如何将片与字节字符串文字进行比较?

pub(crate) fn from_slice(slice: &[u8]) -> Option<SqlStateCode> {
    match slice {
      b"3030303030" => Some(SqlStateCode::SuccessfulCompletion),
      b"3031303030" => Some(SqlStateCode::Warning),
      b"3031303043" => Some(SqlStateCode::DynamicResultSetsReturned),
      _=> None
    }
}

除非我用数组替换字节字符串文字,否则它不会工作:

[30, 31, 30, 30, 43] => Some(SqlStateCode::DynamicResultSetsReturned)