class Sass::Embedded::Host::ValueProtofier

def from_proto(proto)
  oneof = proto.value
  obj = proto.public_send(oneof)
  case oneof
  when :string
    Sass::Value::String.new(
      obj.text,
      quoted: obj.quoted
    )
  when :number
    Sass::Value::Number.new(
      obj.value, {
        numerator_units: obj.numerators.to_a,
        denominator_units: obj.denominators.to_a
      }
    )
  when :rgb_color
    Sass::Value::Color.new(
      red: obj.red,
      green: obj.green,
      blue: obj.blue,
      alpha: obj.alpha
    )
  when :hsl_color
    Sass::Value::Color.new(
      hue: obj.hue,
      saturation: obj.saturation,
      lightness: obj.lightness,
      alpha: obj.alpha
    )
  when :hwb_color
    Sass::Value::Color.new(
      hue: obj.hue,
      whiteness: obj.whiteness,
      blackness: obj.blackness,
      alpha: obj.alpha
    )
  when :argument_list
    Sass::Value::ArgumentList.new(
      obj.contents.map do |element|
        from_proto(element)
      end,
      obj.keywords.entries.to_h do |entry|
        [entry.first, from_proto(entry.last)]
      end,
      ListSeparator.from_proto(obj.separator)
    ).instance_eval do
      @id = obj.id
      self
    end
  when :list
    Sass::Value::List.new(
      obj.contents.map do |element|
        from_proto(element)
      end,
      separator: ListSeparator.from_proto(obj.separator),
      bracketed: obj.has_brackets
    )
  when :map
    Sass::Value::Map.new(
      obj.entries.to_h do |entry|
        [from_proto(entry.key), from_proto(entry.value)]
      end
    )
  when :compiler_function
    Sass::Value::Function.new(obj.id)
  when :host_function
    raise ProtocolError, 'The compiler may not send Value.host_function to host'
  when :singleton
    case obj
    when :TRUE
      Sass::Value::Boolean::TRUE
    when :FALSE
      Sass::Value::Boolean::FALSE
    when :NULL
      Sass::Value::Null::NULL
    else
      raise Sass::ScriptError, "Unknown Value.singleton #{obj}"
    end
  else
    raise Sass::ScriptError, "Unknown Value.value #{obj}"
  end
end