除了使用match表达式外,我们还可以使用if let表达式来简化匹配。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 enumColor{Red,Green,Blue,RGB(u8,u8,u8),}fnprint_color(color:Color){ifletColor::Red=color{println!("The color is red!");}elseifletColor::RGB(_,0,0)=color{println!("The col...
ifletx=Some(2){dbg!(x);} 其实if let还可以接else分支的,我们再来看个例子 fnmain(){letfavorite_color:Option<&str>=None;letis_tuesday=false;letage:Result<u8,_>="34".parse();ifletSome(color)=favorite_color{println!("Using your favorite color, {color}, as the background");}elseifis...
usestd::sync::mpsc::{Sender,Receiver};usestd::sync::mpsc;let(tx:Sender,rx:Receiver)=mpsc::channel();//创建channel mpsc::channel 函数来创建channel;mpsc 是 多个生产者,单个消费者(multiple producer, single consumer)的缩写。函数返回两个变量tx和rx表示通道的两端,tx表示发送者,rx表示接收者。 在创...
let mut offset_cursor = 0; // 3. 按照字段在源代码中的词法声明次序,逐一遍历每个字段。 for field in struct.fields_in_declaration_order() { if offset_cursor.rem_euclid(field.alignment) > 0 { // 4. 需要【对齐】当前字段 offset_cursor = offset_cursor.next_multiple_of(field.alignment); }...
模式匹配是 Rust 中一种非常强大的错误处理机制，而且提供多种使用方式：我们可以使用 if let else 和 let else，二者都涉及模式匹配，后文将具体介绍。// backend/src/router.rspub async fn login( State(mut state): State<AppState>, jar: PrivateCookieJar, Json(login): Json<LoginDetails>,) ...
多生产者单消费者(Multiple Producer, Single Consumer, MPSC) 多生产者多消费者(Multiple Producer, Multiple Consumer, MPMC) 其中MPSC 是最常用的,在 Rust 中,它是通过 std::sync::mpsc 模块来实现的。我们来看看它是如何使用的。 复制 usestd::sync::mpsc;let(s,r)=mpsc::channel();lets1=mpsc::Send...
If you are not using Rust, egui is not for you. If you want a GUI that looks native, egui is not for you. If you want something that doesn't break when you upgrade it, egui isn't for you (yet).But if you are writing something interactive in Rust that needs a simple GUI, ...
let mut buf = [0u8; 1024]; loop { let rsize = match stream.read(&mut buf) { Ok(size) => size, Err(err) => panic!(err), }; // EOF: read 0 size if rsize == 0 { break; } match stream.write_all(&buf[..rsize]) { ...
You want to vet your idea with as many users as possible, so you need to be able to compile your code for multiple architectures. Your users have their own preferences on what machines and OS to use, so we should do our best to meet them in their preferred set-up. This is why it...
The C2Rust transpiler now builds using a stable Rust compiler. If you are developing other features, you may need to install the correct nightly compiler version.Installing from crates.iocargo install c2rustYou can also set the LLVM version explicitly if you have multiple installed, like this, ...