Re: Question about Array::index with resizing

[John W. Eaton]

On 05/22/2013 10:06 PM, Michael Goffioul wrote:
> Could anybody enlighten me about the implementation of
>
> Array<T>
> Array<T>::index (const Array<idx_vector>& ia,
>                   bool resize_ok, const T& rfv) const
>
> I'm trying to use it in the classdef branch, assuming this function
> would resize the array is the given index is out of bound. In my case,
> "ia" contains only scalars, so the variable "all_scalars" ends up being
> true. But then the code does:
>
>            if (all_scalars)
>              return Array<T> (dim_vector (1, 1), rfv);
>
> In other words, the code always return an array with a single element
> being the resize_fill_value. No resizing or array indexing actually
> takes place.
>
> Is it intentional? Unimplemented? Or am I missing something?

I think it was intentional but probably also obsolete.

The index operation is const, so I'm not sure what it means to resize. 
Obviously, indexing can result in an array that is a different size than 
the array that is indexed.

I can't see where these functions are actually used with resize_ok = 
true.  If that's actually the case, then I'd be happy to remove these 
arguments.

jwe