lib/hyperion/aux/util.rb in hyperion_http-0.1.8 vs lib/hyperion/aux/util.rb in hyperion_http-0.1.9

@@ -12,7 +12,30 @@
 
     def self.guard_param(value, what, expected_type=nil, &pred)
       pred ||= proc { |x| x.is_a?(expected_type) }
       pred.call(value) or fail BugError, "You passed me #{value.inspect}, which is not #{what}"
     end
+
+    # reimplement callcc because ruby has deprecated it
+    def self.callcc()
+      in_scope = true
+      cont = proc do |retval|
+        unless in_scope
+          raise "Cannot invoke this continuation. Control has left this continuation's scope."
+        end
+        raise CallCcError.new(retval)
+      end
+      yield(cont)
+    rescue CallCcError => e
+      e.retval
+    ensure
+      in_scope = false
+    end
+
+    class CallCcError < RuntimeError
+      attr_accessor :retval
+      def initialize(retval)
+        @retval = retval
+      end
+    end
   end
 end