This StackOverflow answer may help clarify things: http://stackoverflow.com/a/28096079/659248 http://stackoverflow.com/a/28096079/659248. Making return types wo

This StackOverflow answer may help clarify things: http://stackoverflow.com/a/28096079/659248 http://stackoverflow.com/a/28096079/659248. Making return types work well with multiple dispatch is not so simple; we feel that it's better to wait to add that feature and get it right than to rush things and have to fix it later. Some background, context and tentative plans for return type annotations: https://github.com/JuliaLang/julia/issues/1090 https://github.com/JuliaLang/julia/issues/1090.