Class test_string

test/compile-test.cc:349–354

     (FMT_MSC_VERSION >= 1928 && FMT_MSC_VERSION < 1930)) && \
    defined(__cpp_lib_is_constant_evaluated)
template <size_t max_string_length, typename Char = char> struct test_string {
  template <typename T> constexpr auto operator==(const T& rhs) const -> bool {
    return fmt::basic_string_view<Char>(rhs).compare(buffer) == 0;
  }
  Char buffer[max_string_length]{};
};

template <size_t max_string_length, typename Char = char, typename... Args>
consteval auto test_format(auto format, const Args&... args) {