# Pastebin F1FbhkuM
In file included from /home/rohit/Projects/mlpack/src/mlpack/bindings/cli/default_param.hpp:79:0,
                 from /home/rohit/Projects/mlpack/src/mlpack/bindings/cli/cli_option.hpp:21,
                 from /home/rohit/Projects/mlpack/src/mlpack/tests/cli_test.cpp:14:
/home/rohit/Projects/mlpack/src/mlpack/bindings/cli/default_param_impl.hpp: In instantiation of ‘std::__cxx11::string mlpack::bindings::cli::DefaultParamImpl(const mlpack::util::ParamData&, const typename boost::disable_if<arma::is_arma_type<T1> >::type*, const typename boost::disable_if<mlpack::util::IsStdVector<T> >::type*, const typename boost::disable_if<mlpack::data::HasSerialize<T> >::type*, const typename boost::disable_if<std::is_same<T, std::__cxx11::basic_string<char> > >::type*, const typename boost::disable_if<std::is_same<T, std::tuple<mlpack::data::DatasetMapper<mlpack::data::IncrementPolicy, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, arma::Mat<double> > > >::type*) [with T = mlpack::kernel::GaussianKernel; std::__cxx11::string = std::__cxx11::basic_string<char>; typename boost::disable_if<arma::is_arma_type<T1> >::type = void; typename boost::disable_if<mlpack::util::IsStdVector<T> >::type = void; typename boost::disable_if<mlpack::data::HasSerialize<T> >::type = void; typename boost::disable_if<std::is_same<T, std::__cxx11::basic_string<char> > >::type = void; typename boost::disable_if<std::is_same<T, std::tuple<mlpack::data::DatasetMapper<mlpack::data::IncrementPolicy, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, arma::Mat<double> > > >::type = void]’:
/home/rohit/Projects/mlpack/src/mlpack/bindings/cli/default_param.hpp:71:32:   required from ‘void mlpack::bindings::cli::DefaultParam(const mlpack::util::ParamData&, const void*, void*) [with T = mlpack::kernel::GaussianKernel]’
/home/rohit/Projects/mlpack/src/mlpack/bindings/cli/cli_option.hpp:135:60:   required from ‘mlpack::bindings::cli::CLIOption<N>::CLIOption(N, const string&, const string&, const string&, const string&, bool, bool, bool) [with N = mlpack::kernel::GaussianKernel; std::__cxx11::string = std::__cxx11::basic_string<char>]’
/home/rohit/Projects/mlpack/src/mlpack/tests/cli_test.cpp:845:3:   required from here
/home/rohit/Projects/mlpack/src/mlpack/bindings/cli/default_param_impl.hpp:30:7: error: no match for ‘operator<<’ (operand types are ‘std::ostringstream {aka std::__cxx11::basic_ostringstream<char>}’ and ‘mlpack::kernel::GaussianKernel’)
   oss << boost::any_cast<T>(data.value);
   ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/6/iterator:64:0,
                 from /usr/include/boost/operators.hpp:95,
                 from /usr/include/boost/serialization/strong_typedef.hpp:26,
                 from /usr/include/boost/serialization/serialization.hpp:14,
                 from /home/rohit/Projects/mlpack/src/mlpack/prereqs.hpp:74,
                 from /home/rohit/Projects/mlpack/src/mlpack/core.hpp:232,
                 from /home/rohit/Projects/mlpack/src/mlpack/tests/cli_test.cpp:12:
/usr/include/c++/6/ostream:108:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ostream_type& (*)(std::basic_ostream<_CharT, _Traits>::__ostream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
       operator<<(__ostream_type& (*__pf)(__ostream_type&))
       ^~~~~~~~
/usr/include/c++/6/ostream:108:7: note:   no known conversion for argument 1 from ‘mlpack::kernel::GaussianKernel’ to ‘std::basic_ostream<char>::__ostream_type& (*)(std::basic_ostream<char>::__ostream_type&) {aka std::basic_ostream<char>& (*)(std::basic_ostream<char>&)}’
/usr/include/c++/6/ostream:117:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ios_type& (*)(std::basic_ostream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>; std::basic_ostream<_CharT, _Traits>::__ios_type = std::basic_ios<char>]
       operator<<(__ios_type& (*__pf)(__ios_type&))
       ^~~~~~~~
