<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/95936>95936</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Clang incorrectly accepts GCC statement-expression in template-argument lists
        </td>
    </tr>

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

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

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

<pre>
    https://github.com/llvm/llvm-project/labels/extension%3Agnu https://github.com/llvm/llvm-project/labels/accepts-invalid https://github.com/llvm/llvm-project/labels/clang%3Afrontend, I think

```c++
template<bool b>
void square() {}

void cube()
{
    square<({ 2+2==4; })>();
}
```
Clang instantiates square<true>(), but GCC says `<source>:6:12: error: statement-expressions are not allowed outside functions nor in template-argument lists`. https://godbolt.org/z/nbKr1soen

This is a GCC extension, so if they say it's not valid, then it isn't. (Unless Clang wants to have extensions to GCC extensions, but if so, it should probably have a -pedantic warning or something.)
</pre>
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