diff options
Diffstat (limited to 'include/djinterop/optional.hpp')
| -rw-r--r-- | include/djinterop/optional.hpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/djinterop/optional.hpp b/include/djinterop/optional.hpp index 6795913..baf4773 100644 --- a/include/djinterop/optional.hpp +++ b/include/djinterop/optional.hpp @@ -21,7 +21,7 @@ #include <djinterop/config.hpp> -#ifdef DJINTEROP_STD_OPTIONAL +#if defined DJINTEROP_STD_OPTIONAL #include <optional> @@ -39,7 +39,8 @@ using std::optional; } // namespace stdx } // namespace djinterop -#elif DJINTEROP_STD_EXPERIMENTAL_OPTIONAL +#elif defined DJINTEROP_STD_EXPERIMENTAL_OPTIONAL + #include <experimental/optional> namespace djinterop @@ -57,7 +58,9 @@ using std::experimental::optional; } // namespace djinterop #else + #error This library requires support for optional<T>, but none was found + #endif #endif // DJINTEROP_OPTIONAL_HPP |