Method: Lisp::PrimEnvironment.environment_parent_impl

Defined in:
lib/rubylisp/prim_environment.rb

.environment_parent_impl(args, env) ⇒ Object 



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# File 'lib/rubylisp/prim_environment.rb', line 155

def self.environment_parent_impl(args, env)
  return Lisp::Debug.process_error("environment-parent requires an environment for it's argument, received: #{args.car}", env) unless args.car.environment?
  e = args.car.value
  e.parent.nil? ? nil : Lisp::Environment.with_value(e.parent)
end