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rustlings-exercises-completed/exercises/lifetimes/lifetimes2.rs

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// lifetimes2.rs
//
// So if the compiler is just validating the references passed
// to the annotated parameters and the return type, what do
// we need to change?
//
// Execute `rustlings hint lifetimes2` or use the `hint` watch subcommand for a hint.
fn longest<'a>(x: &'a str, y: &'a str) -> &'a str {
if x.len() > y.len() {
x
} else {
y
}
}
fn main() {
let string1 = String::from("long string is long");
let result;
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let string2 = String::from("xyz");
result = longest(string1.as_str(), string2.as_str());
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println!("The longest string is '{}'", result);
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}