gistfile1.txt

# simple testcase showing compiler error with boost filesystem and clang trunk:

#include "boost/filesystem/operations.hpp"

int main() {
  return 0;
}

# g++ works:

g++ -o test.o -c -I/opt/boost-trunk/include test.cpp

# clang does not

clang -v
clang version 3.0 (trunk 131789)
Target: x86_64-apple-darwin10.7.0
Thread model: posix

$ clang++ -o test.o -c -I/opt/boost-trunk/include test.cpp
In file included from test.cpp:1:
In file included from /opt/boost-trunk/include/boost/filesystem/operations.hpp:31:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/operations.hpp:25:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/path.hpp:28:
In file included from /opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:26:
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:40:5: error: 'T' does not refer to a
      value
    BOOST_STATIC_CONSTANT(
    ^
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:45:13: note: instantiated from:
            BOOST_INTERNAL_IS_POD(T)
            ^
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:26:34: note: instantiated from:
#define BOOST_INTERNAL_IS_POD(T) BOOST_IS_POD(T)
                                 ^
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:45:13: note: instantiated from:
            BOOST_INTERNAL_IS_POD(T)
            ^
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:45:35: note: instantiated from:
            BOOST_INTERNAL_IS_POD(T)
                                  ^
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:38:20: note: declared here
template <typename T> struct is_pod_impl
                   ^
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:46:20: error: type name requires a
      specifier or qualifier
         >::value));
                   ^
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:46:20: error: C++ requires a type
      specifier for all declarations
         >::value));
                   ^
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:46:20: error: expected ')'
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:40:5: note: to match this '('
    BOOST_STATIC_CONSTANT(
    ^
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:42:9: note: instantiated from:
        (::boost::type_traits::ice_or<
        ^
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:134:1: error: non-type template argument
      of type 'const bool' is not an integral constant expression
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_POD,T,::boost::detail::is_pod_impl<T>::value)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from test.cpp:1:
In file included from /opt/boost-trunk/include/boost/filesystem/operations.hpp:31:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/operations.hpp:25:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/path.hpp:28:
In file included from /opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:26:
In file included from /opt/boost-trunk/include/boost/type_traits/is_pod.hpp:21:
/opt/boost-trunk/include/boost/type_traits/detail/bool_trait_def.hpp:69:5: note: instantiated from:
    BOOST_TT_AUX_BOOL_C_BASE(C) \
    ^
In file included from test.cpp:1:
In file included from /opt/boost-trunk/include/boost/filesystem/operations.hpp:31:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/operations.hpp:25:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/path.hpp:28:
In file included from /opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:26:
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:134:1: note: instantiated from:
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_POD,T,::boost::detail::is_pod_impl<T>::value)
^                                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:134:39: note: instantiated from:
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_POD,T,::boost::detail::is_pod_impl<T>::value)
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/boost-trunk/include/boost/mpl/aux_/nested_type_wknd.hpp:27:7: note: in instantiation of
      template class 'boost::is_POD<const boost::filesystem3::path>' requested here
    : T::type
      ^
/opt/boost-trunk/include/boost/mpl/aux_/preprocessed/gcc/and.hpp:51:11: note: in instantiation
      of template class 'boost::mpl::aux::nested_type_wknd<boost::is_POD<const
      boost::filesystem3::path> >' requested here
          BOOST_MPL_AUX_NESTED_TYPE_WKND(T1)::value
          ^
/opt/boost-trunk/include/boost/mpl/aux_/nested_type_wknd.hpp:38:5: note: instantiated from:
    ::boost::mpl::aux::nested_type_wknd<T> \
    ^
/opt/boost-trunk/include/boost/mpl/aux_/nested_type_wknd.hpp:27:7: note: in instantiation of
      template class 'boost::mpl::and_<boost::is_POD<const boost::filesystem3::path>,
      boost::detail::iterator_writability_disabled<const boost::filesystem3::path, const
      boost::filesystem3::path &>, mpl_::bool_<true>, mpl_::bool_<true>, mpl_::bool_<true> >'
      requested here
    : T::type
      ^
/opt/boost-trunk/include/boost/mpl/not.hpp:41:11: note: in instantiation of template class
      'boost::mpl::aux::nested_type_wknd<boost::mpl::and_<boost::is_POD<const
      boost::filesystem3::path>, boost::detail::iterator_writability_disabled<const
      boost::filesystem3::path, const boost::filesystem3::path &>, mpl_::bool_<true>,
      mpl_::bool_<true>, mpl_::bool_<true> > >' requested here
          BOOST_MPL_AUX_NESTED_TYPE_WKND(T)::value
          ^
/opt/boost-trunk/include/boost/mpl/aux_/nested_type_wknd.hpp:38:5: note: instantiated from:
