Re: [boost] simple range adapter

Subject: Re: [boost] simple range adapter
From: Neal Becker (ndbecker2_at_[hidden])
Date: 2009-10-06 10:15:38

Mathias Gaunard wrote:

> Neal Becker wrote:
> 
>> OK, how about the attached?
> 
> In your attached example,
> 
> int main () {
>    double x[10];
>    for (int i = 0; i < 10; ++i)
>      x[i] = i;
> 
>    double y = sum (make_array_range (x, 10));
>    std::cout << y << '\n';
> }
> 
> You could write instead of writing make_array_range(x, 10):
> - x (arrays are ranges)
> - as_array(x) (as_array is a no-op here, this function is only useful
> for arrays of chars which are a special case)
> - make_iterator_range(x, x+10) (the general-purpose mechanism to define
> ranges from iterators)
> 
You're correct, I could just use:
sum (boost::make_iterator_range (x, x+size));

But, these don't compile:
 sum (boost::make_iterator_range<double const*> (x, x+size));
 sum (boost::make_iterator_range<double *> (x, x+size));

I'm stumped.  

The reason I need this, is I will need the type of range returned by 
boost::make_iterator_range (double*, double*).  Apparantly, it's not 
boost::iterator_range<double*>.