相关疑难解决方法(0)

我试图将ant ANTLR3语法转换为ANTLR4语法,以便将它与antlr4-python2-runtime一起使用.该语法是C/C++模糊解析器.

在转换它(基本上删除树操作符和语义/语法谓词)之后,我使用以下方法生成了Python2文件:

java -jar antlr4.5-complete.jar -Dlanguage=Python2 CPPGrammar.g4

并且生成的代码没有任何错误,所以我在我的python项目中导入它(我使用PyCharm)进行一些测试:

import sys, time
from antlr4 import *
from parser.CPPGrammarLexer import CPPGrammarLexer
from parser.CPPGrammarParser import CPPGrammarParser

currenttimemillis = lambda: int(round(time.time() * 1000))

def is_string(object):
    return isinstance(object,str)

def parsecommandstringline(argv):
    if(2!=len(argv)):
        raise IndexError("Invalid args size.")
    if(is_string(argv[1])):
        return True
    else:
        raise TypeError("Argument must be str type.")

def doparsing(argv):
    if parsecommandstringline(argv):
        print("Arguments: OK - {0}".format(argv[1]))
        input = FileStream(argv[1])
        lexer = CPPGrammarLexer(input)
        stream = CommonTokenStream(lexer)
        parser = CPPGrammarParser(stream)
        print("*** Parser: START ***")
        start = …