From fcda23a3e4a336a4d69376af240f0a6bd3d0d546 Mon Sep 17 00:00:00 2001
From: Xin Pan <panxin.grad@gmail.com>
Date: Tue, 10 Jul 2018 19:45:27 +0800
Subject: [PATCH] simple node

---
 paddle/fluid/framework/ir/node.h | 42 +++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/paddle/fluid/framework/ir/node.h b/paddle/fluid/framework/ir/node.h
index 6f4bb172c6..0c52127069 100644
--- a/paddle/fluid/framework/ir/node.h
+++ b/paddle/fluid/framework/ir/node.h
@@ -14,6 +14,46 @@ limitations under the License. */
 
 #pragma once
 
+#include <cstdint>
+#include <string>
+#include <vector>
+#include "paddle/fluid/platform/macros.h"
+
 namespace paddle {
-namespace framework {}  // namespace framework
+namespace framework {
+
+class Node {
+ public:
+  enum class Type { kNone = -1, kOperation, kVariable };
+
+  Node() {}
+  virtual ~Node() {}
+
+  template <typename Subclass>
+  Subclass &As() {
+    return *dynamic_cast<Subclass *>(this);
+  }
+
+  int64_t ID() const { return id_; }
+
+  std::string Name() const { return name_; }
+
+  virtual std::string ToString() const {
+    return Name() + "(" + std::to_string(ID()) + ")";
+  }
+
+  Type NodeType() const { return type_; }
+
+  std::vector<Node *> inputs;
+  std::vector<Node *> outputs;
+
+ protected:
+  int64_t id_ = 0;
+  std::string name_;
+  Type type_;
+
+  DISABLE_COPY_AND_ASSIGN(Node);
+};
+
+}  // namespace framework
 }  // namespace paddle
-- 
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