Rust code shared from the playground

playground.rs

#[macro_use] extern crate nom;

fn to_s(i: Vec<u8>) -> String {
    String::from_utf8_lossy(&i).into_owned()
}

named!( single_quoted_shell_arg(&[u8]) -> String
      , map!( delimited!( char!('\'')
                        , escaped_transform!( not!(char!('\''))
                                            , "\\"
                                            , tag!("'") => { |_| &b"'"[..] }
                                            )
                        , char!('\'')
                        )
            , to_s
            )
      );

#[test]
fn can_parse_single_quoted_shell_arg() {
    assert_eq!( single_quoted_shell_arg(b"'hello'"[..])
              , Done(&b""[..], b"hello"[..]));
}