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      <base href="https://bugs.llvm.org/">
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    <body><span class="vcard"><a class="email" href="mailto:hstong@ca.ibm.com" title="hstong@ca.ibm.com">hstong@ca.ibm.com</a>
</span> changed
          <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - non-bool expression allowed in requires clause"
   href="https://bugs.llvm.org/show_bug.cgi?id=45219">bug 45219</a>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>RESOLVED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">CC</td>
           <td>
                
           </td>
           <td>hstong@ca.ibm.com
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>---
           </td>
           <td>INVALID
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - non-bool expression allowed in requires clause"
   href="https://bugs.llvm.org/show_bug.cgi?id=45219#c1">Comment # 1</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - non-bool expression allowed in requires clause"
   href="https://bugs.llvm.org/show_bug.cgi?id=45219">bug 45219</a>
              from <span class="vcard"><a class="email" href="mailto:hstong@ca.ibm.com" title="hstong@ca.ibm.com">hstong@ca.ibm.com</a>
</span></b>
        <pre>Please explain your reasoning.

int::operator int
is an invalid expression resulting from substitution, which means that the
constraint is not satisfied.

[temp.constr.atomic] paragraph 3 requires a constant expression of type bool
only after substitution results in an otherwise valid expression.</pre>
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