# File lib/sass/tree/visitors/perform.rb, line 230
  def visit_each(node)
    list = node.list.perform(@environment)

    with_environment Sass::SemiGlobalEnvironment.new(@environment) do
      list.to_a.map do |value|
        if node.vars.length == 1
          @environment.set_local_var(node.vars.first, value)
        else
          node.vars.zip(value.to_a) do |(var, sub_value)|
            @environment.set_local_var(var, sub_value || Sass::Script::Value::Null.new)
          end
        end
        node.children.map {|c| visit(c)}
      end.flatten
    end
  end