+#define %(S)s_FOR_EACH(ROW, IDL) \\
+ for ((ROW) = %(s)s_first(IDL); \\
+ (ROW); \\
+ (ROW) = %(s)s_next(ROW))
+#define %(S)s_FOR_EACH_SAFE(ROW, NEXT, IDL) \\
+ for ((ROW) = %(s)s_first(IDL); \\
+ (ROW) ? ((NEXT) = %(s)s_next(ROW), 1) : 0; \\
+ (ROW) = (NEXT))