Re: [Boost-users] [tuple, lambda] predicate does not compile

17 Feb 2006

      Jaakko Jarvi schrieb:
...
On Feb 16, 2006, at 2:36 AM, Christian Rössel wrote:
...
Hello Newsgroup,
in the following code the call
bind (&boost::tuple::get<0>, _1)
does not compile whereas an analogous call with a non-template
parameter compiles fine. What am I doing wrong?
If I remember correctly, get has two overloads (one const, one  
without const).
One cannot take the address of an overloaded (member) function  
without specifying its type.
(This is without looking at the tuple code, so comes with a caveat)
Best, Jaakko Järvi
Thanks for the hint. If I add a "const std::string getA () const
{return a_;}" to the SearchForMe class then I have to change

bind (&SearchForMe::getA, _1) == "apple");

to

bind (static_cast
(&SearchForMe::getA), _1) == "apple");

or to

bind (static_cast
(&SearchForMe::getA), _1) == "apple");

and everthings works fine. However, if I do the same with the
tuple-code

bind (static_cast::*)()>
(&boost::tuple::get<0>), _1) == 15);

I still get compile errors:

error C2440: 'static_cast' : cannot convert from
'overloaded-function' to 'int (__thiscall
boost::tuples::tuple::* )(void)'
        with
        [
            T0=int,
            T1=double
        ]
        None of the functions with this name in scope match the
target type

The entire error message is attached.

Thanks,
Christian
...
...
I'm using boost 1.33.1 and Visual Studio 7.1
Thanks in advance,
Christian
#include <vector>
#include <algorithm>
#include <string>
#include 
#include 
#include 
class SearchForMe
{
  std::string a_;
public:
  std::string getA () {return a_;}
};
int main(int argc, char* argv[])
{
  using namespace std;
  using namespace boost::lambda;
vector<SearchForMe> foo;
  // compiles fine
  find_if (foo.begin (), foo.end (),
           bind (&SearchForMe::getA, _1) == "apple");
vector< boost::tuple > bar;
  // does not compile
  find_if (bar.begin (), bar.end (),
           bind (&boost::tuple::get<0>, _1) == 15);
return 0;
}
The error messages are:
Compiling...
boost_lambda.cpp
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2784: 'const
boost::lambda::lambda_functor>,detail::b 
ind_tuple_mapper::type>> boost::lambda::bind(const Arg1 &,const
Arg2 &)' : could not deduce template argument for 'overloaded
function type' from 'overloaded function type'
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(232)
: see declaration of 'boost::lambda::bind'
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2784: 'const
boost::lambda::lambda_functor>,detail::b 
ind_tuple_mapper::type>> boost::lambda::bind(const Arg1 &,const
Arg2 &)' : could not deduce template argument for 'overloaded
function type' from 'overloaded function type'
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(232)
: see declaration of 'boost::lambda::bind'
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2784: 'const
boost::lambda::lambda_functor,detail::bind_tuple_mapper::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>
        ]
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(212)
: see declaration of 'boost::lambda::bind'
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2784: 'const
boost::lambda::lambda_functor,detail::bind_tuple_mapper::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>
        ]
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(212)
: see declaration of 'boost::lambda::bind'
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2784: 'const
boost::lambda::lambda_functor,detail::bind_tuple_mapper::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>
        ]
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(212)
: see declaration of 'boost::lambda::bind'
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2784: 'const
boost::lambda::lambda_functor>,detail::b 
ind_tuple_mapper::type>> boost::lambda::bind(Result (__cdecl
&)(Par1),const Arg2 &)' : could not deduce template argument for
'overloaded function type' from 'overloaded function type'
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(190)
: see declaration of 'boost::lambda::bind'
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2784: 'const
boost::lambda::lambda_functor>,detail::b 
ind_tuple_mapper::type>> boost::lambda::bind(Result (__cdecl
&)(Par1),const Arg2 &)' : could not deduce template argument for
'overloaded function type' from 'overloaded function type'
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(190)
: see declaration of 'boost::lambda::bind'
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2784: 'const
boost::lambda::lambda_functor>,detail::b 
ind_tuple_mapper::type>> boost::lambda::bind(Result (__cdecl
&)(Par1),const Arg2 &)' : could not deduce template argument for
'overloaded function type' from 'overloaded function type'
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(190)
: see declaration of 'boost::lambda::bind'
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2780: 'const
boost::lambda::lambda_functor>,detail::b 
ind_tuple_mapper<const
Arg1>::type>> boost::lambda::bind(const Arg1 &)' : expects 1
arguments - 2 provided
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(91)
: see declaration of 'boost::lambda::bind'
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2780: 'const
boost::lambda::lambda_functor,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>
        ]
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(71)
: see declaration of 'boost::lambda::bind'
d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda 
\boost_lambda.cpp(31)
: error C2780: 'const
boost::lambda::lambda_functor>,detail::b 
ind_tuple_mapper::type>> boost::lambda::bind(Result (__cdecl &)(void))'
: expects 1 arguments - 2 provided
d:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(49)
: see declaration of 'boost::lambda::bind'
_______________________________________________
Boost-users mailing list
Boost-users@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/boost-users
------ Build started: Project: boost_lambda, Configuration: Release Win32 ------

