Re: [Boost-users] Using lambda for sort

On 8/9/07, chun ping wang wrote:

sorry, my bad.

you should use std::pair country_kv;

replace countries_t in the lambda code with country_kv;

this should work.

This doesn't compile either: int main() { typedef std::map countries_t; countries_t countries; countries[0] = 5; countries[1] = 3; countries[2] = 1; typedef vector countries1_t; countries1_t countries1; for (countries_t::const_iterator i = countries.begin(); i != countries.end(); i++) countries1.push_back(i); typedef std::pair country_kv; sort(countries1.begin(), countries1.end(), bll::bind(&country_kv::second, _1) < bll::bind(&country_kv::second, _2)); return 0; } ------ Build started: Project: Lambda Test, Configuration: Debug Win32 ------ Compiling... Lambda Test.cpp c:\vc\misc\include\boost\lambda\detail\actions.hpp(87) : error C2665: 'boost::lambda::function_adaptor<Func>::apply' : none of the 8 overloads could convert all the argument types with [ Func=int std::pair::* ] c:\vc\misc\include\boost\lambda\detail\function_adaptors.hpp(117): could be 'RET boost::lambda::function_adaptor<Func>::apply<RET>(T std::pair<_Ty1,_Ty2>::* ,Object &)' with [ RET=int &, Func=int std::pair::* , T=int, _Ty1=int, _Ty2=int, Object=std::pair ] c:\vc\misc\include\boost\lambda\detail\function_adaptors.hpp(121): or 'RET boost::lambda::function_adaptor<Func>::apply<RET>(T std::pair<_Ty1,_Ty2>::* ,const Object &)' with [ RET=int &, Func=int std::pair::* , T=int, _Ty1=int, _Ty2=int, Object=std::pair ] c:\vc\misc\include\boost\lambda\detail\function_adaptors.hpp(125): or 'RET boost::lambda::function_adaptor<Func>::apply<RET>(T std::pair<_Ty1,_Ty2>::* ,volatile Object &)' with [ RET=int &, Func=int std::pair::* , T=int, _Ty1=int, _Ty2=int, Object=std::pair ] c:\vc\misc\include\boost\lambda\detail\function_adaptors.hpp(129): or 'RET boost::lambda::function_adaptor<Func>::apply<RET>(T std::pair<_Ty1,_Ty2>::* ,volatile const Object &)' with [ RET=int &, Func=int std::pair::* , T=int, _Ty1=int, _Ty2=int, Object=std::pair ] c:\vc\misc\include\boost\lambda\detail\function_adaptors.hpp(133): or 'RET boost::lambda::function_adaptor<Func>::apply<RET>(T std::pair<_Ty1,_Ty2>::* ,Object *)' with [ RET=int &, Func=int std::pair::* , T=int, _Ty1=int, _Ty2=int, Object=std::pair ] c:\vc\misc\include\boost\lambda\detail\function_adaptors.hpp(137): or 'RET boost::lambda::function_adaptor<Func>::apply<RET>(T std::pair<_Ty1,_Ty2>::* ,const Object *)' with [ RET=int &, Func=int std::pair::* , T=int, _Ty1=int, _Ty2=int, Object=std::pair ] c:\vc\misc\include\boost\lambda\detail\function_adaptors.hpp(141): or 'RET boost::lambda::function_adaptor<Func>::apply<RET>(T std::pair<_Ty1,_Ty2>::* ,volatile Object *)' with [ RET=int &, Func=int std::pair::* , T=int, _Ty1=int, _Ty2=int, Object=std::pair ] c:\vc\misc\include\boost\lambda\detail\function_adaptors.hpp(145): or 'RET boost::lambda::function_adaptor<Func>::apply<RET>(T std::pair<_Ty1,_Ty2>::* ,volatile const Object *)' with [ RET=int &, Func=int std::pair::* , T=int, _Ty1=int, _Ty2=int, Object=std::pair ] while trying to match the argument list '(rt0 , std::_Tree<_Traits>::const_iterator)' with [ _Traits=std::_Tmap_traits>,false> ] c:\vc\misc\include\boost\lambda\detail\lambda_functor_base.hpp(408) : see reference to function template instantiation 'RET boost::lambda::function_action<I>::apply::const_iterator>(A1 &,A2 &)' being compiled with [ RET=int &, I=2, U=rt0, _Traits=std::_Tmap_traits>,false>, A1=rt0, A2=std::_Tree>,false>>::const_iterator ] c:\vc\misc\include\boost\lambda\detail\select_functions.hpp(30) : see reference to function template instantiation 'RET boost::lambda::lambda_functor_base::call(A &,B &,C &,Env &) const' being compiled with [ RET=int &, Act=boost::lambda::action<2,boost::lambda::function_action<2>>, Args=boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>, A=std::_Tree>,false>>::const_iterator, B=std::_Tree>,false>>::const_iterator, C=const boost::tuples::null_type, Env=const boost::tuples::null_type ] c:\vc\misc\include\boost\lambda\detail\operator_lambda_func_base.hpp(218) : see reference to function template instantiation 'int &boost::lambda::detail::select,A,B,C,Env>(const boost::lambda::lambda_functor<T> &,A &,B &,C &,Env &)' being compiled with [ Act=boost::lambda::action<2,boost::lambda::function_action<2>>, Args=boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>, A=std::_Tree>,false>>::const_iterator, B=std::_Tree>,false>>::const_iterator, C=const boost::tuples::null_type, Env=const boost::tuples::null_type, T=boost::lambda::lambda_functor_base>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>> ] c:\vc\misc\include\boost\lambda\detail\lambda_functors.hpp(156) : see reference to function template instantiation 'RET boost::lambda::lambda_functor_base::call(A &,B &,C &,Env &) const' being compiled with [ RET=bool, Act=boost::lambda::relational_actionboost::lambda::less_action, Args=boost::tuples::tuple>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::lambda::lambda_functor>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>, A=std::_Tree>,false>>::const_iterator, B=std::_Tree>,false>>::const_iterator, C=const boost::tuples::null_type, Env=const boost::tuples::null_type ] c:\program files\microsoft visual studio 8\vc\include\algorithm(3181) : see reference to function template instantiation 'bool boost::lambda::lambda_functor<T>::operator ()::const_iterator,std::_Tree<_Traits>::const_iterator>(A &,B &) const' being compiled with [ T=boost::lambda::lambda_functor_baseboost::lambda::less_action,boost::tuples::tuple>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::lambda::lambda_functor>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>, _Traits=std::_Tmap_traits>,false>, A=std::_Tree>,false>>::const_iterator, B=std::_Tree>,false>>::const_iterator ] c:\program files\microsoft visual studio 8\vc\include\algorithm(3237) : see reference to function template instantiation 'std::pair<_Ty1,_Ty2> std::_Unguarded_partition<_RanIt,_Pr>(_RanIt,_RanIt,_Pr)' being compiled with [ _Ty1=std::_Vector_iterator>,false>>::const_iterator,std::allocator>,false>>::const_iterator>>, _Ty2=std::_Vector_iterator>,false>>::const_iterator,std::allocator>,false>>::const_iterator>>, _RanIt=std::_Vector_iterator>,false>>::const_iterator,std::allocator>,false>>::const_iterator>>, _Pr=boost::lambda::lambda_functorboost::lambda::less_action,boost::tuples::tuple>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::lambda::lambda_functor>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>> ] c:\program files\microsoft visual studio 8\vc\include\algorithm(3261) : see reference to function template instantiation 'void std::_Sort,__w64 int,_Pr>(_RanIt,_RanIt,_Diff,_Pr)' being compiled with [ _Ty=std::_Tree>,false>>::const_iterator, _Alloc=std::allocator>,false>>::const_iterator>, _Pr=boost::lambda::lambda_functorboost::lambda::less_action,boost::tuples::tuple>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::lambda::lambda_functor>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>>, _RanIt=std::_Vector_iterator>,false>>::const_iterator,std::allocator>,false>>::const_iterator>>, _Diff=__w64 int ] c:\vc\temp\lambda test\lambda test.cpp(27) : see reference to function template instantiation 'void std::sort,boost::lambda::lambda_functor<T>>(_RanIt,_RanIt,_Pr)' being compiled with [ _Ty=std::_Tree>,false>>::const_iterator, _Alloc=std::allocator>,false>>::const_iterator>, T=boost::lambda::lambda_functor_baseboost::lambda::less_action,boost::tuples::tuple>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::lambda::lambda_functor>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>, _RanIt=std::_Vector_iterator>,false>>::const_iterator,std::allocator>,false>>::const_iterator>>, _Pr=boost::lambda::lambda_functorboost::lambda::less_action,boost::tuples::tuple>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::lambda::lambda_functor>,boost::tuples::tuple::* const ,const boost::lambda::lambda_functor>,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type,boost::lambda::detail::bind_traitsboost::tuples::null_type::type>>>,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type,boost::tuples::null_type>>> ] Lambda Test - 1 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========