Hi all. Trying to get from

”a b (c d)”

[:a :b [:c :d]]

(->> (clojure.string/split “a b (c d)” #” “) (map keyword))

could try clojure.walk/keywordize-keys

actually nevermind, that's not a map

(map keyword [”a” “b” “c” “d”])

But it’s the parsing of string such that bracketed terms are returned as (sub) vectors of results that stumps me.

Look at instaparse as a relatively easy way to go from strings to data structures. Assuming you know the grammar of the string.

e.g.

“a (b c)" -> [a [b c]]

Yes my grammar actually. Thanks will look it up.

@seancorfield thanks

@seancorfield Not light reading but I’m pretty sure this will do it. Thanks again.

@gamecubate do you want nested parens to give you nested lists? e.g. a (b (c d))

Yep.

Actually, want to parse a string for nested parens, turning it into nested sequence

So, yes.

(def my-string “a b (c d)”)

Wanted:

[:a :b [:c :d]]

'(:a :b (:c :d))

@gamecubate Interesting little problem. My attempt looks like this:

(def my-string "a b (c d)")

((fn to-keywords [a] (if (coll? a) (map to-keywords a) (keyword a)))
       (read-string (str "[" my-string "]")))

I had to surround the string with [ and ] or some other thing to make it a data structure, and then the reader works okay.

(:a :b (:c :d))

FYI, read-string isn’t safe to use on arbitrary input since it can execute code. Consider clojure.edn/read-string instead.