Re: [Boost-users] [bind] How do I....?

On Tue, Aug 18, 2009 at 11:10 AM, Michael Caisse wrote:

Robert Jones wrote:

...

2009/8/18 Björn Karlsson mailto:Bjorn.Karlsson@readsoft.com>

   2) Use Boost.Lambda's bind() and dereference the placeholder    directly in the bind expression.

    for_each(vec.begin(), vec.end(), bind(&foo, *_1));

Much as I like Lambda for virgin code, in my work code base there's a very visible inclusion of Boost.Bind, with placeholders in the global namespace. I've concluded that the pain of clashing placeholders just isn't worth it, so I steer clear of Lambda now.

Thanks Bjorn.

 - Rob.

Rob -

Let me suggest Boost.Phoenix. Phoenix is an amazingly powerful library that will handle all of your bind and lambda needs. You also wont suffer from the plagued global namespace fiasco by mixing Boost.Bind and Boost.Lambda.

Your example with Phoenix:

#include <vector> #include <algorithm> #include #include #include #include

struct A {};

void foo( const A& ) {}

int main() {  using namespace boost::phoenix;  using namespace boost::phoenix::arg_names;

 std::vector< boost::shared_ptr< A > > vec;  vec.push_back( boost::shared_ptr< A >( new A ) );

 std::for_each( vec.begin(), vec.end(),                 bind( &foo, *arg1 ) );  return 0; }

I hope this helps out.

This is another vote for Boost.Phoenix2, its bind replaces all possible uses I have ever seen of Boost.Bind or Boost.Lambda::bind and in an easier way.