This. Macros, unless you do some gymnastics, always generate fully-
qualified names, which is a Good Thing. You can't bind qnames, in let
or function arguments or anywhere else. But clojure provides you with
a very useful var# syntax: this creates a new symbol which is
guaranteed to be unique, and lets you refer to it by that name
throughout the macro expansion. Here's a basic example:
(defmacro square [x]
`(let [val# ~x]
(* val# val#)))
(macroexpand '(square 3))
==> (let* [val__4209__auto__ 3]
(clojure.core/* val__4209__auto__ val__4209__auto__))
On Nov 8, 7:10 am, Sunil S Nandihalli <sunil.nandiha...@gmail.com>
wrote:
> use session# instead of session .. I think that should work.. try it..
>
> On Mon, Nov 8, 2010 at 8:32 PM, Miki <miki.teb...@gmail.com> wrote:
> > Greetings,
>
> > I need some help with the 1'st macro I'm writing.
> > I have many tests in the format
>
> > (deftest user-test
> > (let [session (test-session :authorization)]
> > (dispatcher "USER bugs" session)
> > (is (= (:user @session) "bugs"))
> > (is (= (get-one session) "+OK Hello bugs\n"))))
>
> > I've tried writing
>
> > (defmacro def-dispatcher-test [test-name state command & body]
> > `(deftest ~test-name
> > (let [session (test-session ~state)]
> > (dispatcher ~command session)
> > ~...@body)))
>
> > (def-dispatcher-test user-test :authorization "USER bugs"
> > (is (= (:user @session) "bugs"))
> > (is (= (get-one session) "+OK Hello bugs\n")))
>
> > But I get the following error;
>
> > Caused by: java.lang.Exception: Can't let qualified name: pop32imap-
> > test/session
>
> > I probably need to add some magic to the session expansion, but can't
> > figure out what.
>
> > Thanks,
> > --
> > Miki
>
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