From 7b1a63185a1a64bfdae4bde4f3ce1d6cdd70062e Mon Sep 17 00:00:00 2001
From: Lucas Bajolet <r4pass@hotmail.com>
Date: Thu, 5 Jun 2014 10:30:00 -0400
Subject: [PATCH] lib/standard/ropes: Added a final forward iterator on the
 chars.

Signed-off-by: Lucas Bajolet <r4pass@hotmail.com>
---
 lib/standard/ropes.nit |   44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/lib/standard/ropes.nit b/lib/standard/ropes.nit
index 9da5d60..f4221b0 100644
--- a/lib/standard/ropes.nit
+++ b/lib/standard/ropes.nit
@@ -477,3 +477,47 @@ class SubstringsIterator
 
 end
 
+class RopeCharIterator
+	super IndexedIterator[Char]
+
+	var substrings: IndexedIterator[Text]
+
+	var pos: Int
+
+	var max: Int
+
+	var substr_iter: IndexedIterator[Char]
+
+	init(tgt: Rope, from: Int)
+	do
+		substrings = tgt.substrings_from(from)
+		max = tgt.length - 1
+		if not substrings.is_ok then
+			pos = tgt.length
+			return
+		end
+		pos = from
+		substr_iter = substrings.item.chars.iterator
+	end
+
+	redef fun item do return substr_iter.item
+
+	redef fun is_ok do return pos <= max
+
+	redef fun index do return pos
+
+	redef fun next
+	do
+		pos += 1
+		if substr_iter.is_ok then
+			substr_iter.next
+		end
+		if not substr_iter.is_ok then
+			substrings.next
+			if substrings.is_ok then
+				substr_iter = substrings.item.chars.iterator
+			end
+		end
+	end
+end
+
-- 
1.7.9.5