C++如果 switch 失败则内联
我刚刚发现内联 if (A?B:C) 在 switch 语句中不能按预期工作。
其中 A 是布尔值，B 和 C 都是不等于 0 的整数。当放置在开关内时，该语句的结果是 0。
我找到了一篇 stackoverflow 帖子 [1]，其中提到了这种行为，但我找不到任何解释为什么这不能按我的预期工作。是什么原因造成的？
例如：
int foo = 6;
switch(foo)
{
case 6:
return 10 + true ? 2 : 4;
}
[1] C++ 中内联函数的好处？
I just found out the hard way an inline if (A?B:C) does not work as expected in a switch statement.
where A a boolean, B and C both integer unequal to 0. The result of this statement is 0 when placed inside a switch.
I found a stackoverflow post [1] where this behaviour was mentioned but I can not find any explanation why this doesn't work as I would expect. What is causing this?
For example:
int foo = 6;
switch(foo)
{
case 6:
return 10 + true ? 2 : 4;
}
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这与
switch无关。相当于：
如果你希望它的行为像：
那么你需要这样写。
This is nothing to do with
switch.is equivalent to:
If you want it to act like:
then you will need to write it like that.