Code shared from the Rust Playground

playground.rs

struct Context<'s>(&'s str);

struct Parser<'a, 's>{
    context: &'a Context<'s>,
}

impl<'a, 's> Parser<'a, 's> {
    fn new(context: &'a Context<'s>)->Parser<'a, 's>{
        Parser{context}
    }
    fn parse(&'a self) -> Result<(), &'s str> {
        Err(&self.context.0[1..])
    }
}

fn parse_context<'a>(context: Context<'a>) -> Result<(), &'a str> {
    Parser::new(&context).parse()
}

fn main() {
    let c = Context("Hello");
    if let Err(r) = parse_context(c) {
        println!("{}", r);
    }
}