Add bin and edit workflow

bin/gems/eventmachine-1.2.7/lib/em/future.rb

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+#--
+#
+# Author:: Francis Cianfrocca (gmail: blackhedd)
+# Homepage::  http://rubyeventmachine.com
+# Date:: 16 Jul 2006
+# 
+# See EventMachine and EventMachine::Connection for documentation and
+# usage examples.
+#
+#----------------------------------------------------------------------------
+#
+# Copyright (C) 2006-07 by Francis Cianfrocca. All Rights Reserved.
+# Gmail: blackhedd
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of either: 1) the GNU General Public License
+# as published by the Free Software Foundation; either version 2 of the
+# License, or (at your option) any later version; or 2) Ruby's License.
+# 
+# See the file COPYING for complete licensing information.
+#
+#---------------------------------------------------------------------------
+#
+# 
+
+#--
+# This defines EventMachine::Deferrable#future, which requires
+# that the rest of EventMachine::Deferrable has already been seen.
+# (It's in deferrable.rb.)
+
+module EventMachine
+    module Deferrable
+
+      # A future is a sugaring of a typical deferrable usage.
+      #--
+      # Evaluate arg (which may be an expression or a block).
+      # What's the class of arg?
+      # If arg is an ordinary expression, then return it.
+      # If arg is deferrable (responds to :set_deferred_status),
+      # then look at the arguments. If either callback or errback
+      # are defined, then use them. If neither are defined, then
+      # use the supplied block (if any) as the callback.
+      # Then return arg.
+      def self.future arg, cb=nil, eb=nil, &blk
+        arg = arg.call if arg.respond_to?(:call)
+
+        if arg.respond_to?(:set_deferred_status)
+          if cb || eb
+            arg.callback(&cb) if cb
+            arg.errback(&eb) if eb
+          else
+            arg.callback(&blk) if blk
+          end
+        end
+
+        arg
+      end
+
+    end
+end
+