diff --git a/src/generator/config/subexport.cpp b/src/generator/config/subexport.cpp
index 66260c95a..8dcb27bc8 100644
--- a/src/generator/config/subexport.cpp
+++ b/src/generator/config/subexport.cpp
@@ -116,7 +116,7 @@ bool applyMatcher(const std::string &rule, std::string &real_rule, const Proxy &
     std::string target, ret_real_rule;
     static const std::string groupid_regex = R"(^!!(?:GROUPID|INSERT)=([\d\-+!,]+)(?:!!(.*))?$)", group_regex = R"(^!!(?:GROUP)=(.+?)(?:!!(.*))?$)";
     static const std::string type_regex = R"(^!!(?:TYPE)=(.+?)(?:!!(.*))?$)", port_regex = R"(^!!(?:PORT)=(.+?)(?:!!(.*))?$)", server_regex = R"(^!!(?:SERVER)=(.+?)(?:!!(.*))?$)";
-    static const string_array types = {"", "SS", "SSR", "VMESS", "TROJAN", "SNELL", "HTTP", "HTTPS", "SOCKS5"};
+    static const string_array types = {"", "SS", "SSR", "VMESS", "TROJAN", "SNELL", "HTTP", "HTTPS", "SOCKS5", "WIREGUARD"};
     if(startsWith(rule, "!!GROUP="))
     {
         regGetMatch(rule, group_regex, 3, 0, &target, &ret_real_rule);
@@ -155,7 +155,7 @@ bool applyMatcher(const std::string &rule, std::string &real_rule, const Proxy &
     return true;
 }
 
-void processRemark(std::string &remark, string_array &remarks_list, bool proc_comma = true)
+void processRemark(std::string &remark, const string_array &remarks_list, bool proc_comma = true)
 {
     // Replace every '=' with '-' in the remark string to avoid parse errors from the clients.
     //     Surge is tested to yield an error when handling '=' in the remark string, 
@@ -172,7 +172,7 @@ void processRemark(std::string &remark, string_array &remarks_list, bool proc_co
     }
     std::string tempRemark = remark;
     int cnt = 2;
-    while(std::find(remarks_list.begin(), remarks_list.end(), tempRemark) != remarks_list.end())
+    while(std::find(remarks_list.cbegin(), remarks_list.cend(), tempRemark) != remarks_list.cbegin())
     {
         tempRemark = remark + " " + std::to_string(cnt);
         cnt++;
diff --git a/src/utils/rapidjson_extra.h b/src/utils/rapidjson_extra.h
index c5fd5c2fe..67ee63719 100644
--- a/src/utils/rapidjson_extra.h
+++ b/src/utils/rapidjson_extra.h
@@ -93,6 +93,16 @@ namespace rapidjson_ext {
         {
             return (*this)(root);
         };
+
+        friend ReturnType operator| (rapidjson::Value &root, const ExtensionFunction<ReturnType> &func)
+        {
+            return func(root);
+        }
+
+        friend ReturnType operator| (rapidjson::Value &&root, const ExtensionFunction<ReturnType> &func)
+        {
+            return func(root);
+        }
     };
 
     struct AddMemberOrReplace : public ExtensionFunction<rapidjson::Value &> {
@@ -165,18 +175,6 @@ namespace rapidjson_ext {
             return buffer.GetString();
         }
     };
-
-    template <typename ReturnType>
-    inline ReturnType operator| (rapidjson::Value &root, const ExtensionFunction<ReturnType> &func)
-    {
-        return func(root);
-    }
-
-    template <typename ReturnType>
-    inline ReturnType operator| (rapidjson::Value &&root, const ExtensionFunction<ReturnType> &func)
-    {
-        return func(root);
-    }
 }
 
 
diff --git a/src/utils/stl_extra.h b/src/utils/stl_extra.h
index 6e14390cd..49c84c0ae 100644
--- a/src/utils/stl_extra.h
+++ b/src/utils/stl_extra.h
@@ -14,25 +14,37 @@ template <typename T> inline void eraseElements(T &target)
     T().swap(target);
 }
 
-template <typename Container, typename Element>
-concept ConstIterable = requires(Container a, Element b) {
+#if __cpp_concepts >= 201907L // C++20 concepts supported  (g++-10 or clang++-10)
+
+template <typename Container>
+concept ConstIterable = requires(Container a) {
     { a.cbegin() } -> std::same_as<typename Container::const_iterator>;
     { a.cend() } -> std::same_as<typename Container::const_iterator>;
     typename Container::const_reference;
 };
 
-template <typename Container, typename Element>
-concept Iterable = requires(Container a, Element b) {
+template <typename Container>
+concept Iterable = requires(Container a) {
     { a.begin() } -> std::same_as<typename Container::iterator>;
     { a.end() } -> std::same_as<typename Container::iterator>;
     typename Container::reference;
 };
 
 template <typename ConstIterableContainer>
-requires ConstIterable<ConstIterableContainer, typename ConstIterableContainer::value_type>
-inline bool none_of(ConstIterableContainer &container, std::function<bool(typename ConstIterableContainer::const_reference)> func)
+requires ConstIterable<ConstIterableContainer>
+inline bool none_of(const ConstIterableContainer &container, std::function<bool(typename ConstIterableContainer::const_reference)> func)
 {
     return std::none_of(container.cbegin(), container.cend(), func);
 }
 
+#else // __cpp_concepts >= 201907L
+
+template <typename Container>
+inline bool none_of(const Container &container, std::function<bool(typename Container::const_reference)> func)
+{
+    return std::none_of(container.cbegin(), container.cend(), func);
+}
+
+#endif // __cpp_concepts >= 201907L
+
 #endif // STL_EXTRA_H_INCLUDED