def _assert_clone(self, matcher, copy):
original = preorder(matcher, Matcher)
duplicate = preorder(copy, Matcher)
try:
while True:
o = next(original)
d = next(duplicate)
assert type(o) == type(d), (str(o), str(d), o, d)
if isinstance(o, Matcher):
assert o is not d, (str(o), str(d), o, d)
else:
assert o is d, (str(o), str(d), o, d)
except StopIteration:
self.assert_empty(original, 'original')
self.assert_empty(duplicate, 'duplicate')
def test_reset(self):
nodes = preorder(graph(), SimpleNode, exclude=LEAF)
assert next(nodes).label == 1
assert next(nodes).label == 11
reset(nodes)
assert next(nodes).label == 1
assert next(nodes).label == 11
def test_reset(self):
nodes = preorder(graph(), SimpleNode, exclude=LEAF)
assert next(nodes).label == 1
assert next(nodes).label == 11
reset(nodes)
assert next(nodes).label == 1
assert next(nodes).label == 11
def __call__(self, graph):
from lepl.matchers.core import Delayed
from lepl.matchers.combine import Or
for delayed in [x for x in preorder(graph, Matcher)
if isinstance(x, Delayed)]:
for loop in either_loops(delayed, self.conservative):
for i in range(len(loop)):
if is_child(loop[i], Or, fail=False):
# we cannot be at the end of the list here, since that
# is a Delayed instance
# copy from tuple to list
loop[i].matchers = list(loop[i].matchers)
matchers = loop[i].matchers
target = loop[i+1]
# move target to end of list
index = matchers.index(target)
del matchers[index]
matchers.append(target)
return graph
def __call__(self, graph):
from lepl.matchers.core import Delayed
from lepl.matchers.combine import Or
for delayed in [
x for x in preorder(graph, Matcher) if isinstance(x, Delayed)
]:
for loop in either_loops(delayed, self.conservative):
for i in range(len(loop)):
if is_child(loop[i], Or, fail=False):
# we cannot be at the end of the list here, since that
# is a Delayed instance
# copy from tuple to list
loop[i].matchers = list(loop[i].matchers)
matchers = loop[i].matchers
target = loop[i + 1]
# move target to end of list
index = matchers.index(target)
del matchers[index]
matchers.append(target)
return graph
def __call__(self, graph):
self._warn('Alternatives are being re-ordered to improve stability with left-recursion.\n'
'This will change the ordering of results.')
#raise Exception('wtf')
for delayed in [x for x in preorder(graph, Matcher)
if isinstance(x, Delayed)]:
for loop in either_loops(delayed, self.conservative):
for i in range(len(loop)):
if is_child(loop[i], Or, fail=False):
# we cannot be at the end of the list here, since that
# is a Delayed instance
# copy from tuple to list
loop[i].matchers = list(loop[i].matchers)
matchers = loop[i].matchers
target = loop[i+1]
# move target to end of list
index = matchers.index(target)
del matchers[index]
matchers.append(target)
return graph
def __call__(self, graph):
self._warn('Alternatives are being re-ordered to improve stability with left-recursion.\n'
'This will change the ordering of results.')
#raise Exception('wtf')
for delayed in [x for x in preorder(graph, Matcher)
if isinstance(x, Delayed)]:
for loop in either_loops(delayed, self.conservative):
for i in range(len(loop)):
if is_child(loop[i], Or, fail=False):
# we cannot be at the end of the list here, since that
# is a Delayed instance
# copy from tuple to list
loop[i].matchers = list(loop[i].matchers)
matchers = loop[i].matchers
target = loop[i+1]
# move target to end of list
index = matchers.index(target)
del matchers[index]
matchers.append(target)
return graph
def test_preorder(self):
result = [
node.label for node in preorder(graph(), SimpleNode, exclude=LEAF)
]
assert result == [1, 11, 111, 112, 12], result
def test_preorder(self):
g = [1, [11, [111, 112], 12]]
result = [node for node in preorder(g, list) if isinstance(node, int)]
assert result == [1, 11, 111, 112, 12], result
def test_preorder(self):
result = [node.label for node in preorder(graph(), SimpleNode, exclude=LEAF)]
assert result == [1, 11, 111, 112, 12], result
def test_preorder(self):
g = [1, [11, [111, 112], 12]]
result = [node for node in preorder(g, list) if isinstance(node, int)]
assert result == [1, 11, 111, 112, 12], result
def pairs(matcher):
for a in preorder(matcher, Matcher):
for b in preorder(matcher, Matcher):
yield (a, b)