I love C++, really I do, but damn my head hurts.
#include
#include
using namespace std;
using namespace boost;
void hello( int a )
{
while( a– ) cout << "Hi Mom: " << a << endl;
}
int main()
{
const int count = 5;
/*some type*/ func = bind( hello, count );
func();
}
The problem is, what the hell should go in place of /*some type*/? I expected void (*)(void), but that doesn’t work.
Are you abusing bind to simulate a closure?
try:
bind( hello, count )();
Bheesh,
I’m just trying to bind a parameter now, and call the functor later.
Can you really simulate a closure with bind? I’m no closure expert, but how is bind( hello, count)(); any different from hello( count ); ?
The way I see it, the only practical use for bind is to pass it into another function template, such as for_each. That way, the compiler deduces the template parameter, and you don’t have to worry about the complicated type of the bind functor.
-Mark
Re: closure simulation.
What if bind is lexical (that is, does it preserve the value of count or keep a reference)? If it’ s lexical, it’s close enough to my understanding of what a closure is.
I was trying to make your usage scenario work. You are binding, then calling. I suppose you want to pass the bound functor to a function and that’s why you are trying to deduce the type?
Bheesh