Re: [Boost-users] Is there such stuff in boost?

From: Bill Somerville (bill_at_[hidden])
Date: 2008-04-30 05:21:54

Max wrote:
> Hi all
>
> I'm wondering if there is such stuff in boost, or anything similar:
>
> 	double d0, d1, d2, d3;
> 	boost::array<double &, 4> array = {{d0, d1, d2, d3}};
> 	for(int i=0; i<4; i++) array[i] = i;
> 	assert(d2 == 2);
>
> or
>
> 	double d0, d1, d2, d3;
> 	boost::array<double, 4> array;
> 	boost::bind(array[0], d0);
> 	boost::bind(array[1], d1);
> 	boost::bind(array[2], d2);
> 	boost::bind(array[3], d3);
> 	for(int i=0; i<4; i++) array[i] = i;
> 	assert(d2 == 2);
>   
Sounds like you need the reference wrappers
http://www.boost.org/doc/libs/1_35_0/doc/html/ref.html which are
designed for passing references to function objects where passing a
value would be inappropriate or inefficient, as they are
CopyConstructible and Assignable they are also suitable for storage in
containers where simple pointers are inappropriate.
> Thanks
> Max
>
>   
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-- 
Bill Somerville
Class Design Limited