Struct TreeUtil 

pub struct TreeUtil;

Tree structure utility class

Example

use mitoo::{TreeData, TreeNode, TreeUtil};

#[derive(Debug, Clone)]
struct Menu {
    id: u64,
    name: String,
    pid: u64,
    // 可添加其他自定义字段
}

// 为 Menu 实现 TreeData 约束
impl TreeData for Menu {
    type Id = u64;
    fn id(&self) -> Self::Id { self.id }
    fn name(&self) -> &str { &self.name }
    fn pid(&self) -> Self::Id { self.pid }
    // 定义根节点的父 ID 为 0
    fn root_pid() -> Self::Id { 0 }
}

mod tests {
    use super::*;
    #[test]
    fn test01() {
        // 准备扁平数据
        let menus = vec![
            Menu {
                id: 1,
                name: "系统管理".to_string(),
                pid: 0,
            },
            Menu {
                id: 2,
                name: "用户管理".to_string(),
                pid: 1,
            },
            Menu {
                id: 3,
                name: "角色管理".to_string(),
                pid: 1,
            },
            Menu {
                id: 4,
                name: "菜单管理".to_string(),
                pid: 2,
            },
            Menu {
                id: 5,
                name: "数据统计".to_string(),
                pid: 0,
            },
        ];

        // 转换为树形结构
        let trees = TreeUtil::to_trees(menus);
        println!("{:#?}", trees);
    }
}

Implementations

impl TreeUtil

pub fn to_trees<T: TreeData + Clone>(vec: Vec<T>) -> Vec<TreeNode<T>>

将扁平列表转换为树形结构