Now that I can parse ZOI, it was necessary to figure out what the
interactions with it and SI and SA would be. Along the way, I added
some features to the interaction between SI and SA. This is what I've
currently got on my parser page, and I'd very much like people's
opinions.
In particular, if there is a direct contradiction with grammar.300 that is
*not* obviously based on YACC limitations, or anything that seems strongly
counter-intuitive, please let me know.
The main page for my parser is
http://www.digitalkingdom.org/~rlpowell/hobbies/lojban/grammar/
* Groups of "si" and everything up to a "sa" are both erased at the
beginning
of a string. This may or may not be justifiable according to grammer.300;
no-one's really sure. This means that sentences like "si si si" and "sa" are
legal, as well as sentences like "le broda sa .i mi cusku".
* SA and SI now interact in a more obvious fashion. For example, "le broda
brode brodi .y. sa le si la broda brode brodi" is equivalent to "la broda
brode
brodi". Just using "sa" would not work because "le" and "lo" are in different
selma'o.
* Interactions between ZOI, SI, and SA are much richer. The goal is to
achieve something more like what a user would 'expect', given the basic
definitions of those words. Details:
+ The first SI after the close of a ZOI clause erases the closing
delimiter, allowing one to add to the protected text. "zoi gy weeble gy si bob
gy" is equivalent to "zoi gy weeble bob gy".
+ Two consecutive SI after the close of a ZOI erases the non-Lojban
text
itself; while it would theoretcially be possible to have consecutive SI after
the close of a ZOI erase individual words inside the ZOI protected text, this
is a bad idea because (for example) breaking up a bird call into words makes
very little sense.
So, for example, "zoi gy da da da gy si si de gy" is equivalent
to "zoi
gy de gy".
+ The interaction of these two features leads to a somewhat
strange, but
very minor, side effect: It is impossible to add to the protected text
inside a
zoi clause (i.e. using a single SI after the closing delimiter) any text that
starts with "si" (unless it then goes on to be something that looks like a
Lojban brivla or cmene), because it will be interpreted as two SI, causing
erasure of the entire protected text.
+ Three consecutive SI after the close of a ZOI erases everything
but the
ZOI itself, so that, for example, "zoi gy da da da gy si si si dy weeble
dy" is
equivalent to "zoi dy weeble dy".
+ Four consecutive SI after the close of a ZOI erases the entire ZOI
clause, including the ZOI.
+ Because of the SA and SI interaction enhancements, the fast way to
delete and accidental ZOI is to close the delimiter and say "sa zoi si", and
then continue on. For example, "broda zoi gy da da da da gy sa zoi si da" is
equivalent to "broda da".
-Robin