On Wednesday, 19 December 2012 at 13:28:24 UTC, Nekroze wrote:
On Wednesday, 19 December 2012 at 12:27:32 UTC, Rafael wrote:
1) It is possible to implement multiindex access using
opIndex* methods, moreover this is the simplest way to
multiindex access realization. So, we have [i, j, k] notation.
Next step after it - slices implementation and it looks
logical to save the same notation for it: [i1..i2, j1..j2, k].
But it impossible, if I understand correctly.
2) On the other hand. Syntax via [i][j] leads to some
overhead: first index access [i] must return some light
accessor object (like range (or iterator)) which supports the
index access operation. But using this approach it is possible
to implement multidimensional slices. And this means, that
opIndex* methods with multiindex are not needed.
Well if you are looking at operator overloading you can
overload opSlice as described here
http://dlang.org/operatoroverloading.html#Slice however i am
not sure if you can defined multiple slices delimited by commas
in the same [] block but it is worth a try.
...and we return to my initial question :)
The answer is: no, D is not support multidimension slices.
Possible way to solve it is to define some auxiliary structure
Slice, and use multiindex by following way:
S [ Slice(0, $), 2] = A [ Slice(0, $), 2];
