Derive Macro StorageLayout

#[derive(StorageLayout)]

Derives ink::storage’s StorageLayout trait for the given struct or enum.

Examples

use ink_metadata::layout::Layout::Struct;
use ink::storage::traits::StorageLayout;

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

let key = 0x123;
let mut value = NamedFields {
    a: 123,
    b: [22; 32],
};

if let Struct(layout) = <NamedFields as StorageLayout>::layout(&key) {
    assert_eq!(*layout.fields()[0].name(), "a");
    assert_eq!(*layout.fields()[1].name(), "b");
}