Default function arguments in Rust

Question

Is it possible in Rust to create a function with a default argument?

fn add(a: int = 1, b: int = 2) { a + b }

Answer 1

If you are using Rust 1.12 or later, you can at least make function arguments easier to use with Option and into():

fn add>>(a: u32, b: T) -> u32 {
    if let Some(b) = b.into() {
        a + b
    } else {
        a
    }
}

fn main() {
    assert_eq!(add(3, 4), 7);
    assert_eq!(add(8, None), 8);
}