def p_pvar_inst_def(self, p):
        '''pvar_inst_def : IDENT LPAREN lconst_list RPAREN SEMI
                         | IDENT SEMI
                         | NOT IDENT LPAREN lconst_list RPAREN SEMI
                         | NOT IDENT SEMI
                         | IDENT LPAREN lconst_list RPAREN ASSIGN_EQUAL range_const SEMI
                         | IDENT ASSIGN_EQUAL range_const SEMI'''
        if len(p) == 6:
            p[0] = ((p[1], p[3]), True)
        elif len(p) == 3:
            p[0] = ((p[1], None), True)
        elif len(p) == 7:
            p[0] = ((p[2], p[4]), False)
        elif len(p) == 4:
            p[0] = ((p[2], None), False)
        elif len(p) == 8:
            p[0] = ((p[1], p[3]), p[6])
        elif len(p) == 5:
            p[0] = ((p[1], None), p[3])
pvar_inst_def : IDENT LPAREN lconst_list RPAREN SEMI
                         | IDENT SEMI
                         | NOT IDENT LPAREN lconst_list RPAREN SEMI
                         | NOT IDENT SEMI
                         | IDENT LPAREN lconst_list RPAREN ASSIGN_EQUAL range_const SEMI
                         | IDENT ASSIGN_EQUAL range_const SEMI