For these who are currious about learning more for D Language this is link to free online book: http://qznc.github.io/d-tut/hello.html
quote from there:
D is greatly inspired by C++ and inherit parts of its philosophy. D provides powerful abstraction mechanisms without sacrificing performance. If you are looking for a better C++, you should feel at home with D. If you dislike C++, you might like D for being C++ done right.