[Boost-users] doubt on lambda expression

Subject: [Boost-users] doubt on lambda expression
From: Emanuele Rocci (rocciemanuele_at_[hidden])
Date: 2009-11-11 06:04:49

Hi AllI started playing with boost::lambda and I need some help or some clarification about itor some hint to better understanding how does it work.
I have this piece of code
using namespace boost::lambda;using boost::lambda::var;
int main(int argc, char** argv) {   std::vector< int > myList;   myList.push_back(100);   myList.push_back(200);       int interval = 20;
   std::for_each( myList.begin(), myList.end(),        (        std::cout << "value: " << _1 << "\n",        std::cout << "interval: " << var( interval ) << "\n",        var( interval )++        ));}
I understood that writing a lambda expression would be a substitutefor writing a functor.
I expected the following result
value: 100interval: 20value: 200interval: 21
Instead I had the following
intervalfirst value: 1002020021
Why the strings "interval" and "first" are not written for each value and how can I achieve this?Kind RegardsMn
                                               
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