Hello,
I have some questions about how to use the prn functions.
>From the documentation of the prn function:
"[...] By default, pr and prn print in a way that objects can be read
by the reader [...]"
In this case, why does the prn-str function does not quote sequences?
For instance (pr-str '(+ 1 2)) returns "(+ 1 2)", which can not be
read back since (eval (read-string (pr-str '(+ 1 2)))) returns 3!
There is the *print-dup* function but it does not produce a string
readable by an (advanced) user:
(binding [*print-dup* true]
(pr-str '(+ 1 2)))
returns "^#=(clojure.lang.PersistentArrayMap/create {:line 1}) (+ 1
2)"
where I just would like to display to the user "'(+ 1 2)"
So how can one print and read back quoted s-expressions so that a user
can modify them?
I have implemented a pr-str-data function:
(defn- pr-str-data [data]
(if (seq? data)
(str "'" (pr-str data))
(pr-str data)))
but there should be a better way.
Thanks in advance for your help.
--
You received this message because you are subscribed to the Google
Groups "Clojure" group.
To post to this group, send email to clojure@googlegroups.com
Note that posts from new members are moderated - please be patient with your
first post.
To unsubscribe from this group, send email to
clojure+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/clojure?hl=en
