<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/143473>143473</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [libcxxabi][llvm-cxxfilt] Demangler produces bad output for templated `operator<`
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          jeremy-rifkin
      </td>
    </tr>
</table>

<pre>
    llvm-cxxfilt and __cxa_demangle demangle `_ZltI1SEvT_S1_` as `void operator<<S>(S, S)`. Specifically, the `operator<<S>` part can be problematic for tooling attempting to parse these names since this should be tokenized as `operator` `<<` `S` `>`. While possible to disambiguate some cases, I think it would be better to demangle this specific case as `void operator< <S>(S, S)`.
</pre>
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