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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /library/alloc/src/collections/vec_deque/into_iter.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'library/alloc/src/collections/vec_deque/into_iter.rs')
-rw-r--r-- | library/alloc/src/collections/vec_deque/into_iter.rs | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/library/alloc/src/collections/vec_deque/into_iter.rs b/library/alloc/src/collections/vec_deque/into_iter.rs new file mode 100644 index 000000000..55f6138cd --- /dev/null +++ b/library/alloc/src/collections/vec_deque/into_iter.rs @@ -0,0 +1,72 @@ +use core::fmt; +use core::iter::{FusedIterator, TrustedLen}; + +use crate::alloc::{Allocator, Global}; + +use super::VecDeque; + +/// An owning iterator over the elements of a `VecDeque`. +/// +/// This `struct` is created by the [`into_iter`] method on [`VecDeque`] +/// (provided by the [`IntoIterator`] trait). See its documentation for more. +/// +/// [`into_iter`]: VecDeque::into_iter +/// [`IntoIterator`]: core::iter::IntoIterator +#[derive(Clone)] +#[stable(feature = "rust1", since = "1.0.0")] +pub struct IntoIter< + T, + #[unstable(feature = "allocator_api", issue = "32838")] A: Allocator = Global, +> { + inner: VecDeque<T, A>, +} + +impl<T, A: Allocator> IntoIter<T, A> { + pub(super) fn new(inner: VecDeque<T, A>) -> Self { + IntoIter { inner } + } +} + +#[stable(feature = "collection_debug", since = "1.17.0")] +impl<T: fmt::Debug, A: Allocator> fmt::Debug for IntoIter<T, A> { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_tuple("IntoIter").field(&self.inner).finish() + } +} + +#[stable(feature = "rust1", since = "1.0.0")] +impl<T, A: Allocator> Iterator for IntoIter<T, A> { + type Item = T; + + #[inline] + fn next(&mut self) -> Option<T> { + self.inner.pop_front() + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + let len = self.inner.len(); + (len, Some(len)) + } +} + +#[stable(feature = "rust1", since = "1.0.0")] +impl<T, A: Allocator> DoubleEndedIterator for IntoIter<T, A> { + #[inline] + fn next_back(&mut self) -> Option<T> { + self.inner.pop_back() + } +} + +#[stable(feature = "rust1", since = "1.0.0")] +impl<T, A: Allocator> ExactSizeIterator for IntoIter<T, A> { + fn is_empty(&self) -> bool { + self.inner.is_empty() + } +} + +#[stable(feature = "fused", since = "1.26.0")] +impl<T, A: Allocator> FusedIterator for IntoIter<T, A> {} + +#[unstable(feature = "trusted_len", issue = "37572")] +unsafe impl<T, A: Allocator> TrustedLen for IntoIter<T, A> {} |