Support Sendable compliant protocols and classes

[nhiroyasu]

Summary

I have implemented the enhancements proposed in issue #252.

For mock classes that are required to conform to the Sendable protocol, I have made them inherit from @unchecked Sendable. This change should help reduce the number of unnecessary compiler warnings.

Examples

Source

protocol SendableProtocol: Sendable {}
class UncheckedSendableClass: @unchecked Sendable {}
final class SendableClass: Sendable {}

Output

class SendableProtocolMock: SendableProtocol, @unchecked Sendable {}
class UncheckedSendableClassMock: UncheckedSendableClass, @unchecked Sendable {}
// final class SendableClass is skipped, because final class can't make a mock class.

Previews

Before	After

[sidepelican]

Thank you very much. This is probably a feature many of us have been waiting for.

It seems to be mostly fine.

[sidepelican]

Maybe this can be more beautify like this:

var inheritedTypes = inheritedTypes
inheritedTypes.insert("\(moduleDot)\(identifier)", at: 0)

\(acl)\(finalStr)class \(name): \(inheritedTypes.joined(", ")) {

[sidepelican]

please use formUnion to avoid CoW overhead

[nhiroyasu]

Thank you for the review!
I was not aware of the issue with CoW overhead. I will fix this along with the other review points.

[sidepelican]

unused import.

[sidepelican]

unused import.

[nhiroyasu]

@sidepelican
I have made the corrections to the areas you specified.

[sidepelican]

Looks good! Thank you!