Function rustfst::algorithms::condense

pub fn condense<W: Semiring, FI: Fst<W> + ExpandedFst<W>, FO: MutableFst<W>>(
    ifst: &FI
) -> Result<(Vec<i32>, FO)>

Return an acyclic FST where each SCC in the input FST has been condensed to a single state with transitions between SCCs retained and within SCCs dropped.

Also populates ‘scc’ with a mapping from input to output states.