    ::boost::mpl::aux::nested_type_wknd<T> \
    ^
/opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:375:9: note: in instantiation of
      template class 'boost::mpl::not_<boost::mpl::and_<boost::is_POD<const
      boost::filesystem3::path>, boost::detail::iterator_writability_disabled<const
      boost::filesystem3::path, const boost::filesystem3::path &>, mpl_::bool_<true>,
      mpl_::bool_<true>, mpl_::bool_<true> > >' requested here
      : mpl::not_<
        ^
/opt/boost-trunk/include/boost/mpl/if.hpp:63:11: note: in instantiation of template class
      'boost::detail::use_operator_brackets_proxy<const boost::filesystem3::path, const
      boost::filesystem3::path &>' requested here
          BOOST_MPL_AUX_STATIC_CAST(bool, BOOST_MPL_AUX_VALUE_WKND(T1)::value)
          ^
/opt/boost-trunk/include/boost/mpl/if.hpp:63:43: note: instantiated from:
          BOOST_MPL_AUX_STATIC_CAST(bool, BOOST_MPL_AUX_VALUE_WKND(T1)::value)
                                          ^
/opt/boost-trunk/include/boost/mpl/if.hpp:63:68: note: instantiated from:
          BOOST_MPL_AUX_STATIC_CAST(bool, BOOST_MPL_AUX_VALUE_WKND(T1)::value)
                                                                   ^
/opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:388:26: note: in instantiation of
      template class 'boost::mpl::if_<boost::detail::use_operator_brackets_proxy<const
      boost::filesystem3::path, const boost::filesystem3::path &>,
      boost::detail::operator_brackets_proxy<boost::filesystem3::path::iterator>, const
      boost::filesystem3::path>' requested here
        typedef typename mpl::if_<
                         ^
/opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:651:16: note: in instantiation of
      template class
      'boost::detail::operator_brackets_result<boost::filesystem3::path::iterator, const
      boost::filesystem3::path, const boost::filesystem3::path &>' requested here
      typename boost::detail::operator_brackets_result<Derived,Value,reference>::type
               ^
/opt/boost-trunk/include/boost/filesystem/v3/path.hpp:480:14: note: in instantiation of
      template class 'boost::iterator_facade<boost::filesystem3::path::iterator, const
      boost::filesystem3::path, boost::bidirectional_traversal_tag, const
      boost::filesystem3::path &, long>' requested here
    : public boost::iterator_facade<
             ^
In file included from test.cpp:1:
In file included from /opt/boost-trunk/include/boost/filesystem/operations.hpp:31:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/operations.hpp:25:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/path.hpp:28:
In file included from /opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:26:
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:134:1: error: non-type template argument
      of type 'const bool' is not an integral constant expression
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_POD,T,::boost::detail::is_pod_impl<T>::value)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from test.cpp:1:
In file included from /opt/boost-trunk/include/boost/filesystem/operations.hpp:31:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/operations.hpp:25:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/path.hpp:28:
In file included from /opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:26:
In file included from /opt/boost-trunk/include/boost/type_traits/is_pod.hpp:21:
/opt/boost-trunk/include/boost/type_traits/detail/bool_trait_def.hpp:69:5: note: instantiated from:
    BOOST_TT_AUX_BOOL_C_BASE(C) \
    ^
In file included from test.cpp:1:
In file included from /opt/boost-trunk/include/boost/filesystem/operations.hpp:31:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/operations.hpp:25:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/path.hpp:28:
In file included from /opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:26:
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:134:1: note: instantiated from:
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_POD,T,::boost::detail::is_pod_impl<T>::value)
^                                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/boost-trunk/include/boost/type_traits/is_pod.hpp:134:39: note: instantiated from:
BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_POD,T,::boost::detail::is_pod_impl<T>::value)
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/boost-trunk/include/boost/mpl/aux_/nested_type_wknd.hpp:27:7: note: in instantiation of
      template class 'boost::is_POD<boost::filesystem3::directory_entry>' requested here
    : T::type
      ^
/opt/boost-trunk/include/boost/mpl/aux_/preprocessed/gcc/and.hpp:51:11: note: in instantiation
      of template class
      'boost::mpl::aux::nested_type_wknd<boost::is_POD<boost::filesystem3::directory_entry> >'
      requested here
          BOOST_MPL_AUX_NESTED_TYPE_WKND(T1)::value
          ^
/opt/boost-trunk/include/boost/mpl/aux_/nested_type_wknd.hpp:38:5: note: instantiated from:
    ::boost::mpl::aux::nested_type_wknd<T> \
    ^
/opt/boost-trunk/include/boost/mpl/aux_/nested_type_wknd.hpp:27:7: note: in instantiation of
      template class 'boost::mpl::and_<boost::is_POD<boost::filesystem3::directory_entry>,
      boost::detail::iterator_writability_disabled<boost::filesystem3::directory_entry,
      boost::filesystem3::directory_entry &>, mpl_::bool_<true>, mpl_::bool_<true>,
      mpl_::bool_<true> >' requested here
