Also, you don't need full continuations for this, just continuations with dynamic extent. (E works this way, plus it defines 'return' as syntactic sugar for cal

Also, you don't need full continuations for this, just continuations with dynamic extent. (E works this way, plus it defines 'return' as syntactic sugar for calling the enclosing method's continuation.) Since I don't know much Ruby I'm not sure if its blocks have other advantages.