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detects redundant imports that can be eliminated.
for #117772 :
In order to facilitate review and modification, split the checking code and
removing redundant imports code into two PR.
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add LinkedList::{retain,retain_mut}
Implement #114135
The API is consistent with other collections.
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Add proper cfgs in std
Detected by #118257
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Expand in-place iteration specialization to Flatten, FlatMap and ArrayChunks
This enables the following cases to collect in-place:
```rust
let v = vec![[0u8; 4]; 1024]
let v: Vec<_> = v.into_iter().flatten().collect();
let v: Vec<Option<NonZeroUsize>> = vec![NonZeroUsize::new(0); 1024];
let v: Vec<_> = v.into_iter().flatten().collect();
let v = vec![u8; 4096];
let v: Vec<_> = v.into_iter().array_chunks::<4>().collect();
```
Especially the nicheful-option-flattening should be useful in real code.
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Closes rust-lang/wg-allocators#118
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Signed-off-by: cui fliter <imcusg@gmail.com>
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Rollup of 3 pull requests
Successful merges:
- #112151 (Clarify behavior of inclusive bounds in BTreeMap::{lower,upper}_bound)
- #113512 (Updated lines doc to include trailing carriage return note)
- #114203 (Effects: don't print `host` param in diagnostics)
r? `@ghost`
`@rustbot` modify labels: rollup
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Clarify behavior of inclusive bounds in BTreeMap::{lower,upper}_bound
It wasn’t quite clear to me how these methods would interpret inclusive bounds so I added examples for those.
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Remove redundant example of `BTreeSet::iter`
The usage and that `Values returned by the iterator are returned in ascending order` are already demonstrated by the other example and the description, so I removed the useless one.
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Not useful, for there is just a single example
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Signed-off-by: TennyZhuang <zty0826@gmail.com>
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#[must_use]
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Ignore `core`, `alloc` and `test` tests that require unwinding on `-C panic=abort`
Some of the tests for `core` and `alloc` require unwinding through their use of `catch_unwind`. These tests fail when testing using `-C panic=abort` (in my case through a target without unwinding support, and `-Z panic-abort-tests`), while they should be ignored as they don't indicate a failure.
This PR marks all of these tests with this attribute:
```rust
#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
```
I'm not aware of a way to test this on rust-lang/rust's CI, as we don't test any target with `-C panic=abort`, but I tested this locally on a Ferrocene target and it does indeed make the test suite pass.
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Our `Cursor::peek_prev` and `CursorMut::peek_prev` must agree
on how to behave when they are called on the "null element".
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Make sure that some stdlib method signatures aren't accidental refinements
In the process of implementing https://rust-lang.github.io/rfcs/3245-refined-impls.html, I found a bunch of stdlib implementations that accidentally "refined" their method signatures by dropping (unnecessary) bounds.
This isn't currently a problem, but may become one if/when method signature refining is stabilized in the future. Shouldn't hurt to make these signatures a bit more accurate anyways.
NOTE (just to be clear lol): This does not affect behavior at all, since we don't actually take advantage of refined implementations yet!
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Spelling library
Split per https://github.com/rust-lang/rust/pull/110392
I can squash once people are happy w/ the changes. It's really uncommon for large sets of changes to be perfectly acceptable w/o at least some changes.
I probably won't have time to respond until tomorrow or the next day
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* advance
* aligned
* borrowed
* calculate
* debugable
* debuggable
* declarations
* desugaring
* documentation
* enclave
* ignorable
* initialized
* iterator
* kaboom
* monomorphization
* nonexistent
* optimizer
* panicking
* process
* reentrant
* rustonomicon
* the
* uninitialized
Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>
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Add support for allocators in `LinkedList`
Allows `LinkedList` to use a custom allocator
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Remove some unneeded imports / qualified paths
Continuation of #105537.
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binary_heap: Optimize Extend implementation.
This PR makes the `Extend` implementation for `BinaryHeap` no longer rely on specialization, so that it always use the bulk rebuild optimization that was previously only available for the `Vec` specialization.
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Stabilize `binary_heap_retain`
FCP finished in tracking issue: #71503
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Enhanced doucmentation of binary search methods for `slice` and `VecDeque` for unsorted instances
Fixes #106746. Issue #106746 raises the concern that the binary search methods for slices and deques aren't explicit enough about the fact that they are only applicable to sorted slices/deques. I changed the explanation for these methods. I took the relatively harsh description of the behaviour of binary search on unsorted collections ("unspecified and meaningless") from the description of the [`partition_point`](https://doc.rust-lang.org/std/primitive.slice.html#method.partition_point) method:
> If this slice is not partitioned, the returned result is unspecified and meaningless, as this method performs a kind of binary search.
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unsorted instances
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