def testloop(self):
eq_(eval(let([(i,3)],
block(a, set(i, sub(i, 1)),
if_(eq(i, 0), exit_block(a, 1)),
continue_block(a)), i)), 0)
def test_unwind_protect_loop(self):
eq_(eval(let([(i,3)],
block(a, set(i, sub(i, 1)),
if_(eq(i, 0), exit_block(a, 1)),
unwind_protect(continue_block(a), prin(2))), i)), 0)
def testif_add_sub(self): eq_(eval(if_(0, add, sub)(1, 1)), 0) eq_(eval(if_(1, add, sub)(1, 1)), 2)
def testif_(self): eq_(eval(if_(0, 1, 2)), 2)
def testletroddeven(self):
eq_(eval(letr([(odd, lambda_([n], if_(eq(n,0), 0, even(sub(n,1))))),
(even, lambda_([n], if_(eq(n,0), 1, odd(sub(n, 1)))))],
odd(3))), 1)
def testletrfac(self):
eq_(eval(letr([(fac, lambda_([n], if_(eq(n,1), 1, mul(n, fac(sub(n, 1))))))],
fac(3))), 6)
def testletr(self):
eq_(eval(letr([(f, lambda_([n], if_(eq(n, 1), 1, f(sub(n, 1)))))],
f(2))), 1)
