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Discussed here: http://groups.google.com/group/clojure-dev/msg/74af612909dcbe56
:as-of allows library authors to specify a known subset of vars to refer from clojure (or any other library which would use :added metadata).
(ns foo (:refer-clojure :as-of "1.1")) is equivalent to (ns foo (:refer-clojure :only (link: public-documented-vars-which-already-existed-in-1.1)))
Comment made by: importer
cgrand said: (link: [file:a8SumUvcOr37SmeJe5cbLA]): requires application of #325
Converted from http://www.assembla.com/spaces/clojure/tickets/326
add-as-of-to-refer.patch - https://www.assembla.com/spaces/clojure/documents/a8SumUvcOr37SmeJe5cbLA/download/a8SumUvcOr37SmeJe5cbLA
richhickey said: Do we still need this?