+		     ErrorMsg.error NONE "Cyclic dependency in source files";
 		     order)
 	      | SOME next =>
 		let
@@ -254,21 +283,18 @@ fun order fnames =
 			      (ready,
 			       SM.insert (waiting, fname, requires)))
 		      (SS.empty, SM.empty) require
-    in
-	(*SM.appi (fn (name, fname) => print ("Context " ^ name ^ " in " ^ fname ^ "\n")) provideC;
-	SM.appi (fn (name, fname) => print ("Type " ^ name ^ " in " ^ fname ^ "\n")) provideT;
-	SM.appi (fn (name, fname) => print ("Value " ^ name ^ " in " ^ fname ^ "\n")) provideV;*)
 
-	(*SM.appi (fn (fname, requires) =>
-		    (print fname;
-		     print " requires:";
-		     SS.app (fn fname' => (print " "; print fname')) requires;
-		     print "\n")) require;*)
-
-	({provideC = provideC,
-	  provideT = provideT,
-	  provideV = provideV},
-	 loop (ready, waiting, []))
+	val ordered = loop (ready, waiting, [])
+	val provider = {provideC = provideC,
+			provideT = provideT,
+			provideV = provideV}
+    in
+	if !allNaughty then
+	    (provider, [])
+	else if SS.isEmpty (!naughtyFiles) then
+	    (provider, ordered)
+	else
+	    order basisOpt (List.filter (fn fname => not (SS.member (!naughtyFiles, fname))) fnames)
     end
 
 type providers = {provideC : string SM.map,