[ClangImporter] Look through __ended_by and __null_terminated (#81630) #82003
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…ang#81630) Previously we would not import decls containing these types. This was not an issue, because they can only occur when -fbounds-safety or -fexperimental-bounds-safety-attributes is passed to clang. When SafeInteropWrappers is enabled we pass -fexperimental-bound-safety-attributes to clang however, so these types can now occur without the user specifying any -Xcc flags. rdar://151611718 (cherry picked from commit ac068c2)
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@swift-ci please test |
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@swift-ci please test |
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@swift-ci please test |
DougGregor
approved these changes
Jun 6, 2025
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Explanation:
Previously we would not import decls containing
__null_terminatedor__ended_by. This was not an issue, because they can only occur when -fbounds-safety or -fexperimental-bounds-safety-attributes is passed to clang. When SafeInteropWrappers is enabled we pass-fexperimental-bound-safety-attributes to clang however, so these types can now occur without the user specifying any -Xcc flags.
Scope:
Variables and functions previously marked unavailable may now be available.
Issues:
rdar://151611718
Original PRs:
[ClangImporter] Look through __ended_by and __null_terminated #81630
Risk:
Low, this just strips pointer type sugar
Testing:
Added lots of (positive and negative) test cases of importing declarations with bounds information.
Reviewers:
@egorzhdan