Here is a contrived reduction of my problem
func mainFunction(closure:(Int) -> Int) -> Int {
func closureDoubled(_ n: Int) -> Int {
let result = closure(n)
return 2*result
}
let temp1 = closure(1)
let temp2 = closureDoubled(1)
return temp1+temp2
}
The line "let result = closure(n)" is refused by the compiler with the
error message "declaration over non closing parameter may allow it to
escape".
First off, while I know what an escaping or a non-escaping closure is, I
find this error message utterly impossible to understand. To begin with,
the sentence "non closing parameter" is meaningless to me.
In any case, my main function is passed a non-escaping closure. I want to
call it from inside it, the compiler is ok with. I want also to call it
from a nested function, but the compiler disagrees.
I believe the compiler should not complain here. Did I miss anything?
Jean-Denis
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