Capture the Flag   ![Latest Version]

Capture the Flag is a command-line flag parser Rust library.

Usage

```rust use ctflag::{Flags, FromArg, FromArgError, FromArgResult};

[derive(Flags)]

struct MyFlags { #[flag(desc = "The floopy floops the whoop")] enable_floopy: bool,

#[flag(
    desc = "How many slomps to include",
    placeholder = "INTEGER",
    default = 34
)]
slomp_count: i64,

#[flag(desc = "An optional path to a Gmup", placeholder = "PATH")]
gmup: Option<String>,

#[flag(short = 'h', desc = "Prints this help message")]
help: bool,

}

// Custom type. enum Fruit { Apple, Orange, }

impl FromArg for Fruit { fn fromarg(s: &str) -> FromArgResult { match s { "apple" => Ok(Fruit::Apple), "orange" => Ok(Fruit::Orange), _ => Err(FromArgError::withmessage("must be an apple or orange")), } } }

fn main() { let result = MyFlags::from_args(std::env::args()); match result { Ok((flags, args)) => { if flags.help { println!("{}", MyFlags::description()); return; } // ... } Err(err) => { println!("Error parsing flags: {}", err); println!("{}", MyFlags::description()); } } } ```

Setup

toml [dependencies] ctflag = "0.1"