[ox/std] Add std::construct_at

(synced from cf7f9b9088)

src/ox/std/memory.hpp

@@ -28,6 +28,11 @@ struct allocator {
 	}
 };
 
+template<typename T, typename... Args>
+constexpr T *construct_at(T *p, Args &&...args ) {
+	return new (p) T(ox::forward<Args>(args)...);
+}
+
 }
 
 #endif