fn check_redundant_vis_repetition(
err: &mut Diag<'_>,
sess: &Session,
seq: &SequenceRepetition,
span: &DelimSpan,
)
Expand description
Checks if a vis
nonterminal fragment is unnecessarily wrapped in an optional repetition.
When a vis
fragment (which can already be empty) is wrapped in $(...)?
,
this suggests removing the redundant repetition syntax since it provides no additional benefit.