Is there a functional language for C++ ecosystem?

Question

Java has Scala and .NET has F#. Both of these languages are very highly integrated into the respective Java and .NET platforms. Classes can be written in Scala then extended i

Answer 1

C++ doesn't have an ecosystem in the sense of Java or .NET. There's no virtual machine, no runtime environment even, there's only a highly specialized standard library that by design doesn't operate well in a purely functional environment. C++ doesn't even have an ABI standard.

All things considered, I'm not sure what you mean/expect.