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我试图用来pycparser解析这个 C 代码:

https://github.com/nbeaver/mx-trunk/blob/0b80678773582babcd56fe959d5cfbb776cc0004/libMx/d_adsc_two_theta.c

带有最小示例和 Makefile 的 repo 在这里:

https://github.com/nbeaver/pycparser-problem

在 Debian Jessie 上使用pycparserv2.14(来自 pip)和 gcc 4.9.2。

我尝试过的事情:

  • -nostdinc将标志传递到gcc并包含该fake_libc_include文件夹。
  • 用于-D'__attribute__(x)='取出 GCC 扩展
  • 使用假标题,例如<sys/param.h>
  • -std=c99如果代码与 C99 不兼容,请使用。
  • 重现redis 示例,以防我的机器出现异常情况。

这是回溯的样子:

Traceback (most recent call last):
  File "just_parse.py", line 21, in <module>
    parse(path)
  File "just_parse.py", line 9, in parse
    ast = pycparser.parse_file(filename)
  File "/home/nathaniel/.local/lib/python2.7/site-packages/pycparser/__init__.py", line 93, in parse_file
    return parser.parse(text, filename)
  File "/home/nathaniel/.local/lib/python2.7/site-packages/pycparser/c_parser.py", line 146, in parse
    debug=debuglevel)
  File "/home/nathaniel/.local/lib/python2.7/site-packages/pycparser/ply/yacc.py", line 265, in parse
    return self.parseopt_notrack(input,lexer,debug,tracking,tokenfunc)
  File "/home/nathaniel/.local/lib/python2.7/site-packages/pycparser/ply/yacc.py", line 1047, in parseopt_notrack
    tok = self.errorfunc(errtoken)
  File "/home/nathaniel/.local/lib/python2.7/site-packages/pycparser/c_parser.py", line 1680, in p_error
    column=self.clex.find_tok_column(p)))
  File "/home/nathaniel/.local/lib/python2.7/site-packages/pycparser/plyparser.py", line 55, in _parse_error
    raise ParseError("%s: %s" % (coord, msg))
pycparser.plyparser.ParseError: in/d_adsc_two_theta.c:63:82: before: .

回溯指向这一行:

https://github.com/nbeaver/mx-trunk/blob/0b80678773582babcd56fe959d5cfbb776cc0004/libMx/d_adsc_two_theta.c#L63

这又指向这个#define宏:

https://github.com/nbeaver/mx-trunk/blob/0b80678773582babcd56fe959d5cfbb776cc0004/libMx/mx_motor.h#L484

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1 回答 1

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原因似乎是offsetof()功能。但是,最近的提交修复了最小的工作示例:

https://github.com/eliben/pycparser/issues/87

于 2016-09-14T18:09:13.770 回答