The D programming language is mostly this, or could be this, however it has several flaws. It still isn't as polished and doesn't have the ecosystem, and is sor

The D programming language is mostly this, or could be this, however it has several flaws. It still isn't as polished and doesn't have the ecosystem, and is sort of trying to be Rust, C# and Python at the same time which doesn't always work out that well. But when it does, it is amazing. It also has some crazy and unusually powerful metaprogramming abilities.