<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/63563>63563</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            clang-cl does not support concatenation of predefined identifiers
        </td>
    </tr>

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

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

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

<pre>
    According to [MSDN](https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros) `__FUNCDNAME__`, `__FUNCSIG__`, and `__FUNCTION__` are non-expandible macros defined as string literals. So, they may be concatenated with other string literals ([Compiler Explorer link](https://godbolt.org/z/eM9P1crMz)):
```cpp
extern "C" int printf(const char*, ...);

void F() {
    printf("Function name: " __FUNCTION__ "\n");
    printf("Decorated function name: " __FUNCDNAME__ "\n");
    printf("Function signature: " __FUNCSIG__ "\n");
}
```

Currently clang in ms-compatible mode does not support this.

Relevant issue: #12161
</pre>
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