You need to know something... it's a dialect of LISP, the only limitation is you.
On Thursday, February 14, 2013 5:08:57 PM UTC-5, AtKaaZ wrote: > > Thank you! I didn't know you could do .newInstance > > oh that's a nice trick with eval and list 'new > > So it's not impossible after all, thanks Aaron! > Here's what I got from what you said: > => *(defmacro mew [cls & restt] > `(eval (list 'new ~cls ~@restt)) > )* > #'runtime.q/mew > => *(let [a java.lang.RuntimeException] > (mew a) > )* > #<RuntimeException java.lang.RuntimeException> > > it makes sense now, using eval at runtime not at compile time as I was > trying > > and also the newInstance variant: > => *(defmacro mew [cls & restt] > `(.newInstance ~cls ~@restt) > )* > #'runtime.q/mew > => *(let [a java.lang.RuntimeException] > (mew a) > )* > #<RuntimeException java.lang.RuntimeException> > > > Really, thank you Aaron, > > > On Thu, Feb 14, 2013 at 11:02 PM, Aaron Cohen > <aa...@assonance.org<javascript:> > > wrote: > >> Yes, since this is runtime you should use reflection. >> >> (let [a java.lang.RuntimeException] >> (.newInstance a)) >> >> Alternatively, you can use eval: >> >> (let [a java.lang.RuntimeException] >> (eval (list 'new a))) >> >> >> On Thu, Feb 14, 2013 at 4:53 PM, AtKaaZ <atk...@gmail.com >> <javascript:>>wrote: >> >>> I figure since new is expecting a class at compiletime, we can never >>> pass it a class that we evaluate at runtime(those locals), ergo => >>> impossible to macro around "new" like that >>> >>> like this => impossible: >>> *(let [a java.lang.RuntimeException] >>> (macro-that-eventually-calls-new a))* >>> >>> maybe someone could suggest another way? clojure.reflect ? >>> >>> >>> >>> On Thu, Feb 14, 2013 at 10:40 PM, AtKaaZ <atk...@gmail.com <javascript:> >>> > wrote: >>> >>>> thanks for the reply, >>>> >>>> => *(defmacro mew [cls & args] >>>> `(new ~cls ~@args))* >>>> #'runtime.q/mew >>>> =>* (let [a java.lang.RuntimeException] >>>> (mew a) >>>> )* >>>> >>>> CompilerException java.lang.IllegalArgumentException: Unable to resolve >>>> classname: a, compiling:(NO_SOURCE_PATH:2:3) >>>> >>>> that would be the equivalent macro of what *new* is doing >>>> it's like >>>> *(new a)* >>>> CompilerException java.lang.IllegalArgumentException: Unable to resolve >>>> classname: a, compiling:(NO_SOURCE_PATH:2:3) >>>> >>>> >>>> This is the goal: >>>> >>>> The goal is to can write this form: >>>> => *(let [a java.lang.RuntimeException] >>>> (new a))* >>>> >>>> but I think it's impossible, at least by using "new" it is >>>> >>>> >>>> On Thu, Feb 14, 2013 at 10:34 PM, Andy Fingerhut >>>> <andy.fi...@gmail.com<javascript:> >>>> > wrote: >>>> >>>>> >>>>> On Feb 14, 2013, at 1:27 PM, AtKaaZ wrote: >>>>> >>>>> The goal is to can write this form: >>>>> => *(let [a java.lang.RuntimeException] >>>>> (new a) >>>>> )* >>>>> CompilerException java.lang.IllegalArgumentException: Unable to >>>>> resolve classname: a, compiling:(NO_SOURCE_PATH:2:3) >>>>> >>>>> attempt with macro: >>>>> =>* (defmacro mew [cls & restt] >>>>> `(new ~(eval cls) ~@restt) >>>>> )* >>>>> #'runtime.q/mew >>>>> >>>>> >>>>> This is probably your closest attempt. Try this variation on the >>>>> above: >>>>> >>>>> (defmacro mew [cls & args] >>>>> `(new ~cls ~@args)) >>>>> >>>>> user=> (macroexpand-1 '(mew java.lang.RuntimeException)) >>>>> (new java.lang.RuntimeException) >>>>> >>>>> Andy >>>>> >>>>> -- >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Clojure" group. >>>>> To post to this group, send email to clo...@googlegroups.com<javascript:> >>>>> Note that posts from new members are moderated - please be patient >>>>> with your first post. >>>>> To unsubscribe from this group, send email to >>>>> clojure+u...@googlegroups.com <javascript:> >>>>> 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 unsubscribe from this group and stop receiving emails from it, send >>>>> an email to clojure+u...@googlegroups.com <javascript:>. >>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>> >>>>> >>>>> >>>> >>>> >>>> >>>> -- >>>> Please correct me if I'm wrong or incomplete, >>>> even if you think I'll subconsciously hate it. >>>> >>>> >>> >>> >>> -- >>> Please correct me if I'm wrong or incomplete, >>> even if you think I'll subconsciously hate it. >>> >>> -- >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Clojure" group. >>> To post to this group, send email to clo...@googlegroups.com<javascript:> >>> Note that posts from new members are moderated - please be patient with >>> your first post. >>> To unsubscribe from this group, send email to >>> clojure+u...@googlegroups.com <javascript:> >>> 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 unsubscribe from this group and stop receiving emails from it, send >>> an email to clojure+u...@googlegroups.com <javascript:>. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >>> >>> >> >> -- >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clo...@googlegroups.com<javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> 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 unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+u...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > > > -- > Please correct me if I'm wrong or incomplete, > even if you think I'll subconsciously hate it. > > -- -- 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 unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
