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// run-pass fn parse_args() -> String { let args: Vec<_> = ::std::env::args().collect(); let mut n = 0; while n < args.len() { match &*args[n] { "-v" => (), s => { return s.to_string(); } } n += 1; } return "".to_string() } pub fn main() { println!("{}", parse_args()); }