X-Git-Url: https://git.distorted.org.uk/~mdw/fringe/blobdiff_plain/2bd37ef118cb1e41cb0e9e2332a9eb69ac2f2df4..721cfbbbd06a1b4ce05fcc279d9b3d94adc461da:/icon-fringe.icn

diff --git a/icon-fringe.icn b/icon-fringe.icn
index b32dbb7..8f9a0a0 100644
--- a/icon-fringe.icn
+++ b/icon-fringe.icn
@@ -50,8 +50,8 @@ record node(left, data, right)
 procedure fringe(node)
   ## Generate the elements of the tree headed by NODE inorder.
 
-  if /node then fail
-  suspend fringe(node.left) | node.data | fringe(node.right)
+  if \node then
+    suspend fringe(node.left) | node.data | fringe(node.right)
 end
 
 procedure scan_tree()
@@ -60,14 +60,15 @@ procedure scan_tree()
 
   local data, left, right
 
-  if ="(" then {
+  if not ="(" then
+    return &null
+  else {
     left := scan_tree()
     data := move(1) | bail("no data")
     right := scan_tree()
     =")" | bail("missing )")
     return node(left, data, right)
-  } else
-    return &null
+  }
 end
 
 procedure parse_tree(string)