Checking the value of an Optional Bool

Question

When I want to check if an Optional Bool is true, doing this doesn\'t work:

var boolean : Bool? = false
if boolean{
}

It results in this error:

Answer 1

The answer I found most easy to read is to define a function. Not very complicated but does the work.

func isTrue(_ bool: Bool?) -> Bool {
    guard let b = bool else {
        return false
    }
    return b
}

usage:

let b: Bool? = true
if isTrue(b) {
    // b exists and is true
} else {
    // b does either not exist or is false
}