Swift - Trailing Closure Syntax

Question

I'm diving into Swift lang by Apple and have some problems using the trailing closure syntax, example:

func test(txt: String, resolve: (name: String) -> Void) {
   resolve(name: "Dodo")
}

// Errors here complaining on resolve param
test("hello", (name: String) {
   println("callback")
})

How to fix it?

Solution

you have the wrong closure syntax

test("hello", {(name: String) in 
    println("callback")
})

or

test("hello", {
   println("callback: \($0)")
})

or

test("hello") {(name: String) in 
    println("callback")
}

or

test("hello") {
   println("callback: \($0)")
}

Comments

[Kosmetika]

I have one more question, this resolve(name: name) throws an error use of unresolved identifier 'name'.. how to pass arguments in callback call?

[Christian Dietrich]

hi i dont get that. can you share the code that fails?

[jmg]

I have a question... In the first code example that you provided above, you have "{(name: String) in". What's the semantic meaning of "in" when used in this context?

[Christian Dietrich]

In is the separator between parameters and statements