renames Typed to Vm

lib/vm/tree/if_statement.rb

@@ -0,0 +1,12 @@
+module Vm
+  module Tree
+    class IfStatement < Statement
+      attr_accessor :branch_type , :condition , :if_true , :if_false
+      def to_s
+        str = "if_#{branch_type}(#{condition}) \n  #{if_true}\n"
+        str += "else\n  #{if_false}\n" if if_false
+        str + "end\n"
+      end
+    end
+  end
+end