def test_image_rename_map_checks():
ordering = {'x': 0, 'xp': 1, 'y': 2, 'yp': 3, 'z': 4, 'zp': 5}
bdd = BDD(ordering)
# non-adjacent
rename = {0: 2, 3: 4}
qvars = set()
r = _bdd.image(1, 1, rename, qvars, bdd)
assert r == 1, r
r = _bdd.preimage(1, 1, rename, qvars, bdd)
assert r == 1, r
# overlapping keys and values
rename = {0: 1, 1: 2}
with nt.assert_raises(AssertionError):
_bdd.image(1, 1, rename, qvars, bdd)
with nt.assert_raises(AssertionError):
_bdd.preimage(1, 1, rename, qvars, bdd)
# may be in support after quantification ?
trans = bdd.add_expr('x => xp')
source = bdd.add_expr('x /\ y')
qvars = {0}
rename = {1: 0, 3: 2}
with nt.assert_raises(AssertionError):
_bdd.image(trans, source, rename, qvars, bdd)
# in support of `target` ?
qvars = set()
trans = bdd.add_expr('y')
target = bdd.add_expr('x /\ y')
rename = {0: 2}
r = _bdd.preimage(trans, target, rename, qvars, bdd)
assert r == bdd.var('y'), r
def test_image_rename_map_checks():
ordering = {'x': 0, 'xp': 1,
'y': 2, 'yp': 3,
'z': 4, 'zp': 5}
bdd = BDD(ordering)
# non-adjacent
rename = {0: 2, 3: 4}
qvars = set()
r = _bdd.image(1, 1, rename, qvars, bdd)
assert r == 1, r
r = _bdd.preimage(1, 1, rename, qvars, bdd)
assert r == 1, r
# overlapping keys and values
rename = {0: 1, 1: 2}
with nt.assert_raises(AssertionError):
_bdd.image(1, 1, rename, qvars, bdd)
with nt.assert_raises(AssertionError):
_bdd.preimage(1, 1, rename, qvars, bdd)
# may be in support after quantification ?
trans = bdd.add_expr('x => xp')
source = bdd.add_expr('x /\ y')
qvars = {0}
rename = {1: 0, 3: 2}
with nt.assert_raises(AssertionError):
_bdd.image(trans, source, rename, qvars, bdd)
# in support of `target` ?
qvars = set()
trans = bdd.add_expr('y')
target = bdd.add_expr('x /\ y')
rename = {0: 2}
r = _bdd.preimage(trans, target, rename, qvars, bdd)
assert r == bdd.var('y'), r
def image(trans, source, rename, qvars, forall=False):
assert trans.bdd is source.bdd
u = _bdd.image(trans.node, source.node, rename, qvars, trans.manager,
forall)
return trans.bdd._wrap(u)
def image(trans, source, rename, qvars, forall=False):
assert trans.bdd is source.bdd
u = _bdd.image(trans.node, source.node, rename,
qvars, trans.manager, forall)
return trans.bdd._wrap(u)
def image(trans, source, rename, qvars, bdd, forall=False):
assert trans.bdd == source.bdd
assert trans.bdd == bdd._bdd
u = _bdd.image(trans.node, source.node, rename,
qvars, trans.bdd, forall)
return bdd._wrap(u)
def image(trans, source, rename, qvars, bdd, forall=False):
assert trans.bdd == source.bdd
assert trans.bdd == bdd._bdd
u = _bdd.image(trans.node, source.node, rename, qvars, trans.bdd, forall)
return bdd._wrap(u)