art-tutorial 0.1.1

//! # Art
//!
//! A library for modeling artistic concepts.

// pub use 将模块的内容引入到当前作用域中
// 可以在当前模块中直接使用 PrimaryColor 和 SecondaryColor 枚举
// 即在main.rs中可以直接使用art::PrimaryColor和art::mix
pub use self::kinds::PrimaryColor;
pub use self::kinds::SecondaryColor;
pub use self::utils::mix;

pub mod kinds {
    /// The primary colors according to the RYB color model.
    pub enum PrimaryColor {
        Red,
        Yellow,
        Blue,
    }

    /// The secondary colors according to the RYB color model.
    pub enum SecondaryColor {
        Orange,
        Green,
        Purple,
    }
}

pub mod utils {
    use crate::kinds::*;

    /// Combines two primary colors in equal amounts to create
    /// a secondary color.
    // 2 个用法
    #[allow(unused)]
    pub fn mix(c1: PrimaryColor, c2: PrimaryColor) -> SecondaryColor {
        // --snip--
        unimplemented!();
    }
}