chore: import upstream snapshot with attribution

paddle/ap/include/code_module/func_declare.h

@@ -0,0 +1,38 @@
+// 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/type.h"
+#include "paddle/ap/include/code_module/adt.h"
+#include "paddle/ap/include/code_module/arg_type.h"
+#include "paddle/ap/include/code_module/data_type.h"
+
+namespace ap::code_module {
+
+using FuncId = std::string;
+
+struct FuncDeclareImpl {
+  ArgType ret_type;
+  FuncId func_id;
+  adt::List<ArgType> arg_types;
+
+  bool operator==(const FuncDeclareImpl& other) const {
+    return other.func_id == this->func_id && other.ret_type == this->ret_type &&
+           other.arg_types == this->arg_types;
+  }
+};
+ADT_DEFINE_RC(FuncDeclare, FuncDeclareImpl);
+
+}  // namespace ap::code_module