Hi, I have the following definition of the classes class DataRecordMap { private: typedef boost::shared_ptr<const DataRecord > DataRecordPtr; typedef std::pair<std::string, DataRecordPtr> key_type; typedef double value_type; struct keyComp { bool operator() (const DataRecordMap::key_type &lhs, const DataRecordMap::key_type &rhs) const; }; private: typedef std::map<key_type, value_type, keyComp> map_type; const std::vector<size_t> m_index; map_type m_records; public: DataRecordMap(const std::vector<size_t> &idx); void add(DataRecordPtr secondKey, double value); double operator[] (const DataRecord &value) const; double& operator[] (const DataRecord &secondKey); friend std::ostream& operator << (std::ostream& out, const DataRecordMap &records); }; Then it fails to compile on this implementation: double DataRecordMap::operator[] (const DataRecord &secondKey) const { std::string firstKey(secondKey.compareKey(m_index)->signature()); map_type::const_iterator findIt(std::find_if(m_records.begin(), m_records.end(), boost::bind(&map_type::key_type::first, _1) == firstKey)); if(findIt==m_records.end()) THROW_EXCEPTION("Key " << firstKey << " not found in the data records"); return (*findIt).second; } Could someone please help me with it? The error is: 1>------ Build started: Project: compare, Configuration: Debug Win32 ------ 1>Compiling... 1>diffTool.cpp 1>d:\dev\soho_new\thirdparty\boost\bind\mem_fn.hpp(333) : error C2784: 'T *boost::get_pointer(const boost::shared_ptr<X> &)' : could not deduce template argument for 'const boost::shared_ptr<X> &' from 'const std::pair<_Ty1,_Ty2>' 1> with 1> [ 1> _Ty1=const `anonymous-namespace'::DataRecordMap::key_type, 1> _Ty2=`anonymous-namespace'::DataRecordMap::value_type 1> ] 1> d:\dev\soho_new\thirdparty\boost\smart_ptr\shared_ptr.hpp(550) : see declaration of 'boost::get_pointer' 1> d:\dev\soho_new\thirdparty\boost\bind\mem_fn.hpp(352) : see reference to function template instantiation 'const R &boost::_mfi::dm<R,T>::call<const U>(U &,const void *) const' being compiled 1> with 1> [ 1> R=std::string, 1> T=std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>, 1> U=std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type> 1> ] 1> d:\dev\soho_new\thirdparty\boost\bind\bind.hpp(243) : see reference to function template instantiation 'const R &boost::_mfi::dm<R,T>::operator ()<A1>(const U &) const' being compiled 1> with 1> [ 1> R=std::string, 1> T=std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>, 1> A1=std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type>, 1> U=std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type> 1> ] 1> d:\dev\soho_new\thirdparty\boost\bind\bind_template.hpp(318) : see reference to function template instantiation 'R boost::_bi::list1<A1>::operator ()<const std::basic_string<_Elem,_Traits,_Ax>&,F,A>(boost::_bi::type<T>,F &,A &,long)' being compiled 1> with 1> [ 1> R=const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &, 1> A1=boost::arg<1>, 1> _Elem=char, 1> _Traits=std::char_traits<char>, 1> _Ax=std::allocator<char>, 1> F=boost::_mfi::dm<std::string,std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>>, 1> A=const boost::_bi::list1<const std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type> &>, 1> T=const std::basic_string<char,std::char_traits<char>,std::allocator<char>> & 1> ] 1> d:\dev\soho_new\thirdparty\boost\bind\bind.hpp(237) : see reference to function template instantiation 'const std::basic_string<_Elem,_Traits,_Ax> &boost::_bi::bind_t<R,F,L>::eval<const boost::_bi::list1<A1>>(A &)' being compiled 1> with 1> [ 1> _Elem=char, 1> _Traits=std::char_traits<char>, 1> _Ax=std::allocator<char>, 1> R=const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &, 1> F=boost::_mfi::dm<std::string,std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>>, 1> L=boost::_bi::list1<boost::arg<1>>, 1> A1=const std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type> &, 1> A=const boost::_bi::list1<const std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type> &> 1> ] 1> d:\dev\soho_new\thirdparty\boost\bind\bind.hpp(303) : see reference to function template instantiation 'const std::basic_string<_Elem,_Traits,_Ax> &boost::_bi::list1<A1>::operator []<const std::basic_string<_Elem,_Traits,_Ax>&,boost::_mfi::dm<R,T>,boost::_bi::list1<boost::arg<I>>>(boost::_bi::bind_t<const std::basic_string<_Elem,_Traits,_Ax> &,F,L> &) const' being compiled 1> with 1> [ 1> _Elem=char, 1> _Traits=std::char_traits<char>, 1> _Ax=std::allocator<char>, 1> A1=const std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type> &, 1> R=std::string, 1> T=std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>, 1> I=1, 1> F=boost::_mfi::dm<std::string,std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>>, 1> L=boost::_bi::list1<boost::arg<1>> 1> ] 1> d:\dev\soho_new\thirdparty\boost\bind\bind_template.hpp(47) : see reference to function template instantiation 'R boost::_bi::list2<A1,A2>::operator ()<bool,F,boost::_bi::list1<const std::pair<_Ty1,_Ty2> &>>(boost::_bi::type<T>,F &,A &,long)' being compiled 1> with 1> [ 1> R=bool, 