Tuple slots can be declared immutable with the read-only word:
TUPLE: foo { a read-only } ;
I suppose if you wanted the entire tuple, you could do something like:
SYNTAX: IMMUTABLE-TUPLE: parse-tuple-definition
[ dup array? [ read-only suffix ] [ read-only 2array ] if ] map
define-tuple-class ;
Arrays and quotations are both forms of immutable sequences.
Michael Kohout wrote:
> Hi All-
>
> While I've long been interested in Factor(I was at the TC Lisp meeting last
> year), with this new release I've put a bit more effort into learning how to
> use it effectively. Anyways, most of the tools that I'm using
> (Scala/F#/OCaml/and Common Lisp) have immutable collections and immutable
> tuple types either built in or available as a library.
>
> Does Factor have any support for immutable types? If not, are there plans
> to provide one?
>
> thanks, and nice work with the new stable release!
> Mike Kohout
>
>
>
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