template <typename T>
T& format_as(std::reference_wrapper<T> ref) { return ref.get(); }

/mnt/c/Users/rifkin/home/projects/open-source/fmt/include/fmt/base.h: In instantiation of ‘constexpr fmt::v11::detail::value<Context>::value(const T&, fmt::v11::detail::custom_tag) [with T = std::reference_wrapper<int>; typename std::enable_if<(! has_formatter<T, typename Context::char_type>()), int>::type <anonymous> = 0; Context = fmt::v11::context]’:
/mnt/c/Users/rifkin/home/projects/open-source/fmt/include/fmt/base.h:2235:65:   required from ‘fmt::v11::detail::value<Context>::value(T&) [with T = std::reference_wrapper<int>; typename std::enable_if<(std::integral_constant<bool, (((((((std::is_class<T>::value || std::is_enum<T>::value) || std::is_union<T>::value) || std::is_array<T>::value) && (! fmt::v11::detail::has_to_string_view<T, void>::value)) && (! fmt::v11::detail::is_named_arg<T>::value)) && (! fmt::v11::detail::use_format_as<T>::value)) && (! fmt::v11::detail::use_format_as_member<typename std::remove_const<T>::type, std::integral_constant<bool, true> >::value))>::value || (!1)), int>::type <anonymous> = 0; Context = fmt::v11::context]’
/mnt/c/Users/rifkin/home/projects/open-source/fmt/include/fmt/format.h:4200:17:   required from ‘std::string fmt::v11::format(format_string<T ...>, T&& ...) [with T = {std::reference_wrapper<int>}; std::string = std::__cxx11::basic_string<char>; format_string<T ...> = fstring<std::reference_wrapper<int> >]’
/mnt/c/Users/rifkin/home/projects/open-source/fmt/test/std-test.cc:419:3:   required from here
/mnt/c/Users/rifkin/home/projects/open-source/fmt/include/fmt/base.h:2262:45: error: ‘fmt::v11::detail::type_is_unformattable_for<std::reference_wrapper<int>, char> _’ has incomplete type
 2262 |     type_is_unformattable_for<T, char_type> _;
      |                                             ^

/mnt/c/Users/rifkin/home/projects/open-source/fmt/include/fmt/base.h: In substitution of ‘template<class T> using fmt::v11::detail::format_as_result = fmt::v11::remove_cvref_t<decltype (format_as(declval<const T&>()))> [with T = std::reference_wrapper<int>]’:
/mnt/c/Users/rifkin/home/projects/open-source/fmt/test/std-test.cc:421:61:   required from here
/mnt/c/Users/rifkin/home/projects/open-source/fmt/include/fmt/base.h:1115:38: error: ‘format_as’ was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive]
 1115 |     remove_cvref_t<decltype(format_as(std::declval<const T&>()))>;
      |                             ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
/mnt/c/Users/rifkin/home/projects/open-source/fmt/include/fmt/std.h:750:4: note: ‘template<class T> T& format_as(std::reference_wrapper<_Tp>)’ declared here, later in the translation unit
  750 | T& format_as(std::reference_wrapper<T> ref) { return ref.get(); }
      |    ^~~~~~~~~

  static auto format_as(std::reference_wrapper<T> ref) -> T& {
    return ref.get();
  }

  int num = 35;
  fmt::to_string(std::cref(num));

template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value &&
                                    !detail::use_format_as<T>::value)>
FMT_NODISCARD auto to_string(const T& value) -> std::string {
  auto buffer = memory_buffer();
  detail::write<char>(appender(buffer), value);
  return {buffer.data(), buffer.size()};
}