    : T::type
      ^
/opt/boost-trunk/include/boost/mpl/not.hpp:41:11: note: in instantiation of template class
      'boost::mpl::aux::nested_type_wknd<boost::mpl::and_<boost::is_POD<boost::filesystem3::directory_entry>,
      boost::detail::iterator_writability_disabled<boost::filesystem3::directory_entry,
      boost::filesystem3::directory_entry &>, mpl_::bool_<true>, mpl_::bool_<true>,
      mpl_::bool_<true> > >' requested here
          BOOST_MPL_AUX_NESTED_TYPE_WKND(T)::value
          ^
/opt/boost-trunk/include/boost/mpl/aux_/nested_type_wknd.hpp:38:5: note: instantiated from:
    ::boost::mpl::aux::nested_type_wknd<T> \
    ^
/opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:375:9: note: in instantiation of
      template class
      'boost::mpl::not_<boost::mpl::and_<boost::is_POD<boost::filesystem3::directory_entry>,
      boost::detail::iterator_writability_disabled<boost::filesystem3::directory_entry,
      boost::filesystem3::directory_entry &>, mpl_::bool_<true>, mpl_::bool_<true>,
      mpl_::bool_<true> > >' requested here
      : mpl::not_<
        ^
/opt/boost-trunk/include/boost/mpl/if.hpp:63:11: note: in instantiation of template class
      'boost::detail::use_operator_brackets_proxy<boost::filesystem3::directory_entry,
      boost::filesystem3::directory_entry &>' requested here
          BOOST_MPL_AUX_STATIC_CAST(bool, BOOST_MPL_AUX_VALUE_WKND(T1)::value)
          ^
/opt/boost-trunk/include/boost/mpl/if.hpp:63:43: note: instantiated from:
          BOOST_MPL_AUX_STATIC_CAST(bool, BOOST_MPL_AUX_VALUE_WKND(T1)::value)
                                          ^
/opt/boost-trunk/include/boost/mpl/if.hpp:63:68: note: instantiated from:
          BOOST_MPL_AUX_STATIC_CAST(bool, BOOST_MPL_AUX_VALUE_WKND(T1)::value)
                                                                   ^
/opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:388:26: note: in instantiation of
      template class
      'boost::mpl::if_<boost::detail::use_operator_brackets_proxy<boost::filesystem3::directory_entry,
      boost::filesystem3::directory_entry &>,
      boost::detail::operator_brackets_proxy<boost::filesystem3::directory_iterator>,
      boost::filesystem3::directory_entry>' requested here
        typedef typename mpl::if_<
                         ^
/opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:651:16: note: in instantiation of
      template class
      'boost::detail::operator_brackets_result<boost::filesystem3::directory_iterator,
      boost::filesystem3::directory_entry, boost::filesystem3::directory_entry &>' requested
      here
      typename boost::detail::operator_brackets_result<Derived,Value,reference>::type
               ^
/opt/boost-trunk/include/boost/filesystem/v3/operations.hpp:582:14: note: in instantiation of
      template class 'boost::iterator_facade<boost::filesystem3::directory_iterator,
      boost::filesystem3::directory_entry, boost::single_pass_traversal_tag,
      boost::filesystem3::directory_entry &, long>' requested here
    : public boost::iterator_facade< directory_iterator,
             ^
In file included from test.cpp:1:
In file included from /opt/boost-trunk/include/boost/filesystem/operations.hpp:31:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/operations.hpp:25:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/path.hpp:25:
In file included from /opt/boost-trunk/include/boost/filesystem/v3/path_traits.hpp:22:
In file included from /opt/boost-trunk/include/boost/type_traits/decay.hpp:18:
In file included from /opt/boost-trunk/include/boost/mpl/eval_if.hpp:17:
/opt/boost-trunk/include/boost/mpl/if.hpp:63:11: error: no member named 'value' in
      'boost::detail::use_operator_brackets_proxy<boost::filesystem3::directory_entry,
      boost::filesystem3::directory_entry &>'
          BOOST_MPL_AUX_STATIC_CAST(bool, BOOST_MPL_AUX_VALUE_WKND(T1)::value)
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/boost-trunk/include/boost/mpl/if.hpp:63:73: note: instantiated from:
          BOOST_MPL_AUX_STATIC_CAST(bool, BOOST_MPL_AUX_VALUE_WKND(T1)::value)
                                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
/opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:388:26: note: in instantiation of
      template class
      'boost::mpl::if_<boost::detail::use_operator_brackets_proxy<boost::filesystem3::directory_entry,
      boost::filesystem3::directory_entry &>,
      boost::detail::operator_brackets_proxy<boost::filesystem3::recursive_directory_iterator>,
      boost::filesystem3::directory_entry>' requested here
        typedef typename mpl::if_<
                         ^
/opt/boost-trunk/include/boost/iterator/iterator_facade.hpp:651:16: note: in instantiation of
      template class
      'boost::detail::operator_brackets_result<boost::filesystem3::recursive_directory_iterator,
      boost::filesystem3::directory_entry, boost::filesystem3::directory_entry &>' requested
      here
      typename boost::detail::operator_brackets_result<Derived,Value,reference>::type
               ^
/opt/boost-trunk/include/boost/filesystem/v3/operations.hpp:728:14: note: in instantiation of
      template class 'boost::iterator_facade<boost::filesystem3::recursive_directory_iterator,
      boost::filesystem3::directory_entry, boost::single_pass_traversal_tag,
      boost::filesystem3::directory_entry &, long>' requested here
    : public boost::iterator_facade<
             ^
7 errors generated.