def p_optional_policy(p):
'''
optional_policy : OPT_POLICY OPAREN TICK interface_stmts SQUOTE CPAREN
'''
o = refpolicy.OptionalPolicy()
o.children = p[4]
p[0] = [o]
def p_optional_policy(p):
'''optional_policy : OPT_POLICY OPAREN TICK interface_stmts SQUOTE CPAREN
| OPT_POLICY OPAREN TICK interface_stmts SQUOTE COMMA TICK interface_stmts SQUOTE CPAREN
'''
o = refpolicy.OptionalPolicy()
collect(p[4], o, val=True)
if len(p) > 7:
collect(p[8], o, val=False)
p[0] = [o]