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      <base href="https://bugs.llvm.org/">
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    <body><span class="vcard"><a class="email" href="mailto:richard-llvm@metafoo.co.uk" title="Richard Smith <richard-llvm@metafoo.co.uk>"> <span class="fn">Richard Smith</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - Invalid template parameter"
   href="https://bugs.llvm.org/show_bug.cgi?id=42213">bug 42213</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;">Resolution</td>
           <td>---
           </td>
           <td>INVALID
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>RESOLVED
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - Invalid template parameter"
   href="https://bugs.llvm.org/show_bug.cgi?id=42213#c1">Comment # 1</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED INVALID - Invalid template parameter"
   href="https://bugs.llvm.org/show_bug.cgi?id=42213">bug 42213</a>
              from <span class="vcard"><a class="email" href="mailto:richard-llvm@metafoo.co.uk" title="Richard Smith <richard-llvm@metafoo.co.uk>"> <span class="fn">Richard Smith</span></a>
</span></b>
        <pre>Clang's behavior is correct.

GCC misparsed the second parameter and somehow believes A was given only one
template argument.

MSVC and EDG/ICC are complaining that a prior function parameter was used in a
later parameter, but that can be valid (depending on the type T and what
overload resolution for operator== finds), so that error should not occur until
substitution when it should be suppressed by SFINAE.</pre>
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