Difference between chanend c_test and chanend? c_test Topic is solved

[Dohny]

Hi,

sorry for this question, but I haven't seen it documented anywhere. In arguments of tasks in XC I see a lot of chanend c_test, but also chanend? c_test or chanend ?c_test. What is the difference between them? Are the ones with a question-mark passing pointer or something like that?

Thank you.

[akp]

they're nullable... you can pass it null

[infiniteimprobability]

akp is right..

Some docs here:

https://www.xmos.com/published/how-use-nullable-types

[Dohny]

Great, thanks.