def __unary(self, tcontext, funcname):
'''
unary = ("&" | "*") unary | ("+" | "-")? term
'''
token = tcontext.consume_symbol('&')
if token:
return NodeFactory.create_address_node(
self.__unary(tcontext, funcname))
token = tcontext.consume_symbol('*')
if token:
return NodeFactory.create_dereference_node(
self.__unary(tcontext, funcname))
token = tcontext.consume_symbol('+')
if token:
return self.__term(tcontext, funcname)
token = tcontext.consume_symbol('-')
if token:
return NodeFactory.create_ope_node(NodeTypes.SUB,
NodeFactory.create_num_node(0),
self.__term(tcontext, funcname))
return self.__term(tcontext, funcname)
def __parse_common_func(self, tcontext, funcname, map_, next_func):
node = next_func(tcontext, funcname)
while True:
for k, v in map_.items():
token = tcontext.consume_symbol(k)
if token:
node = NodeFactory.create_ope_node(
v, node, next_func(tcontext, funcname))
break
else:
return node