Re: [Boost-users] for_each_until like algorithm

Subject: Re: [Boost-users] for_each_until like algorithm
From: Peter Barker (newbarker_at_[hidden])
Date: 2009-02-11 07:21:28

On Wed, Feb 11, 2009 at 12:06 PM, Peter Barker <newbarker_at_[hidden]> 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