<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/151468>151468</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [Clang] Clang and GCC diverge on parsing `new (std::nothrow_t())`
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang
      </td>
    </tr>

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

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

<pre>
    ## Description:
I'm seeking clarification on whether the following code is well-formed C++.  
GCC accepts it, but Clang rejects it with:  
`error: cannot allocate function type 'std::nothrow_t ()' with new`

## Program
```cpp
#include <new>

int main() {
    char* p = new (std::nothrow_t()) char[1];
    return 0;
}
```

Is this a parsing difference, or is one compiler incorrect?
Repro: https://godbolt.org/z/17zfedxds
</pre>
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