Re: [sigc] libsigc++ 1.9.13 fails on Solaris 9 sparc

[Martin Schulze <martin-ml hippogriff de>]

Am 2004.02.27 13:39 schrieb(en) Damien Carbery:
> Mmm, don't know what happened there.
> I hadn't used the patch. I did a 'make clean; make' after using the  
> patch and it seems to get further.
>
> "../sigc++/visit_each.h", line 113: Error: Overloading ambiguity  
> between "print::operator()<A>(A*) const" and "print::operator()<A*> 
> (A*const&) const".

Well, he is right about this. Funny that gcc and MS .NET are more  
tolerant about it. The test needed to be updated, anyway. I'm attaching
the corrected file. You can simply replace the old one. I already
committed to cvs. Please try again ...

Thanks!

 Martin

> Full log attached.
>
>
> Martin Schulze wrote:
> > Hi Damien!
> >
> > My inbox shows that you wrote a response on Tuesday but
> > you didn't seem to write any text into your mail?!
> > Could you post again, please?
> >
> > Regards,
> >
> >  Martin
> >
> > Am 2004.02.24 20:48 schrieb(en) Damien Carbery:
> >
> > > Am 2004.02.24 13:20 schrieb(en) martin-ml hippogriff de:
> > >
> > > > Am 24.02.2004 um 10:46 Uhr haben Sie geschrieben:
> > > > > That one is good. Output of resulting executable attached.
> > > > >
> > > >
> > > > Perfect. I will change the is_base_and_derived template in cvs
> > > > accordingly this evening. We have to make sure that this doesn't   
> > > > break
> > > > the MS .NET compiler. Can someone with access to MS .NET check   
> > > > whether
> > > > the file attached to my last mail compiles and post the output of   
> > > > the
> > > > executable, please?
> > >
> > >
> > > Committed to cvs. A patch attached; it's a trivial change after  
> > > all.
> > > Damien, could you give it another try after applying the patch,   
> > > please?
> > >
> > > Regards,
> > >
> > >  Martin> Index: ChangeLog
> > > ===================================================================
> > > RCS file: /cvs/gnome/libsigc++2/ChangeLog,v
> > > retrieving revision 1.80
> > > diff -u -3 -r1.80 ChangeLog
> > > --- ChangeLog    19 Feb 2004 21:05:04 -0000    1.80
> > > +++ ChangeLog    24 Feb 2004 19:44:15 -0000
> > > @@ -1,3 +1,7 @@
> > > +2004-02-24  Martin Schulze  <teebaum cvs gnome org>
> > > +
> > > +  * sigc++/type_traits.h: Make is_base_and_derived<> work with the
> > > SUN Forte.
> > > +
> > >  2004-02-19  Martin Schulze  <teebaum cvs gnome org>
> > >
> > >    * sigc++/type_traits.h: Make is_base_and_derived<> platform
> > > independant.
> > > Index: sigc++/type_traits.h
> > > ===================================================================
> > > RCS file: /cvs/gnome/libsigc++2/sigc++/type_traits.h,v
> > > retrieving revision 1.8
> > > diff -u -3 -r1.8 type_traits.h
> > > --- sigc++/type_traits.h    19 Feb 2004 21:05:09 -0000    1.8
> > > +++ sigc++/type_traits.h    24 Feb 2004 19:44:16 -0000
> > > @@ -107,7 +107,7 @@
> > >    };
> > >
> > >    struct test {
> > > -    static big  is_base_class_(const void*);
> > > +    static big  is_base_class_(...);
> > >      static char is_base_class_(typename type_trait<T_base>::  
> > > pointer);
> > >    };
>
> --
> Damien Carbery
> Desktop Release Engineer
> Sun Microsystems
>
> Email: damien carbery sun com
> Ph: +353 1 819-9218
> Ext: x 19218
>
> Dublin Bus and Irish Rail timetables for your Palm:
> http://bussched.sourceforge.net> Making all in sigc++
> make[1]: Entering directory `/export/home/gnome/2.4/nightly/libsigc/ 
> libsigc++2/sigc++'
> make  all-am
> make[2]: Entering directory `/export/home/gnome/2.4/nightly/libsigc/ 
> libsigc++2/sigc++'
> source='signal.cc' object='signal.lo' libtool=yes \
> depfile='.deps/signal.Plo' tmpdepfile='.deps/signal.TPlo' \
> depmode=none /bin/bash ../depcomp \
> /bin/bash ../libtool --mode=compile CC -DPACKAGE_NAME=\"\"
> -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\"
> -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++\" -DVERSION=\"1.9.14\"
> -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1
> -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1
> -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_UNISTD_H=1
> -DHAVE_DLFCN_H=1    -I.. -I.. -I/opt/gnome-2.4/include  -g -c -o
> signal.lo `test -f 'signal.cc' || echo './'`signal.cc
> mkdir .libs
>  CC -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
> -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++ 
> \"
> -DVERSION=\"1.9.14\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
> -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
> -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
> -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -I.. -I.. -I/opt/gnome-2.4/include
> -g -c signal.cc  -KPIC -DPIC -o .libs/signal.o
>  CC -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
> -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++ 
> \"
> -DVERSION=\"1.9.14\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
> -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
