Swift callback inline function usage - swift

Question

Using Swift I can do a callback like the following:
userService.validateToken("6beba35f", success: onSuccess, failure: onFailure)
func onSuccess(status_code: Int, data: String)
{
var dd : String = ""
}
func onFailure(status_code: Int, data: String)
{
var dd : String = ""
}
but i would like to have the functions on the same line as the call:
Example 1:
userService.validateToken("6beba35f",
success: (Int, String) -> ()
{
},
failure: (Int, String) -> ()
{
})
Example 2:
userService.validateToken("6beba35f",
success: (Int, String)
{
},
failure: (Int, String)
{
})
both give errors. I think im close with Example 1 but it keeps giving me an error "Expected , seperator" and when i have it add the ","
success: (Int, String), -> ()
but the error keeps saying "Expected , separator"
Any ideas on what the solutions is?
Including function
func validateToken(token: String, success: (Int, String) -> Void, failure: (Int, String) -> Void)
{
if(Network.isOnline())
{
var url: String = Commons.plistValue("Base URL") + "/security/" + token
Alamofire.request(.GET, url)
.responseJSON { (request, response, json, error) in
let jsonData: JSON = JSON(json!)
let statusCode: Int = response!.statusCode
if(statusCode == 202)
{
success(statusCode, jsonData["status"]["message"].stringValue)
}
else
{
failure(statusCode, jsonData["status"]["message"].stringValue)
}
}
}
else
{
failure(-1, "No Internet Connection")
}
}
Usage Fix
userService.validateToken("6beba35f",
success: { status_code, data in
(
println(status_code)
)
},
failure: { status_code, data in
(
println(status_code)
)
})

Answer 1

There are several ways to declare or use closures. The simplest one you're looking for is probably:
{ status_code, data in
println(status_code)
}
This needs to be used in such a way that the compiler can infer the type of status_code, data, and determine that there should be no return value. For instance, you can pass it as a function parameter (what you want), or assign it to a variable with appropriate type hints.