Re: [Boost-users] Using lambda to count elements in list of lists

Thorsten Ottosen wrote:

Daniel Lidström wrote:

...

int main() { int count = 0; list ll; for_each(ll.begin(), ll.end(), var(count)+=(_1).size()); }

This will not compile: (13): error C2039: 'size': is not a member of 'boost::lambda::lambda_functor<T>' Is this possible to do?

AFAICT, no. Not unless the type of _1 implements all possible member functions in the world :-)

for_each( ll.begin(), ll.end(), count += bind( &list<int>::size, _1 ) ); works for me.