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//! #Art //! //! 一个用于建立艺术概念的代码库 pub use self::art::kinds::PrimaryColor; pub use self::art::kinds::SecondaryColor; pub use self::art::utils::mix; pub mod art { pub mod kinds { pub enum PrimaryColor { Red, Yellow, Blue, } pub enum SecondaryColor { Orange, Green, Purple, } } pub mod utils { use super::kinds::*; pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor { SecondaryColor::Green } } }