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

From: Sebastian Redl (sebastian.redl_at_[hidden])
Date: 2006-02-01 07:07:49

Daniel Lidström wrote:

>   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?
>Thanks in advance!
>  
>
Yes, but you need binding syntax:

typedef list< list< int > > lli;
for_each(ll.begin(), ll.end(), var(count) += bind(&lli::size, _1));

Sebastian Redl