Derive Macro ink_storage_derive::SpreadLayout

#[derive(SpreadLayout)]

Derives ink_storage’s SpreadLayout trait for the given struct or enum.

Examples

use ink_primitives::Key;
use ink_storage::traits::{
    SpreadLayout,
    push_spread_root,
    pull_spread_root,
};

#[derive(SpreadLayout)]
struct NamedFields {
    a: u32,
    b: [u32; 32],
}

let value = NamedFields {
    a: 123,
    b: [22; 32],
};

push_spread_root(&value, &mut Key::from([0x42; 32]));
let value2: NamedFields = pull_spread_root(&mut Key::from([0x42; 32]));
assert_eq!(value.a, value2.a);