如何在语法或解析错误上引发有意义的错误 [英] How to throw meaningful error on syntax or parsing error

问题描述

我有一个解析jcl的语法

I have a grammar for parsing jcl

jcl如下所示 /*注释行 //PR1290 @ JOB(10)，"ISPW COB SN900E"

The jcl looks like below /*comment line //PR1290@ JOB (10),'ISPW COB SN900E'

词法分析器和解析器工作正常. 假设而不是//如果jcl从/开始，当前lexer在以下位置抛出1:0令牌识别错误:'/P'

lexer and parser is working perfectly fine. Suppose instead of // if jcl starts from / currently lexer is throwing 1:0 token recognition error at: '/P'

解析器不会抛出任何可行的替代输入R1290 @ JOB

Parser will throw no viable alternative input R1290@ JOB

我正在寻找在编辑时抛出类似于eclipse的错误.

I am looking for throwing error similar to eclipse while editing.

public void Test(){
//test 
//}

上面将说语法错误insert}来完成方法主体.

Above will say syntax error insert } to complete method body..

与此类似的事情，我想指出正确的错误消息，指出"jcl行应以//开头"

Something similar to this I want to point out right error message saying "jcl lines should start with // "

下面的示例jcl行 //NAME Operationname parameter = parametervalue

Example jcl line is below //NAME Operationname parameter=parametervalue

如果//丢失，我想抛出一句话，该行应以//开头 操作名称应为JOB或PROC 如果缺少关键字，则输入有效的关键字参数

If // is missing i want to throw saying line should start with // Operation name should be either JOB or PROC if keyword is missing then enter valid keyword parameter

并且如果缺少任何参数，我想指出该写意向用户显示完整消息.

and if any parameter is missing i want to point out that write meaning full message to user.

我正在使用antlr 4.7.2版本

I am using antlr 4.7.2 version

推荐答案

您可以先添加自己的错误侦听器...

You can start with adding your own error listener ...

请参见 https://learning.oreilly. com/library/view/the-definitive-antlr/9781941222621/f_0062.html

我觉得足够了，但您可能会需要更多

I find it enough but you will likely need more

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