Re: [Boost-users] for_each_until like algorithm

11 Feb 2009


      On Wed, Feb 11, 2009 at 12:06 PM, Peter Barker  wrote:
...
Hi,
I just wondered if there was already an algorithm (or way to compose
one) in Boost that would allow me to iterate over a container of
pointers to objects calling a function on each one and completing when
one of them returned a particular value?
For example, I have a master/child relationship and the master has a
method called shouldCalculate(). Whether this returns true is partly
dependent on what the children return for their shouldCalculate()
method. So I'd like to say something like this:
bool Master::shouldCalculate()
{
    // Look at data at the master level to see if it's stale. If it
is, return true.
// See if any of the children should calculate
    bool staleChildren =
boost::for_each_until(children_.begin(),children_.end(),
boost::bind(&Child::shouldCalculate,_1),until_true_returned);
return staleChildren;
}
Regards,
Pete
Sorry for the noise. Just figured std::find_if() should do it.

Regards,

Pete