chore: import upstream snapshot with attribution

paddle/pir/include/core/dialect_interface.h

@@ -0,0 +1,67 @@
+// Copyright (c) 2023 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/pir/include/core/type_id.h"
+
+namespace pir {
+class Dialect;
+class IrContext;
+///
+/// \brief DialectInterface
+///
+template <typename ConcreteType, typename BaseT>
+class DialectInterfaceBase : public BaseT {
+ public:
+  using Base = DialectInterfaceBase<ConcreteType, BaseT>;
+
+  /// Get a unique id for the derived interface type.
+  static TypeId id() { return TypeId::get<ConcreteType>(); }
+
+ protected:
+  explicit DialectInterfaceBase(Dialect *dialect) : BaseT(dialect, id()) {}
+};
+
+class IR_API DialectInterface {
+ public:
+  virtual ~DialectInterface();
+
+  /// The base class used for all derived interface types. This class provides
+  /// utilities necessary for registration.
+  template <typename ConcreteType>
+  using Base = DialectInterfaceBase<ConcreteType, DialectInterface>;
+
+  /// Return the dialect that this interface represents.
+  Dialect *dialect() const { return dialect_; }
+
+  /// Return the context that holds the parent dialect of this interface.
+  IrContext *ir_context() const;
+
+  /// Return the derived interface id.
+  TypeId interface_id() const { return interface_id_; }
+
+ protected:
+  DialectInterface(Dialect *dialect, TypeId id)
+      : dialect_(dialect), interface_id_(id) {}
+
+ private:
+  /// The dialect that represents this interface.
+  Dialect *dialect_;
+
+  /// The unique identifier for the derived interface type.
+  TypeId interface_id_;
+};
+
+}  // namespace pir