I am trying to get a Python regex to search through a .c file and get the function(s) inside it.
我试图让Python正则表达式搜索.c文件并获取其中的函数。
For example:
例如：
int blahblah(
struct _reent *ptr __attribute__((unused)),
const char *old,
const char *new
)
{
...
I would want to get blahblah as the function.
我想把blahblah作为功能。
This regex doesn't work for me, it keeps on giving me None: r"([a-zA-Z0-9]*)\s*\([^()]*\)\s*{"
这个正则表达式对我不起作用，它一直给我无：r“（[a-zA-Z0-9] *）\ s * \（[^（）] * \）\ s * {”
3 个解决方案
#1
3
(?<=(int\s)|(void\s)|(string\s)|(double\s)|(float\s)|(char\s)).*?(?=\s?\()
（<=（INT \ S）|？（空隙\ S）|（串\ S）|（双\ S）|（浮子\ S）|（炭\ S））。？？？*（= \ S \ （）
http://regexr.com?3332t
This should work for what you want. Just keep adding types that you need to catch.
这应该适合你想要的。只需继续添加您需要捕获的类型。
re.findall(r'(?<=(?<=int\s)|(?<=void\s)|(?<=string\s)|(?<=double\s)|(?<=float\s)|(?<=char\s)).*?(?=\s?\()', string) will work for python.
re.findall（R'（<=（<= INT \ S）|？？？（<=空隙\ S）|（<=串\ S）|？（<=双\ S）|？（<= float \ s）|（？<= char \ s））。*？（？= \ s？\（）'，string）适用于python。
#2
3
The regular expression isn't catching it because of the parentheses in the arguments (specifically, the parentheses in __attribute__((unused))). You might be able to adapt the regular expression for this case, but in general, regular expressions cannot parse languages like C. You may want to use a full-fledged parser like pycparser.
由于参数中的括号（特别是__attribute __（（unused））中的括号，正则表达式没有捕获它。您可能能够为这种情况调整正则表达式，但一般来说，正则表达式无法解析像C这样的语言。您可能希望使用像pycparser这样的完整解析器。
#3
0
Regexps are not a proper tool for extracting some semantic information from source code files (though they're good for syntax highlighting - because syntax is often expressed through regular expressions). Regexps can't handle nested constructions, track what is going on, distingiush types and symbols.
正则表达式不是从源代码文件中提取某些语义信息的适当工具（尽管它们有利于语法高亮 - 因为语法通常通过正则表达式表达）。 Regexp无法处理嵌套构造，跟踪正在发生的事情，distingiush类型和符号。
I'd recommend some specialized tool that is really aware of the language structure, like ctags or python-pygccxml.
我推荐一些真正了解语言结构的专用工具，比如ctags或python-pygccxml。
ctags is a program that generates a list of entities in a C source with with their places (used to assist navigation through C code bases in text editors like vi and emacs). python-pygccxml is a Python binding to C library libgccxml that uses gcc internals to analyze the code and produces rich and structured output about program semantics.
ctags是一个程序，它可以生成C源中的实体列表及其位置（用于帮助在文本编辑器（如vi和emacs）中通过C代码库进行导航）。 python-pygccxml是一个Python库绑定到C库libgccxml，它使用gcc内部来分析代码并生成有关程序语义的丰富和结构化输出。
#1
3
(?<=(int\s)|(void\s)|(string\s)|(double\s)|(float\s)|(char\s)).*?(?=\s?\()
（<=（INT \ S）|？（空隙\ S）|（串\ S）|（双\ S）|（浮子\ S）|（炭\ S））。？？？*（= \ S \ （）
http://regexr.com?3332t
This should work for what you want. Just keep adding types that you need to catch.
这应该适合你想要的。只需继续添加您需要捕获的类型。
re.findall(r'(?<=(?<=int\s)|(?<=void\s)|(?<=string\s)|(?<=double\s)|(?<=float\s)|(?<=char\s)).*?(?=\s?\()', string) will work for python.
re.findall（R'（<=（<= INT \ S）|？？？（<=空隙\ S）|（<=串\ S）|？（<=双\ S）|？（<= float \ s）|（？<= char \ s））。*？（？= \ s？\（）'，string）适用于python。
#2
3
The regular expression isn't catching it because of the parentheses in the arguments (specifically, the parentheses in __attribute__((unused))). You might be able to adapt the regular expression for this case, but in general, regular expressions cannot parse languages like C. You may want to use a full-fledged parser like pycparser.
由于参数中的括号（特别是__attribute __（（unused））中的括号，正则表达式没有捕获它。您可能能够为这种情况调整正则表达式，但一般来说，正则表达式无法解析像C这样的语言。您可能希望使用像pycparser这样的完整解析器。
#3
0
Regexps are not a proper tool for extracting some semantic information from source code files (though they're good for syntax highlighting - because syntax is often expressed through regular expressions). Regexps can't handle nested constructions, track what is going on, distingiush types and symbols.
正则表达式不是从源代码文件中提取某些语义信息的适当工具（尽管它们有利于语法高亮 - 因为语法通常通过正则表达式表达）。 Regexp无法处理嵌套构造，跟踪正在发生的事情，distingiush类型和符号。
I'd recommend some specialized tool that is really aware of the language structure, like ctags or python-pygccxml.
我推荐一些真正了解语言结构的专用工具，比如ctags或python-pygccxml。
ctags is a program that generates a list of entities in a C source with with their places (used to assist navigation through C code bases in text editors like vi and emacs). python-pygccxml is a Python binding to C library libgccxml that uses gcc internals to analyze the code and produces rich and structured output about program semantics.
ctags是一个程序，它可以生成C源中的实体列表及其位置（用于帮助在文本编辑器（如vi和emacs）中通过C代码库进行导航）。 python-pygccxml是一个Python库绑定到C库libgccxml，它使用gcc内部来分析代码并生成有关程序语义的丰富和结构化输出。