javacc 跳过注释但需要保留有用的注释
我需要使用 javaCC 来解析数据文件，例如：
//这是要跳过的注释
//这也是要跳过的注释
//学生表
开始：
标题:( 1 //名称 2 //年龄 ) { "约翰" 21 } { "杰克" "22" }
#结束
//下面是教师表，这一行也是注释跳过
//教师表
开始：
标题:( 1 //名称 2 //年龄 3 //班级 ) { "Eric" 31 "英语" } { "Jasph" "32" "历史" }
#结束
这里我需要从“student”和“teacher”表中获取数据，还有其他一些表格的格式如上。从“student”表导出的数据是：
Table Name: student
name age
John 21
Jack 22
也就是说我需要跳过注释，例如：“//这也是要跳过的注释”，但需要保留标记，例如：“//学生表”、“//教师表”、“//姓名”、“//年龄”等。写这样的SKIP表达式？谢谢。
I need to use javaCC to parse a data file like:
//This is comment to skip
//This is also comment to skip
//student Table
Begin:
header:( 1 //name
2 //age ) { "John" 21 } { "Jack" "22" }#End
//The following is teacher table, this line is also comment to skip
//Teacher Table
Begin:
header:( 1 //name
2 //age 3 //class ) { "Eric" 31 "English" } { "Jasph" "32" "History" }#End
Here I need to fetch data from "student" and "teacher" tables, there are also some other tables formatted like above. Data exported from "student" table is:
Table Name: student
name age
John 21
Jack 22
That is I need to skip comments like: "//This is also comment to skip", but need to keep the tokens like: "//student Table", "//Teacher Table", "//name", "//age" etc. How to write such SKIP expression? Thanks.
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有点晚了，但你可能看错了。
当然，在您的情况下， // 并不是真正的注释，它是您正在解析的语法的一部分。只是有时 // 后面的位是无关紧要的。
我会解析这些注释并决定在 Java 代码中丢弃哪些注释。
Slightly late, but you might be looking at it wrong.
Surely in your case, // isn't really a comment, it is part of the syntax you are parsing. It just happens that sometimes the bit following // is irrelevant.
I would parse the comments and decide which ones to discard in your Java code.