rustHow to create a generator iterator in Rust?

Creating a generator iterator in Rust is a simple process. To create a generator iterator, you must first define a function that returns a yield expression. The yield expression will return a value each time the generator is called.

Example code

fn generator() -> impl Iterator<Item = i32> {
    let mut i = 0;
    loop {
        yield i;
        i += 1;
    }
}

let mut gen = generator();
println!("{}", gen.next().unwrap());

Output example

0

Code explanation

1. fn generator() -> impl Iterator<Item = i32>: This line defines a function called generator that returns an iterator of type i32.
2. let mut i = 0: This line declares a mutable variable i and sets its initial value to 0.
3. loop {: This line starts an infinite loop.
4. yield i: This line yields the value of i each time the generator is called.
5. i += 1: This line increments the value of i by 1 each time the loop is executed.
6. let mut gen = generator(): This line creates a mutable variable gen and assigns it the value returned by the generator function.
7. println!("{}", gen.next().unwrap()): This line prints the value returned by the next method of the gen variable.

Helpful links

• Rust Generators
• Rust Iterators

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