Compiling...
boost_lambda.cpp
boost_lambda.cpp(47) : error C2440: 'static_cast' : cannot convert from 'overloaded-function' to 'int (__thiscall boost::tuples::tuple::* )(void)'
        with
        [
            T0=int,
            T1=double
        ]
        None of the functions with this name in scope match the target type
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::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
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1743) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor,detail::bind_tuple_mapper::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>
        ]
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1710) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::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
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1673) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::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
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1526) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor,detail::bind_tuple_mapper::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>
        ]
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1494) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::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
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1458) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::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
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1322) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor,detail::bind_tuple_mapper::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
        with
        [
            Arity=8,
            Act=boost::lambda::function_action<8>
        ]
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1291) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::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
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1257) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &,const Arg7 &)' : expects 7 arguments - 2 provided
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1123) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor,detail::bind_tuple_mapper::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>
        ]
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1092) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::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
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(1058) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &,const Arg6 &)' : expects 6 arguments - 2 provided
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(927) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor,detail::bind_tuple_mapper::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>
        ]
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(899) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::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
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(867) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &)' : expects 5 arguments - 2 provided
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(738) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor,detail::bind_tuple_mapper::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>
        ]
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(710) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3,Par4),const Arg2 &,const Arg3 &,const Arg4 &,const Arg5 &)' : expects 5 arguments - 2 provided
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(679) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &,const Arg4 &)' : expects 4 arguments - 2 provided
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(558) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor,detail::bind_tuple_mapper::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>
        ]
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(532) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2,Par3),const Arg2 &,const Arg3 &,const Arg4 &)' : expects 4 arguments - 2 provided
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(503) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &)' : expects 3 arguments - 2 provided
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(387) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor,detail::bind_tuple_mapper::type>> boost::lambda::bind(const Arg1 &,const Arg2 &,const Arg3 &)' : expects 3 arguments - 2 provided
        with
        [
            Arity=3,
            Act=boost::lambda::function_action<3>
        ]
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(361) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::type>> boost::lambda::bind(Result (__cdecl &)(Par1,Par2),const Arg2 &,const Arg3 &)' : expects 3 arguments - 2 provided
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(333) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper<const Arg1>::type>> boost::lambda::bind(const Arg1 &)' : expects 1 arguments - 2 provided
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(91) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor,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>
        ]
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(71) : see declaration of 'boost::lambda::bind'
boost_lambda.cpp(47) : error C2780: 'const boost::lambda::lambda_functor>,detail::bind_tuple_mapper::type>> boost::lambda::bind(Result (__cdecl &)(void))' : expects 1 arguments - 2 provided
        D:\home\roe\boost_1_33_1\boost\lambda\detail\bind_functions.hpp(49) : see declaration of 'boost::lambda::bind'

Build log was saved at "file://d:\home\roe\c++_tests\boost_lambda\boost_lambda\boost_lambda\Release\BuildLog.htm"
boost_lambda - 28 error(s), 0 warning(s)

---------------------- Done ----------------------

    Build: 0 succeeded, 1 failed, 0 skipped