我想从函数返回一个函数或一个值,它可以是 Int 或 String 或 Swift 中的其他类型。可以代表所有这些的类型是什么?
由于 autoCurry 函数中的这一行,以下代码会引发错误return self.autoCurry(function, params, numArgs: argsRemaining)
class $ {
class func curry<P, T>(function: (P...) -> T, _ parameters: (P[])) -> ((P...) -> Any?) {
return {
(curryParams: P...) -> Any? in
var params:P[] = []
return function(reinterpretCast(parameters + curryParams))
}
}
class func autoCurry<P, T>(function: (P...) -> T, _ parameters: (P[]), numArgs: Int) -> ((P...) -> Any?) {
let funcParams: P[] = []
let funcRef = { (curryParams: P...) -> Any? in
if curryParams.count < numArgs {
let argsRemaining = numArgs - curryParams.count
let params = parameters + curryParams
return self.autoCurry(function, params, numArgs: argsRemaining)
} else {
return function(reinterpretCast(curryParams))
}
}
return funcRef
}
}