可以使用单个正则表达式来分析函数参数吗?

a regex engine that supports captures (as opposed to capturing groups)

find food(...) findall

pyparsing

>>> code = """\
... ...
...
... food($apples$ , $oranges$ , $pears$ , $tomato$){
...   ...
... }
... ...
... food($peanuts$, $popcorn$ ,$candybars$ ,$icecream$){
...   ...
... }
... """
>>> from pyparsing import *
>>> LPAR,RPAR,LBRACE,RBRACE,DOLLAR = map(Suppress,"(){}$")
>>> param = DOLLAR + Word(alphas) + DOLLAR
>>> funcCall = "food" + LPAR + delimitedList(param)("parameters") + RPAR + LBRACE
>>> for fn in funcCall.searchString(code):
...   print fn.parameters
...
['apples', 'oranges', 'pears', 'tomato']
['peanuts', 'popcorn', 'candybars', 'icecream']

... food($peanuts$, $popcorn$ ,/*$candybars$ ,*/$icecream$){

>>> funcCall.ignore(cStyleComment)

>>> for fn in funcCall.searchString(code):
...   print fn.parameters
...
['apples', 'oranges', 'pears', 'tomato']
['peanuts', 'popcorn', 'icecream']

for line in open("file"):
    line=line.rstrip()
    if line.lstrip().startswith("food") :
        for item in line.split(")"):
            if "food" in item:
                print item.split("(")[-1].split(",")

$ ./python.py
['$apples$ ', ' $oranges$ ', ' $pears$ ', ' $tomato$']

params = re.findall(r'\$([a-z]+)\$', programString)

food\((\$(?<parm>\w+)\$\s*,?\s*)+\).*