aren't permitted). */#defineBUILD_BUG_ON_ZERO(e)(sizeof(struct{int:-!!(e);}))#defineBUILD_BUG_ON_NULL(e)((void*)sizeof(struct{int:-!!(e);})) 分析第一个,它表示的是:检查表达式e是否为0,为0编译通过且返回0;如果不为0,则编译不通过。 可能从这个宏的名字上看可能容易理解错,或者改...
可以看到BUILD_BUG_ON_ZERO(e)这个宏定义使用了sizeof运算符,这个运算符是会产生结果的,也就是说如果编译通过,这个宏定义会产生一个结果0,那么这个结果我们是不需要的,也是未使用的。所以BUILD_BUG_ON(condition)结果0的前面加了(void),这可以让某些编译器不产生未使用的警告,或者说有的时候我们是不需要0这个结...
BUILD_BUG_ON:只有条件condition为0时可编译,但不返回值,否则编译器报错。 BUILD_BUG_ON_ZERO:只有条件e为0时返回0,否则编译器报错。 总结:BUILD_BUG_ON和BUILD_BUG_ON_ZERO作用类似,都是在参数为非0时编译报错,但是BUILD_BUG_ON_ZERO可以返回0值,BUILD_BUG_ON不可。编译器警告的格式如下,这与char[-1]...
Zero Bug Build James World's blog for www.dotnetinsight.com Search Main menu Skip to primary content Skip to secondary content Home Quickly get a .gitignore file Posted onOctober 20, 2018 I posted a while back that like many people, I often usehttps://gitignore.ioto create gitignore ...
Zero Bug Build James World's blog for www.dotnetinsight.com Search Main menu Skip to primary content Skip to secondary content Home Post navigation ← Previous Next → ObserveLatestOn – A coalescing ObserveOn Posted on May 10, 2013 This is a problem that comes up when the UI ...
Problem description I'm getting errors when trying to build Android 10 for my F5121 smartphone. Help would be very much appreciated. (I must be doing something wrong...) Explain your steps Followed official build guide for Android 10 (ht...
Typical Type values include the following examples: “Bug”, “Issue”, and “Task”. Comment (String): You can add a comment to the history of the work item. CustomFields (IDictionary<TKey, TValue><String,String>): You can specify the value of one or more other fields of the work ...
please open a bug report with the information provided in "/usr/src/app/yarn-error.log". info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command. ls 1 error occurred: * Status: The command '/bin/sh -c yarn install' returned a non-zero code: 1, Code...
I have files a bug report using the official link they give inside the toolkit at http://feedbackssistnt.apple.com as it actually has an entry for the game porting toolkit. However, I don’t know if that will get any faster response on the issue. There doesn’t seem to be defacto...
对C语言开发的项目来说,BUILD_BUG_ON就是这么一个可以在编译期间检查代码静态约束的宏。 #defineBUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) BUILD_BUG_ON的原理如下: 当condition为false(0)时,由于1-2*!!(condition)为 1,宏被展开为sizeof(char[1]),这是合法语句,并且编译...