From 61e71a4f3033778004c633f734da5bd4d93ce813 Mon Sep 17 00:00:00 2001
From: johnwdjiang <johnwdjiang@tencent.com>
Date: Tue, 13 Oct 2020 21:13:53 +0800
Subject: [PATCH] add list

---
 .../item25.md                                 | 30 +++++++++++++++++++
 .../item26.md                                 |  0
 .../item27.md                                 |  0
 .../item28.md                                 |  0
 .../item30.md                                 |  0
 5 files changed, 30 insertions(+)
 create mode 100644 5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item25.md
 create mode 100644 5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item26.md
 create mode 100644 5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item27.md
 create mode 100644 5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item28.md
 create mode 100644 5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item30.md

diff --git a/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item25.md b/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item25.md
new file mode 100644
index 0000000..afe1a2e
--- /dev/null
+++ b/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item25.md
@@ -0,0 +1,30 @@
+## Item25: 在右值引用上使用`std::move`，在通用引用上使用`std::forward`
+
+右值引用仅绑定可以移动的对象。如果你有一个右值引用参数，你就知道这个对象可能会被移动：
+
+```cpp
+class Widget {
+  Widget(Widget&& rhs); //rhs definitely refers to an object eligible for moving
+  ...
+};
+```
+
+这是个例子，你将希望通过可以利用该对象右值性的方式传递给其他使用对象的函数。这样做的方法是将绑定次类对象的参数转换为右值。如Item23中所述，这不仅是`std::move`所做，而且是为它创建：
+
+```cpp
+class Widget {
+public:
+  Widget(Widget&& rhs) :name(std::move(rhs.name)), p(std::move(rhs.p)) {...}
+  ...
+private:
+  std::string name;
+  std::shared_ptr<SomeDataStructure> p;
+};
+```
+
+另一方面（查看Item24），通用引用可能绑定到有资格移动的对象上。通用引用使用右值初始化时，才将其强制转换为右值。Item23阐释了这正是`std::forward`所做的：
+
+```cpp
+
+```
+
diff --git a/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item26.md b/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item26.md
new file mode 100644
index 0000000..e69de29
diff --git a/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item27.md b/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item27.md
new file mode 100644
index 0000000..e69de29
diff --git a/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item28.md b/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item28.md
new file mode 100644
index 0000000..e69de29
diff --git a/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item30.md b/5.RvalueReferences_MovingSemantics_And_PerfectForwarding/item30.md
new file mode 100644
index 0000000..e69de29