> func genericFor<T>(s:String) -> T {
>
> return T(s)! // error. ’T’ cannot be constructed because it has no
> accessible initializers
> }
At compile time there is no way of determining if T has an initializer that
takes a string. You could do something like this
----------------
protocol InitFromString {
init?(_ value: String)
}
func genericFor<T: InitFromString>(s:String) -> T {
return T(s)!
}
----------------
Then add extensions to the various types you want to convert to make sure
they conform to the InitFromString protocol.
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