Lazy concatenation and padding utilities

[Ilya Yaroshenko via Digitalmars-d]

On Thursday, 9 March 2017 at 09:10:47 UTC, Nordlöw wrote:
> On Thursday, 9 March 2017 at 08:59:28 UTC, Ilya Yaroshenko 
> wrote:
>> Ndslice got [1] lazy multidimensional concatenation and 
>> padding utilities:
>
> Nice. Is this dependent on choosing either RC- or GC-based 
> allocation?

No, they are completely generic.

The new ndslice uses iterators under the hood. An iterator for 
manually allocated memory (with `makeSlice!T`) and GC allocated 
memory (with `slice!T`) is just a pointer type of T*.

You can use `slicedField` [1] to create ndslice on top of a 
RC-array. slicedField will create iterator on top of the rc-array 
using FieldIterator [2], and return ndslice based on the 
iterator. This is quite simple

RC arrays can be very simple: only `auto ref opIndex(size_t 
index)`  and `length` are required. `front`, `opSlice` and other 
RAR primitives are not used by FieldIterator.

[1] 
http://docs.algorithm.dlang.io/latest/mir_ndslice_slice.html#slicedField
[2] 
http://docs.algorithm.dlang.io/latest/mir_ndslice_iterator.html#FieldIterator