From e2ef8438a24f7c56a0744eb579a6e293ee2fbf8e Mon Sep 17 00:00:00 2001
From: Chunseok Lee <chunseok.lee@samsung.com>
Date: Thu, 23 Apr 2020 14:45:49 +0900
Subject: Imported Upstream version 1.4.0

---
 compiler/loco/include/loco/IR/NodeMixins.h | 133 +++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 compiler/loco/include/loco/IR/NodeMixins.h

(limited to 'compiler/loco/include/loco/IR/NodeMixins.h')

diff --git a/compiler/loco/include/loco/IR/NodeMixins.h b/compiler/loco/include/loco/IR/NodeMixins.h
new file mode 100644
index 000000000..f0e34b0ba
--- /dev/null
+++ b/compiler/loco/include/loco/IR/NodeMixins.h
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. 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.
+ */
+
+#ifndef __LOCO_IR_NODE_MIXINS_H__
+#define __LOCO_IR_NODE_MIXINS_H__
+
+#include "loco/IR/Node.h"
+#include "loco/IR/DataType.h"
+#include "loco/IR/Dimension.h"
+
+#include <vector>
+#include <initializer_list>
+
+namespace loco
+{
+
+enum class NodeTrait
+{
+  DataType,
+  // Nodes with TensorShape trait will provide the following methods:
+  // - rank()
+  // - rank(value)
+  // - dim()
+  // - dim(value)
+  // - shape({...})
+  TensorShape,
+};
+
+template <NodeTrait T> class NodeMixin;
+
+template <> class NodeMixin<NodeTrait::DataType>
+{
+public:
+  NodeMixin() = default;
+
+public:
+  const DataType &dtype(void) const { return _dtype; }
+  void dtype(const DataType &dtype) { _dtype = dtype; }
+
+private:
+  /// @brief Data type
+  DataType _dtype{DataType::Unknown};
+};
+
+template <> class NodeMixin<NodeTrait::TensorShape>
+{
+public:
+  NodeMixin() = default;
+
+public:
+  uint32_t rank(void) const { return _dims.size(); }
+  void rank(uint32_t value) { _dims.resize(value); }
+
+  const Dimension &dim(uint32_t axis) const { return _dims.at(axis); }
+  Dimension &dim(uint32_t axis) { return _dims.at(axis); }
+
+  void shape(std::initializer_list<uint32_t> dims)
+  {
+    rank(dims.size());
+
+    uint32_t axis = 0;
+    for (auto d : dims)
+    {
+      dim(axis++) = d;
+    }
+  }
+
+private:
+  /// @brief Data shape (as tensor)
+  std::vector<Dimension> _dims;
+};
+
+template <unsigned N> struct FixedArity
+{
+  template <typename Base> class Mixin : public virtual Base
+  {
+  public:
+    Mixin()
+    {
+      for (uint32_t n = 0; n < N; ++n)
+      {
+        _args[n] = std::unique_ptr<Use>{new Use{this}};
+      }
+    }
+
+    virtual ~Mixin() = default;
+
+  public:
+    unsigned arity(void) const final { return N; }
+
+    Node *arg(uint32_t n) const final { return _args.at(n)->node(); }
+
+    void drop(void) final
+    {
+      for (uint32_t n = 0; n < N; ++n)
+      {
+        _args.at(n)->node(nullptr);
+      }
+    }
+
+  protected:
+    // This API allows inherited classes to access "_args" field.
+    Use *at(unsigned n) const { return _args.at(n).get(); }
+
+  private:
+    std::array<std::unique_ptr<Use>, N> _args{};
+  };
+};
+
+template <NodeTrait Trait> struct With
+{
+  template <typename Base> struct Mixin : public virtual Base, public NodeMixin<Trait>
+  {
+    // DO NOTHING
+  };
+};
+
+} // namespace loco
+
+#endif // __LOCO_IR_NODE_MIXINS_H__
-- 
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