> -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
> -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -I.. -I.. -I/opt/gnome-2.4/include
> -g -c signal.cc -o signal.o >/dev/null 2>&1
> source='trackable.cc' object='trackable.lo' libtool=yes \
> depfile='.deps/trackable.Plo' tmpdepfile='.deps/trackable.TPlo' \
> depmode=none /bin/bash ../depcomp \
> /bin/bash ../libtool --mode=compile CC -DPACKAGE_NAME=\"\"
> -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\"
> -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++\" -DVERSION=\"1.9.14\"
> -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1
> -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1
> -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_UNISTD_H=1
> -DHAVE_DLFCN_H=1    -I.. -I.. -I/opt/gnome-2.4/include  -g -c -o
> trackable.lo `test -f 'trackable.cc' || echo './'`trackable.cc
>  CC -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
> -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++ 
> \"
> -DVERSION=\"1.9.14\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
> -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
> -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
> -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -I.. -I.. -I/opt/gnome-2.4/include
> -g -c trackable.cc  -KPIC -DPIC -o .libs/trackable.o
>  CC -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
> -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++ 
> \"
> -DVERSION=\"1.9.14\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
> -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
> -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
> -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -I.. -I.. -I/opt/gnome-2.4/include
> -g -c trackable.cc -o trackable.o >/dev/null 2>&1
> source='connection.cc' object='connection.lo' libtool=yes \
> depfile='.deps/connection.Plo' tmpdepfile='.deps/connection.TPlo' \
> depmode=none /bin/bash ../depcomp \
> /bin/bash ../libtool --mode=compile CC -DPACKAGE_NAME=\"\"
> -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\"
> -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++\" -DVERSION=\"1.9.14\"
> -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1
> -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1
> -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_UNISTD_H=1
> -DHAVE_DLFCN_H=1    -I.. -I.. -I/opt/gnome-2.4/include  -g -c -o
> connection.lo `test -f 'connection.cc' || echo './'`connection.cc
>  CC -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
> -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++ 
> \"
> -DVERSION=\"1.9.14\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
> -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
> -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
> -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -I.. -I.. -I/opt/gnome-2.4/include
> -g -c connection.cc  -KPIC -DPIC -o .libs/connection.o
>  CC -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
> -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++ 
> \"
> -DVERSION=\"1.9.14\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
> -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
> -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
> -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -I.. -I.. -I/opt/gnome-2.4/include
> -g -c connection.cc -o connection.o >/dev/null 2>&1
> source='functors/slot.cc' object='slot.lo' libtool=yes \
> depfile='.deps/slot.Plo' tmpdepfile='.deps/slot.TPlo' \
> depmode=none /bin/bash ../depcomp \
> /bin/bash ../libtool --mode=compile CC -DPACKAGE_NAME=\"\"
> -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\"
> -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++\" -DVERSION=\"1.9.14\"
> -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1
> -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1
> -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_UNISTD_H=1
> -DHAVE_DLFCN_H=1    -I.. -I.. -I/opt/gnome-2.4/include  -g -c -o
> slot.lo `test -f 'functors/slot.cc' || echo './'`functors/slot.cc
>  CC -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
> -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++ 
> \"
> -DVERSION=\"1.9.14\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
> -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
> -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
> -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -I.. -I.. -I/opt/gnome-2.4/include
> -g -c functors/slot.cc  -KPIC -DPIC -o .libs/slot.o
>  CC -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
> -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++ 
> \"
> -DVERSION=\"1.9.14\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
> -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
> -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
> -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -I.. -I.. -I/opt/gnome-2.4/include
> -g -c functors/slot.cc -o slot.o >/dev/null 2>&1
