Function default_u64

pub const fn default_u64<const V: u64>() -> u64

Allows compact setting u64 field default value.

Example

use serde_aux::prelude::*;

#[derive(serde::Deserialize, Debug)]
struct MyStruct {
    #[serde(default = "default_u64::<30>")]
    default_30: u64,
    #[serde(default)]
    default_zero: u64,
}

let s = r#"{}"#;
let a: MyStruct = serde_json::from_str(s).unwrap();
assert_eq!(a.default_30, 30);
assert_eq!(a.default_zero, 0);