Re: [Boost-users] problems with boot::multi_array and standard algorithms

From: Ronald Garcia (garcia_at_[hidden])
Date: 2005-02-02 13:11:01

Hi Donald,

On Feb 1, 2005, at 4:50 PM, Donald Johnson wrote:

> I cant get boost::multi_array to wrk with STL algorithms. In particular
>
> boost::multi_array<int,2> test_array( boost::extents[10][10] );
> std::fill(test_array.begin(),test_array.end(),1);
>
> gives me the following compile errors.
>
...
> Do the provided iterators not work for stl algorithms?
>
>

Yes they do, but not in the manner that you think they do :).  In the  
code above, you are creating a 2 dimensional array.  Calling begin() on  
your array results in an iterator over the /one-dimensional arrays/  
contained therein.  Your code is  trying to assign scalar values to  
one-dimensional arrays, hence the type error.  You can get the effect  
that you are going for as follows.

std:: 
fill(test_array.data(),test_array.data()+test_array.num_elements(),1);

Hope this helps!

ron