Re: [Discuss-gnuradio] XML parameter checking

[Marcus Müller]

Hi Mike,

what's in the <check> tag just needs to be a valid Python expression, 
afaik. So,

$psize % 8 == 0

would work (notice the double =; this is comparison, not assignment!).

For comparison, see the gr-audio/grc/analog_nbfm_rx.xml, for example.

Best regards,

Marcus


On 2017-10-19 04:02, Mike Rex wrote:
> What would be the best way to make sure the user enters a parameter 
> that is a multiple of 8 in the GRC XML file?  My first thought is this 
> might do the trick, but seems there is no mod function for XML.  Any 
> suggestions?
>
> <check>$psize % 8 = 0</check> or <check>$psize mod 8 = 0</check>
>
> Thanks in advance,
> Mike
>
>
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