1 files changed, 100 insertions, 0 deletions
diff --git a/compiler/nnc/include/pass/PassData.h b/compiler/nnc/include/pass/PassData.h
new file mode 100644
index 000000000..e2c0b8129
--- /dev/null
+++ b/compiler/nnc/include/pass/PassData.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2018 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 NNCC_PASSDATA_H
+#define NNCC_PASSDATA_H
+
+#include "mir/Graph.h"
+#include "mir/TensorVariant.h"
+
+namespace nnc
+{
+
+/**
+ * @brief class that encapsulate value returned and taken by pass
+ */
+class PassData
+{
+public:
+  /* implicit */ PassData(std::nullptr_t data)
+      : // NOLINT(google-explicit-constructor, hicpp-explicit-conversions)
+        _dataContainer{.unknown = data},
+        _dataType(PDT::UNKNOWN)
+  {
+  }
+
+  /**
+   * @brief Implicit conversion from Graph* to PassData
+   */
+  /* implicit */ PassData(mir::Graph *graph)
+      : // NOLINT(google-explicit-constructor, hicpp-explicit-conversions)
+        _dataContainer{.graph = graph},
+        _dataType(PDT::GRAPH)
+  {
+  }
+
+  /**
+   * @brief Implicit conversion from PassData to Graph*
+   */
+  /* implicit */ operator mir::Graph *() const
+  { // NOLINT(google-explicit-constructor, hicpp-explicit-conversions)
+    if (_dataType != PDT::GRAPH)
+      return nullptr;
+    return _dataContainer.graph;
+  }
+
+  /**
+   * @brief Implicit conversion from Graph* to PassData
+   */
+  /* implicit */ PassData(mir::TensorVariant *tv)
+      : // NOLINT(google-explicit-constructor, hicpp-explicit-conversions)
+        _dataContainer{.tensorVariant = tv},
+        _dataType(PDT::TENSOR_VARIANT)
+  {
+  }
+
+  /**
+   * @brief Implicit conversion from PassData to Graph*
+   */
+  /* implicit */ operator mir::TensorVariant *() const
+  { // NOLINT(google-explicit-constructor, hicpp-explicit-conversions)
+    if (_dataType != PDT::TENSOR_VARIANT)
+      return nullptr;
+    return _dataContainer.tensorVariant;
+  }
+
+private:
+  // types that PassData can contain
+  enum class PDT : char
+  {
+    GRAPH,
+    TENSOR_VARIANT,
+    UNKNOWN
+
+  } _dataType;
+
+  // union contains all pointers to objects that can be returned from passes
+  union {
+    mir::Graph *graph;
+    mir::TensorVariant *tensorVariant;
+    void *unknown;
+
+  } _dataContainer;
+};
+
+} // namespace nnc
+
+#endif // NNCC_PASSDATA_H