stl: undef internal macros

src/entt/stl/functional.hpp

@@ -48,4 +48,6 @@ struct identity {
 #endif
 /*! @endcond */
 
+#undef ENTT_HAS_IDENTITY
+
 #endif

src/entt/stl/iterator.hpp

@@ -101,4 +101,6 @@ concept sentinel_for = input_or_output_iterator<It> && requires(Sentinel sentine
 } // namespace entt::stl
 /*! @endcond */
 
+#undef ENTT_HAS_ITERATOR_CONCEPTS
+
 #endif

src/entt/stl/memory.hpp

@@ -66,4 +66,6 @@ constexpr auto to_address(const Type &ptr) noexcept {
 #endif
 /*! @endcond */
 
+#undef ENTT_HAS_TO_ADDRESS
+
 #endif