+# define assert_vmsg(__expr, __mesg, ...) \
+do \
+{ \
+ if (not (__expr)) \
+ { \
+ size_t ask= snprintf(0, 0, (__mesg), __VA_ARGS__); \
+ ask++; \
+ char *_error_message= (char*)alloca(sizeof(char) * ask); \
+ size_t _error_message_size= snprintf(_error_message, ask, (__mesg), __VA_ARGS__); \
+ fprintf(stderr, "\n%s:%d Assertion '%s' failed for function '%s' [ %.*s ]\n", __FILE__, __LINE__, #__expr, __func__, int(_error_message_size), _error_message);\
+ custom_backtrace(); \
+ abort(); \
+ } \
+} while (0)
+
+#endif // NDEBUG