On 06/27/12 10:04, Larry Evans wrote:
On 06/19/12 08:42, Larry Evans wrote:
On 05/22/12 15:34, Steven Watanabe wrote: [snip]
The library is available in the Boost Sandbox at http://svn.boost.org/svn/boost/sandbox/type_erasure/
The type_erasure version I have is:
~/prog_dev/boost-svn/ro/boost_1_49_0/sandbox/ro/type_erasure/type_erasure $ svn update At revision 79008.
However, compiling multi.cpp with gcc4.8 (2012-04-22) gives a uninitialized constexpr error.
compilation; default-directory: "~/prog_dev/boost-svn/ro/boost_1_49_0/sandbox/ro/type_erasure/type_erasure/libs/type_erasure/example/" -*- Compilation started at Tue Jun 19 08:36:12
bjam multi sh: icpc: not found ...patience... ...found 550 targets... ...updating 4 targets... common.mkdir bin/multi.test/gcc-4.8v common.mkdir bin/multi.test/gcc-4.8v/debug gcc.compile.c++ bin/multi.test/gcc-4.8v/debug/multi.o In file included from ../../../boost/type_erasure/binding.hpp:28:0, from ../../../boost/type_erasure/any.hpp:39, from multi.cpp:11: ../../../boost/type_erasure/detail/vtable.hpp:155:28: error: constexpr static data member 'value' must have an initializer static constexpr Table value; ^ [snip] Changing the vtable.hpp code to:
template<class Table, class... T> struct vtable_init { static constexpr Table value=Table(T::value...); };
from:
template<class Table, class... T> struct vtable_init { static constexpr Table value; };
template<class Table, class... T> constexpr Table vtable_init<Table, T...>::value(T::value...);
may be a solution.
Or not. When the attached is compiled with gcc4.8 with -std=gnu++11, there's a link error :( ./concept_call_noph.o: In function `boost::type_erasure::binding<boost::type_erasure::incrementable<int>
::impl_type::impl_type<boost::mpl::map0<mpl_::na> (boost::type_erasure::static_binding<boost::mpl::map0<mpl_::na> > const&)': concept_call_noph.cpp:(.text._ZN5boost12type_erasure7bindingINS0_13incrementableIiEEE9impl_typeC2INS_3mpl4map0IN4mpl_2naEEEEERKNS0_14static_bindingIT_EE[_ZN5boost12type_erasure7bindingINS0_13incrementableIiEEE9impl_typeC5INS_3mpl4map0IN4mpl_2naEEEEERKNS0_14static_bindingIT_EE]+0x27): undefined reference to `boost::type_erasure::detail::vtable_init<boost::type_erasure::detail::vtable_storage<boost::type_erasure::detail::vtable_adapter<boost::type_erasure::incrementable<int>, void ()(int&)> >, boost::type_erasure::detail::vtable_adapter<boost::type_erasure::incrementable<int>, void ()(int&)> >::value'
collect2: error: ld returned 1 exit status
I don't know why :( -regards, Larry