Norbert Nemec wrote:
Hi there,
in implementing multi-dimensional arrays, the current way of overloading
the slicing operator does not scale up.
Currently, there is opIndex working for an arbitrary number of indices,
but opSlice works only for one dimension. Ultimately, it should be
possible to allow slicing for more than one dimension, and mixing it
with indexing for e.g.:
A[4,7..8,7,2..5]
So far, no clean solution for overloading this has been suggested.
A solution was suggested while you were away.
You don't need a new opRange operator, a simple tuple struct like:
struct Slice(T) { T from; T to; }
in std.object is enough.
Note that:
A[4, Slice(7,8), 7, Slice(2,5)]
will work with the existing compiler. So it's just a tiny syntax sugar
issue.
And another simple possibility is to turn 7..8 into int[2][7,8].
However, Andrei argued that slicing of multidimensional arrays is so
rarely used that syntax sugar is not necessary. Thus, it's not in D2.
