Initializer list
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（为了不被混淆性病的初始）
他们的一部分，它负责成员和祖先初始化的构造函数
原文：
They are the part of a constructor which is responsible for member and ancestor initialization
[编辑] 语法
constructor_signature : member_constructor_calls { constructor_body }
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[编辑] 解释
初始化列表中初始化的对象应该出现的地方，是基类的构造函数和成员被称为.
原文：
The initializer list is the place where initialization of the object should occur, there is where the constructors for base classes and members are called.
成员被初始化以相同的顺序，它们被声明，而不是像在初始化列表中出现.
原文：
Members are initialized in the same order as they are declared, not as they appear in the initializer list.
如果一个参数的构造函数中具有相同名称的成员之一，该标识符的模糊性，通过在构造函数中调用内的intializer列表选择参数（而不是成员）解决.
原文：
If a parameter in the constructor has the same name as one of the members, the ambiguity of that identifier being passed in a constructor call inside the intializer list is resolved choosing the parameter (and not the member).
成员或基类中不存在该列表中的缺省构造
原文：
Members or base classes not present in the list will be default constructed
[编辑] 为例
struct Class : public Base { int x; int y; Class ( int x ) : Base ( 123 ), // initialize base class x ( x ), // x (member) is initialized with x (parameter) y ( 0 ) // y initialized to 0 {} // empty constructor body Class ( double a ) : y ( a+1 ), x ( y ) // x will be initialized before y, this means that its value here is undefined {} // No base class constructor in list, this is the same as calling Base() Class() try : Base ( 789 ), x ( 0 ), y ( 0 ) { // no exception } catch (...) { // exception occurred on initialization } };