> source='adaptors/lambda/lambda.cc' object='lambda.lo' libtool=yes \
> depfile='.deps/lambda.Plo' tmpdepfile='.deps/lambda.TPlo' \
> depmode=none /bin/bash ../depcomp \
> /bin/bash ../libtool --mode=compile CC -DPACKAGE_NAME=\"\"
> -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\"
> -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++\" -DVERSION=\"1.9.14\"
> -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1
> -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1
> -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_UNISTD_H=1
> -DHAVE_DLFCN_H=1    -I.. -I.. -I/opt/gnome-2.4/include  -g -c -o
> lambda.lo `test -f 'adaptors/lambda/lambda.cc' || echo
> './'`adaptors/lambda/lambda.cc
>  CC -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
> -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++ 
> \"
> -DVERSION=\"1.9.14\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
> -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
> -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
> -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -I.. -I.. -I/opt/gnome-2.4/include
> -g -c adaptors/lambda/lambda.cc  -KPIC -DPIC -o .libs/lambda.o
>  CC -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\"
> -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE=\"libsigc++ 
> \"
> -DVERSION=\"1.9.14\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1
> -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1
> -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1
> -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -I.. -I.. -I/opt/gnome-2.4/include
> -g -c adaptors/lambda/lambda.cc -o lambda.o >/dev/null 2>&1
> /bin/bash ../libtool --mode=link CC  -g  -i -L/opt/gnome-2.4/lib
> -R/opt/gnome-2.4/lib -o libsigc-2.0.la -rpath /usr/local/lib
> signal.lo trackable.lo connection.lo slot.lo lambda.lo
> CC -G -nolib -hlibsigc-2.0.so.0 -o .libs/libsigc-2.0.so.0.0.0
> .libs/signal.o .libs/trackable.o .libs/connection.o .libs/slot.o
> .libs/lambda.o  -R/opt/gnome-2.4/lib -L/opt/gnome-2.4/lib
> (cd .libs && rm -f libsigc-2.0.so.0 && ln -s libsigc-2.0.so.0.0.0
> libsigc-2.0.so.0)
> (cd .libs && rm -f libsigc-2.0.so && ln -s libsigc-2.0.so.0.0.0
> libsigc-2.0.so)
> CC -xar -o .libs/libsigc-2.0.a   signal.o trackable.o connection.o
> slot.o lambda.o
> creating libsigc-2.0.la
> (cd .libs && rm -f libsigc-2.0.la && ln -s ../libsigc-2.0.la
> libsigc-2.0.la)
> make[2]: Leaving directory `/export/home/gnome/2.4/nightly/libsigc/ 
> libsigc++2/sigc++'
> make[1]: Leaving directory `/export/home/gnome/2.4/nightly/libsigc/ 
> libsigc++2/sigc++'
> Making all in tests
> make[1]: Entering directory `/export/home/gnome/2.4/nightly/libsigc/ 
> libsigc++2/tests'
> source='test_trackable.cc' object='test_trackable.o' libtool=no \
> depfile='.deps/test_trackable.Po' tmpdepfile='.deps/test_trackable. 
> TPo'
> \
> depmode=none /bin/bash ../depcomp \
> CC  -I. -I. -I.. -I..  -I/opt/gnome-2.4/include  -g -c -o
> test_trackable.o `test -f 'test_trackable.cc' || echo
> './'`test_trackable.cc
> /bin/bash ../libtool --mode=link CC  -g  -i -L/opt/gnome-2.4/lib
> -R/opt/gnome-2.4/lib -o test_trackable  test_trackable.o
> ../sigc++/libsigc-2.0.la
> mkdir .libs
> CC -g -i -o .libs/test_trackable test_trackable.o
> -L/opt/gnome-2.4/lib ../sigc++/.libs/libsigc-2.0.so -R/usr/local/lib
> -R/opt/gnome-2.4/lib
> creating test_trackable
> source='test_deduce_result_type.cc' object='test_deduce_result_type. 
> o'
> libtool=no \
> depfile='.deps/test_deduce_result_type.Po'
> tmpdepfile='.deps/test_deduce_result_type.TPo' \
> depmode=none /bin/bash ../depcomp \
> CC  -I. -I. -I.. -I..  -I/opt/gnome-2.4/include  -g -c -o
> test_deduce_result_type.o `test -f 'test_deduce_result_type.cc' ||
> echo './'`test_deduce_result_type.cc
> /bin/bash ../libtool --mode=link CC  -g  -i -L/opt/gnome-2.4/lib
> -R/opt/gnome-2.4/lib -o test_deduce_result_type
> test_deduce_result_type.o ../sigc++/libsigc-2.0.la
> CC -g -i -o .libs/test_deduce_result_type test_deduce_result_type.o
> -L/opt/gnome-2.4/lib ../sigc++/.libs/libsigc-2.0.so -R/usr/local/lib
> -R/opt/gnome-2.4/lib
> creating test_deduce_result_type
> source='test_functor_trait.cc' object='test_functor_trait.o'
> libtool=no \
> depfile='.deps/test_functor_trait.Po'
> tmpdepfile='.deps/test_functor_trait.TPo' \
> depmode=none /bin/bash ../depcomp \
> CC  -I. -I. -I.. -I..  -I/opt/gnome-2.4/include  -g -c -o
> test_functor_trait.o `test -f 'test_functor_trait.cc' || echo
> './'`test_functor_trait.cc
> "../sigc++/visit_each.h", line 113: Error: Overloading ambiguity
> between "print::operator()<A>(A*) const" and
> "print::operator()<A*>(A*const&) const".
> 1 Error(s) detected.
> make[1]: *** [test_functor_trait.o] Error 1
> make[1]: Leaving directory `/export/home/gnome/2.4/nightly/libsigc/ 
> libsigc++2/tests'
> make: *** [all-recursive] Error 1
// -*- c++ -*-
/* Copyright 2002, The libsigc++ Development Team
 *  Assigned to public domain.  Use as you wish without restriction.
 */

