Rust - 在另一个目录中包含 rust 模块

Question

This is my directory structure

src/
├── lib.rs
├── pages/
│   ├── mod.rs
│   ├── home_page.rs
└── components/
    ├── mod.rs
    └── header.rs

Inside my pages/home_page.rs I try to access my pub struct Header which is inside components/header.rs .

My components/mod.rs looks like this: pub mod header; which works fine because inside lib.rs - I can use it like:

mod components;
use components::header::Header;

However, I don't know how to access it in pages/homepage.rs . How can get access to that struct? Is it something in Cargo.toml?

Answer 1

You can use a whole bunch of Rust keywords to navigate between the modules of your crate:

super::components::Header
// `super` is like a `parent` of your current mod

crate::components::Header
// `crate` is like a root of you current crate

And to include submodules of current mod:

self::submodule1::MyStruct
// `self` is like current module

You can read more about that here

Also it is good idea to make a prelude mod of your crate and include all main items of your crate there, so then you can include them just by passing use crate::prelude::* . You can read more about prelude in offical rust docs and here .

Answer 2

在我的src/pages/home_page.rs我可以使用我的标题，例如： use crate::components::header::Header;