pub fn expl3_slots(name: &str) -> Option<Vec<Expl3Slot>>Expand description
The argument slots of an expl3 function name, read from its argspec suffix
(the substring after the final :), or None when the name has no
derivable call-site arity.
Some iff the name contains a : and every suffix letter is a fixed-shape
letter per the module docs; an empty suffix (\scan_stop:, \group_end:)
is Some(vec![]) — a recognized zero-argument call. None for a colonless
name (\def, \@ifpackageloaded), or a spec containing w, D, a
mid-spec T/F, or any unknown letter.