Re: [Boost-users] How to reverse the logic of a Predicate in boost?

From: Jeff Flinn (TriumphSprint2000_at_[hidden])
Date: 2006-02-21 16:38:02

yinglcs2_at_[hidden] wrote:
> I have the following code which copy items if certain
> condition is met:
>
> copy_if(a.begin(), a.end(), back_inserter(b), bind(
> &::feq<float>, _1, max)) );
>
> How can I reverse the logic of that?
> how can I call std::not1() in the boost lambda bind
> library?

 copy_if(  a.begin()
        ,  a.end()
        ,  back_inserter(b)
        , !bind( &::feq<float>, _1, max )
        );

Should do it, at least with 1.33.1, if that's what you mean by 'reverse the 
logic'.

Jeff Flinn