Support access modifiers in Swift regexes

[frodella-daitan]

The class detection mechanism would fail in cases where an access modifier was used before the class definition.

I debated using "\w*" instead of naming each possible modifier, but I feel that the latter approach is safer.

[samdods]

Good call, but I think you should use ? instead of * because correct me if i'm wrong but you can only use one of the modifiers at a time?

[frodella-daitan]

You're right, I was trying to account for both the @objc and an access modifier being present at the same time, but I forgot to:

• handle the whitespace between @objc and the access modifier
• handle the exposed name for the @objc directive

My latest commit fixes that. The resulting regex turned out quite complex, so I moved the prefix handling to separate strings and then composed the complete regex using stringWithFormat. Here are some cases the regex should now handle correctly:

• public class MyClass
• @objc public class MyClass
• @objc(ObjCName) public class MyClass
• @objc (ObjCName) public class MyClass
• @objc ( ObjCName ) public class MyClass

Let me know your thoughts :)

[samdods]

I think there's probably a way we could remove some of the repetition and simplify this more... but perhaps it would lead to less readable regex expressions - and they're already getting quite unreadable!! happy to merge, but i'll wait till i get to my main machine to run and test before merging

thanks for your input :)