--- a/src/basics.h	Tue Jun 28 19:43:55 2022 +0300
+++ b/src/basics.h	Tue Jun 28 19:47:34 2022 +0300
@@ -46,6 +46,9 @@
 //! \brief Return type of qHash. unsigned int on Qt5, unsigned long on Qt6.
 using hash_t = decltype(qHash(0));
 
+//! \brief Index type of QVector, int on Qt5, qsizetype on Qt6
+using index_t = QVector<int>::size_type;
+
 Q_DECLARE_METATYPE(glm::vec3)
 Q_DECLARE_METATYPE(glm::mat4)