[ACCEPTED]-Clojure infinite loop-clojure
while is in the core libraries.
(while true (calc))
This expands to 1 a simple recur.
(defmacro while
"Repeatedly executes body while test expression is true. Presumes
some side-effect will cause test to become false/nil. Returns nil"
[test & body]
`(loop []
(when ~test
~@body
(recur))))
Using the while macro that Brian provides in his answer 5 it is a simple task to write a forever macro that 4 does nothing but drops the boolean test 3 from while:
(defmacro forever [& body] `(while true ~@body)) user=> (forever (print "hi ")) hi hi hi hi hi hi hi hi hi hi hi ....
This is the fun part of any Lisp, you 2 can make your own control structures and 1 in return you avoid a lot of boilerplate code.
(loop [] (calc) (recur))
0
Another solution would be to use repeatedly like:
(repeatedly calc)
Rather 4 than an infinte loop, this returns an infinite 3 sequence. The lazy sequence will be a little 2 slower than a tight loop but allows for 1 some control of the loop as well.
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