Hi all! From Kotlin Native I’m trying to access a ...

# kotlin-native

[juancho]

Hi all! From Kotlin Native I’m trying to access a swift extension:

SWIFT CODE:
let originalString = "test/test"
let escapedString = originalString.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)
print(escapedString!)

I found that this function is defined as an extension in a class called StringProtocol

extension StringProtocol where Self.Index == String.Index {

Any idea how can I get access to this function from Kotlin Native? Thanks!

[juancho]

I didn’t find a way to access this function but yes this other one and it works!:

fun String.encode(): String? {
    return (this as? NSString)?.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLHostAllowedCharacterSet)
}

[juancho]

Still I’m not totally sure if this cast to NSString is the right way to go as the IDE warns this will never work:
This cast can never success

[svyatoslav.scherbina]

This cast can never success

Known issue, this warning is wrong. Your Kotlin function definition is fine.

[juancho]

Thanks @svyatoslav.scherbina! And do you know how can I access a swift extension?

[svyatoslav.scherbina]

You can’t access pure Swift extension.
On the other hand, this function doesn’t seem to be Swift extension, it is the same as stringByAddingPercentEncodingWithAllowedCharacters. You can ensure this by switching language between Swift and Objective-C in the documentation for one of these functions.

[juancho]

In my original question I asked about this function:

originalString.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)

I end up using the other one that you mentioned as an alternative

[juancho]

ohh my bad.. now I know what you mean! Interesting, thanks for pointing this out!