P. 177: Text uses undocumented initializer for NSPredicate

In the last example on p. 177, there is this line:

if let compoundPredicate = NSPredicate(format: formatString, someName) { ... }

  1. The NSPredicate docs do not list any such initializer for Swift.

  2. In a playground, this code:

[code]let formatString = "name like[c] %@ and raise > 0.0"
var someName = “Joe”

if let predicate = NSPredicate(format: formatString, someName) {
println(“hello”)
}[/code]

produces an error:

I interpret that to mean that the undocumented initializer does not return an Optional type, so using if-let is inappropriate.

And in fact, when I get rid of the if-let:

[code]let formatString = "name like[c] %@ and raise > 0.0"
var someName = “Joe”

let predicate = NSPredicate(format: formatString, someName) {
println(“hello”)
}
[/code]

I get the error:

Anyone know why the Xcode designers made error messages unselectable and uncopyable?