<html>
    <head>
      <base href="http://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 --- - Non-type parameter link failure"
   href="http://llvm.org/bugs/show_bug.cgi?id=15858">15858</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Non-type parameter link failure
          </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++11
          </td>
        </tr>

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

        <tr>
          <th>Reporter</th>
          <td>kjw.chiu@gmail.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>When using decltype on a function pointer template parameter to define
a data member, it seems to generate an incorrect external reference.
This code:

    template <typename R, typename P, R F(P)>
    struct B {
        B() { v = F; }
        decltype(F) v;
    };

    void foo(int) {}

    int main() {
        B<void, int, &foo> o;
    }

results in this error:

    $ clang++ --version
    clang version 3.3 (trunk 180631)
    Target: x86_64-unknown-linux-gnu
    Thread model: posix
    $ clang++ -std=c++11 bug.cpp
    /tmp/bug-FYJpAX.o: In function `B<void, int, &(foo(int))>::B()':
   
bug.cpp:(.text._ZN1BIviXadL_Z3fooiEEEC2Ev[_ZN1BIviXadL_Z3fooiEEEC2Ev]+0x14):
undefined reference to `B<void, int, &(foo(int))>::v'
    clang: error: linker command failed with exit code 1 (use -v to see
invocation)

The compiler seems to have treated v as if it were a static data member.</pre>
        </div>
      </p>
      <hr>
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