<html>
    <head>
      <base href="https://bugs.llvm.org/">
    </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 - Partial ordering of non-type template parameters with dependent types"
   href="https://bugs.llvm.org/show_bug.cgi?id=37842">37842</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Partial ordering of non-type template parameters with dependent types
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>unspecified
          </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>enhancement
          </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>zhonghao@pku.org.cn
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvm-bugs@lists.llvm.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The code is as follow:

template <class T>
struct identity
{
 typedef T type;
};

template <class T, typename T::type A>
struct foo {};

template <class T, T A>
struct foo<identity<T>, A> {};

int main()
{
 foo<identity<int>,0> bar; // error here
}

clang++ accepts the code, but g++ rejects it with error messages. Initially, I
believe that this is a bug in g++, and reported the problem
<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86193">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86193</a>

However, the programmers of g++ believe that they are correct, and clang++
shall not accept the code. Would you please check this problem, and fix it if
it is really a bug in clang?</pre>
        </div>
      </p>


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