Function parsed_values 

pub fn parsed_values<'t, 'v, T>(
    values: Vec<Vec<u8>>,
    name: &'t str,
) -> Result<Vec<T>, Error<'t, 'v>>
where
    T: FromStr,
    T::Err: Display,

Convert every repeated value of one field through FromStr, reporting name for the first that fails.

Monomorphized once per target type rather than expanded once per field, and the empty case is answered at the field for the reason utf8_values gives.