I think it's just a documentation error: it should say “limits” instead of “bounds” in the manual.
| ?- fd_domain(X, 1, 5), fd_labeling(X, [value_method(limits)]). X = 1 ? ; X = 5 ? ; X = 2 ? ; X = 4 ? ; X = 3 (1 ms) yes | ?- best -spa > On 21 Aug 2022, at 12:46, one_of_us <[email protected]> wrote: > > o@Kiki:~/prolog$ uname -a > Linux Kiki 5.10.0-17-amd64 #1 SMP Debian 5.10.136-1 (2022-08-13) x86_64 > GNU/Linux > > --------------- > o@Kiki:~/prolog$ gprolog --version > Prolog top-Level (GNU Prolog) 1.4.5 > By Daniel Diaz > Copyright (C) 1999-2020 Daniel Diaz > > GNU Prolog comes with ABSOLUTELY NO WARRANTY. > This is free software; see the source or the file > named COPYING for copying conditions. > > --------------- > o@Kiki:~/prolog$ gprolog > GNU Prolog 1.4.5 (64 bits) > Compiled Feb 23 2020, 20:14:50 with gcc > By Daniel Diaz > Copyright (C) 1999-2020 Daniel Diaz > | ?- fd_domain( [X], 1, 5 ), fd_labeling( [X], [value_method(middle)] ). > X = 2 ? a > X = 3 > X = 1 > X = 4 > X = 5 > yes > | ?- fd_domain( [X], 1, 5 ), fd_labeling( [X], [value_method(bounds)] ). > uncaught exception: > error(domain_error(fd_labeling_option,value_method(bounds)),fd_labeling/2) > | ?- > >
