#[arg(default_value_t = 2020)] port: u16, } fn main() { let cli = Cli::parse(); println!("port: {:?}", cli.port); } 2.10 参数枚举 我们使用 #[arg(value_enum)] 设置参数枚举 结合枚举类 use clap::{Parser, ValueEnum}; #[derive(Parser)] #[command(author, version, about, lo...
我们使用#[arg(default_value_t)] 属性来给参数设置默认值 use clap::Parser; #[derive(Parser)] #[command(author, version, about, long_about = None)] struct Cli { #[arg(default_value_t = 2020)] port: u16, } fnmain() { letcli = Cli::parse(); println!("port: {:?}", cli.port...
useclap::Parser;#[derive(Parser)]structCli{#[arg(default_value_t = 2020)]port:u16}fnmain(){letcli=Cli::parse();println!("port: {:?}",cli.port);} 验证 我们手动制定一个验证器函数,这个函数要返回一个Result类型,接受一个&str参数 usestd::ops::RangeInclusive;constPORT_RANGE:RangeInclusive...
#[arg(short, long, default_value_t = 1)] 使用#[]语法定义的属性注解。 这其中分为Raw attributes和Clap自定义的Magic attributes. 其中derive,command,arg就相当于Raw attributes,command下面的author,version就是Magic attributes. 在Clap官方文档中有句话 Raw attributesare forwarded directly to the underlying...
[clap_builder::builder::command]Auto [clap_builder::parser::parser]Parser::add_defaults [clap_builder::parser::parser]Parser::add_defaults:iter:ignore_immutable: [clap_builder::parser::parser]Parser::add_default_value: doesn't have conditional defaults [clap_builder::parser::parser]Parser::...
// We don't have syntax yet for optional options, so manually calling `required` .required(false) .value_parser(value_parser!(PathBuf)), ) .arg(arg!( -d --debug ... "Turn debugging information on" )) .subcommand( Command::new("test") ...
name: String, /// Number of times to greet #[clap(short, long, default_value_t = 1)] count: u8, } fn main() { let args = Args::parse(); for _ in 0..args.count { println!("Hello {}!", args.name) } }© 2022 GitHub, Inc. Terms Privacy Security Status Docs Contact ...
let config = matches.value_of("config").unwrap_or("default.conf"); println!("Value for config: {}", config); // 在这里调用.unwrap()是安全的,因为需要“ INPUT”(如果不需要“ INPUT”, // 可以使用 “if let” 有条件地获取值)
name: clap-yaml version: "1.0" author: Zrzka about: Stackoverflow sample args: - lang: short: l long: lang default_value: cz takes_value: true possible_values: - cz - en src/main.rs内容: 代码语言:javascript 运行 AI代码解释 use clap::{App, load_yaml}; fn main() { let yaml = ...
Allow empty values no longer default UseValueDelimiter no longer the default Multiple delima fixed (vals vs occurrences) Ability to mutate args once they've been added to an App App::args and App::arg are more generic Can unset global settings ...