在断言中添加自定义消息? [英] Add custom messages in assert?

问题描述

有没有办法添加或编辑assert抛出的消息?我想使用类似

Is there a way to add or edit the message thrown by assert? I'd like to use something like

assert(a == b, "A must be equal to B");

然后，编译器添加line、time等等...

Then, the compiler adds line, time and so on...

有可能吗?

推荐答案

我见过的一个技巧是使用 && 操作符.由于指针在非空时为真"，您可以在不改变条件的情况下执行以下操作:

A hack I've seen around is to use the && operator. Since a pointer "is true" if it's non-null, you can do the following without altering the condition:

assert(a == b && "A is not equal to B");

由于 assert 显示失败的条件，它也会显示您的消息.如果这还不够，您可以编写自己的 myAssert 函数或宏来显示您想要的任何内容.

Since assert shows the condition that failed, it will display your message too. If it's not enough, you can write your own myAssert function or macro that will display whatever you want.

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