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New Objective-C runtime features #462

Merged
merged 3 commits into from
Jul 29, 2023
Merged

New Objective-C runtime features #462

merged 3 commits into from
Jul 29, 2023

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madsmtm
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@madsmtm madsmtm commented Jun 16, 2023

Last year, Apple improved a few things in the Objective-C runtime and clang, see this video from WWDC22. Last time I checked, these were not yet available in the open-source version of clang, though they might be by now.

We don't really have a good way to enable these automatically yet, see #266, but for now, we can implement these features behind a feature flag unstable-apple-new, for people to try them out!

TODO: Implement the optimized versions of:

  • Protocol checks
    • Not possible for us since our protocol checks are done using the runtime
  • Message sending
  • Retain and release
    • Yet unsure if completely sound
  • Autorelease elision

@madsmtm madsmtm added enhancement New feature or request A-objc2 Affects the `objc2`, `objc2-exception-helper` and/or `objc2-encode` crates labels Jun 16, 2023
@madsmtm madsmtm force-pushed the new-objc-features branch from 5bfeae1 to cb69e2a Compare June 16, 2023 14:17
@madsmtm madsmtm force-pushed the new-objc-features branch from fcd9298 to 1947278 Compare July 28, 2023 21:37
@madsmtm madsmtm merged commit 282188d into master Jul 29, 2023
@madsmtm madsmtm deleted the new-objc-features branch July 29, 2023 05:59
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A-objc2 Affects the `objc2`, `objc2-exception-helper` and/or `objc2-encode` crates enhancement New feature or request
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