> Am 15.04.2017 um 17:33 schrieb Xiaodi Wu <[email protected]>:
>
> I think you misunderstand how access modifiers currently work with
> extensions. It is not permitted to use an access modifier inside an extension
> that is higher than that of the extension itself.
class Check {}
fileprivate extension Check {
public func px() {
print("It compiles!")
}
}
Check().px()
This code executes without complains — but your example is right, it fails if
the extension is marked private… wtf? Access modifiers aren't even mentioned in
https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/Extensions.html#//apple_ref/doc/uid/TP40014097-CH24-ID151
It really seems to me that the current extension-model is somewhat broken; do
you have a link to documentation of access levels for extensions?
> ```
> private struct S {
> private extension {
> func f() { } // what is the access level of `f`?
> }
> }
> ```
>
> If `f` is private, then it is invisible outside the extension. But `f` cannot
> be `fileprivate`, because `fileprivate` is more visible than the private
> extension and is therefore not allowed.
I'd simply say f is private and only visible inside the extension…
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