Tracking Issue for #![feature(const_io_structs)]

This is a tracking issue for #![feature(const_io_structs)]

New const functions are:

io::Cursor::new
io::Cursor::get_ref
io::Cursor::position
io::empty
io::repeat
io::sink

About tracking issues

Tracking issues are used to record the overall progress of implementation.
They are also used as hubs connecting to other relevant issues, e.g., bugs or open design questions.
A tracking issue is however not meant for large scale discussion, questions, or bug reports about a feature.
Instead, open a dedicated issue for the specific matter and add the relevant feature gate label.

Steps

Implementation (Make some std::io functions const #78811)
FCP
Stabilization PR

Rollup merge of rust-lang#78811 - a1phyr:const_io_structs, r=dtolnay

@dtolnay

Are there any blockers for these? They appear to all have straightforward implementations that should work on stable.

CC @dtolnay who r+'d the original PR

Hey, I'd love to have this if we can make it stable. This would make it possible to, e.g., create "global" spooled temporary files without lazy_static:

static BUFFER: Mutex<SpooledTempFile> = Mutex::new(tempfile::SpooledTempFile::new(1024 * 1024));

@rfcbot

@rust-lang/libs-api:
@rfcbot fcp merge

const for the following already-stable functions:

@dtolnay

Team member @dtolnay has proposed to merge this. The next step is review by the rest of the tagged team members:

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

See this document for info about what commands tagged team members can give me.

🔔 This is now entering its final comment period, as per the review above. 🔔

All of these lgtm from a @rust-lang/wg-const-eval perspective. they are just trivial accessors or constructor funcions

The final comment period, with a disposition to merge, as per the review above, is now complete.

As the automated representative of the governance process, I would like to thank the author for their work and everyone else who contributed.

This will be merged soon.

Rollup merge of rust-lang#124049 - slanterns:const_io_structs_stabili…

Unrolled build for rust-lang#124049

Rollup merge of #124049 - slanterns:const_io_structs_stabilize, r=jhp…

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Tracking Issue for `#![feature(const_io_structs)]` #78812

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Tracking Issue for #![feature(const_io_structs)] #78812

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jhpratt commented on Apr 20, 2021

Stebalien commented on Aug 18, 2023

dtolnay commented on Apr 5, 2024

rfcbot commented on Apr 5, 2024

3 remaining items

rfcbot commented on Apr 6, 2024

oli-obk commented on Apr 6, 2024

rfcbot commented on Apr 16, 2024

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Tracking Issue for `#![feature(const_io_structs)]` #78812