-
Paul Eggert authored
Use macros like FOR_EACH_TAIL instead of maybe_quit to catch list cycles automatically instead of relying on the user becoming impatient and typing C-g (Bug#25606). * src/fns.c (Flength, Fmember, Fmemq, Fmemql, Fassq, Fassoc, Frassq) (Frassoc, Fdelete, Freverse): Use FOR_EACH_TAIL instead of maybe_quit. (Fnreverse): Use simple EQ to check for circular list instead of rarely_quit, as this suffices in this unusual case. (Fplist_put, Flax_plist_put, Flax_plist_put): Use FOR_EACH_TAIL_CONS instead of maybe_quit. (internal_equal): Use FOR_EACH_TAIL_CONS to check lists, instead of by-hand tail recursion that did not catch cycles. * src/fns.c (Fsafe_length, Fplist_get): * src/xdisp.c (display_mode_element): Use FOR_EACH_TAIL_SAFE instead of by-hand Floyd’s algorithm. * src/lisp.h (QUIT_COUNT_HEURISTIC): Remove; no longer needed. (rarely_quit): Simply count toward USHRT_MAX + 1, since the fancier versions are no longer needed. (FOR_EACH_TAIL_CONS, FOR_EACH_TAIL_SAFE) (FOR_EACH_TAIL_INTERNAL): New macros, the last with definiens mostly taken from FOR_EACH_TAIL. (FOR_EACH_TAIL): Rewrite in terms of FOR_EACH_TAIL_INTERNAL.
14dd9101