# FeOs-derive
[](https://crates.io/crates/feos-derive)
[](https://docs.rs/feos-derive)
`feos-derive` is part of the [FeOs project](https://github.com/feos-org/feos).
> **FeOs - A Framework for Equations of State and Classical Density Functional Theory**
## What it does
The `feos-derive` crate contains macros that provide boilerplate for the implementation of several traits from `feos-core` and `feos-dft` for the FFI conform enums in `feos`. With these macros, new equations of state and functionals can be added straightforwardly to the Python interface or other FFIs.