[fpc-pascal] Can I define a custom simple type for my applications?
Hi, I need a new boolean type in my applications that support three values. True, False and Null. Null value means undefined and has various uses and gets handled differently to True or False. Is this possible in Free Pascal? Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
type TGraemeBoolean = (dbNil, dbFalse, dbTrue); ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
On Mon, 6 Apr 2009 19:21:50 +0200 Graeme Geldenhuys graemeg.li...@gmail.com wrote: Hi, I need a new boolean type in my applications that support three values. True, False and Null. Null value means undefined and has various uses and gets handled differently to True or False. Is this possible in Free Pascal? TGraemeBoolean = (gbNull, gbTrue, gbFalse); Mattias ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
oh sorry, by i've missprinted prefixes: type TGraemeBoolean = (gbNil, gbFalse, gbTrue); // gb prefix stands for Greame Boolean ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
On Mon, Apr 6, 2009 at 7:33 PM, dmitry boyarintsev skalogryz.li...@gmail.com wrote: TGraemeBoolean = (gbNull = -1, gbFalse = 0, gbTrue =1); function dbBool(g: TGrameBoolean): Boolean; inline; function dbAssigned(gTGrameBoolean): Boolean; inline; Dope! Now why didn't I think of that. :-) Thank you very much! Regards, - Graeme - ___ fpGUI - a cross-platform Free Pascal GUI toolkit http://opensoft.homeip.net/fpgui/ ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
In our previous episode, Graeme Geldenhuys said: TGraemeBoolean = (gbNull = -1, gbFalse = 0, gbTrue =1); function dbBool(g: TGrameBoolean): Boolean; inline; function dbAssigned(gTGrameBoolean): Boolean; inline; Dope! Now why didn't I think of that. :-) Thank you very much! Have a look at $packenum btw if you go that way. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
Have a look at $packenum btw if you go that way. what's the reason? i guess it's not to be used for streaming operation. btw, is there $packsets? (for sets aligment?) thanks, dmitry ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
In our previous episode, dmitry boyarintsev said: Have a look at $packenum btw if you go that way. what's the reason? i guess it's not to be used for streaming operation. Well, you never know. Shared memory is another possibility btw. btw, is there $packsets? (for sets aligment?) No, not that I know. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
No, not that I know. sets are always 32-bit size? ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
In our previous episode, dmitry boyarintsev said: No, not that I know. sets are always 32-bit size? Oops I apparantly looked at outdated docs (on scenergy): http://www.freepascal.org/docs-html/prog/progsu59.html#x66-640001.1.59 ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
Oops I apparantly looked at outdated docs (on scenergy): http://www.freepascal.org/docs-html/prog/progsu59.html#x66-640001.1.59 Thanks so much! ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Can I define a custom simple type for my applications?
On 06 Apr 2009, at 22:08, Marco van de Voort wrote:
Oops I apparantly looked at outdated docs (on scenergy):
http://www.freepascal.org/docs-html/prog/progsu59.html#x66-640001.1.59
That documentation is not really complete. The supported settings are:
* FIXED, DEFAULT, NORMAL: the default behaviour, and behaves as
described in the docs.
* 1, 2, 4: the set size depends on both the low and high value of the
set element type (e.g., a set of 16..23 will be 1 byte in case of
{$packset 1}), with
a) the lower bound rounded down to a multiple of the packset setting
expressed in bits
b) the upper bound rounded up to 'a multiple of the packset setting
(in bits)' minus 1 (e.g., 24 is a multiple of 8 bits in the above
example - -1 = 23)
c) if the set size would be 3 bytes after the above calculation, it's
changed to 4 bytes
d) if the set size would be greater than 4 bytes after the above
calculation, it's changed to 32 bytes.
* {$packset 8} is also supported, but kind of nonsensical in the
current implementation (will always be rounded up to 32 byte, since
the set size will always be 4).
Jonas
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