Am 31.12.2010 03:29, schrieb Alex Baranosky:
I've been playing with making a macro to encapsulate Stuart's post, like
this:

(defmacro defrecord-ifn [name & args]
   `(defrecord ~name ~...@args
     clojure.lang.IFn
     (invoke [this key] (get this key))))

(defrecord-ifn Foo [a b c])

(def foo (Foo. "A" "B" "C"))

(prn (map foo [:a :c])) => ("A", "C")

I get the error:

"No such var: user/this".  I guess this is because it is expanding
'this' to 'user/this'.  What is the proper way to get a macro like this
to expand properly?

Others have already pointed to “this#”.
I just would like to add that you can as well use “~'this” in some
cases, where your macros generate defns. The advantage is that some
editors (like emacs) will show you the parameter vector and that would
show a useful name and not “this_auto_foobarbaz123456”.

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