Re: [Boost-users] [bind] Template deduction

From: Robert Dailey (rcdailey_at_[hidden])
Date: 2008-03-05 11:42:32

On Wed, Mar 5, 2008 at 10:36 AM, Robert Dailey <rcdailey_at_[hidden]> wrote:

> On Tue, Mar 4, 2008 at 7:16 PM, Marshall Clow <marshall_at_[hidden]> wrote:
> >
> > Would this work?
> >       std::for_each( myStrings.begin(), myStrings.end(), boost::bind(
> > &DoFoo<std::string>, 5, _1 ) );
>
>
> Well, the example I gave was probably overly simple. The real example uses
> a boost::python::list, which can either take a char* or a std::string. At
> the time I'm doing the boost::bind, I do not know what type is being passed
> in.
>

Below is the real example:

//=========================================================================================
bool PyInterpreter::SetSystemPath( std::vector<boost::filesystem::path>
const& pathList )
{
    bool success = true;

    try
    {
        using namespace boost::python;

        list newsyspath;

        std::for_each( pathList.begin(), pathList.end(), boost::bind(
&list::insert<boost::filesystem::path>, newsyspath, 0, _1 ) );

        object sys = GetNamespace( "sys" );
        sys["path"] = newsyspath;
    }

    catch(...)
    {
        PyErr_Print();
        success = false;
        assert( 0 );
    }

    return false;
}

If you examine my std::for_each() above, you'll notice that I'm simply
trying to push 'path' objects into boost::python::list, which won't work but
it should at least compile. However the MSVC compiler is telling me that
boost::bind expects 2 arguments, not 4. What am I doing wrong?