Hi folks,

I am trying to use eval_pow() and eval_powm()

My code is like this and I am using Visual Studio 12:

#include <boost/multiprecision/cpp_int.hpp>
...
boost::multiprecision::cpp_int pow("1234567");
boost::multiprecision::cpp_int base(3);
boost::multiprecision::cpp_int result = 0;

boost::multiprecision::default_ops::eval_pow(result, base, pow);



I cannot figure out what's going on wrong when I compile it, the error message is like the following, Can anyone shed some light please?


D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(146): error C2039: 'unsigned_types' : is not a member of 'boost::multiprecision::number<boost::multiprecision::backends::cpp_int_backend<0,0,signed_magnitude,unchecked,std::allocator<boost::multiprecision::limb_type>>,et_on>'
1>          D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(191) : see reference to class template instantiation 'boost::multiprecision::detail::canonical_imp<Val,Backend,boost::mpl::int_<1>>' being compiled
1>          with
1>          [
1>              Val=unsigned char
1>  ,            Backend=double_type
1>          ]
1>          D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/integer_ops.hpp(309) : see reference to class template instantiation 'boost::multiprecision::detail::canonical<unsigned char,double_type>' being compiled
1>          KeyGen.cpp(152) : see reference to function template instantiation 'void boost::multiprecision::default_ops::eval_powm<boost::multiprecision::cpp_int,int>(Backend &,const Backend &,const Backend &,Integer)' being compiled
1>          with
1>          [
1>              Backend=boost::multiprecision::cpp_int
1>  ,            Integer=int
1>          ]
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(146): error C2146: syntax error : missing ',' before identifier 'unsigned_types'
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(146): error C2065: 'unsigned_types' : undeclared identifier
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(148): error C2977: 'boost::mpl::find_if' : too many template arguments
1>          D:\Develop\C++\boost_1_55_1\boost/mpl/find_if.hpp(33) : see declaration of 'boost::mpl::find_if'
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(148): error C2955: 'boost::mpl::find_if' : use of class template requires template argument list
1>          D:\Develop\C++\boost_1_55_1\boost/mpl/find_if.hpp(33) : see declaration of 'boost::mpl::find_if'
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(136): error C2039: 'signed_types' : is not a member of 'boost::multiprecision::number<boost::multiprecision::backends::cpp_int_backend<0,0,signed_magnitude,unchecked,std::allocator<boost::multiprecision::limb_type>>,et_on>'
1>          D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(191) : see reference to class template instantiation 'boost::multiprecision::detail::canonical_imp<Val,Backend,boost::mpl::int_<0>>' being compiled
1>          with
1>          [
1>              Val=int
1>  ,            Backend=double_type
1>          ]
1>          D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/integer_ops.hpp(310) : see reference to class template instantiation 'boost::multiprecision::detail::canonical<Integer,double_type>' being compiled
1>          with
1>          [
1>              Integer=int
1>          ]
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(136): error C2146: syntax error : missing ',' before identifier 'signed_types'
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(136): error C2065: 'signed_types' : undeclared identifier
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(138): error C2977: 'boost::mpl::find_if' : too many template arguments
1>          D:\Develop\C++\boost_1_55_1\boost/mpl/find_if.hpp(33) : see declaration of 'boost::mpl::find_if'
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/number_base.hpp(138): error C2955: 'boost::mpl::find_if' : use of class template requires template argument list
1>          D:\Develop\C++\boost_1_55_1\boost/mpl/find_if.hpp(33) : see declaration of 'boost::mpl::find_if'
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/integer_ops.hpp(336): error C2780: 'enable_if<boost::multiprecision::backends::is_trivial_cpp_int<boost::multiprecision::backends::cpp_int_backend<MinBits,MaxBits,SignType,Checked,Allocator>>,void>::type boost::multiprecision::backends::eval_right_shift(boost::multiprecision::backends::cpp_int_backend<MinBits,MaxBits,SignType,Checked,Allocator> &,T)' : expects 2 arguments - 1 provided
1>          D:\Develop\C++\boost_1_55_1\boost/multiprecision/cpp_int/bitwise.hpp(355) : see declaration of 'boost::multiprecision::backends::eval_right_shift'
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/integer_ops.hpp(336): error C2780: 'enable_if_c<!boost::multiprecision::backends::is_trivial_cpp_int<boost::multiprecision::backends::cpp_int_backend<MinBits,MaxBits,SignType,Checked,Allocator>>::value,void>::type boost::multiprecision::backends::eval_right_shift(boost::multiprecision::backends::cpp_int_backend<MinBits,MaxBits,SignType,Checked,Allocator> &,boost::multiprecision::double_limb_type)' : expects 2 arguments - 1 provided
1>          D:\Develop\C++\boost_1_55_1\boost/multiprecision/cpp_int/bitwise.hpp(298) : see declaration of 'boost::multiprecision::backends::eval_right_shift'
1>D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/integer_ops.hpp(336): error C2780: 'void boost::multiprecision::default_ops::eval_right_shift(T &,const T &,const V)' : expects 3 arguments - 1 provided
1>          D:\Develop\C++\boost_1_55_1\boost/multiprecision/detail/default_ops.hpp(758) : see declaration of 'boost::multiprecision::default_ops::eval_right_shift'

------------------------------
Thanks,
-Anderson Lebowski