<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/140085>140085</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [clang-doc] Use ExitOnError over manually handling exit conditions
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            good first issue,
            clang-doc
      </td>
    </tr>

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

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

<pre>
    clang-doc uses a lot of manual error checks, most of which exit the program, particularly when opening or manipulating files. We should prefer automated facilities, like `llvm:: ExitOnError` to do this in a consistent manner, and improve maintainability.
</pre>
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