prepare for c++17

code/2/2.5.cpp

@@ -0,0 +1,34 @@
+//
+// 2.5.cpp
+// c++1x tutorial
+//
+// created by changkun at shiyanlou.com
+//
+// 初始化列表
+
+
+#include <initializer_list>
+
+class Foo {
+private:
+    int value;
+public:
+    Foo(int) {}
+};
+
+class Magic {
+public:
+    Magic(std::initializer_list<int> list) {}
+};
+
+void func(std::initializer_list<int> list) {
+    return;
+}
+
+int main() {
+    int arr[3] = {1,2,3};       // 列表初始化
+    Foo foo(1);                 // 普通构造初始化
+    
+    Magic magic = {1,2,3,4,5};  // 使用 initialize_list
+    func({1,2,3});
+}