[antlr-interest] how to match any char between two string?

[陈凯成]

Hi!

I hava to intercept a expression between two string, and then send to another application.

like a Java regex, for example:

// -------------------------------------------------------------------------
// Java Code Begin
// -------------------------------------------------------------------------

String regex  = "select\\s+((.)+)\\s+from";
Pattern p = Pattern.complie(regex);
Matcher m = p.matcher("select stu.id as 'Student ID', stu.name as 'Student Name' from");
String select = null;
if(m.find()){
    select = m.group(1);
}
System.out.println(select);// print [stu.id as 'Student ID', stu.name as 'Student Name']
send(select);// send to another application.

// -------------------------------------------------------------------------

// Java Code End

// -------------------------------------------------------------------------

I try to write a sample grammar file, but it dosen't works.

// -------------------------------------------------------------------------

// Grammar File Begin

// -------------------------------------------------------------------------

start        :    'select' WS SELECT WS 'from';
SELECT    :    (.)+ {
    System.out.println(getText());
    send(getText());
};
WS         :    ( '\t' | ' ' | '\r' | '\n'| '\u000C' )+;

// -------------------------------------------------------------------------


// Grammar File End


// -------------------------------------------------------------------------

I get a error message as follow when I generate code:

// -------------------------------------------------------------------------


// Error Message Begin


// -------------------------------------------------------------------------

[23:31:49] error(208): Sql.g:28:1: The following token definitions can never be matched because prior tokens match the same input: WS

// -------------------------------------------------------------------------


// Message Begin


// -------------------------------------------------------------------------

Thanks a lot!

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