Hello all,
I've written a quick few hundred lines of Chicken Scheme that converts
BNF-esque grammars such as:
(s-expression
. (choice
(seq "(" (one-or-more s-expression) "." s-expression ")")
(seq "(" (zero-or-more s-expression) ")")
(seq "\"" string "\"")
(seq "#(" (zero-or-more s-expression) ")")
(seq "#" symbol)
(seq ":" symbol)
(seq symbol ":")
symbol
number
(seq "'" s-expression)
(seq "`" s-expression)
(seq "," s-expression)
(seq ",@" s-expression)))
(symbol
. (choice
(seq "|" (one-or-more character) "|")
(seq symbol-first-character (zero-or-more
symbol-subsequent-character))))
Into SVG syntax diagrams such as:
http://love.warhead.org.uk/~alaric/junk/sexpr.svg
It uses matchable and sxpath-lolevel (from the sxpath egg) - the latter
for turning the sxml representation of SVG into yucky XML.
If it's of use to anybody else (I wrote it so I could draw syntax
diagrams for the constructed language Lojban - see
http://love.warhead.org.uk/~alaric/junk/lojban.svg for a more stressful
workout of the layout engine), I'd like to put it in an egg, please!
ABS
--
Alaric Snell-Pym
http://www.snell-pym.org.uk/alaric/
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