Hi all,
I'm using the Parsatron library to build parser combinators. I have the
following definition:
(defparser anbn []
(let->> [as (many (char \a))
bs (times (count as) (char \b))]
(always (concat as bs))))
(defparser xdny []
(let->> [ds (between (char \x) (char \y)
(many (char \d)))]
(always (concat '(\x) ds '(\y)))))
(defparser pL []
(either
(anbn)
(xdny)))
When I use this definition in REPL with some examples, I have:
user=> (run (pL) "xddy")
()
user=> (run (pL) "aabb")
(\a \a \b \b)
user=> (run (xdny) "xddy")
(\x \d \d \y)
I didn't understand why the first answer is not (\x \d \d \y). The second
and third answers are correct for me.
Can anyone help me?
Regards,
Alex
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