Re: [boost] [bind]bind question

Subject: Re: [boost] [bind]bind question
From: Ben Pope (benpope81_at_[hidden])
Date: 2012-05-27 07:22:14

On Sunday, May 27, 2012 05:40 PM, Max wrote:
> Hi,
>
> I have the following code:
>
> bool do_something_conditional(int *handle, const boost::function<bool(int)>
> &pred);
> bool pred_a(int handle);
> bool pred_b(int handle, int n1, int n2);
>
> bool do_something(int *handle, int n1, int n2)
> {
> 	return do_something_conditional(handle,
> 		boost::bind(std::logical_and<bool>(),
> 			boost::not1(&pred_a),
> 			boost::bind(&pred_b, _1, n1, n2)));
> }
>
> But it does not compile.

This should work and is probably clearer:

    return do_something_conditional(handle,
       boost::bind(std::logical_and<bool>(),
          !boost::bind(&pred_a, _1),
          boost::bind(&pred_b, _1, n1, n2)));

Ben