1> A1=boost::_bi::bind_t<const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &,boost::_mfi::dm<std::string,std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>>,boost::_bi::list1<boost::arg<1>>>, 1> A2=boost::_bi::value<std::string>, 1> F=boost::_bi::equal, 1> _Ty1=const `anonymous-namespace'::DataRecordMap::key_type, 1> _Ty2=`anonymous-namespace'::DataRecordMap::value_type, 1> T=bool, 1> A=boost::_bi::list1<const std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type> &> 1> ] 1> c:\program files\microsoft visual studio 8\vc\include\algorithm(87) : see reference to function template instantiation 'bool boost::_bi::bind_t<R,F,L>::operator ()<std::pair<_Ty1,_Ty2>>(const A1 &)' being compiled 1> with 1> [ 1> R=bool, 1> F=boost::_bi::equal, 1> L=boost::_bi::list2<boost::_bi::bind_t<const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &,boost::_mfi::dm<std::string,std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>>,boost::_bi::list1<boost::arg<1>>>,boost::_bi::value<std::string>>, 1> _Ty1=const `anonymous-namespace'::DataRecordMap::key_type, 1> _Ty2=`anonymous-namespace'::DataRecordMap::value_type, 1> A1=std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type> 1> ] 1> c:\program files\microsoft visual studio 8\vc\include\algorithm(96) : see reference to function template instantiation '_InIt std::_Find_if<std::_Tree<_Traits>::const_iterator,_Pr>(_InIt,_InIt,_Pr)' being compiled 1> with 1> [ 1> _InIt=std::_Tree<std::_Tmap_traits<`anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type,`anonymous-namespace'::DataRecordMap::keyComp,std::allocator<std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type>>,false>>::const_iterator, 1> _Traits=std::_Tmap_traits<`anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type,`anonymous-namespace'::DataRecordMap::keyComp,std::allocator<std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type>>,false>, 1> _Pr=boost::_bi::bind_t<bool,boost::_bi::equal,boost::_bi::list2<boost::_bi::bind_t<const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &,boost::_mfi::dm<std::string,std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>>,boost::_bi::list1<boost::arg<1>>>,boost::_bi::value<std::string>>> 1> ] 1> d:\dev\ownprogs\compare\compare\difftool.cpp(166) : see reference to function template instantiation '_InIt std::find_if<std::_Tree<_Traits>::const_iterator,boost::_bi::bind_t<R,F,L>>(_InIt,_InIt,_Pr)' being compiled 1> with 1> [ 1> _InIt=std::_Tree<std::_Tmap_traits<`anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type,`anonymous-namespace'::DataRecordMap::keyComp,std::allocator<std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type>>,false>>::const_iterator, 1> _Traits=std::_Tmap_traits<`anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type,`anonymous-namespace'::DataRecordMap::keyComp,std::allocator<std::pair<const `anonymous-namespace'::DataRecordMap::key_type,`anonymous-namespace'::DataRecordMap::value_type>>,false>, 1> R=bool, 1> F=boost::_bi::equal, 1> L=boost::_bi::list2<boost::_bi::bind_t<const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &,boost::_mfi::dm<std::string,std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>>,boost::_bi::list1<boost::arg<1>>>,boost::_bi::value<std::string>>, 1> _Pr=boost::_bi::bind_t<bool,boost::_bi::equal,boost::_bi::list2<boost::_bi::bind_t<const std::basic_string<char,std::char_traits<char>,std::allocator<char>> &,boost::_mfi::dm<std::string,std::pair<std::string,`anonymous-namespace'::DataRecordMap::DataRecordPtr>>,boost::_bi::list1<boost::arg<1>>>,boost::_bi::value<std::string>>> 1> ] 1>d:\dev\soho_new\thirdparty\boost\bind\mem_fn.hpp(333) : error C2784: 'T *boost::get_pointer(const std::auto_ptr<_Ty> &)' : could not deduce template argument for 'const std::auto_ptr<_Ty> &' from 'const std::pair<_Ty1,_Ty2>' 1> with 1> [ 1> _Ty1=const `anonymous-namespace'::DataRecordMap::key_type, 1> _Ty2=`anonymous-namespace'::DataRecordMap::value_type 1> ] 1> d:\dev\soho_new\thirdparty\boost\get_pointer.hpp(25) : see declaration of 'boost::get_pointer' 1>d:\dev\soho_new\thirdparty\boost\bind\mem_fn.hpp(333) : error C2784: 'T *boost::get_pointer(T *)' : could not deduce template argument for 'T *' from 'const std::pair<_Ty1,_Ty2>' 1> with 1> [ 1> _Ty1=const `anonymous-namespace'::DataRecordMap::key_type, 1> _Ty2=`anonymous-namespace'::DataRecordMap::value_type 1> ] 1> d:\dev\soho_new\thirdparty\boost\get_pointer.hpp(18) : see declaration of 'boost::get_pointer' 1>d:\dev\soho_new\thirdparty\boost\bind\mem_fn.hpp(333) : error C2784: 'T *boost::get_pointer(const boost::reference_wrapper<T> &)' : could not deduce template argument for 'const boost::reference_wrapper<T> &' from 'const std::pair<_Ty1,_Ty2>' 1> with 1> [ 1> _Ty1=const `anonymous-namespace'::DataRecordMap::key_type, 1> _Ty2=`anonymous-namespace'::DataRecordMap::value_type 1> ] 1> d:\dev\soho_new\thirdparty\boost\ref.hpp(182) : see declaration of 'boost::get_pointer' 1>Build log was saved at "file://d:\Dev\OwnProgs\compare\compare\Debug\BuildLog.htm" 1>compare - 4 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== ___________________________________________________________ This e-mail may contain confidential and/or privileged information. 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