RE: [boost] boost::ref simple question

From: Michiel Salters (michiel.salters_at_[hidden])
Date: 2004-11-09 06:45:26

The boost::function template works with boost::ref according to the docs,
so try boost::function< int ( int ) > ( boost::ref( Op() ) )

HTH,
Michiel Salters

> -----Original Message-----
> From: boost-bounces_at_[hidden]
> [mailto:boost-bounces_at_[hidden]]On Behalf Of Neal D. Becker
> Sent: maandag 8 november 2004 16:16
> To: boost_at_[hidden]
> Subject: [boost] boost::ref simple question
> 
> 
> This must be a common question.
> 
> I want to use std::transform with a function object that is 
> expensive to
> copy, so I want to pass by reference.  I tried to use 
> boost::ref for this,
> but this simple test doesn't work:
> 
> struct Op {
>   int operator() (int x) { return 1 + x;}
>   Op() {}
> private:
>   Op (const Op&);
>   
> };
> 
> int main() {
>   vector<int> x (4);
>   vector<int> y (4);
>   Op o;
>   std::transform (x.begin(), x.end(), y.begin(), boost::ref(o));
> }
> 
> Any suggestion?
> 
> _______________________________________________
> Unsubscribe & other changes: 
> http://lists.boost.org/mailman/listinfo.cgi/boost
> 

This e-mail and any attachment is for authorised use by the intended recipient(s) only. It may contain proprietary material, confidential information and/or be subject to legal privilege. It should not be copied, disclosed to, retained or used by, any other party. If you are not an intended recipient then please promptly delete this e-mail and any attachment and all copies and inform the sender. Thank you.