It is used in test.generative code by Stuart Halloway, which is probably about as supported as you can get:
https://github.com/clojure/test.generative/blob/master/src/main/clojure/clojure/test/generative/runner.clj#L55 Andy On Tue, Sep 17, 2013 at 5:16 PM, Andy Fingerhut <andy.finger...@gmail.com>wrote: > Casper, in the example source file you pointed at in the core.logic test > suite, the only times it uses the ::<namespace>/<symbol> syntax is where > <namespace> is an alias for a namespace that has been created by an earlier > :require statement. > > In my limited testing in Clojure 1.5.1, that syntax throws an exception if > <namespace> is an existing namespace, or an alias for one, but throws an > exception if it is not an existing namespace. > > So in a plain vanilla Clojure 1.5.1 REPL, this works because there is a > namespace clojure.set: > > user=> (def s1 #{::clojure.set/foo}) > #'user/s1 > user=> s1 > #{:clojure.set/foo} > > but this doesn't work, because there is no namespace clojure.foo: > > user=> (def s2 #{::clojure.foo/bar}) > RuntimeException Invalid token: ::clojure.foo/bar > clojure.lang.Util.runtimeException (Util.java:219) > RuntimeException Unmatched delimiter: } > clojure.lang.Util.runtimeException (Util.java:219) > RuntimeException Unmatched delimiter: ) > clojure.lang.Util.runtimeException (Util.java:219) > > I do not know if David Nolen is using a supported feature here or an > accident of the Clojure 1.5.1 implementation. > > Andy > > > > On Tue, Sep 17, 2013 at 5:01 PM, Dave Ray <dave...@gmail.com> wrote: > >> A namespace-qualified keyword has a single colon: >> >> :my-namespace/something >> >> The double-colon is only shorthand for the current namespace: >> >> (in-ns 'my-namespace) >> ::something -> :my-namespace/something >> >> Dave >> >> >> >> On Tue, Sep 17, 2013 at 4:58 PM, Casper Clausen <casp...@gmail.com>wrote: >> >>> The double colon keyword creates a namespaced keyword and is perfectly >>> valid syntax. It's just not used that often :) >>> >>> By default a keyword like ::test resolves to the current namespace like >>> ::current-ns/test, but you can also provide another ns which causes the >>> problem when reading. >>> >>> Have at look at >>> https://github.com/clojure/core.logic/blob/0d1d545f0a81c585c7449aecb5d661120f3da568/src/main/clojure/clojure/core/logic/fd.cljfor >>> instance. >>> >>> On Wednesday, September 18, 2013 1:05:01 AM UTC+2, daveray wrote: >>>> >>>> Hey, >>>> >>>> You have too many colons: >>>> >>>> user=> (read-string ":l/test") >>>> :l/test >>>> >>>> >>>> Dave >>>> >>>> >>>> >>>> On Tue, Sep 17, 2013 at 4:03 PM, Casper Clausen <cas...@gmail.com>wrote: >>>> >>>>> I am reading a bunch of clojure files using the build-in reader (or >>>>> tools.reader, it has the same problem) and I am running into a problem >>>>> regarding namespaced keywords (is that the right term?) such as ::l/test. >>>>> >>>>> => (read-string "::l/test") >>>>> RuntimeException Invalid token: ::l/test >>>>> clojure.lang.Util.**runtimeException >>>>> (Util.java:219) >>>>> >>>>> It seems that the reader requires the namespace alias 'l' to exist. >>>>> This is a shame because in most (all?) other respects the reader is able >>>>> to >>>>> just read in the symbols even if their namespace is not loaded. So in >>>>> order >>>>> for me to read a file with a namespaced keyword I need to eval at least >>>>> the >>>>> ns form of the file, which then requires me to eval the ns forms of its >>>>> dependencies (and so on). My code is basically building on the excellent >>>>> codeq analyzer (https://github.com/Datomic/** >>>>> codeq/blob/master/src/datomic/**codeq/analyzers/clj.clj<https://github.com/Datomic/codeq/blob/master/src/datomic/codeq/analyzers/clj.clj>), >>>>> so I am guessing this would have the same problem when running into a >>>>> similar namespaced keyword. >>>>> >>>>> So my question is how do I best get around this? >>>>> >>>>> -- >>>>> -- >>>>> 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 >>>>> 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 >>>>> For more options, visit this group at >>>>> http://groups.google.com/**group/clojure?hl=en<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. >>>>> For more options, visit >>>>> https://groups.google.com/**groups/opt_out<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 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. >>> >> >> -- >> -- >> 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. >> > > -- -- 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.
