ASN源代码意外的TOK_capitalreference，期待'}'

Question

完成ASN.1源代码时给出错误：“第19行附近的ASN.1语法分析错误（令牌”IDENTIFIED“）：语法错误，意外的TOK_capitalreference，期待'}'无法解析”test.asn“”

---

RSI DEFINITIONS AUTOMATIC TAGS ::= BEGIN

MessageFrame ::= SEQUENCE {
    messageId       MESSAGE-ID-AND-TYPE.&id({MessageTypes}),
    value           MESSAGE-ID-AND-TYPE.&Type({MessageTypes}{@.messageId})
}

MESSAGE-ID-AND-TYPE ::= CLASS {
    &id         RSImsgID UNIQUE,
    &Type
} WITH SYNTAX { &Type IDENTIFIED BY &id }

MessageTypes MESSAGE-ID-AND-TYPE ::= {
    { Message1      IDENTIFIED BY message1 } | 
    { Message2  IDENTIFIED BY message2 }
}

Message1 ::= SEQUENCE {
    msgCnt          MsgCount,
    id          TemporaryID
}

Message2 ::= SEQUENCE {
    msgCnt          MsgCount,
    id          TemporaryID
}

TemporaryID ::= OCTET STRING (SIZE(4))
MsgCount ::= INTEGER (0..127)
RSImsgID ::= INTEGER (0..32767)
message1    RSImsgID ::= 0 --'00'H
message2    RSImsgID ::= 1 --'01'H
END

---

编译器显示语法错误。请帮助我，我错过了什么。

Answer 1

您似乎正在使用Lev Walkin's asn1c compiler，遗憾的是它尚未完全支持信息对象类。

你可以尝试一个pending pull request #99。另见github issue #108

更新2019-04-11

Information Object Class和Information Object Set的解析已经完成并合并在master的PR #154 分支

以下是如何使用当前的master分支编译和测试上述ASN.1定义（commit 88ed3b5c）

$ asn1c test.asn
$ make -f converter-example.mk
$ ./converter-example -pMessageFrame -iber <(echo 3010800100a10b3009800101810411223344 | xxd -r -p) -o xer

<MessageFrame>
    <messageId>0</messageId>
    <value>
        <Message1>
            <msgCnt>1</msgCnt>
            <id>11 22 33 44</id>
        </Message1>
    </value>
</MessageFrame>

$ ./converter-example -pMessageFrame -iber <(echo 3010800100a10b3009800101810411223344 | xxd -r -p) -o text
MessageFrame ::= {
    messageId: 0
    value: Message1 ::= {
        msgCnt: 1
        id: 11 22 33 44
    }
}

如果master分支不起作用，请尝试使用vlm_master的mouse07410's frok分支

Answer 2

使用http://asn1-playground.oss.com/正确编译模式。最有可能的是，您使用的编译器未正确实现WITH SYNTAX功能。您可以尝试修改模式，以便不使用WITH SYNTAX并使用标准语法编写对象集初始化，即：

MESSAGE-ID-AND-TYPE ::= CLASS {
    &id         RSImsgID UNIQUE,
    &Type
}

MessageTypes MESSAGE-ID-AND-TYPE ::= {
    { &Type Message1, &id message1 } | 
    { &Type Message2, &id message2 }
}