Macro rayon::delegate::delegate_iterator

macro_rules! delegate_iterator {
    ($iter:ty => $item:ty ,
     impl $( $args:tt )*
     ) => { ... };
}

Creates a parallel iterator implementation which simply wraps an inner type and delegates all methods inward. The actual struct must already be declared with an inner field.

The implementation of IntoParallelIterator should be added separately.