[Boost-users] Visual Studio 2005 unable to generate assignment operator

From: storri_at_[hidden]
Date: 2007-05-11 11:56:39

Is this error report indicating that I have a problem in my use of boost
or my code? Here is the statement that its trying to compile:

                output << boost::format("%1X") %
                    boost::io::group ( std::hex,
                                       std::setw(2),
                                       std::setfill('0'),
                                       static_cast<boost::uint16_t>(m_data[(*pos).second]));

m_data is defined as:

    // !\brief This type represents a byte
    typedef boost::uint8_t data_t;

    // !\brief The internal data structure of a Memory Map
    typedef std::vector <data_t> Values_t;

    data_types::Memory_Map::Values_t m_data;

pos is a data_types::Memory_Map::Address_Map_t::const_iterator that is
defined as:

     // !\brief Map key is a 32-bit address in memory
     typedef boost::uint32_t map_key_t;

     // !\brief index where the data is in the Values_t list
     typedef boost::uint32_t index_t;

     // !\brief Table use for normal lookups ( address => index )
     typedef std::map<map_key_t, index_t> Address_Map_t;

Please forgive my ignorance here of Visual Studio. I have read up the
microsoft explaination of this error but I have trouble understanding
where to start looking. I do not have any constant data members in my code
for the Memory_Map class. Therefore I am not sure why I am getting this
error.

