From: Lucas Bajolet <r4pass@hotmail.com>
Date: Thu, 5 Jun 2014 14:24:56 +0000 (-0400)
Subject: lib/standard/ropes: Preparing introduction of iterators on Rope.
X-Git-Tag: v0.6.6~43^2~20
X-Git-Url: http://nitlanguage.org

lib/standard/ropes: Preparing introduction of iterators on Rope.

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>
---

diff --git a/lib/standard/ropes.nit b/lib/standard/ropes.nit
index 940939d..d1f7398 100644
--- a/lib/standard/ropes.nit
+++ b/lib/standard/ropes.nit
@@ -284,3 +284,25 @@ class RopeString
 	end
 end
 
+# Used to iterate on a Rope
+private class IteratorElement
+
+	init(e: RopeNode)
+	do
+		if e isa Leaf then
+			left = true
+			right = true
+		end
+		node = e
+	end
+
+	# The node being visited
+	var node: RopeNode
+	# If the node has a left child, was it visited ?
+	var left = false
+	# If the node has a right child, was it visited ?
+	var right = false
+	# Was the current node visited ?
+	var done = false
+end
+