From: Alexandre Terrasa <alexandre@moz-code.org>
Date: Mon, 24 Nov 2014 18:44:23 +0000 (-0500)
Subject: range: implements `==` method on ranges
X-Git-Tag: v0.6.11~16^2~3
X-Git-Url: http://nitlanguage.org

range: implements `==` method on ranges

Signed-off-by: Alexandre Terrasa <alexandre@moz-code.org>
---

diff --git a/lib/standard/collection/range.nit b/lib/standard/collection/range.nit
index 27dd3f4..665b263 100644
--- a/lib/standard/collection/range.nit
+++ b/lib/standard/collection/range.nit
@@ -95,6 +95,20 @@ class Range[E: Discrete]
 		last = to.predecessor(1)
 		after = to
 	end
+
+	# Two ranges are equals if they have the same first and last elements.
+	#
+	#     var a = new Range[Int](10, 15)
+	#     var b = new Range[Int].without_last(10, 15)
+	#     assert a == [10..15]
+	#     assert a == [10..16[
+	#     assert not a == [10..15[
+	#     assert b == [10..15[
+	#     assert b == [10..14]
+	#     assert not b == [10..15]
+	redef fun ==(o) do
+		return o isa Range[E] and self.first == o.first and self.last == o.last
+	end
 end
 
 private class IteratorRange[E: Discrete]