mu/continuation1.mu
Kartik K. Agaram 5059f32d0d 4160 - named marks for delimited continuations
Hypothesis: this is needed to build McCarthy's amb operator.
  https://rosettacode.org/wiki/Amb
2017-12-15 00:15:47 -08:00

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# Example program showing that 'return-continuation-until-mark' can 'pause' a
# function call, returning a continuation, and that calling the continuation
# can 'resume' the paused function call.
#
# To run:
# $ git clone https://github.com/akkartik/mu
# $ cd mu
# $ ./mu continuation1.mu
#
# Expected output:
# 1
def main [
local-scope
k:continuation <- call-with-continuation-mark 100/mark, create-yielder
x:num <- call k # should return 1
$print x 10/newline
]
def create-yielder -> n:num [
local-scope
load-inputs
return-continuation-until-mark 100/mark
return 1
]