Replace ComparableSet with a Requirements collection

1 files changed, 25 insertions, 0 deletions

diff --git a/Library/Homebrew/dependencies.rb b/Library/Homebrew/dependencies.rb
index 0e0637c81..96a4106b5 100644
--- a/Library/Homebrew/dependencies.rb
+++ b/Library/Homebrew/dependencies.rb
@@ -52,3 +52,28 @@ class Dependencies
   end
   alias_method :eql?, :==
 end
+
+class Requirements
+  include Enumerable
+
+  def initialize(*args)
+    @reqs = Set.new(*args)
+  end
+
+  def each(*args, &block)
+    @reqs.each(*args, &block)
+  end
+
+  def <<(other)
+    if Comparable === other
+      @reqs.grep(other.class) do |req|
+        return self if req > other
+        @reqs.delete(req)
+      end
+    end
+    @reqs << other
+    self
+  end
+
+  alias_method :to_ary, :to_a
+end