<html>
    <head>
      <base href="https://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - cannot find overload for unary expression"
   href="https://llvm.org/bugs/show_bug.cgi?id=27934">27934</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>cannot find overload for unary expression
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>trunk
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>C++
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>noelgrandin@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=16433" name="attach_16433" title="self-contained test case">attachment 16433</a> <a href="attachment.cgi?id=16433&action=edit" title="self-contained test case">[details]</a></span>
self-contained test case

See attached test-case.

This is a stripped down copy of a utility library from LibreOffice codebase.

code was compiled with:

clang++  -std=c++11 testcase.cxx

and generates error:

typed_flags_testcase.cxx:253:48: error: invalid argument type 'typename
o3tl::typed_flags<ComplexTextLayoutFlags>::Wrap' to unary expression
    ComplexTextLayoutFlags n1(nOldLayoutMode &
~(ComplexTextLayoutFlags::ComplexDisabled|ComplexTextLayoutFlags::BiDiStrong));
                                              
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.</pre>
        </div>
      </p>
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