From 73c926bed24e4dabe8efc3acc9b2a892c680bacd Mon Sep 17 00:00:00 2001
From: Jed Barber <jjbarber@y7mail.com>
Date: Thu, 18 Dec 2014 10:15:29 +1100
Subject: IPs changed to be lists of Nodes instead of GNodes

---
 src/Grasp/Monad.hs    | 14 +++++++++-----
 src/Grasp/Types/IP.hs | 14 +++++++-------
 2 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/src/Grasp/Monad.hs b/src/Grasp/Monad.hs
index a79cb20..3a3bd4f 100644
--- a/src/Grasp/Monad.hs
+++ b/src/Grasp/Monad.hs
@@ -86,7 +86,7 @@ construct (ns,es) = do
     Monad.when (noMain ns es) (error "could not find grasp:main")
 
     let graph = Graph.mkGraph (map GN.toLNode ns) (map GE.toLEdge es)
-        ips = map IP.singleton (getNodesWithName ns es "grasp:main")
+        ips = map (IP.singleton . GN.toNode) (getNodesWithName ns es "grasp:main")
         handles = Map.empty
 
     State.put (graph, ips, handles)
@@ -183,7 +183,7 @@ reachable :: Gr Instruction EdgeLabel -> [IP] -> [Node]
 reachable gr ips =
     let named = getNamedNodes (map GN.mk (Graph.labNodes gr)) (map GE.mk (Graph.labEdges gr))
         ipNodes = concatMap IP.toList ips
-        start = (map GN.toNode) . List.nub $ named ++ ipNodes
+        start = List.nub $ (map GN.toNode named) ++ ipNodes
     in reach gr start []
 
 
@@ -258,7 +258,7 @@ updateIP = do
         nexts <- nodesOut (EL.mk "next") (Maybe.fromJust curNode)
         r <- liftIO (Random.getStdRandom (Random.randomR (0, length nexts - 1)))
 
-        let updated = if (length nexts == 0) then IP.empty else IP.shift (nexts !! r) (head ips)
+        let updated = if (length nexts == 0) then IP.empty else IP.shift (GN.toNode (nexts !! r)) (head ips)
             ips' = updated:(tail ips)
 
         State.put (gr, ips', fh) )
@@ -268,7 +268,7 @@ updateIP = do
 pushIP :: GNode -> GraspM ()
 pushIP n = do
     (gr, ips, fh) <- State.get
-    let ips' = if (length ips == 0) then [] else (IP.push n (head ips)):(tail ips)
+    let ips' = if (length ips == 0) then [] else (IP.push (GN.toNode n) (head ips)):(tail ips)
     State.put (gr, ips', fh)
 
 
@@ -284,7 +284,11 @@ popIP = do
 peekIP :: GraspM (Maybe GNode)
 peekIP = do
     (gr, ips, fh) <- State.get
-    if (length ips == 0) then return Nothing else return (IP.peek (head ips))
+    if (length ips == 0) then return Nothing
+        else return (do
+            node <- IP.peek (head ips)
+            label <- Graph.lab gr node
+            return (GN.mk (node, label)) )
 
 
 
diff --git a/src/Grasp/Types/IP.hs b/src/Grasp/Types/IP.hs
index a548cc3..8f7a74f 100644
--- a/src/Grasp/Types/IP.hs
+++ b/src/Grasp/Types/IP.hs
@@ -15,18 +15,18 @@ module Grasp.Types.IP (
 
 
 
-import Grasp.Types.GNode( GNode )
+import Grasp.Graph( Node )
 
 
 
 
-newtype IP = IP [GNode]
+newtype IP = IP [Node]
     deriving (Eq, Show)
 
 
 
 
-singleton :: GNode -> IP
+singleton :: Node -> IP
 singleton n = IP [n]
 
 empty :: IP
@@ -35,18 +35,18 @@ empty = IP []
 isEmpty :: IP -> Bool
 isEmpty (IP p) = (length p == 0)
 
-peek :: IP -> Maybe GNode
+peek :: IP -> Maybe Node
 peek (IP p) = if (length p == 0) then Nothing else Just (head p)
 
-push :: GNode -> IP -> IP
+push :: Node -> IP -> IP
 push n (IP p) = IP (n:p)
 
 pop :: IP -> IP
 pop (IP p) = if (length p == 0) then empty else IP (tail p)
 
-shift :: GNode -> IP -> IP
+shift :: Node -> IP -> IP
 shift n (IP p) = if (length p == 0) then empty else IP (n:(tail p))
 
-toList :: IP -> [GNode]
+toList :: IP -> [Node]
 toList (IP p) = p
 
-- 
cgit