# cc4 Implementation of four_cc in Rust as a `const fn`. Supports both little and big endian systems. ```rust four_cc(b"code"); ``` Since `four_cc` is a `const fn`, you can also use it to define `enum` values for `enums` represented by `u32`. ```rust #[repr(u32)] pub enum Id { Apple = four_cc(b"appl"), } ```