def ele(self, name): # name of terminals are lower-cased, non-terminals are upper-cased
last_alt = self.alts[-1]
if name.islower():
last_alt.append(terminal(name))
else:
if name not in rule.name_rule_mapping:
raise Exception("Undefined non-terminal: " + name)
last_alt.append(rule.name_rule_mapping[name])
return self
def ele(
self, name
): # name of terminals are lower-cased, non-terminals are upper-cased
last_alt = self.alts[-1]
if name.islower():
last_alt.append(terminal(name))
else:
if name not in rule.name_rule_mapping:
raise Exception("Undefined non-terminal: " + name)
last_alt.append(rule.name_rule_mapping[name])
return self
def __kleene(self, constructor, *elements):
eles = []
for e in elements:
if e.islower():
eles.append(terminal(e))
else:
if e not in self.name_rule_mapping:
raise Exception("Undefined non-terminal: " + e)
eles.append(rule.name_rule_mapping[e])
ks = constructor(eles)
last_alt = self.alts[-1]
last_alt.append(ks)
return self
def __kleene(self, constructor, *elements):
eles = []
for e in elements:
if e.islower():
eles.append(terminal(e))
else:
if e not in self.name_rule_mapping:
raise Exception("Undefined non-terminal: " + e)
eles.append(rule.name_rule_mapping[e])
ks = constructor(eles)
last_alt = self.alts[-1]
last_alt.append(ks)
return self
