pub fn conditional_branches(name: &str) -> Option<usize>Expand description
The number of trailing T/F branch arguments of an expl3 conditional, read
from the command name’s argspec (the substring after the final :).
\tl_if_empty:nTF → Some(2), \bool_if:nT/:nF → Some(1); None for any
name without a :-argspec ending in T/F — a non-conditional expl3 function
(\seq_new:N), or a LaTeX2e command with no colon (\@ifpackageloaded). In an
expl3 argspec T/F denote only the true/false branch slots, so a trailing
T/F run is exactly the branch count.
Deliberately not derived from expl3_slots: this counts the raw
trailing run, so a name whose earlier letters make the arity unrecognized
(a hypothetical :wTF shape) still reports its branches — the conditional
layout keys on the branches alone and must not regress when the full arity
model bows out.