0252-CLAP-标记类型的参数

环境

• Time 2022-12-02
• WSL-Ubuntu 22.04
• CLAP 4.0.29

前言

说明

参考：https://docs.rs/clap/latest/clap/index.html

目标

使用标记类型的参数。

Cargo.toml

[package]
edition = "2021"
name = "game"
version = "1.0.0"

[dependencies]
clap = {version = "4", features = ["cargo"]}

main.rs

use clap::{command, Arg, ArgAction};

fn main() {
    let matches = command!()
        .arg(
            Arg::new("verbose")
                .short('v')
                .long("verbose")
                .action(ArgAction::SetTrue)
                .help("调试信息"),
        )
        .get_matches();

    println!("输入的参数是: {}", matches.get_flag("verbose"));
}

查看帮助

root@jiangbo12490:~/git/game/target/release# ./game -h
Usage: game [OPTIONS]

Options:
  -v, --verbose  调试信息
  -h, --help     Print help information
  -V, --version  Print version information

使用

root@jiangbo12490:~/git/game/target/release# ./game
输入的参数是: false
root@jiangbo12490:~/git/game/target/release# ./game -v
输入的参数是: true

总结

使用标记类型的参数。

附录