38 lines
759 B
Forth
38 lines
759 B
Forth
# Example program showing that a 'paused' continuation can be 'resumed'
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# multiple times from the same point (but with changes to data).
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#
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# To run:
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# $ git clone https://github.com/akkartik/mu
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# $ cd mu
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# $ ./mu continuation2.mu
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#
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# Expected output:
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# 1
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# 2
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# 3
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def main [
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local-scope
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l:&:list:num <- copy null
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l <- push 3, l
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l <- push 2, l
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l <- push 1, l
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k:continuation <- call-with-continuation-mark 100/mark, create-yielder, l
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{
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x:num, done?:bool <- call k
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break-if done?
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$print x 10/newline
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loop
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}
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]
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def create-yielder l:&:list:num -> n:num, done?:bool [
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local-scope
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load-inputs
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return-continuation-until-mark 100/mark
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done? <- equal l, null
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return-if done?, 0/dummy
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n <- first l
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l <- rest l
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]
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