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janet/libs/repl.gst
2017-05-11 17:08:29 -04:00

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(namespace-set! "gst.repl")
"Read a line"
(export! "readline" (fn []
(: b (buffer))
(read stdin 1 b)
(while (not (= (get "\n" 0) (get b (- (length b) 1))))
(read stdin 1 b)
)
(string b)
))
"Create a parser"
(export! "p" (parser))
"Run a simple repl."
(while 1
(write stdout ">> ")
(: t (thread (fn [line]
(: ret 1)
(while line
(: line (parse-charseq p line))
(if (parse-hasvalue p)
(: ret ((compile (parse-consume p))))))
ret)))
(: res (tran t (readline)))
(if (= (status t) "dead") (print (debugp res)) (print "Error: " (debugp res))))