[C++-sig] template function

[Luca Sbardella]

Sure,
here is a code with the problem

#include <vector>
#include <boost/python.hpp>
#include <boost/python/wrapper.hpp>
#include <boost/python/detail/prefix.hpp>
#include <boost/python/converter/return_from_python.hpp>
#include <boost/python/call.hpp>

    template<class T>
    class dataserie  {
    public:
        typedef T                                        value_type;
        typedef std::vector<T>                              container;
        typedef typename container::iterator            iterator;
        typedef typename container::const_iterator      const_iterator;

        dataserie(){}
        virtual ~dataserie(){}

        bool              empty()        const     {return m_data.empty();}
        unsigned          size()        const     {return m_data.size();}
        const_iterator    begin()       const   {return m_data.begin();}
        const_iterator    end()         const   {return m_data.end();}

        template<class L>
        L tolist()  const {
            L list;
            for(const_iterator it = m_data.begin();it!=m_data.end();++it)
                list.append(*it);
            return list;
        }
    private:
        container   m_data;
    };

    template<class D>
    void export_dataserie(const std::string& name)  {

        typedef dataserie<D>                         container;
        typedef typename container::value_type        value_type;

        boost::python::class_<container>(name.c_str())
            .def("__len__",               &container::size)
            .add_property("size",         &container::size)
            .add_property("empty",        &container::empty)
            .def("list",                &container::tolist<
boost::python::list > )
            ;
    }

    BOOST_PYTHON_MODULE(testlib)  {

        export_dataserie<double>("test");

    }

when I compile the file I get the following

make all
Building file: ../dataserie.cpp
Invoking: GCC C++ Compiler
g++ -I/usr/include/python2.5 -I/usr/local/include -O0 -g3 -Wall -c
-fmessage-length=0 -MMD -MP -MF"dataserie.d" -MT"dataserie.d" -o"dataserie.o"
"../dataserie.cpp"
../dataserie.cpp: In function 'void export_dataserie(const std::string&)':
../dataserie.cpp:45: error: expected primary-expression before '>' token
../dataserie.cpp:45: error: expected primary-expression before ')' token

line 45 is the one with
.def("list",                &container::tolist< boost::python::list > )

Luca



On 29/08/2007, Stefan Seefeld <seefeld at sympatico.ca> wrote:
>
> Luca Sbardella wrote:
> > Thanks Dave,
> > but I did put a concrete type in the template argument.
> > My previous email was a bit confusing.
> > Here is the function template used for exporting
>
> [...]
>
> > In function 'void export_test(const std::string&)':
> > error: expected primary-expression before '>' token
> > error: expected primary-expression before ')' token
>
> It would be helpful if you would give a full (minimal)
> source code exhibiting the error, together with a complete
> error message (in particular, line numbers).
>
> Thanks,
>                 Stefan
>
> --
>
>       ...ich hab' noch einen Koffer in Berlin...
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