Re: The question was: why is there no GPL or BSD APL interpreter?

On Feb 24, 11:05 am, Gosi <gos...@[EMAIL PROTECTED]
> wrote:
> Arrays And References
> Jean-Jacques Glrardot
> Ecole des Mines
> 158 Cows Fauriel
> 42023 Saint-Etienne C6dex, France
> gira...@[EMAIL PROTECTED]
 fr
> Abstract
> ...

Interesting paper.  I didn't read the whole thing, although I would
like to outline my idea on how generalized arrays should work:

Essentially, any expressions that are juxtaposed and not separated by
a function or operator will be part of the same array.  This allows
not only for multi-type arrays, but also jagged ones.  Consider the
following theoretical session:

      12 'abc' (1 2)
12 'abc' (1 2)
      12 'abc' (1 2) [3]
1 2

The interpreter would evaluate (1 2) to get the array 1 2, 'abc' to
get a string, and 12 to get an integer.  It would then catenate these
three value into one array.

The inner array would essentially be considered a scalar while inside
the outer array.  Ideally, the nested arrays should work seamlessly
with all primitives:

      3 1 {rho} (1 2 3)
(1 2 3)
(1 2 3)
(1 2 3)
      1 (4 5) + 1 2
2 (6 7)

This system may have some unforeseen flaws, but I think it's the
simplest way to introduce irregular data structures.  Multi-type
arrays could give programs a similar expressive boost.