Re: [Boost-users] multi_array index_gen or extent_gen store for reuse

From: Ronald Garcia (garcia_at_[hidden])
Date: 2006-05-24 14:26:54

Hi Levent,

In this case, '???' should be:

Arr::index_gen::gen_type<3,3>::type;

gen_type is a type generator for specifying an the result of applying  
operator[] to an index_gen.  It takes two unsigned integral  
arguments.  The first specifies the number of dimensions of the  
original array (to which operator[] is being applied).  The second  
specifies the number of dimensions in the resulting view.

Hope this helps,
ron

On May 6, 2006, at 6:33 PM, Levent wrote:

> Is it possible to store tuples of index or range values (or  
> generators)
> for later reuse? Consider the following:
>
> typedef boost::multi_array<int,3> Arr;
> typedef Arr::index_range Ir;
> typedef ??? indices;
> Arr a(boost::extents[3][4][5]);
> Arr b(a);
> indices somerange = Arr::index_gen[Ir()][Ir(1,5)][Ir()<2];
> b[somerange] = a[somerange];
> // and so on
>
> What should `???' be?
>
> thanks
> - Levent
>
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