如何使用 ANTLRv4 解析 Python 中的 Java 代码

Question

我正在尝试使用 ANTLRv4 解析 Python 中的一些 Java 代码。我尝试遵循，但出现以下错误：

  File "/home/xxxxxxx/xxxxxxx/xxxxxxx/antlr/proto_antlr.py", line 14, in <module>
    main()
  File "/home/xxxxxxx/xxxxxxx/xxxxxxx/antlr/proto_antlr.py", line 9, in main
    tree = parser.compilationUnit()
  File "/home/xxxxxxx/xxxxxxx/xxxxxxx/antlr/Java8Parser.py", line 4182, in compilationUnit
    self.enterRule(localctx, 62, self.RULE_compilationUnit)
  File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/Parser.py", line 374, in enterRule
    self._ctx.start = self._input.LT(1)
  File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/CommonTokenStream.py", line 62, in LT
    self.lazyInit()
  File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/BufferedTokenStream.py", line 187, in lazyInit
    self.setup()
  File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/BufferedTokenStream.py", line 190, in setup
    self.sync(0)
  File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/BufferedTokenStream.py", line 112, in sync
    fetched = self.fetch(n)
  File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/BufferedTokenStream.py", line 124, in fetch
    t = self.tokenSource.nextToken()
  File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/Lexer.py", line 130, in nextToken
    self._tokenStartLine = self._interp.line_number
AttributeError: 'LexerATNSimulator' object has no attribute 'line_number'

我不知道我做错了什么。我要解析的文件是 proper Java, it's extracted from the docker-maven-plugin 包。我试过其他文件，但我得到了同样的错误。

有什么想法吗？

Answer 1

实际上这只是一个暴力重构的问题......我已经在我的代码中将行更改为line_number，它实际上也在库中更改了它。将其改回 line 即可解决问题。

感谢@Thomas Kläger 让我意识到这一点。

如何使用 ANTLRv4 解析 Python 中的 Java 代码

How to parse Java code in Python using ANTLRv4

python

java

antlr

python-3.x

antlr4