diff options
| -rw-r--r-- | library/core/src/iter/adapters/enumerate.rs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/library/core/src/iter/adapters/enumerate.rs b/library/core/src/iter/adapters/enumerate.rs index bd093e279c3..1f2cf3244b3 100644 --- a/library/core/src/iter/adapters/enumerate.rs +++ b/library/core/src/iter/adapters/enumerate.rs @@ -23,6 +23,18 @@ impl<I> Enumerate<I> { pub(in crate::iter) fn new(iter: I) -> Enumerate<I> { Enumerate { iter, count: 0 } } + + /// Retrieve the current position of the iterator. + /// + /// If the iterator has not advanced, the position returned will be 0. + /// + /// The position may also exceed the bounds of the iterator to allow for calculating + /// the displacement of the iterator from following calls to [`Iterator::next`]. + #[inline] + #[unstable(feature = "next_index", issue = "130711")] + pub fn next_index(&self) -> usize { + self.count + } } #[stable(feature = "rust1", since = "1.0.0")] |