Rust中的Cargo工作空间实践

这是为了开发大型程序，分治crate用的。

目录结构如下：

一，根cargo.toml内容

1[workspace]
2
3members = [
4    "adder",
5    "add-one",
6    
7]

二，adder里的cargo.toml内容

1[package]
2name = "adder"
3version = "0.1.0"
4authors = ["test <test@qq.com>"]
5edition = "2018"
6
7# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
8
9[dependencies]
10add-one = { path = "../add-one" }

三，main.rs内容

1use add_one;
2
3fn main() {
4    let num = 10; 
5    println!("Hello, world! {} plus one is {}!", num, add_one::add_one(num));
6}

四，Lib.rs内容

1pub fn add_one(x: i32) -> i32 {
2    x + 1
3}
4
5#[cfg(test)]
6mod tests {
7    use super::*;
8
9    #[test]
10    fn it_works() {
11        assert_eq!(3, add_one(2));
12    }
13}