201718

2022-11-18 14:50:42 -08:00
parent 4d4dfb4424
commit 8f772d85b2
5 changed files with 239 additions and 3 deletions
--- a/lib/include/aocpp/Overloaded.hpp
+++ b/lib/include/aocpp/Overloaded.hpp
@@ -0,0 +1,9 @@
+#ifndef AOCPP_OVERLOADED_HPP_
+#define AOCPP_OVERLOADED_HPP_
+
+// helper type for the visitor #4
+template<class... Ts> struct overloaded : Ts... { using Ts::operator()...; };
+// explicit deduction guide (not needed as of C++20)
+template<class... Ts> overloaded(Ts...) -> overloaded<Ts...>;
+
+#endif // AOCPP_OVERLOADED_HPP_