Function rustfst::algorithms::closure_star

pub fn closure_star<F>(fst: &mut F) -> Result<(), Error>where
    F: ExpandedFst + MutableFst,

This operation computes the concatenative closure. If A transduces string x to y with weight a, then the closure transduces x to y with weight a, xx to yy with weight a ⊗ a, xxx to yyy with weight a ⊗ a ⊗ a, etc. The empty string is transduced to itself with weight 1 as well.