add an associated Item
type to IntoIterator
#22313
Merged
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IntoIterator
now has an extra associated item:This lets you bind the iterator "
Item
" directly when writing generic functions:The downside is that now you have to write an extra associated type in your
IntoIterator
implementations:impl<T> IntoIterator for Vec<T> { + type Item = T; type IntoIter = IntoIter<T>; fn into_iter(self) -> IntoIter<T> { .. } }
Because this breaks all downstream implementations of
IntoIterator
, this is a [breaking-change]r? @aturon