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authorknu <knu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2009-05-07 17:32:48 +0000
committerknu <knu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2009-05-07 17:32:48 +0000
commit77b04fb6d55dc7b0b151e71f7698b612cc6028f3 (patch)
tree984f32a4272a8f871d2289f7d373971a86bea81c /lib/set.rb
parenta0901920325eddda423babfa3976554c244e6616 (diff)
* lib/set.rb (SortedSet#add): Do not require each newly added
element to be Comparable but to respond to <=>. [ruby-dev:38371] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23363 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'lib/set.rb')
-rw-r--r--lib/set.rb8
1 files changed, 4 insertions, 4 deletions
diff --git a/lib/set.rb b/lib/set.rb
index 6d298d3..8f2bef9 100644
--- a/lib/set.rb
+++ b/lib/set.rb
@@ -456,8 +456,8 @@ end
# yielded in sorted order (according to the return values of their
# #<=> methods) when iterating over them.
#
-# All elements that are added to a SortedSet must include the
-# Comparable module.
+# All elements that are added to a SortedSet must respond to the <=>
+# method for comparison.
#
# Also, all elements must be <em>mutually comparable</em>: <tt>el1 <=>
# el2</tt> must not return <tt>nil</tt> for any elements <tt>el1</tt>
@@ -506,7 +506,7 @@ class SortedSet < Set
end
def add(o)
- o.is_a?(Comparable) or raise ArgumentError, "value must be comparable"
+ o.respond_to?(:<=>) or raise ArgumentError, "value must repond to <=>"
super
end
alias << add
@@ -529,7 +529,7 @@ class SortedSet < Set
end
def add(o)
- o.is_a?(Comparable) or raise ArgumentError, "value must be comparable"
+ o.respond_to?(:<=>) or raise ArgumentError, "value must respond to <=>"
@keys = nil
super
end