message: das.cli: Simplify by auto'ing return type.
diff: @@ -541,22 +541,6 @@ namespace das
  std::vector<std::string>& args,
  Options const& opts,
  int& counter)
  - -> decltype(CLI<Tail...>::value(
  - p, f,
  - std::tuple_cat(
  - std::move(parsed),
  - std::declval<std::tuple<
  - _details::Value<
  - Head,
  - std::conditional_t<
  - D::template default_for<
  - das::named::make_formal<Head>>::has,
  - typename D::template default_for<
  - das::named::make_formal<Head>>::type,
  - void>>>>()),
  - args,
  - opts,
  - counter))
  {
  ELLE_LOG_COMPONENT("das.cli");
  using Formal = das::named::make_formal<Head>;
  