[Projects] xrm: for loops

14 Jun 2006

I would like to suggest that for-from loops be sugar for for-in
loops.

I would like to suggest the possibility to use ranges with for-in
loops, which might already be the case.

Finally, I suggest supporting Cartesian products of ranges.

Finally, I suggest that

for x from 0 to X - 1 do
  for y from 0 to Y - 1 do

could be written as

      for (x, y) in (0 .. X - 1, 0 .. Y - 1)

or something like that.  Maybe

      for x, y in 0 .. X - 1 x 0 .. Y - 1

where x is the Cartesian product?  Nah.  Make them tuples?  I.e., use
[] again?

      for x, y in [0 .. X - 1][0 .. Y - 1]

I like this, since it basically means that arrays are nothing both
variables indexed over ranges that can now be multidimensional.