# File lib/templater/core_ext/kernel.rb, line 3 def instance_exec(*args, &block) mname = "__instance_exec_#{Thread.current.object_id.abs}_#{object_id.abs}" Object.class_eval{ define_method(mname, &block) } begin ret = send(mname, *args) ensure Object.class_eval{ undef_method(mname) } rescue nil end ret end