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Since I found myself in the need to have lending iterators, which are exclusively used in for-loops like iteration, i.e. while let Some(…) = iter.next() { … } I whipped up a generic lending iterator trait and a declarative macro to facilitate iteration over iterator expressions.
The purpose of the macro is to improve ergonomics to not need to instantiate the iterator in a mutable variable manually each time and then call next() on it (and not accidentally re-instantiate the iterator on each iteration causing an infinite looping over the first item).
What are your thoughts on this?
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