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//! parsing argument value into enum. You can use crate `strum`'s `EnumString` for this purposes as well
//!
use std::str::FromStr;
use bpaf::*;
#[derive(Debug, Clone)]
enum Baz {
Foo,
Bar,
FooBar,
}
impl FromStr for Baz {
type Err = String;
fn from_str(s: &str) -> Result<Self, String>
where
Self: Sized,
{
match s {
"foo" => Ok(Baz::Foo),
"bar" => Ok(Baz::Bar),
"foobar" => Ok(Baz::FooBar),
_ => Err("Expected foo|bar|foobar".to_string()),
}
}
}
fn main() {
let opt = long("baz")
.short('b')
.help("choose between foo, bar or foobar")
.argument::<Baz>("CMD")
.to_options()
.run();
println!("{:#?}", opt);
}