Eh, I'm more interested in the int/long/double protocol, and was asking about the string one as a matter of completeness.
NumberClass/parseNumber doesn't take a broad range of inputs, yadda yadda yadda... On Oct 25, 5:06 pm, Ben Smith-Mannschott <bsmith.o...@gmail.com> wrote: > On Tue, Oct 25, 2011 at 14:45, Sean Devlin <francoisdev...@gmail.com> wrote: > > I was wondering if there was a common protocol to get a string > > representation of an object yet. Also, are there common protocols for > > ints, doubles, chars, etc? Having just spent a lot of time writing > > Python, having an int function that worked on both Strings and Ints > > was great. I'd love to be able to use a protocol for this. > > What do you need the string for? Just for presentation (like __str__), > or are you hoping to be able to parse it back in again (like > __repr__)? > > (pr-str x) will produce a string representation of x which you can > convert back to Clojure data using (read-string s) provided x was > composed only of things that are representable as Clojure literals > (lists, vectors, maps, sets, keywords, strings, symbols, numbers, > chars). > > The behavior of pr and friends is not defined in a protocol, as such, > but rather by the multimethods print-method and print-dup. I suppose > one could add behavior for ones own types, but this would be of > limited utility since read and friends won't know how to read these > representations back in. > > (str x) produces a string for presentation. This is not necessarily > something that can be read back in. > > This is not defined by a protocol, as such, but rather by overriding > the toString(), which all Java classes provide. > > // Ben -- 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
