Slava Pestov wrote:
> I don't like the ! suffix because it overlaps with comments. What
> about past tense to denote mutation?
Heh, it's funny that you bring up past tense. In the 'newfx' vocabulary I use
it to denote word variants with a 'mutate and drop' effect. So for example:
suffix ( seq elt -- seq )
suffix! ( seq elt -- seq )
suffixed! ( seq elt -- )
If a different effect order turns out to come up often enough, I'll have those
defined as well:
: suffix-on ( elt seq -- seq ) swap suffix ;
: suffix-on! ( elt seq -- seq ) tuck sequences:push ;
: suffixed-on! ( elt seq -- ) sequences:push ;
I use these conventions consistently throughout 'newfx'.
The idea taken from natural languages is that of a "root word". In the above
case it's 'suffix'. With conventions such as these, you can teach a Factor
student about a certain "root word" and they can infer the existence of (and
guess the name of) the variants. Or, when they're reading code, if they see a
word based on a root they know, they'll understand what's going on.
Another example of a word set based on a single root is 'pluck' which is the
name I use for 'remove-nth':
: pluck ( seq i -- seq ) cut-slice rest-slice append ;
: pluck-from ( i seq -- seq ) swap pluck ;
: pluck! ( seq i -- seq ) over delete-nth ;
: pluck-from! ( i seq -- seq ) tuck delete-nth ;
: plucked! ( seq i -- ) swap delete-nth ;
: plucked-from! ( i seq -- ) delete-nth ;
The only two which are essential are: 'pluck' and 'pluck!'. All the others are
stack effect variants.
Ed
-------------------------------------------------------------------------
This SF.Net email is sponsored by the Moblin Your Move Developer's challenge
Build the coolest Linux based applications with Moblin SDK & win great prizes
Grand prize is a trip for two to an Open Source event anywhere in the world
http://moblin-contest.org/redirect.php?banner_id=100&url=/
_______________________________________________
Factor-talk mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/factor-talk
