Ah I see. Thank you Ken. On Jan 28, 11:07 am, Ken Wesson <kwess...@gmail.com> wrote: > On Fri, Jan 28, 2011 at 12:55 PM, Benny Tsai <benny.t...@gmail.com> wrote: > > It seems that 'unchecked-add' returns a primitive (note that in the > > first version, 'recur' happily accepts the return from 'unchecked-add' > > without coercion), but when 'unchecked-add' is bound to a new name, > > the return gets boxed. > > > Is this the correct interpretation, or am I missing something? > > It's correct. Clojure's compiler inlines certain functions, including > clojure.core/unchecked-foo and, when the arity is 2, clojure.core/+ -- > but not a bare, un-qualified +, which might (or might not) at runtime > refer to clojure.core/+ or clojure.core/unchecked-add or whatever.
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