<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/131058>131058</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Enum value name visibility issue with C++20 modules and GMF
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          kamrann
      </td>
    </tr>
</table>

<pre>
    Clang appears to have an issue with visibility of enums included into a module GMF.

```
// decls.h
enum {
 SomeName,
};
```
```
// module.mpp
module;

#include "decls.h"

export module mod;
```
```
// consumer.cpp
import mod;

auto a = SomeName;
```

This compiles without error - I believe incorrectly. Other implementations agree that `SomeName` is not in scope within `consumer.cpp`.
Note that Clang agrees with the other implementations under `-fmodules-reduced-bmi`. Presumably this implies that Clang is making the values visible to name lookup when the enum itself is reachable through the BMI. I couldn't find wording specifically for this case, but it certainly seems wrong intuitively.

See [compiler explorer repro](https://godbolt.org/z/oaTbGvnq6).

</pre>
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