相关疑难解决方法(0)

Rust有一个与非词汇生命周期相关的RFC,已被批准在该语言中实现了很长时间.最近,Rust对此功能的支持有了很大改进,并且被认为是完整的.

我的问题是:非词汇生命究竟是什么？

我正在尝试在Rust中实现树结构,遍历它并修改它,并且我遇到了借用检查器的问题.我的设置或多或少如下:

#![feature(slicing_syntax)]

use std::collections::HashMap;

#[deriving(PartialEq, Eq, Hash)]
struct Id {
    id: int,  // let’s pretend it’s that
}

struct Node {
    children: HashMap<Id, Box<Node>>,
    decoration: String,
    // other fields
}

struct Tree {
   root: Box<Node>
}

impl Tree {
    /// Traverse the nodes along the specified path.
    /// Return the node at which traversal stops either because the path is exhausted
    /// or because there are no more nodes matching the path.
    /// Also return any remaining steps in the …