[fpc-pascal] LongBool True = -1

[Sven Barth]

Dmitry Boyarintsev <skalogryz.lists at gmail.com> schrieb am So., 20. Mai
2018, 04:38:

> On Thu, May 17, 2018 at 5:26 PM, Anthony Walter <sysrpl at gmail.com> wrote:
>
>> I am working with some a glib library that expects gboolean to be
>> positive 1 for true, yet FPC emits -1 for true.
>>
>
> I'd think that pascal defines true as
>   true = not false;
> In case of unsigned integers "-1" is not an option
>

FPC defines True as 1 for Boolean, Boolean16, Boolean32 and Boolean64 and
as "-1" aka "all bits 1" for Byte Book, WordBool, LongBool and QWordBool.

And for unsigned integers "-1" is converted to "all bits 1" as well though
one needs to use a typecast (see the declaration of INVALID_HANDLE_VALUE
for example).

Regards,
Sven
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