chore: import upstream snapshot with attribution

paddle/ap/include/axpr/packed_args_method_class.h

@@ -0,0 +1,54 @@
+// Copyright (c) 2024 PaddlePaddle Authors. All Rights Reserved.
+//
+// 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 "paddle/ap/include/adt/adt.h"
+#include "paddle/ap/include/axpr/method_class.h"
+#include "paddle/ap/include/axpr/packed_args.h"
+
+namespace ap::axpr {
+
+template <typename ValueT>
+struct MethodClassImpl<ValueT, PackedArgs<ValueT>> {};
+
+template <typename ValueT>
+struct MethodClassImpl<ValueT, TypeImpl<PackedArgs<ValueT>>> {
+  using This = MethodClassImpl<ValueT, TypeImpl<PackedArgs<ValueT>>>;
+  using Self = TypeImpl<PackedArgs<ValueT>>;
+  adt::Result<ValueT> Call(const Self& self) { return &This::Construct; }
+
+  static adt::Result<ValueT> Construct(const ValueT&,
+                                       const std::vector<ValueT>& args) {
+    return This{}.Make(args);
+  }
+
+  adt::Result<ValueT> Make(const std::vector<ValueT>& args) {
+    ADT_CHECK(args.size() == 2);
+    ADT_LET_CONST_REF(positional_args,
+                      TryGetImpl<adt::List<ValueT>>(args.at(0)));
+    ADT_LET_CONST_REF(keyword_args_val,
+                      TryGetImpl<adt::List<ValueT>>(args.at(1)));
+    axpr::AttrMap<ValueT> keyword_args;
+    for (const auto& pair_val : *keyword_args_val) {
+      ADT_LET_CONST_REF(pair, TryGetImpl<adt::List<ValueT>>(pair_val));
+      ADT_CHECK(pair->size() == 2);
+      ADT_LET_CONST_REF(key, TryGetImpl<std::string>(pair->at(0)));
+      keyword_args->Set(key, pair->at(1));
+    }
+    return PackedArgs<ValueT>{positional_args, keyword_args};
+  }
+};
+
+}  // namespace ap::axpr