def p_bgp_2(p):
"""
bgp : FILTER LPAR expression RPAR
"""
p[0] = Filter(p[3])
def p_bgp_3(p):
"""
bgp : FILTER express_rel
"""
p[0] = Filter(p[2])
def p_bgp_service_3(p):
"""
bgp_service : FILTER express_rel
"""
p[0] = Filter(p[2])