声明参考并稍后初始化？ [英] Declare a reference and initialize later?

问题描述

我引用了 MyOjbect ，但是确切的对象取决于条件。所以我想做这样的事情：

I have a reference to MyOjbect, but the the exact object depends on a condition. So I want to do something like this:

MyObject& ref; 
if([condition]) 
  ref = MyObject([something]) 
else 
  ref = MyObject([something else]);

我现在无法执行此操作，因为编译器不允许我声明但不能初始化引用。我该怎么办才能达到我的目标？

I cannot do this right now because the compiler does not allow me to declare but not initialize a reference. What can I do to achieve my goal here?

推荐答案

您需要对其进行初始化。但是，如果您希望有条件地对其进行初始化，则可以执行以下操作：

You need to initliaze it. But if you would like to conditionally initialize it, you can do something like this:

MyObject& ref = (condition) ? MyObject([something]) : MyObject([something else]);

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