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use super::*;

macro_rules! m_tuple {
    ($($Tuple:ident $Arr:ident { $($T:ident . $t:ident . $idx:tt),* } )*) => ($(
        impl<$($T),*> Iterator for $Tuple<$($T),*> where $( $T: Iterator  ),* {
            type Item = $Tuple<$($T::Item),*>;
            #[allow(non_snake_case)]
            #[inline(always)]
            fn next(&mut self) -> Option<Self::Item> {
                match ( $(self.$idx.next(), )* ) {
                    ( $( Some($T) ,)* ) => Some($Tuple( $($T),* )),
                    _ => None
                }
            }
        }
    )*)
}

impl_tuple!(m_tuple);