xparse: \NoValue gone -> how to check multiple NoValues now?

Question

I used to have a definition like the following to check if all optional arguments were missing:

\NewDocumentCommand \question {o o o m} {
    \bool_if:nTF {
        \str_if_eq_p:nn { \NoValue } { #1 } &&
        \str_if_eq_p:nn { \NoValue } { #2 } &&
        \str_if_eq_p:nn { \NoValue } { #3 }
     } {
         <DO STUFF 1>
     } {
         <DO STUFF 2>
     }
}

But that broke with the latest xparse update. Now there seems to be only the \IfNoValueTF{}{}{} macro but then I have to repeat one the DO STUFF x things. I read the xparse.sty but there seems to be no such easy solution anymore due to the QNoValue- "hack".

Any ideas?

Answer 1

Edit: Since blank values aren't “no values” it is sufficient to check if the first option is given:

\ExplSyntaxOn
\NewDocumentCommand \question { o o o m } {
    \IfNoValueTF { #1 } {
         <DO STUFF 1>
     } {
         <DO STUFF 2>
     }
}
\ExplSyntaxOff

Depending on the type of expected input an overall different syntax might be a better way, though. Three optional arguments make a command unnecessary complicated for most cases. Maybe one optional argument expecting a keyval-like input would be a better choice?

Old answer:

Here's an idea:

\documentclass{article}
\usepackage{expl3,xparse}

\ExplSyntaxOn
\NewDocumentCommand \question {O{\NoValue} O{\NoValue} O{\NoValue} m} {
    \bool_if:nTF {
        \str_if_eq_p:nn { \NoValue } { #1 } &&
        \str_if_eq_p:nn { \NoValue } { #2 } &&
        \str_if_eq_p:nn { \NoValue } { #3 }
     } {
         <DO STUFF 1>
     } {
         <DO STUFF 2>
     }
}
\ExplSyntaxOff

\begin{document}

\question{}

\question[]{}

\question[][]{}

\question[][][]{}
\end{document}