Compiler directive else is ignored

I saw the issue #83 was implemented however I had some observations.

Given a source file source.swift;

#if DEBUG
import X
#elseif RELEASE
import Y
#endif

/// @mockable
protocol SwiftTest {}

mockolo -srcs source.swift -d Mock.swift && cat Mock.swift outputs;

#if DEBUG
import X
#endif
#if RELEASE
import Y
#endif

which is reflected correctly.

However;

#if DEBUG
import X
#else
import Y
#endif

/// @mockable
protocol SwiftTest {}

outputs;

import X
import Y
#if DEBUG
import X
#endif

which is incorrect. import Y should only be there for #else case.

Another observation (I don't know if this is supported or not) I had was compiler directives are not working inside the protocol definitions.

/// @mockable
protocol SwiftCompilerTest {
    #if compiler(<4.0)
    func swiftLessThan4()
    #else
    func swift()
    #endif
}

outputs;

class SwiftCompilerTestMock: SwiftCompilerTest {
    init() { }

    #if compiler(<4.0)

    private(set) var swiftLessThan4CallCount = 0
    var swiftLessThan4Handler: (() -> ())?
    func swiftLessThan4()  {
        swiftLessThan4CallCount += 1
        if let swiftLessThan4Handler = swiftLessThan4Handler {
            swiftLessThan4Handler()
        }

    }
    #endif
}

func swift() seems to be completely ignored in this case.

• mockolo version : 2.1.1
• swift version: swift: swiftlang-6.0.0.9.10 clang-1600.0.26.2

Start by reproducing both examples with mockolo 2.1.1 using source.swift and inspect the generated Mock.swift output. Trace how top-level #else directives and directives inside protocol definitions are parsed and emitted; done means each branch is preserved with the expected conditional behavior and both examples generate the correct mock.