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"""
A simple deeply recursive target.
The target below specifies None as the argument types list.
This is a case treated specially in driver.py . If the list
of input types is empty, it is meant to be a list of strings,
actually implementing argv of the executable.
"""
import os, sys
def debug(msg):
os.write(2, "debug: " + msg + '\n')
# __________ Entry point __________
def ackermann(x, y):
if x == 0:
return y + 1
if y == 0:
return ackermann(x - 1, 1)
return ackermann(x - 1, ackermann(x, y - 1))
def entry_point(argv):
debug(str(ackermann(3, 12)) + "\n")
return 0
# _____ Define and setup target ___
def target(*args):
return entry_point, None
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