demo of moving std::io::Error to core

[programmerjake]

I mostly wanted to show my idea for how to move std::io::Error to core. I use AtomicPtr to fill in the parts that are needed from alloc/std, but that should probably be replaced with something like #[panic_handler] or #[global_allocator] except where it resolves to a null pointer instead of erroring if not provided.

I am not very likely to finish this off due to lack of time, so, anyone who wants to, feel free to base your code on mine.

[rustbot]

r? @cuviper

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[cuviper]

afaict there's only one place core::io::Error::new is defined,

I think it's because the incoherent impl is added in two alloc compilations, cfg(test) and cfg(not(test)).

[rust-log-analyzer]

The job x86_64-gnu-llvm-15 failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

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##[group]Building stage0 tool linkchecker (x86_64-unknown-linux-gnu)
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##[group]Testing stage0 Linkcheck (x86_64-unknown-linux-gnu)
core/io/error_internals/type.Result.html:248: broken link - `core/std/error/index.html`
core/io/error_internals/type.Result.html:250: broken link - `core/std/error/index.html`
number of HTML files scanned: 34873
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[lygstate]

looks good to me

[bors]

☔ The latest upstream changes (presumably #117736) made this pull request unmergeable. Please resolve the merge conflicts.

[cuviper]

I'm clearing this from my queue while it's in draft, but you can use ready when you are.

@rustbot author

[Dylan-DPC]

@programmerjake any updates on this? thanks

[programmerjake]

@programmerjake any updates on this? thanks

as stated on the top comment:

I am not very likely to finish this off due to lack of time, so, anyone who wants to, feel free to base your code on mine.

my lack of time hasn't changed.

[Dylan-DPC]

Thanks for the update. I'm going close this since it will remain inactive and bitrot (already has). When you have the time you can reöpen or preferably create a new pr and link to this one.