这是代码:
extern crate tempdir;
use std::env;
use tempdir::*;
#[test]
fn it_installs_component() {
let current_dir = env::current_dir().unwrap();
let home_dir = env::home_dir().unwrap();
let tmp_dir = env::temp_dir();
println!("The current directory is: {}", current_dir.display());
println!("The home directory is: {}", home_dir.display());
println!("The temporary directory is: {}", tmp_dir.display());
let stage_dir = TempDir::new_in(tmp_dir.as_path(), "Components-Test");
let components_dir = TempDir::new_in(stage_dir.unwrap().path(), "Components");
// This is "offending line"
// let components_make_dir = TempDir::new_in(stage_dir.unwrap().path(), "Components.make");
println!("---- {:?}", components_dir.unwrap().path());
//println!("---- {:?}", components_make_dir.unwrap().path());
}
如果有问题的行被注释掉,代码编译得很好。如果我取消注释,我开始收到错误消息:
error[E0382]: use of moved value: `stage_dir`
--> src/main.rs:21:51
|
18 | let components_dir = TempDir::new_in(stage_dir.unwrap().path(), "Components");
| --------- value moved here
...
21 | let components_make_dir = TempDir::new_in(stage_dir.unwrap().path(), "Components.make");
| ^^^^^^^^^ value used here after move
|
= note: move occurs because `stage_dir` has type `std::result::Result<tempdir::TempDir, std::io::Error>`, which does not implement the `Copy` trait
我知道问题是我stage_dir
第一次使用它时会移动,但我看不到如何stage_dir
在这两个子文件夹之间共享,因为我需要在测试中访问它们。
我试着玩,&stage_dir
但这产生了一些对我来说更加模糊的警告。