Is there a way to create pseudo default function parameters in rust? I'd like to do something like
pub struct Circular<T> {
raw: Vec<T>,
current: u64
}
impl<T> Circular<T> {
pub fn new(t_raw: Vec<T>, t_current=0: u64) -> Circular<T> {
return Circular { raw: t_raw, current: t_current };
}
I'd like to have the option of settings the current variable, but it won't always be needed to be set. Is this a possible thing to do in Rust?
No, Rust doesn't support default function arguments. You have to define different methods, or in case of struct initialization (your example) you can use the struct update syntax like this:
use std::default::Default;
#[derive(Debug)]
pub struct Sample {
a: u32,
b: u32,
c: u32,
}
impl Default for Sample {
fn default() -> Self {
Sample { a: 2, b: 4, c: 6}
}
}
fn main() {
let s = Sample { c: 23, .. Sample::default() };
println!("{:?}", s);
}
new and new_default? There's no function overloading either right? EDIT: or I could make the current member mandatory as opposed to two functions I guess