Stephen

------ Build started: Project: data_containers, Configuration: Debug Win32
------
1>Compiling...
1>Memory_Map.cpp
1>C:\Program Files\boost\boost_1_33_1\boost/format/group.hpp(124) :
warning C4512: 'boost::io::detail::group4<T1,T2,T3,T4>' : assignment
operator could not be generated
1>        with
1>        [
1>            T1=std::ios_base &(__cdecl *)(std::ios_base &),
1>            T2=std::_Smanip<std::ios_base::fmtflags>,
1>            T3=std::_Fillobj<char>,
1>            T4=const boost::uint16_t &
1>        ]
1>        C:\Program Files\boost\boost_1_33_1\boost/format/group.hpp(54) :
see reference to class template instantiation
'boost::io::detail::group4<T1,T2,T3,T4>' being compiled
1>        with
1>        [
1>            T1=std::ios_base &(__cdecl *)(std::ios_base &),
1>            T2=std::_Smanip<std::ios_base::fmtflags>,
1>            T3=std::_Fillobj<char>,
1>            T4=const boost::uint16_t &
1>        ]
1>        .\Memory_Map.cpp(341) : see reference to class template
instantiation 'boost::io::detail::group1<T1>' being compiled
1>        with
1>        [
1>            T1=boost::io::detail::group4<std::ios_base &(__cdecl
*)(std::ios_base
&),std::_Smanip<std::ios_base::fmtflags>,std::_Fillobj<char>,const
boost::uint16_t &>
1>        ]
1>C:\Program Files\boost\boost_1_33_1\boost/format/group.hpp(58) : warning
C4512: 'boost::io::detail::group1<T1>' : assignment operator could not be
generated
1>        with
1>        [
1>            T1=boost::io::detail::group4<std::ios_base &(__cdecl
*)(std::ios_base
&),std::_Smanip<std::ios_base::fmtflags>,std::_Fillobj<char>,const
boost::uint16_t &>
1>        ]
1>C:\Program Files\boost\boost_1_33_1\boost/format/group.hpp(58) : warning
C4512: 'boost::io::detail::group1<T1>' : assignment operator could not be
generated
1>        with
1>        [
1>            T1=const boost::uint16_t &
1>        ]
1>        C:\Program
Files\boost\boost_1_33_1\boost/format/feed_args.hpp(103) : see reference
to class template instantiation 'boost::io::detail::group1<T1>' being
compiled
1>        with
1>        [
1>            T1=const boost::uint16_t &
1>        ]
1>        C:\Program
Files\boost\boost_1_33_1\boost/format/feed_args.hpp(150) : see reference
to function template instantiation 'void
boost::io::detail::put_last<char,std::char_traits<char>,boost::io::detail::group4<T1,T2,T3,T4>>(std::basic_ostream<_Elem,_Traits>
&,const boost::io::detail::group1<boost::io::detail::group4<T1,T2,T3,T4>>
&)' being compiled
1>        with
1>        [
1>            T1=std::ios_base &(__cdecl *)(std::ios_base &),
1>            T2=std::_Smanip<std::ios_base::fmtflags>,
1>            T3=std::_Fillobj<char>,
1>            T4=const boost::uint16_t &,
1>            _Elem=char,
1>            _Traits=std::char_traits<char>
1>        ]
1>        C:\Program
Files\boost\boost_1_33_1\boost/format/feed_args.hpp(242) : see reference
to function template instantiation 'void
boost::io::detail::put<Ch,Tr,Alloc,T>(T,const
boost::io::detail::format_item<Ch,Tr,Alloc>
&,std::basic_string<_Elem,_Traits,_Ax>
&,boost::io::basic_altstringbuf<Ch,Tr,Alloc> &,boost::io::detail::locale_t
*)' being compiled
1>        with
1>        [
1>            Ch=char,
1>            Tr=std::char_traits<char>,
1>            Alloc=std::allocator<char>,
1>            T=const
boost::io::detail::group1<boost::io::detail::group4<std::ios_base
&(__cdecl *)(std::ios_base
&),std::_Smanip<std::ios_base::fmtflags>,std::_Fillobj<char>,const
boost::uint16_t &>> &,
1>            _Elem=char,
1>            _Traits=std::char_traits<char>,
1>            _Ax=std::allocator<char>
1>        ]
1>        C:\Program
Files\boost\boost_1_33_1\boost/format/feed_args.hpp(251) : see reference
to function template instantiation 'void
boost::io::detail::distribute<Ch,Tr,Alloc,T>(boost::basic_format<Ch> &,T)'
being compiled
1>        with
1>        [
1>            Ch=char,
1>            Tr=std::char_traits<char>,
1>            Alloc=std::allocator<char>,
1>            T=const
boost::io::detail::group1<boost::io::detail::group4<std::ios_base
&(__cdecl *)(std::ios_base
&),std::_Smanip<std::ios_base::fmtflags>,std::_Fillobj<char>,const
boost::uint16_t &>> &
1>        ]
1>        C:\Program
Files\boost\boost_1_33_1\boost/format/format_class.hpp(64) : see reference
to function template instantiation 'boost::basic_format<Ch>
&boost::io::detail::feed<char,Tr,Alloc,const T&>(boost::basic_format<Ch>
&,const boost::io::detail::group1<T1>)' being compiled
1>        with
1>        [
1>            Ch=char,
1>            Tr=std::char_traits<char>,
1>            Alloc=std::allocator<char>,
1>           
T=boost::io::detail::group1<boost::io::detail::group4<std::ios_base
&(__cdecl *)(std::ios_base
&),std::_Smanip<std::ios_base::fmtflags>,std::_Fillobj<char>,const
boost::uint16_t &>>,
1>            T1=boost::io::detail::group4<std::ios_base &(__cdecl
*)(std::ios_base
&),std::_Smanip<std::ios_base::fmtflags>,std::_Fillobj<char>,const
boost::uint16_t &>
1>        ]
1>        .\Memory_Map.cpp(341) : see reference to function template
instantiation 'boost::basic_format<Ch> &boost::basic_format<Ch>::operator
%<boost::io::detail::group1<T1>>(const T &)' being compiled
1>        with
1>        [
1>            Ch=char,
1>            T1=boost::io::detail::group4<std::ios_base &(__cdecl
*)(std::ios_base
&),std::_Smanip<std::ios_base::fmtflags>,std::_Fillobj<char>,const
boost::uint16_t &>,
1>           
T=boost::io::detail::group1<boost::io::detail::group4<std::ios_base
&(__cdecl *)(std::ios_base
&),std::_Smanip<std::ios_base::fmtflags>,std::_Fillobj<char>,const
boost::uint16_t &>>
1>        ]