Max Nikulin <maniku...@gmail.com> writes: > On 07/10/2022 03:15, Rudolf Adamkovič wrote: >> >> If I understand, "a" should be less than "B" when under "C" locale when >> ignoring case (nil) , right? Yet, I get the following: >> >> (string-collate-lessp "a" "B" "C" nil) ; => nil > > When case is not ignored (4th argument is nil) locale-dependent > collation rules are used, so you get the expected result. > > $ printf 'a\nB\n' | LC_COLLATE=C sort > B > a > $ printf 'a\nB\n' | LC_COLLATE=en_US.UTF-8 sort > a > B
Should we then modify the test to set locale explicitly? >> [FYI: If I replace nil with t, the procedure returns nil too.] >> >> Tested on Emacs 29 (adaa2fc90e) and Org 9.5.5 (580f28614). > > Strange. Emacs-26, Linux > > (string-collate-lessp "a" "B" "C" t) > t > > If libc is sane (assuming that sort is linked to the same libc) > > printf 'a\nb\n' | LC_COLLATE=C sort > printf 'b\na\n' | LC_COLLATE=C sort > printf 'A\nB\n' | LC_COLLATE=C sort > printf 'B\nA\n' | LC_COLLATE=C sort > printf 'a\nb\n' | LC_COLLATE=C.UTF-8 sort > printf 'b\na\n' | LC_COLLATE=C.UTF-8 sort > printf 'A\nB\n' | LC_COLLATE=C.UTF-8 sort > printf 'B\nA\n' | LC_COLLATE=C.UTF-8 sort > > then you might face an Emacs bug. IDK if it is related, but there was a recent (fixed) bug in https://debbugs.gnu.org/cgi/bugreport.cgi?bug=55787 Note that Rudolf is using Emacs 29. -- Ihor Radchenko // yantar92, Org mode contributor, Learn more about Org mode at <https://orgmode.org/>. Support Org development at <https://liberapay.com/org-mode>, or support my work at <https://liberapay.com/yantar92>