/usr/include/c++/6/ostream:117:7: note:   no known conversion for argument 1 from ‘mlpack::kernel::GaussianKernel’ to ‘std::basic_ostream<char>::__ios_type& (*)(std::basic_ostream<char>::__ios_type&) {aka std::basic_ios<char>& (*)(std::basic_ios<char>&)}’
/usr/include/c++/6/ostream:127:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
       operator<<(ios_base& (*__pf) (ios_base&))
       ^~~~~~~~
/usr/include/c++/6/ostream:127:7: note:   no known conversion for argument 1 from ‘mlpack::kernel::GaussianKernel’ to ‘std::ios_base& (*)(std::ios_base&)’
/usr/include/c++/6/ostream:166:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
       operator<<(long __n)
       ^~~~~~~~
/usr/include/c++/6/ostream:166:7: note:   no known conversion for argument 1 from ‘mlpack::kernel::GaussianKernel’ to ‘long int’
/usr/include/c++/6/ostream:170:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
       operator<<(unsigned long __n)
       ^~~~~~~~
/usr/include/c++/6/ostream:170:7: note:   no known conversion for argument 1 from ‘mlpack::kernel::GaussianKernel’ to ‘long unsigned int’
/usr/include/c++/6/ostream:174:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(bool) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
       operator<<(bool __n)
       ^~~~~~~~
/usr/include/c++/6/ostream:174:7: note:   no known conversion for argument 1 from ‘mlpack::kernel::GaussianKernel’ to ‘bool’
In file included from /usr/include/c++/6/ostream:638:0,
                 from /usr/include/c++/6/iterator:64,
                 from /usr/include/boost/operators.hpp:95,
                 from /usr/include/boost/serialization/strong_typedef.hpp:26,
                 from /usr/include/boost/serialization/serialization.hpp:14,
                 from /home/rohit/Projects/mlpack/src/mlpack/prereqs.hpp:74,
                 from /home/rohit/Projects/mlpack/src/mlpack/core.hpp:232,
                 from /home/rohit/Projects/mlpack/src/mlpack/tests/cli_test.cpp:12:
/usr/include/c++/6/bits/ostream.tcc:91:5: note: candidate: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short int) [with _CharT = char; _Traits = std::char_traits<char>]
     basic_ostream<_CharT, _Traits>::
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/6/bits/ostream.tcc:91:5: note:   no known conversion for argument 1 from ‘mlpack::kernel::GaussianKernel’ to ‘short int’
In file included from /usr/include/c++/6/iterator:64:0,
                 from /usr/include/boost/operators.hpp:95,
                 from /usr/include/boost/serialization/strong_typedef.hpp:26,
                 from /usr/include/boost/serialization/serialization.hpp:14,
                 from /home/rohit/Projects/mlpack/src/mlpack/prereqs.hpp:74,
                 from /home/rohit/Projects/mlpack/src/mlpack/core.hpp:232,
                 from /home/rohit/Projects/mlpack/src/mlpack/tests/cli_test.cpp:12:
/usr/include/c++/6/ostream:181:7: note: candidate: std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(short unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]
       operator<<(unsigned short __n)
       ^~~~~~~~
/usr/include/c++/6/ostream:181:7: note:   no known conversion for argument 1 from ‘mlpack::kernel::GaussianKernel’ to ‘short unsigned int’
In file included from /usr/include/c++/6/ostream:638:0,
                 from /usr/include/c++/6/iterator:64,
                 from /usr/include/boost/operators.hpp:95,
                 from /usr/include/boost/serialization/strong_typedef.hpp:26,
                 from /usr/include/boost/serialization/serialization.hpp:14,
                 from /home/rohit/Projects/mlpack/src/mlpack/prereqs.hpp:74,
                 from /home/rohit/Projects/mlpack/src/mlpack/core.hpp:232,
                 from /home/rohit/Projects/mlpack/src/mlpack/tests/cli_test.cpp:12:
/usr/include/c++/6/bits/ostream.tcc:105:5: note: candidate: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char; _Traits = std::char_traits<char>]
     basic_ostream<_CharT, _Traits>::
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/6/bits/ostream.tcc:105:5: note:   no known conversion for argument 1 from ‘mlpack::kernel::GaussianKernel’ to ‘int’