Type arguments to `compose` are horrendous

[dhdaines]

Not sure if this is rusfst's fault or something inherent to the Rust language, but I really don't feel like it should be necessary to write a straightforward compose operation this way (https://github.com/dhdaines/rustfst-g2p/blob/main/src/g2p.rs#L148):

// fst and self.model are both VectorFst<TropicalWeight>
let fst: VectorFst<TropicalWeight> = compose::<
    TropicalWeight,
    VectorFst<TropicalWeight>,
    VectorFst<TropicalWeight>,
    _,
    _,
    _,
>(fst, &self.model)?;

Is there something that can be done to make rustc properly infer types W, F1, and F2?

[Garvys]

Hello ! For now this is necessary because the rust compiler can't infer the correct types for F1, F2 because of the use of Borrow. I have found a solution for that at the moment 🤔