diff options
Diffstat (limited to 'library/core/src/iter/adapters/flatten.rs')
-rw-r--r-- | library/core/src/iter/adapters/flatten.rs | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/library/core/src/iter/adapters/flatten.rs b/library/core/src/iter/adapters/flatten.rs index 520ec9abcf0..2568aaf34f3 100644 --- a/library/core/src/iter/adapters/flatten.rs +++ b/library/core/src/iter/adapters/flatten.rs @@ -310,6 +310,7 @@ where /// Real logic of both `Flatten` and `FlatMap` which simply delegate to /// this type. #[derive(Clone, Debug)] +#[unstable(feature = "trusted_len", issue = "37572")] struct FlattenCompat<I, U> { iter: Fuse<I>, frontiter: Option<U>, @@ -463,6 +464,7 @@ where } } +#[unstable(feature = "trusted_len", issue = "37572")] impl<I, U> Iterator for FlattenCompat<I, U> where I: Iterator<Item: IntoIterator<IntoIter = U, Item = U::Item>>, @@ -577,6 +579,7 @@ where } } +#[unstable(feature = "trusted_len", issue = "37572")] impl<I, U> DoubleEndedIterator for FlattenCompat<I, U> where I: DoubleEndedIterator<Item: IntoIterator<IntoIter = U, Item = U::Item>>, @@ -646,6 +649,7 @@ where } } +#[unstable(feature = "trusted_len", issue = "37572")] unsafe impl<const N: usize, I, T> TrustedLen for FlattenCompat<I, <[T; N] as IntoIterator>::IntoIter> where @@ -653,6 +657,7 @@ where { } +#[unstable(feature = "trusted_len", issue = "37572")] unsafe impl<'a, const N: usize, I, T> TrustedLen for FlattenCompat<I, <&'a [T; N] as IntoIterator>::IntoIter> where @@ -660,6 +665,7 @@ where { } +#[unstable(feature = "trusted_len", issue = "37572")] unsafe impl<'a, const N: usize, I, T> TrustedLen for FlattenCompat<I, <&'a mut [T; N] as IntoIterator>::IntoIter> where |