Okay, just to nail it down : - boost::bind does not generate the error and you don't need to cast the function pointer whereas - boost::lambda::bind needs you to explicitely cast the function pointer Thank you! Jacques. -----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Bruno Martínez Sent: Tuesday, November 29, 2005 11:03 AM To: boost-users@lists.boost.org Subject: Re: [Boost-users] Overload problem with bind On Tue, 29 Nov 2005 16:45:17 -0200, Noel Yap <noel.yap@gmail.com> wrote:

IIRC, I've had to play around with static_cast<> to work around these issues. Alternatively, you could assign the member function address to a local variable.

My wild guess is that, at the time the compiler is parsing &Position::GetX, it doesn't have enough information to decide which one to use.

Yes. This works: boost::lambda::bind( static_cast<float& (Position::*)() > (&Position::GetX), boost::ref(myPos)); Also, boost::bind doesn't seem to have this problem. There was a recent thread about this feature, by Peter Dimov and John Maddock, IIRC. Bruno

On 11/29/05, Kerner, Jacques <jkerner@ea.com> wrote:

...

Hi,

The following test generates an error :

class Position { const float & GetX() const {...} float & GetX() {...} };

Position myPos; bind( &Position::GetX, ref(myPos) ) // <- does not compile

How can I avoid these ? : (with MSVC 7.1)

