Apparently the authors of Rust believe monads are useful, as they come in the standard library. Rust's Option and Result types are monads, for instance. Rust la

Apparently the authors of Rust believe monads are useful, as they come in the standard library. Rust's Option and Result types are monads, for instance. Rust lacks a feature, called higher-kinded types, that allow you to abstract over type constructors such as Option and Result and give a name to the monad concept. Thus in Rust you can create monads by convention but cannot create a type that actually embodies that concept.