Derive Macro SizedData

#[derive(SizedData)]

Derives the SizedData trait for structs.

Implementation Details

The macro generates a size() implementation that:

1. Sums the sizes of all fields using their SizedData implementations
2. Works with named fields, tuple structs, and unit structs

Example Generated Code

struct UserAccount {
    authority: Pubkey,
    counter: u64,
}

impl SizedData for UserAccount {
    fn size() -> usize {
        <Pubkey as SizedData>::size() +
        <u64 as SizedData>::size()
    }
}

Panics

Panics if used on enums or unions - only structs are supported.