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问题描述

限时删除!!

初学者提问:如何将可读版本的解析树打印到stdout?

  CharStream input = CharStreams.fromFileName ( TESTDATA / test.txt的); 
MyLexer lexer = new MyLexer(输入);
CommonTokenStream tokens = new CommonTokenStream(lexer);
MyParser解析器= new MyParser(令牌);
parser.setBuildParseTree(true);
RuleContext tree = parser.record();
System.out.println(tree.toStringTree(parser));

这会将整个树打印在由括号'()'分隔的一行上。

 (记录(丈夫< 4601>(姓名KOHAI Nikolaus)\ n(出生* um.1872(地点Ploschitz) )(妻子(婚姻oo)\ n(姓名SCHLOTTHAUER Maria)\ n(出生* um.1877 
...

我想要这样的东西

 记录
丈夫
< id>
名称
< name>
...
妻子


解决方案

除了图形解析树


Beginners question: how do I print a readable version of the parse tree to stdout?

CharStream input = CharStreams.fromFileName("testdata/test.txt");
MyLexer lexer = new MyLexer(input);
CommonTokenStream tokens = new CommonTokenStream(lexer);
MyParser parser = new MyParser(tokens);
parser.setBuildParseTree(true);
RuleContext tree = parser.record();
System.out.println(tree.toStringTree(parser));

this prints the whole tree on a single line delimited by brackets '()'.

(record (husband <4601>   (name KOHAI   Nikolaus) \n (birth *   um.1872   (place Ploschitz)) \n\n) (wife      (marriage oo) \n      (name SCHLOTTHAUER   Maria) \n      (birth *   um.1877
...

I would like to have something like this

record
  husband
    <id>
    name
       <name>
...
  wife
解决方案

Besides a graphical parse tree my ANTLR4 extension for Visual Studio Code also produces a formatted text parse tree:

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1403页,肝出来的..

09-07 12:54