# SPDX-FileCopyrightText: Chris Pressey, the original author of this work, has dedicated it to the public domain.
# For more information, please refer to <https://unlicense.org/>
# SPDX-License-Identifier: Unlicense
def rcall(fun)
callcc do |continuation|
fun.call(continuation)
end
end
def a
puts "a"
rcall lambda { |k| b k }
puts "a"
end
def b(continuation)
puts "b"
c continuation # instead of: rcall lambda { |k| c k }
puts "b"
continuation.call()
end
def c(continuation)
puts "c"
continuation.call()
end
a