def evaluate(self, t:ParseTree):
dummyRoot = ParserRuleContext()
dummyRoot.children = [t] # don't set t's parent.
work = [dummyRoot]
for i in range(0, len(self.elements)):
next = set()
for node in work:
if len( node.children) > 0 :
# only try to match next element if it has children
# e.g., //func/*/stat might have a token node for which
# we can't go looking for stat nodes.
matching = self.elements[i].evaluate(node)
next |= matching
i += 1
work = next
return work
def evaluate(self, t: ParseTree):
dummyRoot = ParserRuleContext()
dummyRoot.children = [t] # don't set t's parent.
work = [dummyRoot]
for element in self.elements:
work_next = list()
for node in work:
if not isinstance(node, TerminalNode) and node.children:
# only try to match next element if it has children
# e.g., //func/*/stat might have a token node for which
# we can't go looking for stat nodes.
matching = element.evaluate(node)
# See issue antlr#370 - Prevents XPath from returning the
# same node multiple times
matching = filter(lambda m: m not in work_next, matching)
work_next.extend(matching)
work = work_next
return work
def ctx():
"""Returns a dummy rule context"""
return ParserRuleContext()
