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