Capturing Environment with 'move' Closures

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Capturing Environment with 'move' Closures

The 'move' keyword forces a closure to take ownership of the variables it captures from the environment, rather than just borrowing them. This is often required when passing closures to new threads.

snippet.rs
rust
fn main() {
    let data = vec![1, 2, 3];
    
    let closure = move |x: i32| {
        println!("Data from environment: {:?}", data);
        data.contains(&x)
    };
 
    println!("Result: {}", closure(2));
    // println!("{:?}", data); // Error: value moved
}

Breakdown

move |x: i32|

Indicates that the closure takes ownership of captured variables.

data.contains(&x)

The closure uses the captured 'data' vector which has been moved into its scope.

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Capturing Environment with 'move' Closures

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