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Lancern opened this issue Oct 15, 2024 · 0 comments · Fixed by #1424
Closed

Add support for member pointer casting #973

Lancern opened this issue Oct 15, 2024 · 0 comments · Fixed by #1424
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Lancern commented Oct 15, 2024

Given class types Base and Derived, assume Base is a public non-ambiguous non-virtual base class of Derived, there are 4 valid ways to cast relevant member pointers:

  • Casts on pointer to data members:
    • Implicit cast from T Base::* to T Derived::*
    • Explicit cast from T Derived::* to T Base::*
  • Casts on pointer to member functions:
    • Implicit cast from Ret (Base::*)(Args) to Ret (Derived::*)(Args)
    • Explicit cast from Ret (Derived::*)(Args) to Ret (Base::*)(Args)

This issue tracks the implementation status of these 4 cast types.
@Lancern Lancern self-assigned this Oct 15, 2024
@seven-mile seven-mile added the enhancement New feature or request label Nov 18, 2024
@Lancern Lancern mentioned this issue Nov 30, 2024
Merged
bcardosolopes pushed a commit that referenced this issue Dec 2, 2024
@Lancern
[CIR] Add support for casting pointer-to-data-member values (#1188)
eacaabb 
This PR adds support for base-to-derived and derived-to-base casts on
pointer-to-data-member values.

Related to #973.
@Lancern Lancern linked a pull request Feb 28, 2025 that will close this issue
[CIR] Base-to-derived and derived-to-base casts on pointers to member functions #1424
Merged
@Lancern Lancern mentioned this issue Feb 28, 2025
Merged
Lancern added a commit that referenced this issue Mar 1, 2025
@Lancern
[CIR] Base-to-derived and derived-to-base casts on pointers to member…
2ab0704 
… functions (#1424)

This PR adds CIRGen and LLVM lowering support for base-to-derived and
derived-to-base cast operations on pointers to member functions.

This PR includes a new operation `cir.update_member` to help the LLVM
lowering procedure of such cast operations.

Resolve #973 .
lanza pushed a commit that referenced this issue Mar 18, 2025
@Lancern @lanza
[CIR] Add support for casting pointer-to-data-member values (#1188)
b11f2b0 
This PR adds support for base-to-derived and derived-to-base casts on
pointer-to-data-member values.

Related to #973.
lanza pushed a commit that referenced this issue Mar 18, 2025
@Lancern @lanza
[CIR] Base-to-derived and derived-to-base casts on pointers to member…
b2212ac 
… functions (#1424)

This PR adds CIRGen and LLVM lowering support for base-to-derived and
derived-to-base cast operations on pointers to member functions.

This PR includes a new operation `cir.update_member` to help the LLVM
lowering procedure of such cast operations.

Resolve #973 .
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[CIR] Base-to-derived and derived-to-base casts on pointers to member functions Lancern/clangir
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@Lancern @seven-mile