// sample-compile-error.rs: THIS FILE DOES NOT COMPILE, ON PURPOSE.
// Free sample from 99helpers.com/file-types/rs
//
// It holds two of the most common Rust compile errors, so you can check
// how an editor, a CI job or a code viewer reports them. The program is
// otherwise harmless: fixed, it only prints a few lines.
//
// Try it: rustc --edition 2024 sample-compile-error.rs
// Expected: error[E0382] and error[E0502], and no executable.

fn shout(text: String) -> String {
    text.to_uppercase()
}

fn main() {
    // 1. E0382, "borrow of moved value". Passing `greeting` by value moves
    //    it into `shout`, so `main` can't use it afterwards.
    //    Fix: call `shout(greeting.clone())`, or make `shout` take `&str`.
    let greeting = String::from("hello");
    let loud = shout(greeting);
    println!("{loud} (was {greeting})");

    // 2. E0502, "cannot borrow as mutable because it is also borrowed as
    //    immutable". `first` borrows from `numbers`, and `push` may move the
    //    list's contents to a new place in memory while `first` still
    //    points at the old one.
    //    Fix: copy the value out first: `let first = numbers[0];`
    let mut numbers = vec![1, 2, 3];
    let first = &numbers[0];
    numbers.push(4);
    println!("first is {first}");
}