How to use lambda functions with boost::bind/std::bind in VC++ 2010?

Question

I have some lambda functions which I want to bind using either boost::bind or std::bind. (Don\'t care which one, as long as it works.) Unfortunately both of them give me differe

Answer 1

I think you might be interested in this MSDN forum post. Sounds like the poster had the same problem as yours, and lodged a bug with MS Connect.

Answer 2

std::function<void ()> f1 = [](){ std::cout<<"f1()"<<std::endl; };
std::function<void (int)> f2 = [](int x){ std::cout<<"f2() x="<<x<<std::endl; };
boost::function<void ()> f3 = [](){ std::cout<<"f3()"<<std::endl; };
boost::function<void (int)> f4 = [](int x){ std::cout<<"f4() x="<<x<<std::endl; };

//do you still wanna bind?
std::bind(f1)(); //ok
std::bind(f2, 13)(); //ok
std::bind(f3)(); //ok
std::bind(f4, 13)(); //ok

//do you still wanna bind?
boost::bind(f1)(); //ok
boost::bind(f2, 13)(); //ok
boost::bind(f3)(); //ok
boost::bind(f4, 13)(); //ok

Answer 3

You need to manually specify the return type:

boost::bind<void>(f)();
boost::bind<int>(f2, 13)();

You can also write yourself a template-function to deduce the return type automagically using Boost.FunctionTypes to inspect your lambda's operator(), if you don't like to explicitly tell bind.