Function try_fold_iter 

pub fn try_fold_iter<Stream, Context, Parser, IntoIter, Acc, Init, Ret, F>(
    parser: Parser,
    iter: IntoIter,
    init: Init,
    f: F,
) -> TryFoldIter<Parser, IntoIter, Init, F>
where
    Parser: Parse<Stream, Context>,
    Stream: Streaming,
    Context: Contexting<UtilsAtom<Stream>>,
    IntoIter: IntoIterator + Clone,
    Init: Fn() -> Ret,
    F: Fn(Acc, Parser::Token, IntoIter::Item) -> Ret,
    Ret: Try<Output = Acc>,
    Parsed<Acc, Stream, Context>: FromResidual<Ret::Residual>,

Function style version of crate::Utils::try_fold_iter