On Sat, 8 Dec 2018 20:38:23 +0100 Mattias Gaertner via fpc-pascal <fpc-pascal at lists.freepascal.org> wrote: > Hi, > > According to the docs, the "is" operator is fourth level, the "and" is > second level, so the "and" must be computed before the "is". Link: https://www.freepascal.org/docs-html/ref/refch12.html Mattias