regex - Javacc 正则表达式匹配除某些字符串之外的所有字符串

Question

匹配 任何内容 的正则表达式是什么，除了这些字符串: =>, | ?

如果您熟悉 javacc，我正在尝试定义我的 ANYTHING 标记，如下所示:

TOKEN :
{
 <ARROW: "=>" >
|
 <ANYTHING: (["\u0001" - "\uffdc"])+>
|
 <PIPE: "|">
|
 <UPPER_CHAR: (["A"-"Z"])>
}

谢谢

Answer 1

尝试这样的事情:

测试.jj

options {
    STATIC = false ;
}

PARSER_BEGIN(Test)
public class Test {
  public static void main(String[] args) throws Exception {
    Test parser = new Test(new java.io.StringReader("foo=>bar=baz|done"));
    parser.Parse();
  }
}
PARSER_END(Test)

TOKEN :
{
     < ARROW    : "=>" >
  |  < PIPE     : "|" >
  |  < ANYTHING : (~["=", "|"] | "=" ~[">"])+ >
}

void Parse() : 
{} 
{
  (Any())* <EOF>
}

void Any() :
{Token t;}
{
  ( t=<ARROW>    {System.out.println("ARROW    = '" + t.image + "'");}
  | t=<PIPE>     {System.out.println("PIPE     = '" + t.image + "'");}
  | t=<ANYTHING> {System.out.println("ANYTHING = '" + t.image + "'");}
  )  
}

生成解析器类:

javacc Test.jj

并运行main方法:

java Test

将为输入打印以下内容“foo=>bar=baz|done”:

ANYTHING = 'foo'ARROW    = '=>'ANYTHING = 'bar=baz'PIPE     = '|'ANYTHING = 'done'