Function check_str_for_latin1_and_bidi

pub fn check_str_for_latin1_and_bidi(buffer: &str) -> Latin1Bidi

Checks whether a valid UTF-8 buffer contains code points that trigger right-to-left processing or is all-Latin1.

Possibly more efficient than performing the checks separately.

Returns Latin1Bidi::Latin1 if is_str_latin1() would return true. Otherwise, returns Latin1Bidi::Bidi if is_str_bidi() would return true. Otherwise, returns Latin1Bidi::LeftToRight.