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constexpr not allowed on member function of type with a virtual base. #112016

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i-photon opened this issue Oct 11, 2024 · 4 comments
Open

constexpr not allowed on member function of type with a virtual base. #112016

i-photon opened this issue Oct 11, 2024 · 4 comments
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c++20 clang:frontend Language frontend issues, e.g. anything involving "Sema" confirmed Verified by a second party constexpr Anything related to constant evaluation rejects-valid

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@i-photon
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Virtual constexpr has been allowed since C++20.
What happened?

Here's my sentiment: https://godbolt.org/z/f8hYGYMab

This is causing a needless headache trying to re-use interfaces in constexpr.
@cor3ntin cor3ntin added c++20 clang:frontend Language frontend issues, e.g. anything involving "Sema" constexpr Anything related to constant evaluation rejects-valid confirmed Verified by a second party and removed new issue labels Oct 11, 2024
@llvmbot
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llvmbot commented Oct 11, 2024

@llvm/issue-subscribers-clang-frontend

Author: None (i-photon)

Virtual constexpr has been allowed since C++20. What happened?

Here's my sentiment: https://godbolt.org/z/f8hYGYMab

This is causing a needless headache trying to re-use interfaces in constexpr.

@llvmbot
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llvmbot commented Oct 11, 2024

@llvm/issue-subscribers-c-20

Author: None (i-photon)

Virtual constexpr has been allowed since C++20. What happened?

Here's my sentiment: https://godbolt.org/z/f8hYGYMab

This is causing a needless headache trying to re-use interfaces in constexpr.

@cor3ntin
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The restriction only applies to structors https://eel.is/c++draft/dcl.dcl#dcl.constexpr-3

@frederick-vs-ja
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Looks like a duplicate of #97266.

Virtual constexpr has been allowed since C++20.

This is unrelated to virtual base classes.

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c++20 clang:frontend Language frontend issues, e.g. anything involving "Sema" confirmed Verified by a second party constexpr Anything related to constant evaluation rejects-valid
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@cor3ntin @frederick-vs-ja @llvmbot @i-photon