Rust:根目录中没有模块 [英] Rust: no `module` in the root

问题描述

当我在 src/cmdline.rs 中运行 use crate :: feed; 时，我希望导入 src/feed.rs ，但事实并非如此.相反，我明白了，

When I run use crate::feed; in src/cmdline.rs I expect that to import src/feed.rs, but it doesn't. Instead I get,

error[E0432]: unresolved import `crate::feed`
 --> src/cmdline.rs:2:5
  |
2 | use crate::feed;
  |     ^^^^^^^^^^^ no `feed` in the root

尽管存在 src/feed.rs 的事实.但是，如果我感到恐慌并将其更改为 mod feed; ，那么我会得到

Despite the fact that src/feed.rs exists. However, if I panic and change it to mod feed; then I get

error[E0583]: file not found for module `feed`
 --> src/cmdline.rs:2:1
  |
2 | mod feed;
  | ^^^^^^^^^
  |
  = help: to create the module `feed`, create file "src/cmdline/feed.rs"

使用 mod super ::

error: expected identifier, found keyword `super`
 --> src/cmdline.rs:2:5
  |
2 | mod super::feed;
  |     ^^^^^ expected identifier, found keyword

或与一起使用super ::

error[E0432]: unresolved import `super::feed`
 --> src/cmdline.rs:2:5
  |
2 | use super::feed;
  |     ^^^^^^^^^^^ no `feed` in the root

有问题的文件的文件结构如下:

File structure for files in question looks like this,

src/feed.rs
src/cmdline.rs
src/main.rs

推荐答案

我知道了.rust模块系统不允许导入同级文件，

I figured it out. The rust module system doesn't permit importing sibling files,

• src/a.rs
• src/b.rs

完全停止: a.rs 无法导入 b.rs .它将要做的是尝试从中获取

Full stop: a.rs can not import b.rs. What it will do is try to source it from

• src/a/b.rs

如果您正在寻找答案，那么这对您来说可能都不有意义，并且您已经在此上浪费了数小时.这是我感到困惑的原因:

If you're on this answer, none of this probably makes sense to you and you've wasted hours on this. This was a source of my confusion:

• src/main.rs

实际上很特别.在 src/main.rs 内，一个 mod 将导入一个同级文件(以及现在已弃用的 mod.rs ；或者，使用 lib.rs ).但要点是，您自己的锈文件不能在同级文件中使用锈代码.

Is actually special. Inside src/main.rs a mod will import a sibling file, (and also with the now deprecated mod.rs; or, with lib.rs). But the point is that your own rust files can't make use of rust code in sibling files.

这篇关于Rust:根目录中没有模块的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！