BG, The macro doesn't seem to do the trick. The function X is interned in the target namespace, but:
user=> (def image (eval-in "(X 400 400)" "clevolution.version.version0-1-1")) CompilerException java.lang.RuntimeException: Unable to resolve symbol: X in this context, compiling:(NO_SOURCE_PATH:1) On Mon, Dec 17, 2012 at 11:53 PM, Alan Shaw <noden...@gmail.com> wrote: > Oh yes, the something.something is fixed so I can just prepend it, thanks. > (Hadn't noticed your macro takes the ns as a string!) > > -A > > > > On Mon, Dec 17, 2012 at 11:47 PM, Baishampayan Ghose <b.gh...@gmail.com>wrote: > >> Alan, >> >> What you're asking for is to derive the ns "clojure.core" given only >> "core". Not sure if that's possible. >> >> The namespace constitutes the whole dotted structure and not just the >> last component, I am afraid. >> >> If the actual ns is something.something.version-0-1-1, then you need >> the string "something.something.version-0-1-1" and not just >> "version-0-1-1" [unless of course you have some other way of deriving >> it from info that's embedded in _your_ code or structure thereof]. >> >> >> -BG >> >> On Tue, Dec 18, 2012 at 1:10 PM, Alan Shaw <noden...@gmail.com> wrote: >> > Thanks BG, I'm trying that. >> > But I don't think it addresses how to get from the string >> "version-0-1-1" to >> > the namespace something.something.version-0-1-1. How can I do that? >> > >> > -A >> > >> > >> > >> > On Mon, Dec 17, 2012 at 11:26 PM, Baishampayan Ghose <b.gh...@gmail.com >> > >> > wrote: >> >> >> >> Alan, >> >> >> >> Something like this might work for you - >> >> >> >> (defmacro eval-in >> >> "Eval a Clojure form in a different namespace and switch back to >> >> current namespace. >> >> >> >> Args: >> >> code - Clojure form as string >> >> ns - Target namespace as string" >> >> [code ns] >> >> `(do >> >> (in-ns '~(symbol ns)) >> >> (let [ret# (eval '~(read-string code))] >> >> (in-ns '~(ns-name *ns*)) >> >> ret#))) >> >> >> >> Warning - I haven't really tested this code. >> >> >> >> -BG >> >> >> >> On Tue, Dec 18, 2012 at 12:37 PM, Alan Shaw <noden...@gmail.com> >> wrote: >> >> > Thanks, Las! >> >> > >> >> > Ok say I have a file in which there is string such as >> >> > >> >> > "(- (atan (bw-noise 902 2 0.7604615575402431 400 400)) >> >> > (read-image-from-file >> >> > \"images/Dawn_on_Callipygea.png\"))" >> >> > >> >> > and another >> >> > >> >> > "version-0-0-1" >> >> > >> >> > and I have a namespace version-0-0-1 into which functions named atan >> >> > etc. >> >> > are all :referred. I want to evaluate the expression in that >> particular >> >> > context, and not remain there when I'm done. >> >> > >> >> > -A >> >> > >> >> > >> >> > >> >> > On Mon, Dec 17, 2012 at 11:00 PM, László Török <ltoro...@gmail.com> >> >> > wrote: >> >> >> >> >> >> ah, sorry, it's a bit early for me >> >> >> >> >> >> (in-ns (ns-name user-ns)) >> >> >> >> >> >> if you could post a simple example for the second part of your >> question >> >> >> I >> >> >> maybe able to help. >> >> >> >> >> >> Las >> >> >> >> >> >> Alan Shaw 2012. december 18., kedd napon a következőt írta: >> >> >> >> >> >>> Ah no, that puts me in a new user-ns namespace! Not what I wanted! >> >> >>> >> >> >>> >> >> >>> On Mon, Dec 17, 2012 at 10:51 PM, László Török <ltoro...@gmail.com >> > >> >> >>> wrote: >> >> >>>> >> >> >>>> Try (in-ns 'user-ns) >> >> >>>> >> >> >>>> Las >> >> >>>> >> >> >>>> On Dec 18, 2012 7:50 AM, "Alan Shaw" <noden...@gmail.com> wrote: >> >> >>>>> >> >> >>>>> user=> *ns* >> >> >>>>> #<Namespace user> >> >> >>>>> user=> (def user-ns *ns*) >> >> >>>>> #'user/user-ns >> >> >>>>> user=> user-ns >> >> >>>>> #<Namespace user> >> >> >>>>> user=> (in-ns user-ns) >> >> >>>>> ClassCastException clojure.lang.Namespace cannot be cast to >> >> >>>>> clojure.lang.Symbol clojure.lang.RT$1.invoke (RT.java:226) >> >> >>>>> >> >> >>>>> It appears I'm not understanding how namespaces are represented. >> >> >>>>> >> >> >>>>> Also, is it just wrong of me to want to remember a namespace I >> was >> >> >>>>> working in and try to go back to it later? >> >> >>>>> >> >> >>>>> The slightly larger context is: I'm saving an s-expression with >> >> >>>>> unqualified names in it into a file as a string. Also saving a >> >> >>>>> string >> >> >>>>> indicating the name of the environment in which that string >> should >> >> >>>>> be (read >> >> >>>>> and) eval'ed so that the names will resolve to the appropriate >> >> >>>>> functions. >> >> >>>>> Advice on managing this would be appreciated. >> >> >>>>> >> >> >>>>> -Alan Shaw >> >> >>>>> >> >> >>>>> -- >> >> >>>>> 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 >> >> >>> >> >> >>> >> >> >>> -- >> >> >>> 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 >> >> >> >> >> >> >> >> >> >> >> >> -- >> >> >> László Török >> >> >> >> >> >> -- >> >> >> 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 >> >> >> >> >> >> >> >> -- >> >> Baishampayan Ghose >> >> b.ghose at gmail.com >> >> >> >> -- >> >> 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 >> >> >> >> -- >> Baishampayan Ghose >> b.ghose at gmail.com >> >> -- >> 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
