30 std::string getWorkingDir();
31 std::vector<std::string> collectHeaders(const std::string& directory,
32                                         const std::unordered_set<std::string>& ignored_directories);
34 static inline std::string dirname(const std::string& path) {  in dirname()
35   std::unique_ptr<char, decltype(&free)> path_copy(strdup(path.c_str()), free);  in dirname()
39 static inline bool is_directory(const std::string& path) {  in is_directory()
47 static inline bool mkdirs(const std::string& path) {  in mkdirs()
52   std::string parent = dirname(path);  in mkdirs()
71 static inline std::string to_string(const char* c) {  in to_string()
75 static inline const std::string& to_string(const std::string& str) {  in to_string()
80 static inline std::string Join(Collection c, const std::string& delimiter = ", ") {
81   std::string result;
83     using namespace std;  variable