hubert-reinterpretcast wrote:
> I don't believe there will be issues there.
I think the caveat is "unless the implementation attempt finds problems" (which
is all the more reason to try it).
The way the Core Issue resolution is worded, implementing it may prove to be
difficult (depending on how the existing preprocessor is structured) because,
once we interpret it as performing the check only after macros have been
replaced, the interpretation starts down the path where the check is performed
only after further directives are processed (which actually tracks with the
intent that programs that are valid pre-P1857 remain valid unless they cause
"dependency discovery" difficulties). For example:
**a.h:**
```cpp
;
```
**a.cppm:**
```cpp
export module a
#include "a.h"
```
Anyhow, even without throwing CWG2947 into the mix, stuff like this is allowed:
```cpp
export module x _Pragma("GCC warning \"Hi\"");
```
https://github.com/llvm/llvm-project/pull/107168
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