<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 - The code does not compile"
   href="https://bugs.llvm.org/show_bug.cgi?id=37721">37721</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>The code does not compile
          </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:

#include <iostream>

template <class P>
class ptr
{
public:
  // Picked in C++11 mode.
  template<class T>
  ptr operator- (T) const   
  {  return *this;   }
};

// Picked in default C++ mode.
template<class T1, class T2>
int operator- (const ptr<T1>&, const ptr<T2>&)
{  return 0;   }

int
main ()
{
  ptr <int> a, b;
  std::cout << (b - a) << "\n";
}

It compiles fine with g++. Indeed, the code sample comes from a previous report
<a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - attached testcase compiles in c++ mode, but not in c++11 mode"
   href="show_bug.cgi?id=12961">https://bugs.llvm.org/show_bug.cgi?id=12961</a>

The report is marked as fixed, but clang++ still does not compile the code.</pre>
        </div>
      </p>


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      <ul>
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