Macro clap::values_t_or_exit
source · [−]macro_rules! values_t_or_exit {
($m:ident, $v:expr, $t:ty) => { ... };
($m:ident.values_of($v:expr), $t:ty) => { ... };
}
Expand description
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);
}