cljs.reader/PushbackReader

protocolremoved v1.9.854added v0.0-927Edit
Source code @ clojurescript:src/main/cljs/cljs/reader.cljs
(defprotocol PushbackReader
  (read-char [reader] "Returns the next char from the Reader,
nil if the end of stream has been reached")
  (unread [reader ch] "Push back a single character on to the stream"))