pub fn comma_delimited<T: fmt::Display>(f: &mut fmt::Formatter, mut iter: impl Iterator<Item=T>) -> fmt::Result {
    if let Some(part) = iter.next() {
        fmt::Display::fmt(&part, f)?;
    }
    for part in iter {
        f.write_str(", ")?;
        fmt::Display::fmt(&part, f)?;
    }
    Ok(())
}
/// Format an array into a comma-delimited string.
Format an array into a comma-delimited string.
Format an array into a comma - delimited string .
pub fn comma_delimited<T: fmt::Display>(f: &mut fmt::Formatter, mut iter: impl Iterator<Item=T>) -> fmt::Result {
    if let Some(part) = iter.next() {
        fmt::Display::fmt(&part, f)?;
    }
    for part in iter {
        f.write_str(", ")?;
        fmt::Display::fmt(&part, f)?;
    }
    Ok(())
}
pub fn comma_delimited < T : fmt :: Display > ( f : & mut fmt :: Formatter , mut iter : impl Iterator < Item = T > ) -> fmt :: Result { if let Some ( part ) = iter . next ( ) { fmt :: Display :: fmt ( & part , f ) ? ; } for part in iter { f . write_str ( " " ) ? ; fmt :: Display :: fmt ( & part , f ) ? ; } Ok ( ( ) ) }
Format an array into a comma-delimited string.
Format an array into a comma - delimited string .
f
&mut fmt::Formatter
iter
impl Iterator<Item=T>
f
&mut fmt::Formatter
iter
impl Iterator<Item=T>