class ActionParser(Parser):
def __init__(self,rule,parent):
if not isinstance(rule, Action):
raise Exception("Cannot use an ActionParser on a non-Action rule")
Parser.__init__(self, rule, parent)
self.actioned = False
self.active = MakeParser(rule.items, self)
def parse(self,token):
disp = self.active.parse(token)
self.bad = self.active.bad
self.done = self.active.done
if not self.actioned and not self.bad and self.done:
self.rule.func(self)
self.actioned = True
return disp
return ''
# The Action's msg should contain at most a single %s, which will be filled
# by the display of its sub-parser. It may have other text in its msg which
# we'll want to display too. So we let the Rule do the work.
def display(self):
d = self.active.display()
return self.rule.display([d])
