1 files changed, 16 insertions, 2 deletions
diff --git a/src/util.h b/src/util.h
index f8bcc0192c..23b2a787e4 100644
--- a/src/util.h
+++ b/src/util.h
@@ -276,12 +276,12 @@ public:
     /**
      * Get the help string
      */
-    std::string GetHelpMessage();
+    std::string GetHelpMessage() const;
 
     /**
      * Check whether we know of this arg
      */
-    bool IsArgKnown(const std::string& key, std::string& error);
+    bool IsArgKnown(const std::string& key) const;
 };
 
 extern ArgsManager gArgs;
@@ -355,4 +355,18 @@ std::string CopyrightHolders(const std::string& strPrefix);
  */
 int ScheduleBatchPriority(void);
 
+namespace util {
+
+//! Simplification of std insertion
+template <typename Tdst, typename Tsrc>
+inline void insert(Tdst& dst, const Tsrc& src) {
+    dst.insert(dst.begin(), src.begin(), src.end());
+}
+template <typename TsetT, typename Tsrc>
+inline void insert(std::set<TsetT>& dst, const Tsrc& src) {
+    dst.insert(src.begin(), src.end());
+}
+
+} // namespace util
+
 #endif // BITCOIN_UTIL_H