Function chrono::format::format

pub fn format<'a, I>(w: &mut Formatter,
                     date: Option<&NaiveDate>,
                     time: Option<&NaiveTime>,
                     off: Option<&(String, FixedOffset)>,
                     items: I)
                     -> Result where I: Iterator<Item=Item<'a>>

Tries to format given arguments with given formatting items. Internally used by DelayedFormat.