test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<10,boost::lambda::function_action<10,Result>>,detail:: bin d_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9,const Arg10>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &,const Arg10 &)' : expects 10 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(1743) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9,const Arg10>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &,const Arg10 &)' : expects 10 arguments - 2 provided with [ Arity=10, Act=boost::lambda::function_action<10> ] ..\..\boost\lambda\detail\bind_functions.hpp(1710) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<10,boost::lambda::function_action<10,Result>>,detail:: bin d_tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7,Par8,Par9),const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9,const Arg10>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7,Par8,Par9),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &,const Arg10 &)' : expects 10 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(1673) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<9,boost::lambda::function_action<9,Result>>,detail::bi nd_ tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &)' : expects 9 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(1526) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &)' : expects 9 arguments - 2 provided with [ Arity=9, Act=boost::lambda::function_action<9> ] ..\..\boost\lambda\detail\bind_functions.hpp(1494) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<9,boost::lambda::function_action<9,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7,Par8),const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8,const Arg9>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7,Par8),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &,const Arg9 &)' : expects 9 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(1458) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<8,boost::lambda::function_action<8,Result>>,detail::bi nd_ tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &)' : expects 8 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(1322) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg8>Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &)' : expects 8 arguments - 2 provided with [ Arity=8, Act=boost::lambda::function_action<8> ] ..\..\boost\lambda\detail\bind_functions.hpp(1291) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<8,boost::lambda::function_action<8,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7),const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7,const Arg8>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6,Par7),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &,const Arg8 &)' : expects 8 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(1257) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<7,boost::lambda::function_action<7,Result>>,detail::bi nd_ tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &)' : expects 7 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(1123) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &)' : expects 7 arguments - 2 provided with [ Arity=7, Act=boost::lambda::function_action<7> ] ..\..\boost\lambda\detail\bind_functions.hpp(1092) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<7,boost::lambda::function_action<7,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6),const Arg2,const Arg3,const Arg4,const Arg5,const Arg6,const Arg7>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4,Par5,Par6),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &)' : expects 7 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(1058) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<6,boost::lambda::function_action<6,Result>>,detail::bi nd_ tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &)' : expects 6 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(927) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5,const Arg6>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &)' : expects 6 arguments - 2 provided with [ Arity=6, Act=boost::lambda::function_action<6> ] ..\..\boost\lambda\detail\bind_functions.hpp(899) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<6,boost::lambda::function_action<6,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4,Par5),const Arg2,const Arg3,const Arg4,const Arg5,const Arg6>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4,Par5),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &)' : expects 6 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(867) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<5,boost::lambda::function_action<5,Result>>,detail::bi nd_ tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg5>Arg3 &,const Arg4 &,const Arg5 &)' : expects 5 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(738) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4,const Arg5>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &)' : expects 5 arguments - 2 provided with [ Arity=5, Act=boost::lambda::function_action<5> ] ..\..\boost\lambda\detail\bind_functions.hpp(710) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<5,boost::lambda::function_action<5,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3,Par4),const Arg2,const Arg3,const Arg4,const Arg5>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &)' : expects 5 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(679) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<4,boost::lambda::function_action<4,Result>>,detail::bi nd_ tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &)' : expects 4 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(558) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3,const Arg4>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &)' : expects 4 arguments - 2 provided with [ Arity=4, Act=boost::lambda::function_action<4> ] ..\..\boost\lambda\detail\bind_functions.hpp(532) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<4,boost::lambda::function_action<4,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(Par1,Par2,Par3),const Arg2,const Arg3,const Arg4>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3),const Arg2 &,const Arg3 &,const Arg4 &)' : expects 4 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(503) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<3,boost::lambda::function_action<3,Result>>,detail::bi nd_ tuple_mapper<const Arg1,const Arg2,const Arg3>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &)' : expects 3 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(387) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2,const Arg3>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &)' : expects 3 arguments - 2 provided with [ Arity=3, Act=boost::lambda::function_action<3> ] ..\..\boost\lambda\detail\bind_functions.hpp(361) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<3,boost::lambda::function_action<3,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(Par1,Par2),const Arg2,const Arg3>::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2),const Arg2 &,const Arg3 &)' : expects 3 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(333) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<2,boost::lambda::function_action<2,Result>>,detail::bi nd_ tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' ..\..\boost\lambda\detail\bind_functions.hpp(232) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<2,boost::lambda::function_action<2,Result>>,detail::bi nd_ tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' ..\..\boost\lambda\detail\bind_functions.hpp(232) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<2,boost::lambda::function_action<2,Result>>,detail::bi nd_ tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' ..\..\boost\lambda\detail\bind_functions.hpp(232) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' with [ Arity=2, Act=boost::lambda::function_action<2> ] ..\..\boost\lambda\detail\bind_functions.hpp(212) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' with [ Arity=2, Act=boost::lambda::function_action<2> ] ..\..\boost\lambda\detail\bind_functions.hpp(212) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1,const Arg2>::type>> boost::lambda::bind(const Arg1 &,const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' with [ Arity=2, Act=boost::lambda::function_action<2> ] ..\..\boost\lambda\detail\bind_functions.hpp(212) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<2,boost::lambda::function_action<2,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(Par1),const Arg2>::type>> boost::lambda::bind(Result (__cdecl &)(Par1),const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' ..\..\boost\lambda\detail\bind_functions.hpp(190) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<2,boost::lambda::function_action<2,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(Par1),const Arg2>::type>> boost::lambda::bind(Result (__cdecl &)(Par1),const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' ..\..\boost\lambda\detail\bind_functions.hpp(190) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2784: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<2,boost::lambda::function_action<2,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(Par1),const Arg2>::type>> boost::lambda::bind(Result (__cdecl &)(Par1),const Arg2 &)' : could not deduce template argument for 'overloaded function type' from 'overloaded function type' ..\..\boost\lambda\detail\bind_functions.hpp(190) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<1,boost::lambda::function_action<1,Result>>,detail::bi nd_ tuple_mapper<const Arg1>::type>> boost::lambda::bind(const Arg1 &)' : expects 1 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(91) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<Arity,Act>,detail::bind_tuple_mapper<const Arg1>::type>> boost::lambda::bind(const Arg1 &)' : expects 1 arguments - 2 provided with [ Arity=1, Act=boost::lambda::function_action<1> ] ..\..\boost\lambda\detail\bind_functions.hpp(71) : see declaration of 'boost::lambda::bind' test.cpp(39) : error C2780: 'const boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost:: lambda::action<1,boost::lambda::function_action<1,Result>>,detail::bi nd_ tuple_mapper<Result(__cdecl &)(void)>::type>> boost::lambda::bind(Result (__cdecl &)(void))' : expects 1 arguments - 2 provided ..\..\boost\lambda\detail\bind_functions.hpp(49) : see declaration of 'boost::lambda::bind'

Thank you.

Jacques Kerner

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