120 lines
3.1 KiB
Rust
120 lines
3.1 KiB
Rust
// SPDX-License-Identifier: Apache-2.0 OR MIT
|
|
|
|
use crate::alloc::Allocator;
|
|
use crate::collections::TryReserveError;
|
|
use core::iter::TrustedLen;
|
|
use core::slice::{self};
|
|
|
|
use super::{IntoIter, Vec};
|
|
|
|
// Specialization trait used for Vec::extend
|
|
#[cfg(not(no_global_oom_handling))]
|
|
pub(super) trait SpecExtend<T, I> {
|
|
fn spec_extend(&mut self, iter: I);
|
|
}
|
|
|
|
// Specialization trait used for Vec::try_extend
|
|
pub(super) trait TrySpecExtend<T, I> {
|
|
fn try_spec_extend(&mut self, iter: I) -> Result<(), TryReserveError>;
|
|
}
|
|
|
|
#[cfg(not(no_global_oom_handling))]
|
|
impl<T, I, A: Allocator> SpecExtend<T, I> for Vec<T, A>
|
|
where
|
|
I: Iterator<Item = T>,
|
|
{
|
|
default fn spec_extend(&mut self, iter: I) {
|
|
self.extend_desugared(iter)
|
|
}
|
|
}
|
|
|
|
impl<T, I, A: Allocator> TrySpecExtend<T, I> for Vec<T, A>
|
|
where
|
|
I: Iterator<Item = T>,
|
|
{
|
|
default fn try_spec_extend(&mut self, iter: I) -> Result<(), TryReserveError> {
|
|
self.try_extend_desugared(iter)
|
|
}
|
|
}
|
|
|
|
#[cfg(not(no_global_oom_handling))]
|
|
impl<T, I, A: Allocator> SpecExtend<T, I> for Vec<T, A>
|
|
where
|
|
I: TrustedLen<Item = T>,
|
|
{
|
|
default fn spec_extend(&mut self, iterator: I) {
|
|
self.extend_trusted(iterator)
|
|
}
|
|
}
|
|
|
|
impl<T, I, A: Allocator> TrySpecExtend<T, I> for Vec<T, A>
|
|
where
|
|
I: TrustedLen<Item = T>,
|
|
{
|
|
default fn try_spec_extend(&mut self, iterator: I) -> Result<(), TryReserveError> {
|
|
self.try_extend_trusted(iterator)
|
|
}
|
|
}
|
|
|
|
#[cfg(not(no_global_oom_handling))]
|
|
impl<T, A: Allocator> SpecExtend<T, IntoIter<T>> for Vec<T, A> {
|
|
fn spec_extend(&mut self, mut iterator: IntoIter<T>) {
|
|
unsafe {
|
|
self.append_elements(iterator.as_slice() as _);
|
|
}
|
|
iterator.forget_remaining_elements();
|
|
}
|
|
}
|
|
|
|
impl<T, A: Allocator> TrySpecExtend<T, IntoIter<T>> for Vec<T, A> {
|
|
fn try_spec_extend(&mut self, mut iterator: IntoIter<T>) -> Result<(), TryReserveError> {
|
|
unsafe {
|
|
self.try_append_elements(iterator.as_slice() as _)?;
|
|
}
|
|
iterator.forget_remaining_elements();
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
#[cfg(not(no_global_oom_handling))]
|
|
impl<'a, T: 'a, I, A: Allocator> SpecExtend<&'a T, I> for Vec<T, A>
|
|
where
|
|
I: Iterator<Item = &'a T>,
|
|
T: Clone,
|
|
{
|
|
default fn spec_extend(&mut self, iterator: I) {
|
|
self.spec_extend(iterator.cloned())
|
|
}
|
|
}
|
|
|
|
impl<'a, T: 'a, I, A: Allocator> TrySpecExtend<&'a T, I> for Vec<T, A>
|
|
where
|
|
I: Iterator<Item = &'a T>,
|
|
T: Clone,
|
|
{
|
|
default fn try_spec_extend(&mut self, iterator: I) -> Result<(), TryReserveError> {
|
|
self.try_spec_extend(iterator.cloned())
|
|
}
|
|
}
|
|
|
|
#[cfg(not(no_global_oom_handling))]
|
|
impl<'a, T: 'a, A: Allocator> SpecExtend<&'a T, slice::Iter<'a, T>> for Vec<T, A>
|
|
where
|
|
T: Copy,
|
|
{
|
|
fn spec_extend(&mut self, iterator: slice::Iter<'a, T>) {
|
|
let slice = iterator.as_slice();
|
|
unsafe { self.append_elements(slice) };
|
|
}
|
|
}
|
|
|
|
impl<'a, T: 'a, A: Allocator> TrySpecExtend<&'a T, slice::Iter<'a, T>> for Vec<T, A>
|
|
where
|
|
T: Copy,
|
|
{
|
|
fn try_spec_extend(&mut self, iterator: slice::Iter<'a, T>) -> Result<(), TryReserveError> {
|
|
let slice = iterator.as_slice();
|
|
unsafe { self.try_append_elements(slice) }
|
|
}
|
|
}
|