rust/compiler/rustc_span/src
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
..
analyze_source_file Be more accurate about calculating display_col from a BytePos 2024-07-18 20:08:38 +00:00
edit_distance Add test for precise algorithm used 2023-02-19 22:59:22 +00:00
source_map Be more accurate about calculating display_col from a BytePos 2024-07-18 20:08:38 +00:00
symbol Reformat use declarations. 2024-07-29 08:26:52 +10:00
analyze_source_file.rs Be more accurate about calculating display_col from a BytePos 2024-07-18 20:08:38 +00:00
caching_source_map_view.rs Reformat use declarations. 2024-07-29 08:26:52 +10:00
def_id.rs Reformat use declarations. 2024-07-29 08:26:52 +10:00
edit_distance.rs Reformat use declarations. 2024-07-29 08:26:52 +10:00
edition.rs Remove extern crate rustc_macros from numerous crates. 2024-04-29 10:21:54 +10:00
fatal_error.rs Auto merge of #117557 - Zoxc:panic-prio, r=petrochenkov 2023-11-09 00:39:02 +00:00
hygiene.rs Reformat use declarations. 2024-07-29 08:26:52 +10:00
lib.rs Reformat use declarations. 2024-07-29 08:26:52 +10:00
profiling.rs Reformat use declarations. 2024-07-29 08:26:52 +10:00
source_map.rs Reformat use declarations. 2024-07-29 08:26:52 +10:00
span_encoding.rs Reformat use declarations. 2024-07-29 08:26:52 +10:00
symbol.rs Rollup merge of #125048 - dingxiangfei2009:stable-deref, r=amanieu 2024-08-07 00:34:11 +02:00
tests.rs Add Span::trim_end 2024-06-04 13:11:45 +10:00