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use_prelude!();
use ::core::slice;
use crate::slice::*;
ReprC! {
#[repr(C)]
#[cfg_attr(all(docs, feature = "nightly"), doc(cfg(feature = "alloc")))]
pub
struct Vec[T] {
ptr: ptr::NonNullOwned<T>,
len: usize,
cap: usize,
}
}
impl<T> Vec<T> {
#[inline]
pub
fn as_ref (self: &'_ Self)
-> slice_ref<'_, T>
{
crate::slice::slice_ref {
ptr: self.ptr.0.into(),
len: self.len,
_lt: Default::default(),
}
}
#[inline]
pub
fn as_mut (self: &'_ mut Self)
-> slice_mut<'_, T>
{
crate::slice::slice_mut {
ptr: self.ptr.0.into(),
len: self.len,
_lt: Default::default(),
}
}
}
impl<T> From<rust::Vec<T>>
for Vec<T>
{
#[inline]
fn from (vec: rust::Vec<T>)
-> Vec<T>
{
let len = vec.len();
let cap = vec.capacity();
let ptr = mem::ManuallyDrop::new(vec).as_mut_ptr();
Self {
ptr: unsafe {
ptr::NonNull::new_unchecked(ptr)
}.into(),
len,
cap,
}
}
}
impl<T> Into<rust::Vec<T>>
for Vec<T>
{
#[inline]
fn into (self: Vec<T>)
-> rust::Vec<T>
{
let mut this = mem::ManuallyDrop::new(self);
unsafe {
rust::Vec::from_raw_parts(
this.ptr.as_mut_ptr(),
this.len,
this.cap,
)
}
}
}
impl<T> Drop
for Vec<T>
{
#[inline]
fn drop (self: &'_ mut Vec<T>)
{
unsafe {
drop::<rust::Vec<T>>(
ptr::read(self)
.into()
)
}
}
}
impl<T> Deref
for Vec<T>
{
type Target = [T];
fn deref (self: &'_ Vec<T>)
-> &'_ [T]
{
unsafe {
slice::from_raw_parts(
self.ptr.as_ptr(),
self.len,
)
}
}
}
impl<T> DerefMut
for Vec<T>
{
fn deref_mut (self: &'_ mut Vec<T>)
-> &'_ mut [T]
{
unsafe {
slice::from_raw_parts_mut(
self.ptr.as_mut_ptr(),
self.len(),
)
}
}
}
unsafe
impl<T> Send
for Vec<T>
where
rust::Vec<T> : Send,
{}
unsafe
impl<T> Sync
for Vec<T>
where
rust::Vec<T> : Sync,
{}
impl<T> Vec<T> {
pub
const EMPTY: Self = Self {
ptr: ptr::NonNullOwned(ptr::NonNull::dangling(), PhantomData),
len: 0,
cap: 0,
};
pub
fn with_rust_mut<R> (
self: &'_ mut Self,
f: impl FnOnce(&'_ mut rust::Vec<T>) -> R,
) -> R
{
use mem::ManuallyDrop as MD;
let this: &'_ mut MD<Self> = unsafe {
mem::transmute(self)
};
let rust_vec: rust::Vec<T> =
unsafe { MD::take(this) }
.into()
;
return f(&mut Guard(MD::new(rust_vec), this).0);
struct Guard<'__, T> (
MD<rust::Vec<T>>,
&'__ mut MD<Vec<T>>,
);
impl<T> Drop for Guard<'_, T> {
fn drop (self: &'_ mut Self)
{
unsafe {
*self.1 = MD::new(MD::take(&mut self.0).into())
}
}
}
}
}
impl<T : fmt::Debug + ReprC> fmt::Debug
for Vec<T>
{
fn fmt (self: &'_ Self, fmt: &'_ mut fmt::Formatter<'_>)
-> fmt::Result
{
<[T] as fmt::Debug>::fmt(&self[..], fmt)
}
}
#[macro_export]
macro_rules! c_vec { [$($input:tt)*] => (
$crate::Vec::from($crate::std::vec![ $($input)* ])
)}