int main()
{
// Simple regular expression matching
std::string fnames[] = {"foo.txt", "bar.txt", "baz.dat", "zoidberg"};
std::regex txt_regex("[a-z]+\\.txt");
for (const auto &fname : fnames) {
std::cout << fname << ": "
<< std::regex_match(fname, txt_regex) << '\n';
}
// Extraction of a sub-match
std::regex base_regex("([a-z]+)\\.txt");
std::smatch base_match;
for (const auto &fname : fnames) {
if (std::regex_match(fname, base_match, base_regex)) {
// The first sub_match is the whole string; the next
// sub_match is the first parenthesized expression.
if (base_match.size() == 2) {
std::ssub_match base_sub_match = base_match[1];
std::string base = base_sub_match.str();
std::cout << fname << " has a base of " << base << '\n';
}
}
}
// Extraction of several sub-matches
std::regex pieces_regex("([a-z]+)\\.([a-z]+)");
std::smatch pieces_match;
for (const auto &fname : fnames) {
if (std::regex_match(fname, pieces_match, pieces_regex)) {
std::cout << fname << '\n';
for (size_t i = 0; i < pieces_match.size(); ++i) {
std::ssub_match sub_match = pieces_match[i];
std::string piece = sub_match.str();
std::cout << " submatch " << i << ": " << piece << '\n';
}
}
}
}
std::string extract_labels(const std::string& code)
{
std::string res_string;
try
{
std::regex pieces_regex("_set_goto_label\\(([^\\)]+)");
std::smatch pieces_match;
std::string::const_iterator SearchStart( code.cbegin() );
std::vector<std::string> result_array;
while(std::regex_search(SearchStart, code.cend(), pieces_match, pieces_regex))
{
std::ssub_match sub_match = pieces_match[1];
std::string piece = sub_match.str();
picojson::value val;
picojson::parse(val,piece);
result_array.push_back(val.get<std::string>());
SearchStart += pieces_match.position() + pieces_match.length();
}
std::sort(result_array.begin(),result_array.end());
result_array.erase(std::unique(result_array.begin(), result_array.end()), result_array.end());
picojson::array json_array;
for(std::string s:result_array)
{
picojson::value::object res;
res["name"] = picojson::value(s);
json_array.push_back(picojson::value(res));
}
res_string = picojson::value(json_array).serialize();
WORKER_LOG(std::string("extract_labels<<") + res_string);
}catch(...)
{
}
return res_string;
}