lib/backports/symbol.rb in backports-1.5.0 vs lib/backports/symbol.rb in backports-1.6.0

@@ -1,6 +1,20 @@
 class Symbol
   # Standard in ruby 1.9. See official documentation[http://ruby-doc.org/core-1.9/classes/Symbol.html]
   def to_proc
     Proc.new { |*args| args.shift.__send__(self, *args) }
   end unless :to_proc.respond_to?(:to_proc)
+
+  include Enumerable
+  
+  [ [%w(<=> casecmp), {:before => "return nil unless args.first.is_a? Symbol" }],
+    [%w(capitalize downcase next succ swapcase upcase), {:after => ".to_s"}],
+    [%w(=~ [] empty? length match size), {}]
+  ].each { |methods, options| methods.each do |method|
+    module_eval <<-end_eval
+      def #{method}(*args)
+        #{options[:before]}
+        to_s.#{method}(*args)#{options[:after]}
+      end unless method_defined? :#{method}
+    end_eval
+  end }
 end