| Issue |
149041
|
| Summary |
[Clang] -Winvalid-constexpr misbehaves in C++23 mode
|
| Labels |
clang:frontend,
regression,
rejects-valid,
constexpr
|
| Assignees |
|
| Reporter |
frederick-vs-ja
|
In C++23/26 mode, Clang rejects the following function definition with `-Winvalid-constexpr` used, saying "constexpr function never produces a constant _expression_". [Godbolt link](https://godbolt.org/z/WaKPMjorP).
```C++
constexpr bool fun(const bool& b) { return b; }
```
This seems related to [P2280R4](https://wg21.link/p2280r4), but the incorrect diagnostic occurs only since Clang 21.
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