Re: [Boost-users] member data pointer and nested bind

From: Peter Dimov (pdimov_at_[hidden])
Date: 2006-02-19 08:23:35

JaeWook Choi wrote:

>  vector<CTestClass>::iterator it_f1 =
>    find_if(vecTestClass.begin(), vecTestClass.end(),
>    bind(::PtInRect, &bind(&CTestClass::rc, _1), ptTest) );    //
> compile error!

You can't use &bind with boost::bind, only with boost::lambda::bind. If you 
want to keep using boost::bind:

template<class T> struct address_of
{
    typedef T* result_type;
    result_type operator()( T & t ) const { return &t; }
};

vector<CTestClass>::iterator it_f1 =
   find_if(vecTestClass.begin(), vecTestClass.end(),
   bind( ::PtInRect, bind( address_of<RECT>(), bind(&CTestClass::rc, _1) ), 
ptTest ) );

If you switch to lambda::bind you might have problems with the __stdcall 
convention that PtInRect uses; bind<BOOL>( ::PtInRect, ... ) might get you 
around that.