Re: dynamically create cmdspec for clojure.contrib.command-line
Thanks for your tips, Ken and Meikel. Both of them were helpful, and helped me resolve my problem. First I tried: user=> (defmacro my-with-cl [spec] `(with-command-line args "desc" ~spec (prn foo))) This almost works: user=> (macroexpand-1 '(my-with-cl [[foo "something about foo" nil] remaining])) (clojure.contrib.command-line/with-command-line user/args "desc" [[foo "something about foo" nil] remaining] (clojure.core/prn user/foo)) But breaks: user=> (my-with-cl [[foo "something about foo" nil] remaining]) java.lang.Exception: No such var: user/foo (NO_SOURCE_FILE:88) This makes sense, as the backtick quote in my defmacro qualified foo under ns user. But I really need foo to be unqualified, so it refers to the foo defined by with-command-line. This variation worked: (defmacro my-with-cl [spec] `(with-command-line args "desc" ~spec (prn ~'foo))) Open to suggestions if there's a better way to do this. Thanks, Marc On Mon, Jun 27, 2011 at 4:05 AM, Meikel Brandmeyer wrote: > Hi, > > Am Sonntag, 26. Juni 2011 17:22:14 UTC+2 schrieb mlimotte: > > > user> (my-with-cl '[[foo "something about foo" nil]]) >> ; Evaluation aborted. >> Exception: Unsupported binding form: something about foo >> > > Leave out the ' in front of the vector. with-command-line quotes it for > you. Adding the quote makes it see (quote [[...]]) instead of [[...]]. > > Sincerely > Meikel > > > -- > 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 > -- 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
Aw: dynamically create cmdspec for clojure.contrib.command-line
Hi, Am Sonntag, 26. Juni 2011 17:22:14 UTC+2 schrieb mlimotte: user> (my-with-cl '[[foo "something about foo" nil]]) > ; Evaluation aborted. > Exception: Unsupported binding form: something about foo > Leave out the ' in front of the vector. with-command-line quotes it for you. Adding the quote makes it see (quote [[...]]) instead of [[...]]. Sincerely Meikel -- 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
Re: dynamically create cmdspec for clojure.contrib.command-line
On Sun, Jun 26, 2011 at 11:22 AM, Marc Limotte wrote: > And (macroexpand (my-with-cl ...)) throws the same exception. Macroexpand's a normal function, not a macro, so you need to quote its argument. -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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
dynamically create cmdspec for clojure.contrib.command-line
Hi. I'm trying to understand why the following macro doesn't work. This is a trivial example, but ultimately I want to create a macro that will let me dynamically create the cmdspec for clojure.contrib.command-line/with-command-line. I haven't written many macros, so my general understanding may be off. user> (use 'clojure.contrib.command-line) user> (def args ["--foo" "2"]) user> (defmacro my-with-cl [spec] `(with-command-line args "desc" ~spec (prn foo))) user> (my-with-cl '[[foo "something about foo" nil]]) ; Evaluation aborted. Exception: Unsupported binding form: something about foo I would expect this to be expanded to (with-command-line args "desc" [[foo "a" "b"]] (prn foo)) Which runs ok, directly in the repl: user> (with-command-line args "desc" [[foo "a" "b"]] (prn foo)) "2" nil And (macroexpand (my-with-cl ...)) throws the same exception. How can I accomplish this, and why does my solution not work? Thanks for any help. Marc -- 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
