【Rust】字節數組

環境

• Rust 1.56.1
• VSCode 1.61.2

概念

參考：https://doc.rust-lang.org/rust-by-example/std/str.html

示例

在字符串前加上一個 b 來表示。

main.rs

use std::str;

fn main() {
    let bytestring = b"this is a byte string";

    println!("A byte string: {:?}", bytestring);

    let escaped = b"\x52\x75\x73\x74 as bytes";
    println!("Some escaped bytes: {:?}", escaped);

    let raw_bytestring = br"\u{211D} is not escaped here";
    println!("{:?}", raw_bytestring);

    if let Ok(my_str) = str::from_utf8(raw_bytestring) {
        println!("And the same as text: '{}'", my_str);
    }

    let _quotes = br#"You can also use "fancier" formatting, \
                    like with normal raw strings"#;

    let shift_jis = b"\x82\xe6\x82\xa8\x82\xb1\x82\xbb"; // "ようこそ" in SHIFT-JIS

    match str::from_utf8(shift_jis) {
        Ok(my_str) => println!("Conversion successful: '{}'", my_str),
        Err(e) => println!("Conversion failed: {:?}", e),
    };
}

總結

了解了 Rust 中字節數組的定義和使用方式。

附錄