def ClauseD(self, rule,tokens, _parent=None):
_context = self.Context(_parent, self._scanner, 'ClauseD', [rule,tokens])
_token = self._peek('STR', 'ID', 'LP', 'LB', 'STMT', context=_context)
if _token == 'STR':
STR = self._scan('STR', context=_context)
t = (STR, eval(STR,{},{}))
if t not in tokens: tokens.insert( 0, t )
return parsetree.Terminal(rule, STR)
elif _token == 'ID':
ID = self._scan('ID', context=_context)
OptParam = self.OptParam(_context)
return resolve_name(rule,tokens, ID, OptParam)
elif _token == 'LP':
LP = self._scan('LP', context=_context)
ClauseA = self.ClauseA(rule,tokens, _context)
RP = self._scan('RP', context=_context)
return ClauseA
elif _token == 'LB':
LB = self._scan('LB', context=_context)
ClauseA = self.ClauseA(rule,tokens, _context)
RB = self._scan('RB', context=_context)
return parsetree.Option(rule, ClauseA)
else: # == 'STMT'
STMT = self._scan('STMT', context=_context)
return parsetree.Eval(rule, STMT[2:-2])
def ClauseD(self, rule, tokens, _parent=None):
_context = self.Context(_parent, self._scanner, self._pos, 'ClauseD',
[rule, tokens])
_token = self._peek()
if _token == 'STR':
STR = self._scan('STR')
t = (STR, eval(STR, {}, {}))
if t not in tokens: tokens.insert(0, t)
return parsetree.Terminal(rule, STR)
elif _token == 'ID':
ID = self._scan('ID')
OptParam = self.OptParam(_context)
return resolve_name(rule, tokens, ID, OptParam)
elif _token == 'LP':
LP = self._scan('LP')
ClauseA = self.ClauseA(rule, tokens, _context)
RP = self._scan('RP')
return ClauseA
elif _token == 'LB':
LB = self._scan('LB')
ClauseA = self.ClauseA(rule, tokens, _context)
RB = self._scan('RB')
return parsetree.Option(rule, ClauseA)
elif _token == 'STMT':
STMT = self._scan('STMT')
return parsetree.Eval(rule, STMT[2:-2])
else:
raise yappsrt.SyntaxError(_token[0], 'Could not match ClauseD')
def resolve_name(rule, tokens, id, args):
if id in [x[0] for x in tokens]:
# It's a token
if args:
print('Warning: ignoring parameters on TOKEN %s<<%s>>' % (id, args))
return parsetree.Terminal(rule, id)
else:
# It's a name, so assume it's a nonterminal
return parsetree.NonTerminal(rule, id, args)