fileop::join now support multiple input

fileop.cpp

@@ -294,6 +294,18 @@ std::string fileop::join(std::string path, std::string path2) {
 #endif
 }
 
+std::string fileop::join(std::initializer_list<std::string> paths) {
+    std::string path;
+    for (auto it = paths.begin(); it != paths.end(); it++) {
+        if (it == paths.begin()) {
+            path = *it;
+        } else {
+            path = join(path, *it);
+        }
+    }
+    return path;
+}
+
 bool fileop::isdir(std::string path, bool& result) {
     if (!exists(path)) {
         result = false;

fileop.h

@@ -69,6 +69,22 @@ namespace fileop {
      * @return result
     */
     std::string join(std::string path, std::string path2);
+    /**
+     * @brief Join multiple pathname components
+     * @param paths List of pathname components
+     * @return Joined path string
+    */
+    std::string join(std::initializer_list<std::string> paths);
+    /**
+     * @brief Join multiple pathname components (variadic template version)
+     * @tparam Args Additional pathname component types
+     * @param paths All pathname components
+     * @return Joined path string
+    */
+    template<typename... Args>
+    std::string join(Args... paths) {
+        return join({std::forward<Args>(paths)...});
+    }
     /**
      * @brief check if path is an existing directory.
      * @param path Path