Hi,
Clojure doesn't read files. It reads, compiles and executes a stream of
toplevel expressions. Hence the file is compilable, but not readable.
If you do not want to execute the forms contained in a file, you have to avoid
any dynamic feature. In particular aliased keywords with :: since those can
only be handled after the require is executed.
Sincerely
Meikel
-----Ursprüngliche Nachricht-----
Von: Jonas <jonas.enl...@gmail.com>
An: clojure@googlegroups.com
Gesendet: So, 11 Mrz 2012, 07:26:28 MEZ
Betreff: Compilable clojure program, but unreadable?
Hi
If I have the following short Clojure program:
;; unread.clj
(require '[clojure.string :as s])
(prn ::s/kwd)
The second form can't be read by the clojure reader:
user=> (def reader (java.io.PushbackReader. (clojure.java.io/reader
"unread.clj")))
#'user/reader
user=> (read reader)
(require (quote [clojure.string :as s]))
user=> (read reader)
java.lang.Exception: Invalid token: ::s/kwd (NO_SOURCE_FILE:0)
But if I load the file, prior to reading it, it works fine:
user=> (load-file "unread.clj")
:clojure.string/kwd
nil
user=> (def reader (java.io.PushbackReader. (clojure.java.io/reader
"unread.clj")))
#'user/reader
user=> (read reader)
(require (quote [clojure.string :as s]))
user=> (read reader)
(prn :clojure.string/kwd)
Can anyone think of a way to read the file without loading/compiling it?
Thanks,
Jonas
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