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🔍 Вопрос: что выведет этот код на Rust?

fn main() {
let mut v = vec![1, 2, 3];
let first = &v[0];

v.push(4);

println!("First: {}", first);
}

---
✔️ Правильный ответ: Ошибка компиляции
---
🧠 Разбор:
- let first = &v[0];иммутабельная ссылка
- v.push(4);мутабельная операция

Rust запрещает это: нельзя иметь и иммутабельную ссылку, и мутабельную операцию одновременно!

📚 Rust выдаст ошибку компиляции:
error[E0502]: cannot borrow v as mutable because it is also borrowed as immutable

💥 Подвох: в C++, Go или JS это бы сработало.

Rust завернет такое на стадии компиляции

@rust_code



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🔍 Вопрос: что выведет этот код на Rust?


fn main() {
let mut v = vec![1, 2, 3];
let first = &v[0];

v.push(4);

println!("First: {}", first);
}

---
✔️ Правильный ответ: Ошибка компиляции
---
🧠 Разбор:
- let first = &v[0];иммутабельная ссылка
- v.push(4);мутабельная операция

Rust запрещает это: нельзя иметь и иммутабельную ссылку, и мутабельную операцию одновременно!

📚 Rust выдаст ошибку компиляции:
error[E0502]: cannot borrow v as mutable because it is also borrowed as immutable

💥 Подвох: в C++, Go или JS это бы сработало.

Rust завернет такое на стадии компиляции

@rust_code

BY Rust


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