ofTypes.h syntax error

I am running ArtoolKit plus code given in this link in xcode. I copied the required files in apps and libs into my own openframework downloads. Now when I tried to compile the code I receive following error:
openframeworks/libs/openFrameworks/types/ofTypes.h:308:50: Expected ‘)’

I found following is the line that throws the error:
return std::unique_ptr(new U[sizeof…(Args)]{std::forward(args)…});