Re: [Boost-users] [bind] How to dereference _1 in a boost::bind expression

Subject: Re: [Boost-users] [bind] How to dereference _1 in a boost::bind expression
From: Robert Jones (robertgbjones_at_[hidden])
Date: 2008-10-02 06:39:48

On Thu, Oct 2, 2008 at 11:12 AM, Peter Barker <newbarker_at_[hidden]> wrote:
> Hello,
>
> Here's an example of my problem:
>
> #include <algorithm>
> #include <vector>
>
> #include <boost/bind.hpp>
>
> class TheClass
> {
> };
>
> void accept(TheClass& tc)
> {
> }
>
> int main()
> {
>        std::vector<TheClass*> cont;
>
>        // Compile error - how to dereference _1 ???
>        std::for_each(cont.begin(),cont.end(),boost::bind(&accept,_1));
> }
>
> How can I dereference _1 so I can use the accept function?

#include <algorithm>
#include <vector>

#include <boost/lambda/bind.hpp>
#include <boost/lambda/lambda.hpp>

class TheClass
{
};

void accept(TheClass& tc)
{
}

int main()
{
       using namespace boost;
       using namespace boost::lambda;

       std::vector<TheClass*> cont;

       // Compile error - how to dereference _1 ???
       std::for_each(cont.begin(),cont.end(),bind(accept,*_1));
}

- Rob.