使用等式RHS中的值后改变布尔值？(Change boolean after using value in RHS of equation?)

使用等式RHS中的值后改变布尔值？(Change boolean after using value in RHS of equation?)

我不确定是否有办法做到这一点，但我认为这是最好的地方。

我希望在使用它之后立即更改布尔值（或之前，只需要语义更改），但是在同一行中。 预期效果与此代码相同：

bool flag, tempFlag; //whatever names ... tempFlag = flag; flag = !flag;

但我想知道是否有一种速记方式，只需一行即可。 有点像tempFlag = flag!; ：P

例如，您可以在单行中使用其值后立即更改int的值，如下所示：

int x = y++;

是否有一种简短的方式来编写这样的动作？

我的具体问题是在C＃，但我很好奇，如果任何其他流行的语言有这样的方式。

I'm not sure if there's even a way to do it, but I figure this is the best place to ask.

I want to change a boolean's value immediately after using it (or before, would only require a semantic change), but in the same line. The intended effect would be the same as this code:

bool flag, tempFlag; //whatever names ... tempFlag = flag; flag = !flag;

But I was wondering if there's a shorthand way of doing that, in a single line. Something like tempFlag = flag!; :P

For example, you can change the value of an int immediately after using its value in a single line, as in:

int x = y++;

Is there a short way of writing such an action?

My specific problem is in C#, but I am curious if any other popular language has such a way.

最满意答案

tempFlag = !(flag = !flag);

应该使用所有提到的语言。 flag = !flag返回新值，然后再次反转并放入tempflag 。 但正如NathanOliver所说，我认为没有必要做这样的事情。 如果你想要它是线程安全的（这是我能想象的唯一这样的应用程序，我甚至不确定它是否可行）使用线程锁来实现它。

tempFlag = !(flag = !flag);

should work in all mentioned languages. flag = !flag returns the new value, which is then inverted again and put into tempflag. But as NathanOliver mentioned, I see no need to do something like this. If you want it to be threadsafe (which is the only application I can imagine for something like this, and I'm not even sure if it would work) use a thread lock to make it so.