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[SR-12471] [C++] Populate value witness tables for C++ types #54911

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swift-ci opened this issue Mar 31, 2020 · 2 comments
Open

[SR-12471] [C++] Populate value witness tables for C++ types #54911

swift-ci opened this issue Mar 31, 2020 · 2 comments
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c++ interop Feature: Interoperability with C++ compiler The Swift compiler in itself IRGen LLVM IR generation new feature

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@swift-ci
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Previous ID SR-12471
Radar rdar://problem/62201099
Original Reporter MForster (JIRA User)
Type New Feature
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels New Feature, CxxInterop, IRGen
Assignee None
Priority Medium

md5: 109e38b3d31add61db25aa689758634e

blocks:

  • SR-12540 [C++] Import class template instantiations

relates to:

  • SR-12797 [C++] IRGen should lower value operations on C++ types correctly

Issue Description:

The Swift compiler should generate correct witness tables for C++ types, calling special members of the C++ type as appropriate.
@swift-ci
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Comment by Michael Forster (JIRA)

This actually seems easier to do than getting constructors right because a) there is no SIL involved, and b) we have direct access to the CXXRecordDecl in the place where we need to populate the value witness table.

@beccadax
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@swift-ci create

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@zoecarver zoecarver added c++ interop Feature: Interoperability with C++ and removed CxxInterop labels Apr 25, 2022
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c++ interop Feature: Interoperability with C++ compiler The Swift compiler in itself IRGen LLVM IR generation new feature
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@beccadax @zoecarver @swift-ci