Re: [Boost-Users] bind question

4 Jan 2002


      From: "Duane Murphy" 
...
Is there a syntax for making boost::bind bind to functions that are
templates?
No. The reason is that a function template is not a function. It is an
entity that can generate functions.

You can't pass the name of a function template as an argument.
...
Here is an (extremally simplified) example that doesnt compile:
#include 
template < class Function >
void f( Function func )
{
    func( 46 );
}
void g( int num )
{
    num++;
}
int main( void )
{
   boost::bind( f, g )();
    boost::bind( f, _1 )( g );
return 0;
}
The two bind lines in main both get an error "call of non-function".
Is there a way to make this work?
Yes, use a function object:

#include 

struct F
{
    template < class Function > void operator()( Function func )
    {
        func( 46 );
    }
} f;

void g( int num )
{
    num++;
}

int main( void )
{
    boost::bind<void>( f, g )();
    boost::bind<void>( f, _1 )( g );
    return 0;
}

--
Peter Dimov
Multi Media Ltd.