[Development] Should QVariant be doing fuzzy comparisons on doubles?
Mathias Hasselmann
mathias at taschenorakel.de
Wed Sep 21 11:42:41 CEST 2016
Am 21.09.2016 um 09:52 schrieb Marc Mutz:
> On Wednesday 21 September 2016 09:23:35 Mathias Hasselmann wrote:
>> Maybe some clever use of type traits can tell us if your structs contain
>> alignment wholes?
>
> -Werror=padded :)
>
Yes, but how is it supposed to help? Let me show a real world example:
struct Sensor
{
enum Config { NotInitialized, PullUp, PullDown, Analog };
Config config;
QVariant value; //[1]
}
No matter what order I use for config and value, the compiler will pad
and -Wpadded will complain. How am I supposed to fix this? This
solutions that come to my mind all are ugly, but most likely I am just
stupid.
[1] Yes, the use of QVariant in this case is questionable,
but that's not the point.
Ciao,
Mathias
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