class Opal::Nodes::RestargNode

def compile
  restarg_name = @sexp[1]
  return unless restarg_name
  var_name = variable(restarg_name.to_sym)
  add_temp var_name
  if @sexp.meta[:post]
    # post restarg case (in mlhs or in deoptimized arguments)
    # splat is always the last item in scope.working_arguments
    line "#{var_name} = #{scope.working_arguments};"
  else
    # inline restarg case
    offset = @sexp.meta[:offset]
    # restarg value should be taken directly from parameters
    line "var $args_len = arguments.length, $rest_len = $args_len - #{offset};"
    line "if ($rest_len < 0) { $rest_len = 0; }"
    line "#{var_name} = new Array($rest_len);"
    line "for (var $arg_idx = #{offset}; $arg_idx < $args_len; $arg_idx++) {"
    line "  #{var_name}[$arg_idx - #{offset}] = arguments[$arg_idx];"
    line "}"
  end
end