Move `std::io::BufRead` to `alloc::io` by bushrat011899 · Pull Request #158546 · rust-lang/rust

bushrat011899 · 2026-06-29T05:42:08Z

ACP: rust-lang/libs-team#755
Tracking issue: #154046
Split From: #156527
~~Blocked On: #158545~~

Description

Moves std::io::BufRead to alloc::io. This is effectively a direct cut and paste, but with a large diff due to how many implementations need to be moved into alloc. Blocked on #158545.

Notes

No AI tooling of any kind was used during the creation of this PR.
Please see Tracking Issue for alloc::io and core::io #154046 (comment) for a review order and broader context for this PR.

rustbot · 2026-06-29T05:42:13Z

r? @clarfonthey

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Owners of files modified in this PR: @ChrisDenton, libs
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bushrat011899 · 2026-06-29T05:42:19Z

@rustbot blocked

rustbot · 2026-07-18T21:38:13Z

This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.

bushrat011899 · 2026-07-18T21:42:02Z

Congratulations Clar Fon, you're already assigned this one!
@rustbot ready

Label was from the blocked earlier version of this PR.
@rustbot label -T-compiler

The rustdoc labels are just because one of the tests has a slightly different path now that a buffered item is now defined in alloc. Otherwise, this is the most straightforward trait move.

clarfonthey · 2026-07-18T23:18:54Z

Seems straightforward, minus one small thing. Otherwise LGTM.

More consistent with the default functions for `Read` Co-Authored-By: Clar Fon <15850505+clarfonthey@users.noreply.github.com>

clarfonthey · 2026-07-19T03:42:13Z

@bors r+

rust-bors · 2026-07-19T03:42:16Z

📌 Commit 7c0c4ef has been approved by clarfonthey

It is now in the queue for this repository.

…clarfonthey Move `std::io::BufRead` to `alloc::io` ACP: rust-lang/libs-team#755 Tracking issue: rust-lang#154046 Split From: rust-lang#156527 ~~Blocked On: rust-lang#158545 ## Description Moves `std::io::BufRead` to `alloc::io`. This is effectively a direct cut and paste, but with a large diff due to how many implementations need to be moved into `alloc`. Blocked on rust-lang#158545. --- ## Notes * No AI tooling of any kind was used during the creation of this PR. * Please see rust-lang#154046 (comment) for a review order and broader context for this PR.

Rollup of 3 pull requests Successful merges: - #159188 (Always generate private and hidden items in JSON docs of the stdlib) - #158546 (Move `std::io::BufRead` to `alloc::io`) - #159372 (Remove SIZE generic param from DisplayBuffer in core::net)

…clarfonthey Move `std::io::BufRead` to `alloc::io` ACP: rust-lang/libs-team#755 Tracking issue: rust-lang#154046 Split From: rust-lang#156527 ~~Blocked On: rust-lang#158545 ## Description Moves `std::io::BufRead` to `alloc::io`. This is effectively a direct cut and paste, but with a large diff due to how many implementations need to be moved into `alloc`. Blocked on rust-lang#158545. --- ## Notes * No AI tooling of any kind was used during the creation of this PR. * Please see rust-lang#154046 (comment) for a review order and broader context for this PR.

Rollup of 5 pull requests Successful merges: - #158546 (Move `std::io::BufRead` to `alloc::io`) - #159372 (Remove SIZE generic param from DisplayBuffer in core::net) - #159548 (miri subtree update) - #159508 (Some cleanup in `rustc_attr_parsing`) - #159539 ([rustc_abi] Customize `Debug` for `Primitive` and `Scalar`)

Rollup merge of #158546 - bushrat011899:alloc_io_bufread, r=clarfonthey Move `std::io::BufRead` to `alloc::io` ACP: rust-lang/libs-team#755 Tracking issue: #154046 Split From: #156527 ~~Blocked On: #158545 ## Description Moves `std::io::BufRead` to `alloc::io`. This is effectively a direct cut and paste, but with a large diff due to how many implementations need to be moved into `alloc`. Blocked on #158545. --- ## Notes * No AI tooling of any kind was used during the creation of this PR. * Please see #154046 (comment) for a review order and broader context for this PR.

rustbot assigned clarfonthey Jun 29, 2026

rustbot added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Jun 29, 2026

rustbot added S-blocked Status: Blocked on something else such as an RFC or other implementation work. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jun 29, 2026

This was referenced Jun 29, 2026

Tracking Issue for alloc::io and core::io #154046

Open

Move std::io::buffered to alloc::io #158547

Open