Again, those are already given bindings. Think of it as if somewhere there's (binding [*unchecked-math* false] (loop [] (do-repl-stuff!) (recur))).
As for "intended for uses other than working at the REPL", they still tend to be compile/macroexpansion-time uses, and presumably dynamic bindings exist in the threads that compilation and macroexpansion take place on. On Wed, Mar 13, 2013 at 5:46 PM, Mark Engelberg <mark.engelb...@gmail.com>wrote: > On Wed, Mar 13, 2013 at 2:06 PM, Marko Topolnik > <marko.topol...@gmail.com>wrote: > > >> As far as I understand it, *set!* modifies the *thread-local* binding, >> just like the *binding* macro, but doesn't delimit a definite scope of >> validity for the binding. You can *set!* any dynamic var with the same >> semantics. >> > > You can't just set! any dynamic var, you can only set! vars that are both > dynamic *and* have been bound again with the binding construct. > > => (def ^:dynamic a 2) > #'user/a > => (set! a 3) > IllegalStateException Can't change/establish root binding of: a with set > clojure.lang.Var.set (Var.java:233) > => (binding [a 1] (set! a 3)) > 3 > > > This is why I'm puzzled about how things like (set! *unchecked-math* true) > are handled. Clearly, in this special case you can use set! without first > calling binding. > > -- > -- > 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.
