rustHow to use closure as an argument in Rust

Closures can be used as arguments in Rust by using the Fn, FnMut, and FnOnce traits. These traits allow a closure to be passed as an argument to a function. To use a closure as an argument, the closure must be wrapped in one of the traits. For example, the following code shows how to use a closure as an argument to a function:

fn call_closure<F: Fn()>(closure: F) {
    closure();
}

fn main() {
    let closure = || println!("Closure called");
    call_closure(closure);
}

Output example

Closure called

Explanation

The call_closure function takes a generic type F which is bounded by the Fn trait. This means that any type that implements the Fn trait can be passed as an argument to the call_closure function. The closure is then called within the function body using the closure() syntax.

Relevant links

Rust Closures Fn Trait FnMut Trait

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