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

2 Oct 2008

      On Thu, Oct 2, 2008 at 11:51 AM, Franz Alt <f.alt@gmx.net> wrote:
...
Robert Jones schrieb:
...
On Thu, Oct 2, 2008 at 11:12 AM, Peter Barker <newbarker@gmail.com> 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.
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Hi Rob,
with
std::for_each(cont.begin(),cont.end(),bind(&accept,*_1));
you can dereference _1.
Best regards
Franz
Franz,

I think that gave an illegal indirection compiler error.

Regards,

Pete