From: Lucas Bajolet <r4pass@hotmail.com>
Date: Thu, 5 Jun 2014 14:44:28 +0000 (-0400)
Subject: lib/standard/ropes: Adapted chars method and related class to Ropes.
X-Git-Tag: v0.6.6~43^2~9
X-Git-Url: http://nitlanguage.org

lib/standard/ropes: Adapted chars method and related class to Ropes.

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

diff --git a/lib/standard/ropes.nit b/lib/standard/ropes.nit
index b1aad2e..37ac23e 100644
--- a/lib/standard/ropes.nit
+++ b/lib/standard/ropes.nit
@@ -224,6 +224,8 @@ class RopeString
 
 	redef fun empty do return once new RopeString.from("")
 
+	redef var chars: SequenceRead[Char] = new RopeStringChars(self)
+
 	redef fun reversed
 	do
 		var ret = empty.as(RopeString)
@@ -398,6 +400,27 @@ class RopeString
 	end
 end
 
+private class RopeStringChars
+	super SequenceRead[Char]
+
+	var tgt: Rope
+
+	redef fun [](pos)
+	do
+		assert pos < tgt.length
+		var path = tgt.node_at(pos)
+		return path.leaf.str.chars[path.offset]
+	end
+
+	redef fun iterator do return iterator_from(0)
+
+	redef fun iterator_from(pos) do return new RopeCharIterator(tgt, pos)
+
+	redef fun reverse_iterator do return reverse_iterator_from(tgt.length-1)
+
+	redef fun reverse_iterator_from(pos) do return new ReverseRopeCharIterator(tgt, pos)
+end
+
 # Used to iterate on a Rope
 private class IteratorElement