chore: import upstream snapshot with attribution

cpp/include/ray/api/msgpack_adaptor.h

@@ -0,0 +1,88 @@
+// Copyright 2023 The Ray Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <any>
+#include <msgpack.hpp>
+
+// TODO(Larry Lian) Adapt on windows
+#ifndef _WIN32
+
+namespace msgpack {
+namespace adaptor {
+
+template <>
+struct pack<std::any> {
+  template <typename Stream>
+  msgpack::packer<Stream> &operator()(msgpack::packer<Stream> &o,
+                                      const std::any &v) const {
+    const auto &any_type = v.type();
+    if (any_type == typeid(msgpack::type::nil_t)) {
+      o.pack(std::any_cast<msgpack::type::nil_t>(v));
+    } else if (any_type == typeid(bool)) {
+      o.pack(std::any_cast<bool>(v));
+    } else if (any_type == typeid(uint64_t)) {
+      o.pack(std::any_cast<uint64_t>(v));
+    } else if (any_type == typeid(int64_t)) {
+      o.pack(std::any_cast<int64_t>(v));
+    } else if (any_type == typeid(double)) {
+      o.pack(std::any_cast<double>(v));
+    } else if (any_type == typeid(std::string)) {
+      o.pack(std::any_cast<std::string>(v));
+    } else if (any_type == typeid(std::vector<char>)) {
+      o.pack(std::any_cast<std::vector<char>>(v));
+    } else {
+      throw msgpack::type_error();
+    }
+    return o;
+  }
+};
+
+template <>
+struct convert<std::any> {
+  msgpack::object const &operator()(msgpack::object const &o, std::any &v) const {
+    switch (o.type) {
+    case type::NIL:
+      v = o.as<msgpack::type::nil_t>();
+      break;
+    case type::BOOLEAN:
+      v = o.as<bool>();
+      break;
+    case type::POSITIVE_INTEGER:
+      v = o.as<uint64_t>();
+      break;
+    case type::NEGATIVE_INTEGER:
+      v = o.as<int64_t>();
+      break;
+    case type::FLOAT32:
+    case type::FLOAT64:
+      v = o.as<double>();
+      break;
+    case type::STR:
+      v = o.as<std::string>();
+      break;
+    case type::BIN:
+      v = o.as<std::vector<char>>();
+      break;
+    default:
+      throw msgpack::type_error();
+    }
+    return o;
+  }
+};
+
+}  // namespace adaptor
+}  // namespace msgpack
+#endif