[Bug c++/56679] New: [C++11] Cannot take sizeof... a template template parameter pack

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56679



             Bug #: 56679

           Summary: [C++11] Cannot take sizeof... a template template

                    parameter pack

    Classification: Unclassified

           Product: gcc

           Version: 4.6.4

            Status: UNCONFIRMED

          Keywords: rejects-valid

          Severity: normal

          Priority: P3

         Component: c++

        AssignedTo: unassig...@gcc.gnu.org

        ReportedBy: r...@gcc.gnu.org





All versions from 4.4 to trunk reject this:



  template <template <typename> class... Args>

  struct Foo {

    static const int value = sizeof...(Args);

  };



  template <typename> struct Bar { };



  const int test = Foo<Bar>::value;





v.cc:3:44: error: missing template arguments before ')' token

     static const int value = sizeof...(Args);

                                            ^





Clang and ICC compile it ok.