rust/library/alloc/src, branch beta

Revert "Auto merge of #144086 - clubby789:alloc-zeroed, r=nikic"

2025-09-25T14:36:51+00:00

This reverts commit 040a98af70f0a7da03f3d5356531b28a2a7a77e4, reversing changes made to e8a792daf500b5ff8097896ddb6cc037abe92487.

Update CURRENT_RUSTC_VERSION post-bump

2025-09-14T18:43:32+00:00

Rollup merge of #145471 - rs-sac:extr, r=the8472

2025-09-13T07:26:02+00:00

Stabilize BTree{Map,Set}::extract_if Tracking issue: rust-lang/rust#70530 FCP completed: https://github.com/rust-lang/rust/issues/70530#issuecomment-3191454465 Closes: rust-lang/rust#70530

optimization: Don't include ASCII characters in Unicode tables

2025-09-07T13:21:24+00:00

The ASCII subset of Unicode is fixed and will never change, so we don't need to generate tables for it with every new Unicode version. This saves a few bytes of static data and speeds up `char::is_control` and `char::is_grapheme_extended` on ASCII inputs. Since the table lookup functions exported from the `unicode` module will give nonsensical errors on ASCII input (and in fact will panic in debug mode), I had to add some private wrapper methods to `char` which check for ASCII-ness first.

Rollup merge of #145750 - btj:drop-alloc-guard, r=tgross35

2025-09-04T00:01:53+00:00

raw_vec.rs: Remove superfluous fn alloc_guard `alloc_guard` checks that its argument is at most `isize::MAX`, but it is called only with layout sizes, which are already guaranteed to be at most `isize::MAX`.

Rollup merge of #145279 - clarfonthey:const-convert-initial, r=tgross35

2025-09-03T13:08:06+00:00

Constify conversion traits (part 1) This is the first part of rust-lang/rust#144289 being split into smaller pieces. It adds/moves constness of several traits under the `const_convert` feature: * `From` * `Into` * `TryFrom` * `TryInto` * `FromStr` * `AsRef` * `AsMut` * `Borrow` * `BorrowMut` * `Deref` * `DerefMut` There are a few methods that are intrinsically tied to these traits which I've included in the feature. Particularly, those which are wrappers over `AsRef`: * `ByteStr::new` (unstable under `bstr` feature) * `OsStr::new` * `Path::new` Those which directly use `Into`: * `Result::into_ok` * `Result::into_err` And those which use `Deref` and `DerefMut`: * `Pin::as_ref` * `Pin::as_mut` * `Pin::as_deref_mut` * `Option::as_deref` * `Option::as_deref_mut` * `Result::as_deref` * `Result::as_deref_mut` (note: the `Option` and `Result` methods were suggested by ``@npmccallum`` initially as rust-lang/rust#146101) The parts which are missing from this PR are: * Anything that involves heap-allocated types * Making any method const than the ones listed above * Anything that could rely on the above, *or* could rely on system-specific code for `OsStr` or `Path` (note: this mostly makes these methods useless since `str` doesn't implement `AsRef` yet, but it's better to track the method for now and add impls later, IMHO) r? ``@tgross35`` (who mostly already reviewed this)

raw_vec.rs: Remove superfluous fn alloc_guard

2025-09-03T05:34:32+00:00

It checks that its argument is at most isize::MAX, but it is called only with layout sizes, which are already guaranteed to be at most isize::MAX.

Constify conversion traits

2025-09-02T01:38:26+00:00

Rollup merge of #145592 - nilotpal-n7:fix-format-alignment, r=lcnr

2025-08-31T11:40:35+00:00

Fix format string grammar in docs and improve alignment error message for #144023 This PR improves error messages and documentation for format strings involving alignment and formatting traits. Highlights: - Clearer error messages for invalid alignment specifiers (e.g., `{0:#X>18}`), showing the expected `<`, `^`, or `>` and a working example: println!("{0:>#18X}", value); - Updated UI test `format-alignment-hash.rs` to reflect the improved error output. - Documentation clarification: ensures examples correctly show how width, alignment, and traits like `x`, `X`, `#` combine. Motivation: Previously, using `#` with alignment and width produced confusing errors. This PR guides users on the correct syntax and provides actionable examples. Testing: - Built the compiler (`./x build`) - Blessed and ran UI tests (`./x. test src/test/ui/fmt/format-alignment-hash.rs --bless`) - Verified full test suite passes (`./x test`) Issue: rust-lang/rust#144023

Stabilize BTree{Map,Set}::extract_if

2025-08-27T18:34:31+00:00