[Boost-users] [gil][bind] How to bind gil::at_c ?

From: Christian Henning (chhenning_at_[hidden])
Date: 2007-04-29 14:32:25

Hi there my compiler doesn't like binding the gil::at_c function. I'm
using MSVC 7.1 SP1. Please correct if I'm wrong but I think you need
to supply a function pointer cast for overloaded function when using
this compiler. But for some reasons I cannot make it happen.

template < typename CHANNEL >
void set_zero( CHANNEL c )
{
   c = 0;
}

int main()
{

   rgb8_image_t src;
   bmp_read_image( ".\\flower.bmp", src );

   typedef channel_type<rgb8_pixel_t>::type return_t;
   add_reference<return_t>::type (*AA)( rgb8_pixel_t& ) = &gil::at_c<0>;

   for_each( view( src ).begin()
            , view( src ).end()
            , bind( &set_zero, bind( AA, _1 )));

   return 0;
}

compiler error is:

\gil\repos\gil_2\libs\gil\toolbox\test.cpp(74) : error C2440:
'initializing' : cannot convert from 'overloaded-function' to
'boost::add_reference<T>::type (__cdecl *)(boost::gil::rgb8_pixel_t
&)'
        with
        [
            T=boost::gil::bits8
        ]
        None of the functions with this name in scope match the target type

Thanks ahead,
Christian