z := x AND y is a bitwise AND
(not (foldhiddenmask or currentfoldhiddenmask))
results in
dec: -193 hex: ffff ff3f bin: 1111 1111 1111 1111 1111 1111 0011 1111
this AND hex: $ff (bin: 11111 1111) gives
bin: 1111 1111 1111 1111 1111 1111 0011 1111
AND
bin: 0000 0000 0000 0000 0000 0000 1111 1111
--------------------------------------------------------------------
bin: 0000 0000 0000 0000 0000 0000 0011 1111
the result now definitely fits in a byte
The operators NOT, AND, OR, XOR (applied to integers) should be mentioned
somewhere in the documentation, maybe the explanation there is clearer
----- Original Message -----
From: "fredvs via fpc-pascal" <fpc-pascal@lists.freepascal.org>
To: <fpc-pascal@lists.freepascal.org>
Cc: "fredvs" <fi...@hotmail.com>
Sent: Tuesday, March 24, 2020 8:59 PM
Subject: Re: [fpc-pascal] Range check error warning.
what about
foldlevelmask = (not (foldhiddenmask or currentfoldhiddenmask)) and $ff ;
Ha, this one fpc 3.3.1 like it!
No more warning nor error.
May I ask you what "and $ff" does, is it the same as "abs()" or keep it
the
negative value?
Many thanks.
Fre;D
-----
Many thanks ;-)
--
Sent from: http://free-pascal-general.1045716.n5.nabble.com/
_______________________________________________
fpc-pascal maillist - fpc-pascal@lists.freepascal.org
https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
_______________________________________________
fpc-pascal maillist - fpc-pascal@lists.freepascal.org
https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