#include <iostream>
#include <sigc++/adaptors/bind.h>
#include <sigc++/adaptors/compose.h>
#include <sigc++/functors/mem_fun.h>
#include <sigc++/functors/ptr_fun.h>

class trackable {};
struct A: public trackable { A() {} };

template <class T_type, bool I_derived = sigc::is_base_and_derived<trackable,T_type>::value>
struct with_trackable;

template <class T_type>
struct with_trackable<T_type,false>
{
  static void perform(const T_type& t) 
  { std::cout << "other" <<std::endl; }
};

template <class T_type>
struct with_trackable<T_type,true>
{
  static void perform(const T_type& t) 
  { std::cout << "trackable" << std::endl; }
  static void perform(T_type* t) 
  { std::cout << "trackable*" << std::endl; }
  static void perform(const T_type* t) 
  { std::cout << "const trackable*" << std::endl; }
};

struct print
{
  void operator()(int i) const
    { std::cout << "int: "<< i << std::endl; }
  template <class T>
  void operator()(const T& t) const
    { with_trackable<T>::perform(t); }
};

void foo(int i,int j,int k)
{}

void bar(int i)
{}

int main()
{
  int i=1,j=2,k=3;
  A a;
  std::cout << "hit all targets" << std::endl;
  sigc::visit_each(print(), sigc::compose(sigc::bind(sigc::ptr_fun3(&foo), sigc::ref(a), j), sigc::ptr_fun1(&bar)));
  std::cout << "hit all ints" << std::endl;
  sigc::visit_each_type<int>(print(),sigc::compose(sigc::bind(sigc::ptr_fun3(&foo), sigc::ref(a), j),sigc::ptr_fun1(&bar)));
  std::cout << "hit all trackable" << std::endl;
  sigc::visit_each_type<trackable>(print(), sigc::compose(sigc::bind(sigc::ptr_fun3(&foo), sigc::ref(a), j),sigc::ptr_fun1(&bar)));
}