def __get_driven_sig_name(self, tree: Tree):
"""
determines which signal is the signal that is being driven
currently, it returns the first hvarref node, which is true.
But this might be changed at a later point
"""
for t in tree.iter_subtrees_topdown():
if type(t) == Tree and t.data == 'hvarref':
return t.children[0]
def iter_tokens(tree: Tree) -> Iterable[Token]:
for t in tree.iter_subtrees_topdown():
for child in t.children:
if isinstance(child, Token):
yield child