# coding=utf8
# the above tag defines encoding for this document and is for Python 2.x compatibility
import re
regex = r"^((struct *[a-z0-9_]+)|[a-z0-9_]+) *[*a-z0-9_]+\((void|((((struct *[a-z0-9_]+)|[a-z0-9_]+) *[*a-z0-9_]+)(, ((struct *[a-z0-9_]+)|[a-z0-9_]+) *[*a-z0-9_]+)*))\)"
test_str = ("int a_0(void)\n"
"int b_1(int a)\n"
"int c_2(int a, int b)\n\n"
"void *xmalloc(size_t n)\n\n"
"int main(int argc, char **argv)\n\n"
"void *xmalloc(size_t n)\n\n"
"void release(struct s_block)\n\n"
"int a_(int a, int b)\n"
"int main(void)\n\n"
"struct student get_student(char *name)\n"
"struct student *grow_2fast(struct student *s, int age_diff)\n"
"struct student *grow_2fast(struct student *s, struct hello age_diff)\n"
"int main(void)\n\n"
"int print_me(int h1)\n\n"
"/*\n"
"**int main(void)\n"
"*/")
matches = re.finditer(regex, test_str, re.MULTILINE)
for matchNum, match in enumerate(matches, start=1):
print ("Match {matchNum} was found at {start}-{end}: {match}".format(matchNum = matchNum, start = match.start(), end = match.end(), match = match.group()))
for groupNum in range(0, len(match.groups())):
groupNum = groupNum + 1
print ("Group {groupNum} found at {start}-{end}: {group}".format(groupNum = groupNum, start = match.start(groupNum), end = match.end(groupNum), group = match.group(groupNum)))
# Note: for Python 2.7 compatibility, use ur"" to prefix the regex and u"" to prefix the test string and substitution.
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html