is not an lvalue and cannot be modified ```d public bool add( ref classTickerID robjTickerID,ref classExchanges robjExchanges = null /// needing this optional
) {
} ```If I take out the null then the parameter is assumed mandatory of course.
someone via Digitalmars-d-learn Sat, 17 Jul 2021 13:50:47 -0700
is not an lvalue and cannot be modified ```d public bool add( ref classTickerID robjTickerID,ref classExchanges robjExchanges = null /// needing this optional
) {
} ```If I take out the null then the parameter is assumed mandatory of course.