I just bumped into some strange unexpected errors that took me a while to understand. The situation can be simplified as follows.
This program compiles (as expected):
func foo() {
do {
print("A")
}
print("B")
while true {
print("C")
break
}
}
Removing print("B") will result in three (unexpected and nonsensical) compile time errors:
func foo() {
do { // ERROR: 'do-while' statement is not allowed; use 'repeat-while' instead
print("A")
}
while true { // ERROR: Closure expression is unused
print("C")
break // ERROR: break' is only allowed inside a loop, if, do, or switch
}
}
I guess the first error was introduced to aid migration from Swift's old do-while loop to the current repeat-while loop, but that was a long time ago, so perhaps it's time to let the latter version of the program compile now?