rust Currying change a multiple argument function into a function where some of the arguments are preset.

Currying is a technique used in functional programming to transform a function with multiple arguments into a sequence of functions, each taking one argument. This allows you to partially apply arguments to a function, creating a new function with some arguments already preset.

In Rust, you can achieve currying using closures and the move keyword. Here's an example:

fn add(a: i32) -> impl Fn(i32) -> i32 {
    move |b| a + b
}

fn main() {
    let add_five = add(5);
    let result = add_five(3);
    println!("Result: {}", result); // Output: Result: 8
}

In this example, the add function takes an argument a and returns a closure that takes another argument b and returns the sum of a and b. By calling add(5), we create a new function add_five where a is preset to 5. We can then call add_five(3) to get the result 8.

This is a basic example of currying in Rust. You can apply the same technique to functions with more arguments by chaining closures together.