[Boost-users] negating a functor in a remove_copy_if

From: PJ Durai (pjdtech2000_at_[hidden])
Date: 2008-03-06 00:44:51

Hello everyone,

I couldn't figure out how to use a logical negation in the following situation.

struct IsConditionValid : public unary_function<Event, bool>
{
public:
   bool operator() (const Event& event)const {}
};

remove_copy_if(events.begin(), events.end(),
                           back_inserter(result),
                           IsConditionValid());  <--  how to negate
the condition object?

What I really need is   '! IsConditionValid()'.

How can it be done using may be boost::bind ?

appreciate your time.
thanks
pj