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Matthias Krüger 16b251be10
Rollup merge of #125048 - dingxiangfei2009:stable-deref, r=amanieu 
PinCoerceUnsized trait into core

cc ``@Darksonn`` ``@wedsonaf`` ``@ojeda``

This is a PR to introduce a `PinCoerceUnsized` trait in order to make trait impls generated by the proc-macro `#[derive(SmartPointer)]`, proposed by [RFC](e17e19ac7a/text/3621-derive-smart-pointer.md (pincoerceunsized-1)), sound. There you may find explanation, justification and discussion about the alternatives.

Note that we do not seek stabilization of this `PinCoerceUnsized` trait in the near future. The stabilisation of this trait does not block the eventual stabilization process of the `#[derive(SmartPointer)]` macro. Ideally, use of `DerefPure` is more preferrable except this will actually constitute a breaking change. `PinCoerceUnsized` emerges as a solution to the said soundness hole while avoiding the breaking change. More details on the `DerefPure` option have been described in this [section](e17e19ac7a/text/3621-derive-smart-pointer.md (derefpure)) of the RFC linked above.

Earlier discussion can be found in this [Zulip stream](https://rust-lang.zulipchat.com/#narrow/stream/136281-t-opsem/topic/Pin.20and.20soundness.20of.20unsizing.20coercions) and [rust-for-linux thread](https://rust-lang.zulipchat.com/#narrow/stream/425075-rust-for-linux/topic/.23.5Bderive.28SmartPointer.29.5D.20and.20pin.20unsoundness.20rfc.233621).

try-job: dist-various-2
2024-08-07 00:34:11 +02:00
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async_iter
Remove unnecessary lets and borrowing from Waker::noop() usage.
2024-01-17 12:00:27 -08:00
ffi
CStr: derive PartialEq, Eq; add test for Ord
2024-07-25 14:18:40 +03:00
fmt
Mark format! with must_use hint
2024-07-06 14:24:20 +02:00
hash
Reformat use declarations.
2024-07-29 08:26:52 +10:00
io
Make io::BorrowedCursor::advance safe
2024-02-07 16:46:28 +01:00
iter
Reformat use declarations.
2024-07-29 08:26:52 +10:00
net
Reformat use declarations.
2024-07-29 08:26:52 +10:00
num
Reformat use declarations.
2024-07-29 08:26:52 +10:00
ops
…
panic
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alloc.rs
rename ptr::invalid -> ptr::without_provenance
2024-02-21 20:15:52 +01:00
any.rs
Adjust library tests for unused_tuple_struct_fields -> dead_code
2024-01-02 15:34:37 -05:00
array.rs
Reformat use declarations.
2024-07-29 08:26:52 +10:00
ascii.rs
optimize Cstr/EscapeAscii display
2023-06-29 01:55:03 +02:00
asserting.rs
Spelling library/
2023-04-26 02:10:22 -04:00
atomic.rs
Adjust library tests for unused_tuple_struct_fields -> dead_code
2024-01-02 15:34:37 -05:00
bool.rs
fix library and rustdoc tests
2023-04-16 11:38:52 +00:00
cell.rs
apply fmt
2024-01-11 15:04:48 +03:00
char.rs
remove redundant imports
2023-12-10 10:56:22 +08:00
clone.rs
Reformat use declarations.
2024-07-29 08:26:52 +10:00
cmp.rs
Reformat use declarations.
2024-07-29 08:26:52 +10:00
const_ptr.rs
…
convert.rs
fix library and rustdoc tests
2023-04-16 11:38:52 +00:00
error.rs
apply fmt
2024-01-11 15:04:48 +03:00
ffi.rs
CStr: derive PartialEq, Eq; add test for Ord
2024-07-25 14:18:40 +03:00
future.rs
Avoid ref when using format! for perf
2024-07-19 12:23:49 -04:00
intrinsics.rs
Step bootstrap cfgs
2024-05-01 22:19:11 -04:00
lazy.rs
Reformat use declarations.
2024-07-29 08:26:52 +10:00
lib.rs
Stabilize offset_of_nested
2024-07-29 17:50:12 +01:00
macros.rs
Update tests
2024-02-07 10:42:01 +08:00
manually_drop.rs
Flip cfg's for bootstrap bump
2023-07-12 21:38:55 -04:00
mem.rs
Reformat use declarations.
2024-07-29 08:26:52 +10:00
nonzero.rs
Replace NonZero::<_>::new with NonZero::new.
2024-02-15 08:09:42 +01:00
ops.rs
Reformat use declarations.
2024-07-29 08:26:52 +10:00
option.rs
Make Option::as_[mut_]slice const
2024-06-19 21:44:47 +01:00
panic.rs
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pattern.rs
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pin_macro.rs
Reformat use declarations.
2024-07-29 08:26:52 +10:00
pin.rs
PinCoerceUnsized trait into core
2024-07-31 17:10:55 +08:00
ptr.rs
Fix doc nits
2024-07-26 13:26:33 +01:00
result.rs
Reformat use declarations.
2024-07-29 08:26:52 +10:00
simd.rs
Fix library tests
2023-11-26 08:50:39 -05:00
slice.rs
Rewrite binary search implementation
2024-07-30 17:07:56 +01:00
str_lossy.rs
Stabilize Utf8Chunks
2024-04-24 15:27:47 -07:00
str.rs
…
task.rs
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time.rs
core: add Duration constructors
2024-01-24 14:24:57 +01:00
tuple.rs
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unicode.rs
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waker.rs
Reformat use declarations.
2024-07-29 08:26:52 +10:00