September 10th - Luo Yu

Rust语言学习笔记

Installation 安装

习惯的

$ brew search rust
==> Searching local taps...
rust       rustc-completion       rustup-init      uncrustify

然�顺手就�以:

$ brew install rust

这样安装完之�是�以使用rustc等的.

然而缺少rustup工具, 也因为brewå�Œä¸€ç®¡ç�†è·¯å¾„çš„å�Ÿå› , 缺失~/.cargo目录, (ä¸�知é�“为啥没有至少一个软è¿�æ�¥?).

所以出�学习阶段(在我还没弄清�更好时), 先使用官方的方法(况且cargo是Rust的package manager):

如æ�œbrew安装过的, 别忘了先brew uninstall rustå�¸è½½æ�‰.

$ curl https://sh.rustup.rs -sSf | sh
info: downloading installer

Welcome to Rust!

This will download and install the official compiler for the Rust programming
language, and its package manager, Cargo.

It will add the cargo, rustc, rustup and other commands to Cargo's bin
directory, located at:

  /Users/blodely/.cargo/bin

This path will then be added to your PATH environment variable by modifying the
profile files located at:

  /Users/blodely/.profile
  /Users/blodely/.zprofile

You can uninstall at any time with rustup self uninstall and these changes will
be reverted.

Current installation options:

   default host triple: x86_64-apple-darwin
     default toolchain: stable
  modify PATH variable: yes

1) Proceed with installation (default)
2) Customize installation
3) Cancel installation
1

info: syncing channel updates for 'stable-x86_64-apple-darwin'
info: latest update on 2017-08-31, rust version 1.20.0 (f3d6973f4 2017-08-27)
info: downloading component 'rustc'
 35.1 MiB /  35.1 MiB (100 %) 121.6 KiB/s ETA:   0 s
info: downloading component 'rust-std'
 49.0 MiB /  49.0 MiB (100 %) 128.0 KiB/s ETA:   0 s
info: downloading component 'cargo'
  2.6 MiB /   2.6 MiB (100 %) 124.8 KiB/s ETA:   0 s
info: downloading component 'rust-docs'
  3.6 MiB /   3.6 MiB (100 %) 115.2 KiB/s ETA:   0 s
info: installing component 'rustc'
info: installing component 'rust-std'
info: installing component 'cargo'
info: installing component 'rust-docs'
info: default toolchain set to 'stable'

  stable installed - rustc 1.20.0 (f3d6973f4 2017-08-27)


Rust is installed now. Great!

To get started you need Cargo's bin directory ($HOME/.cargo/bin) in your PATH
environment variable. Next time you log in this will be done automatically.

To configure your current shell run source $HOME/.cargo/env

这里当然猴急的è¿�è¡Œsource $HOME/.cargo/env,

�就测试一下:

$ rustc --version
rustc 1.20.0 (f3d6973f4 2017-08-27)

一切正常.

Hello, world

$ vim main.rs

然�录入:

fn main() {
    println!("Hello, world!~");
}

编译:

$ rustc main.rs

�行二进制文件:

$ ./main
Hello, world!~

Cargo

Cargo命令给出的解释是: Rust's package manager.

好�, 使用Cargo�创建一个工程看看.

$ cargo new hello_cargo --bin
    Created binary (application) `hello_cargo` project

这样就创建了一个binary�应用程�(而�是一个库)的工程了.

cdè¿›å�»å�‘ç�°, 还给默认åˆ�始化æˆ�一个git仓库了.

$ git status
On branch master

Initial commit

Untracked files:
  (use "git add <file>..." to include in what will be committed)

    .gitignore
    Cargo.toml
    src/

文件结æ�„已归好, 还å¢�加git ignore文件.

查阅文档, --vcså�‚æ•°å�¯æ�§åˆ¶æ­¤é¡¹.

然å��这个Cargo.toml文件类å�‹è®©æˆ‘为之一震...

toml = Tom's Obvious, Minimal Language GithubRepo

$ cat Cargo.toml
[package] # 段�标题; �置一个包
name = "hello_cargo"
version = "0.1.0"
authors = ["Luo Yu <indie.luo@gmail.com>"]

[dependencies] # 项目�赖的crates列表(crate: Rust代�包)

�建��行:

$ cargo build # cargo run
   Compiling hello_cargo v0.1.0 (file:///Users/blodely/Desktop/hello_cargo)
    Finished dev [unoptimized + debuginfo] target(s) in 3.27 secs
$ ./target/debug/hello_cargo
Hello, world!

Author

Luo Yu

indie.luo@gmail.com

Tuesday, September 12, 2017