[Boost-Users] function object with lambda

From: Jaakko Jarvi (jajarvi_at_[hidden])
Date: 2003-07-04 11:57:26

In our last exciting episode "Matt Hurd" wrote:

> Not sure how to force a for_each with a lambda to invoke the random
>   function object successively.  In the for_each version below
>   get_long is called just once.  Not sure how to use var,
>   std_function, bind or something else to overcome this.  I'm sure
>   the answer is straight forward...  anyone?

> for_each(v.begin(),v.end(), _1 = gen_long() );

Here, gen_long() is invoked and the resulting value is stored in
the lambda functor, which is passed to for_each.
You need to delay the call of gen_long with bind:

for_each(v.begin(), v.end(), _1 = bind(gen_long));

  Jaakko