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Simple pprint example.

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Answering #165.
This commit is contained in:
Joel Martin 2016-02-10 16:19:32 -06:00
parent 425233e3ad
commit 531d0798ce
1 changed files with 41 additions and 0 deletions
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(def! spaces- (fn* [indent]
(if (> indent 0)
(str " " (spaces- (- indent 1)))
"")))
(def! pp-seq- (fn* [obj indent]
(let* [xindent (+ 1 indent)]
(apply str (pp- (first obj) 0)
(map (fn* [x] (str "\n" (spaces- xindent)
(pp- x xindent)))
(rest obj))))))
(def! pp-map- (fn* [obj indent]
(let* [ks (keys obj)
kindent (+ 1 indent)
kwidth (count (seq (str (first ks))))
vindent (+ 1 (+ kwidth kindent))]
(apply str (pp- (first ks) 0)
" "
(pp- (get obj (first ks)) 0)
(map (fn* [k] (str "\n" (spaces- kindent)
(pp- k kindent)
" "
(pp- (get obj k) vindent)))
(rest (keys obj)))))))
(def! pp- (fn* [obj indent]
(cond
(list? obj) (str "(" (pp-seq- obj indent) ")")
(vector? obj) (str "[" (pp-seq- obj indent) "]")
(map? obj) (str "{" (pp-map- obj indent) "}")
:else (pr-str obj))))
(def! pprint (fn* [obj]
(println (pp- obj 0))))
(pprint '(7 8 9 "ten" [11 12 [13 14]] 15 16))
(pprint '{:abc 123 :def {:ghi 456 :jkl [789 "ten eleven twelve"]}})
(pprint '(7 8 {:abc 123 :def {:ghi 456 :jkl 789}} 9 10 [11 12 [13 14]] 15 16))