| Issue |
182123
|
| Summary |
clang 22 no longer accepts `constexpr` assignment of microsoft-cast
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
ZacharyHenkel
|
The following was accepted in clang 21 with `-fms-extensions -fms-compatibility` and is accepted in msvc natively.
```
int square(int num) {
return num * num;
}
constexpr void* p = square;
```
Output:
```
<source>:6:21: warning: implicit conversion between pointer-to-function and pointer-to-object is a Microsoft extension [-Wmicrosoft-cast]
6 | constexpr void* p = square;
```
In clang 22 rc2 Output:
```
<source>:6:21: warning: implicit conversion between pointer-to-function and pointer-to-object is a Microsoft extension [-Wmicrosoft-cast]
6 | constexpr void* p = square;
| ^~~~~~
<source>:6:17: error: constexpr variable 'p' must be initialized by a constant _expression_
6 | constexpr void* p = square;
| ^ ~~~~~~
<source>:6:21: note: cast that performs the conversions of a reinterpret_cast is not allowed in a constant _expression_
6 | constexpr void* p = square;
| ^
```
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