Function transaction

pub fn transaction<Out, Err, F, T>(f: F) -> TransactionResult<Out, Err>
where
    T: Transaction<Err>,
    F: FnOnce(&mut T) -> Result<Out, Err>,

A generic interface for defining transactions, where the transaction mode is determined by the function’s parameter (it can be FallibleTransaction or InfallibleTransaction).

This makes switching between different transaction guarantees easier, but is more constrained than using the specific transaction functions where for retried transactions errors does not have to be handled.