Macro values_t_or_exit

macro_rules! values_t_or_exit {
    ($m:ident, $v:expr, $t:ty) => { ... };
    ($m:ident.values_of($v:expr), $t:ty) => { ... };
}

Convenience macro getting a typed value Vec<T> where T implements std::str::FromStr or exiting upon error.

NOTE: This macro is for backwards compatibility sake. Prefer values_t!(/* ... */).unwrap_or_else(|e| e.exit())

Examples

let matches = App::new("myapp")
              .arg_from_usage("[seq]... 'A sequence of pos whole nums, i.e. 20 45'")
              .get_matches();

let vals = values_t_or_exit!(matches.values_of("seq"), u32);
for v in &vals {
    println!("{} + 2: {}", v, v + 2);
}

// type for example only
let vals: Vec<u32> = values_t_or_exit!(matches, "seq", u32);
for v in &vals {
    println!("{} + 2: {}", v, v + 2);
}