Macro serde_json_lodash::x_add_x

macro_rules! x_add_x {
    () => { ... };
    ($a:expr $(,)*) => { ... };
    ($a:expr, $b:expr $(,)*) => { ... };
    ($a:expr, $b:expr, $($rest:tt)*) => { ... };
}

Based on x_add_x()

Examples:

#[macro_use] extern crate serde_json_lodash;
use serde_json::Number;
assert_eq!(
  x_add_x!(Number::from(6), Number::from(4)),
  Number::from(10)
);

More examples: