From e659dd58d602ec5fefac53dd996b69e11be1e790 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=EB=B0=95=EC=A2=85=ED=98=84/=EB=8F=99=EC=9E=91=EC=A0=9C?=
 =?utf8?q?=EC=96=B4Lab=28SR=29/Staff=20Engineer/=EC=82=BC=EC=84=B1?=
 =?utf8?q?=EC=A0=84=EC=9E=90?= <jh1302.park@samsung.com>
Date: Thu, 19 Jul 2018 08:25:32 +0900
Subject: [PATCH] [nest] Add 'AddNode' class (#701)

This commit adds 'AddNode' class under 'nest::expr' namespace, which
expressions the addition of two arithmetic values.

Signed-off-by: Jonghyun Park <jh1302.park@samsung.com>
---
 contrib/nest/include/nest/Expr.h         |  1 +
 contrib/nest/include/nest/expr/AddNode.h | 37 ++++++++++++++++++++++++++++++++
 contrib/nest/include/nest/expr/Node.def  |  1 +
 contrib/nest/src/expr/AddNode.test.cpp   | 27 +++++++++++++++++++++++
 4 files changed, 66 insertions(+)
 create mode 100644 contrib/nest/include/nest/expr/AddNode.h
 create mode 100644 contrib/nest/src/expr/AddNode.test.cpp

diff --git a/contrib/nest/include/nest/Expr.h b/contrib/nest/include/nest/Expr.h
index aef73b3..9fc09cb 100644
--- a/contrib/nest/include/nest/Expr.h
+++ b/contrib/nest/include/nest/Expr.h
@@ -6,6 +6,7 @@
 
 #include "nest/expr/VarNode.h"
 #include "nest/expr/DerefNode.h"
+#include "nest/expr/AddNode.h"
 
 #include <memory>
 
diff --git a/contrib/nest/include/nest/expr/AddNode.h b/contrib/nest/include/nest/expr/AddNode.h
new file mode 100644
index 0000000..b15d344
--- /dev/null
+++ b/contrib/nest/include/nest/expr/AddNode.h
@@ -0,0 +1,37 @@
+#ifndef __NEST_EXPR_ADD_NODE_H__
+#define __NEST_EXPR_ADD_NODE_H__
+
+#include "nest/expr/Node.h"
+
+#include <memory>
+
+namespace nest
+{
+namespace expr
+{
+
+class AddNode final : public Node
+{
+public:
+  AddNode(const std::shared_ptr<expr::Node> &lhs, const std::shared_ptr<expr::Node> &rhs)
+      : _lhs{lhs}, _rhs{rhs}
+  {
+    // DO NOTHING
+  }
+
+public:
+  const AddNode *asAdd(void) const override { return this; }
+
+public:
+  const std::shared_ptr<expr::Node> &lhs(void) const { return _lhs; }
+  const std::shared_ptr<expr::Node> &rhs(void) const { return _rhs; }
+
+private:
+  std::shared_ptr<expr::Node> const _lhs;
+  std::shared_ptr<expr::Node> const _rhs;
+};
+
+} // namespace expr
+} // namespace nest
+
+#endif // __NEST_EXPR_ADD_NODE_H__
diff --git a/contrib/nest/include/nest/expr/Node.def b/contrib/nest/include/nest/expr/Node.def
index 1c4dd21..baf9aaa 100644
--- a/contrib/nest/include/nest/expr/Node.def
+++ b/contrib/nest/include/nest/expr/Node.def
@@ -5,3 +5,4 @@
 // EXPR(Tag)
 EXPR(Var)
 EXPR(Deref)
+EXPR(Add)
diff --git a/contrib/nest/src/expr/AddNode.test.cpp b/contrib/nest/src/expr/AddNode.test.cpp
new file mode 100644
index 0000000..0b2c778
--- /dev/null
+++ b/contrib/nest/src/expr/AddNode.test.cpp
@@ -0,0 +1,27 @@
+#include "nest/expr/AddNode.h"
+
+#include <memory>
+
+#include <gtest/gtest.h>
+
+namespace
+{
+struct DummyNode final : public nest::expr::Node
+{
+};
+}
+
+TEST(ADD_NODE, cast)
+{
+  auto left = std::make_shared<DummyNode>();
+  auto right = std::make_shared<DummyNode>();
+
+  auto derived = std::make_shared<nest::expr::AddNode>(left, right);
+  std::shared_ptr<nest::expr::Node> base = derived;
+
+  ASSERT_NE(derived.get(), nullptr);
+  ASSERT_EQ(base->asAdd(), derived.get());
+
+  ASSERT_EQ(derived->lhs().get(), left.get());
+  ASSERT_EQ(derived->rhs().get(), right.get());
+}
-- 
2.7.4