How to break outer loops from inner structures that respond break (loops/switch)

Question

How to I break an outer loop from within an nested structure that responds to the break statement in Swift?

For example:

while someCondition {     if someOtherCondition {         switch (someValue) {             case 0:     // do something             case 1:     // exit loop             case 2...5: // do something else             default:    break         }     } else {         someCondition = false     } } 

The break will only get me out of the switch, and in Swift, it has to be used as empty cases are not allowed. How can I entirely exit the loop from within the switch?

Answer 1

Swift allows for labeled statements. Using a labeled statement, you can specify which which control structure you want to break from no matter how deeply you nest your loops (although, generally, less nesting is better from a readability standpoint). This also works for continue.

Example:

outerLoop: while someCondition {     if someOtherCondition {         switch (someValue) {             case 0:     // do something             case 1:     break outerLoop // exit loop             case 2...5: // do something else             default:    break         }     } else {         someCondition = false     } }