On Sun, Nov 13, 2022 at 02:15:43AM +0000, jbranso--- via Bug reports for GUILE, GNU's Ubiquitous Extension Language wrote: > November 12, 2022 12:58 PM, "Jean Abou Samra" <j...@abou-samra.fr> wrote: > > >> Le 12 nov. 2022 à 18:50, Joshua Branson via Bug reports for GUILE, GNU's > >> Ubiquitous Extension > >> Language <bug-guile@gnu.org> a écrit : > >> > >> Hello you lovely guile people! > >> > >> This bug is so simple the subject line says it all!
[file-exists? raises exception on #f] [...] > > It is normal for predicates to be defined only on certain types. You will > > find the same with > > positive?, string-null? and the like. > > Perhaps I am just being really pedantic. I asked in the #guile irc chat if a > predicate should > be able to raise an exception. The answer I was given was no. You both have a point. Checking for existing predicates with a longer tradition, though: scheme@(guile-user)> (exact? "mumble") ice-9/boot-9.scm:1685:16: In procedure raise-exception: In procedure exact?: Wrong type argument in position 1: "mumble" seems to support Jean Abu's position that it is more customary to raise for an argument of the wrong type. Also `string<?', etc. do this. That seems to be the consensus. Cheers -- t
signature.asc
Description: PGP signature
