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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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3.1 kB · 148 lines
Rust
at master
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use alloc::rc::Rc;use alloc::vec;use core::mem;use core::panic::RefUnwindSafe;use core::slice;
pub(crate) struct RcVec<T> { inner: Rc<Vec<T>>,}
pub(crate) struct RcVecBuilder<T> { inner: Vec<T>,}
pub(crate) struct RcVecMut<'a, T> { inner: &'a mut Vec<T>,}
#[derive(Clone)]pub(crate) struct RcVecIntoIter<T> { inner: vec::IntoIter<T>,}
impl<T> RcVec<T> { pub(crate) fn is_empty(&self) -> bool { self.inner.is_empty() }
pub(crate) fn len(&self) -> usize { self.inner.len() }
pub(crate) fn iter(&self) -> slice::Iter<T> { self.inner.iter() }
pub(crate) fn make_mut(&mut self) -> RcVecMut<T> where T: Clone, { RcVecMut { inner: Rc::make_mut(&mut self.inner), } }
pub(crate) fn get_mut(&mut self) -> Option<RcVecMut<T>> { let inner = Rc::get_mut(&mut self.inner)?; Some(RcVecMut { inner }) }
pub(crate) fn make_owned(mut self) -> RcVecBuilder<T> where T: Clone, { let vec = if let Some(owned) = Rc::get_mut(&mut self.inner) { mem::take(owned) } else { Vec::clone(&self.inner) }; RcVecBuilder { inner: vec } }}
impl<T> RcVecBuilder<T> { pub(crate) fn new() -> Self { RcVecBuilder { inner: Vec::new() } }
pub(crate) fn with_capacity(cap: usize) -> Self { RcVecBuilder { inner: Vec::with_capacity(cap), } }
pub(crate) fn push(&mut self, element: T) { self.inner.push(element); }
pub(crate) fn extend(&mut self, iter: impl IntoIterator<Item = T>) { self.inner.extend(iter); }
pub(crate) fn as_mut(&mut self) -> RcVecMut<T> { RcVecMut { inner: &mut self.inner, } }
pub(crate) fn build(self) -> RcVec<T> { RcVec { inner: Rc::new(self.inner), } }}
impl<'a, T> RcVecMut<'a, T> { pub(crate) fn push(&mut self, element: T) { self.inner.push(element); }
pub(crate) fn extend(&mut self, iter: impl IntoIterator<Item = T>) { self.inner.extend(iter); }
pub(crate) fn as_mut(&mut self) -> RcVecMut<T> { RcVecMut { inner: self.inner } }
pub(crate) fn take(self) -> RcVecBuilder<T> { let vec = mem::take(self.inner); RcVecBuilder { inner: vec } }}
impl<T> Clone for RcVec<T> { fn clone(&self) -> Self { RcVec { inner: Rc::clone(&self.inner), } }}
impl<T> IntoIterator for RcVecBuilder<T> { type Item = T; type IntoIter = RcVecIntoIter<T>;
fn into_iter(self) -> Self::IntoIter { RcVecIntoIter { inner: self.inner.into_iter(), } }}
impl<T> Iterator for RcVecIntoIter<T> { type Item = T;
fn next(&mut self) -> Option<Self::Item> { self.inner.next() }
fn size_hint(&self) -> (usize, Option<usize>) { self.inner.size_hint() }}
impl<T> RefUnwindSafe for RcVec<T> where T: RefUnwindSafe {}