常用方法
常用方法
常用方法
常用方法
def parse_non_empty(self, start, level):
grammars = Cursor(self.grammars)
result = False
end = start
while grammars.not_empty() and not result:
(result, end) = grammars.head().parse(start, level + 1)
if not result:
grammars = grammars.tail()
return (result, end)
