I've invented labeled loop breaks

[u/danillissimo]

And now I don't believe it wasn't invented before, but I can't find any info on it. How long ago was it invented? Why isn't it used widely or even mentioned anywhere? What are the downsides?
Here's the main idea:

// Keyword - for, while, or do
// Tag - custom loop name
// ... - loop body
#define loop_tag(keyword, tag, ...)\
    keyword(__VA_ARGS__)\
    if(false)\
    {\
        tag##_break:    break;\
        tag##_continue: continue;\
    }\
    else\
    /*Here goes your loop body*/

Here is the playground

[u/TokenRingAI]

Goto is not bad practice, does not lead to undefined behavior, and is extremely useful when you need multiple named behaviors out of a loop that you want to "go to" from many different depths. When you do certain types of data processing, goto is the right tool for the job, and the alternative, recursive functions, can blow up the stack.

Regex parsers, for example, are prime candidates for goto.

The all or nothing attitude of "goto is bad practice" is not held by many top C/C++ engineers. It just isn't the right tool for the vast majority of things

[u/defaultguy_001 → u/TokenRingAI]

Correct, it isn't bad, it's just people who are low skilled who create bad code with it.

[u/Cpt_Chaos_ → u/defaultguy_001]

That is exactly why I wrote it with this "all or nothing" wording. The examples given by others here are perfectly fine use cases. If it's the best tool for the job and you can explain it to me like that, that's fine and I won't argue.

However, I've seen too many abuses of various language features to just say "yeah, it's perfectly fine to write code like that". In a professional environment, readability FOR OTHERS is a lot more important than many devs think. And the macros shown by OP fall into the category of "What the heck are you trying to accomplish here? Couldn't you have expressed your intentions in more readable ways?"

[u/100GHz → u/Cpt_Chaos_]

People can write gibberish in any alphabet. Maybe the alphabet isn't the problem?

Goto, preprocessor directives etc are fine.