1 files changed, 4 insertions, 0 deletions
diff --git a/src/util.h b/src/util.h
index 38d89f2..3e689eb 100644
--- a/src/util.h
+++ b/src/util.h
@@ -39,3 +39,7 @@ std::vector<std::string> argsplit(const std::string& str);
 //! Calls the system getenv and sets the string if the env name it exists.
 //! \returns true if the env name existed, false otherwise.
 bool get_env(std::string_view name, std::string& value);
+
+// helper type for the visitor
+template<class... Ts>
+struct overloaded : Ts... { using Ts::operator()...; };