Fix SortedSet to ensure objects comparable with <=>

0001-Fix-SortedSet-to-ensure-objects-comparable-with.patch

From 9c168445300c6fda62173d37fbbbffa1a2136e03 Mon Sep 17 00:00:00 2001
From: Aviv Ben-Yosef <aviv.by@gmail.com>
Date: Wed, 8 Jun 2011 11:10:11 +0300
Subject: [PATCH] Fix SortedSet to ensure objects comparable with <=>

Fixes 2 failing specs for SortedSet:
- SortedSet#add takes only values which responds <=>
- SortedSet#initialize takes only values which respond to <=>
---
 lib/set.rb |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/lib/set.rb b/lib/set.rb
index d110742..8f23443 100644
--- a/lib/set.rb
+++ b/lib/set.rb
@@ -460,6 +460,7 @@ class SortedSet < Set
   end
 
   def add(o)
+    raise ArgumentError, "value must respond to <=>" unless o.respond_to?(:<=>)
     @keys = nil
     @hash[o] = true
     self
-- 
1.7.4.4