proposal: Go 2: looping with deferred condition as do while

[gocs]

for defer true {
}

This should work the same as:

do {
} while (true);

https://play.golang.org/p/mX8ZYqkygBL

for defer false {
    // runs once
}

for i := 0; defer i < 1; i++ {
    // runs once
    // i++ is also a deferred statement?
    // evaluate defer condition like LIFO
}

I was thinking of deferred conditions in general, but that is madness.

if defer false {
    // executes this block and neglects any else if
}

switch {
case defer true:
    // executes this block and neglects any else if
}

[jfesler]

This muddies the idea of when deferred functions are ran. Is it at the end of the function? Is it at the end of do/while? And I don't even know how to parse the intent on the if defer false or the switch mentioned above. Overloading "defer" like this would make code reviews painful.

If you really want your condition defined at the top of the loop, but executed at the end..

for ok := true; ok; ok = condition {
    // runs at least once
}

[griesemer]

From your examples it is unclear what you're trying to achieve here. Also, there doesn't seem to be much support for it. For these reason this is a likely-decline. Leaving open for 4 weeks for comments.

[ianlancetaylor]

No final comments.