Nil doesn't work well with macOS, mixed objectivec++ and c++

[dimitre]

Hello, it seems Nil is a reserved word in objectivec++ Any workaround, like renaming the Nil? Thanks

/Volumes/tool/ofw/apps/pgd/ofxProjectGenerator/src/uuidxx/src/uuidxx.h:11:3: error: expected identifier
                Nil,
                ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/objc/objc.h:98:16: note: expanded from macro 'Nil'
#   define Nil nullptr

[mqudsi]

We can undef Nil at the top of the header file and restore it at the bottom and add an alias for it for ObjC users like Nill or something.

[mqudsi]

Can you try this? https://github.com/neosmart/uuidxx/pull/2