Python has it: 'del' C++11 has it, as long as your intermediate thing is not a parameter: auto real_var = []() { complicated lambda; return calculated_value; }

Python has it: 'del' C++11 has it, as long as your intermediate thing is not a parameter: auto real_var = []() { complicated lambda; return calculated_value; }(); I'm sure someone will figure out how to polyfill it into javascript ;-)