def main():
"""Run the REPL."""
interp = SInterpreter()
while True:
try:
line = input('>>> ')
while line.count('(') > line.count(')'):
line += ' ' + input('... ' + ' ' * 2 * (line.count('(') -
line.count(')')))
if line.count('(') < line.count(')'):
raise Exception("Too many closing parentheses.")
sprint(interp.seval(line))
except EOFError:
print('Bye')
return
except SException as e:
print('Error:', e)
def SInterp_basic_eval_test():
interp = SInterpreter()
eq_(interp.seval('(+ 3 2)'), SNode('num', 5))
def SInterp_define_test():
interp = SInterpreter()
interp.seval('(~define x 5)')
eq_(interp.seval('x'), SNode('num', 5))
def SInterp_recursive_test():
interp = SInterpreter()
interp.seval('(~define f (~lambda (y) (~if (= y 0) 0 (f (- y 1)))))')
eq_(interp.seval('(f 2)'), SNode('num', 0))
