There is anything like nodiscard attribute in D?

[victoroak via Digitalmars-d-learn]

I have an Expected/Result struct, but without an attribute 
similar to nodiscard 
(https://en.cppreference.com/w/cpp/language/attributes/nodiscard) 
is not very useful.

There is anything like that in D? If not, there is any plan to 
add it?