[ruby-core:79601] [Ruby trunk Misc#13230] Better Do ... while structure

Issue #13230 has been reported by Jabari Zakiya.

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Misc #13230: Better Do ... while structure
https://bugs.ruby-lang.org/issues/13230

* Author: Jabari Zakiya
* Status: Open
* Priority: Normal
* Assignee: 
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I just saw this, and thought I'd pass it along.

http://ncomputers.org/suggestions/do%20while.cpp

```
Do ... while structure improvement
Sometimes the use of jumps such as: continue, break, goto, call to a function, etc. is necessary to avoid the execution of some instructions.

This is the case of the seed, warp and swap loops of this solution for the n queens problem.

To avoid the use of jumps or tricks like for(;;) if(condition)break; on some of these cases, we are suggesting the below improvement to the do ... while loop str


/* author: ncomputers.org */
int main(){
    // Allow initializers (extra improvement)
    do(bool condition=0){
        // Block A
    }while(condition){
        // Block B
        // Variables declared inside the initializer still visible
    }
    return 0;
}
```



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