Ydb stable 23-1-1923.1.19

x-stable-origin-commit: c5d5a396e89d0a72e0267a55e93d8404d4fb54fe

1 files changed, 18 insertions, 0 deletions

diff --git a/library/cpp/unified_agent_client/variant.h b/library/cpp/unified_agent_client/variant.h
new file mode 100644
index 00000000000..e261aa9af39
--- /dev/null
+++ b/library/cpp/unified_agent_client/variant.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <variant>
+
+namespace NUnifiedAgent {
+    template<class... Ts> struct TOverloaded : Ts... { using Ts::operator()...; };
+    template<class... Ts> TOverloaded(Ts...) -> TOverloaded<Ts...>;
+
+    template <class T, class... U>
+    auto Visit(T&& variant, U&&... visitorOverloads) {
+        return std::visit(TOverloaded{std::forward<U>(visitorOverloads)...}, std::forward<T>(variant));
+    }
+
+    template <typename TTarget, typename... TSourceTypes>
+    auto CastTo(std::variant<TSourceTypes...>&& variant) {
+        return Visit(variant, [](auto& p) -> TTarget { return std::move(p); });
+    }
+}