sized-data-derive

Procedural macro implementation for sized-data crate, used with Solana's Anchor framework.

Implementation

Automatically derives the SizedData trait for structs by:

1. Analyzing struct fields at compile time
2. Generating size calculation code for each field
3. Producing a total size implementation

#[derive(SizedData)]
pub struct UserAccount {
    pub authority: Pubkey,    // 32 bytes
    pub counter: u64,         // 8 bytes
}

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

Supported Field Types

• Named fields (struct Example { field: Type })
• Unnamed fields (struct Example(Type))
• Unit structs (struct Example;)

Requirements

• Rust 1.83.0+
• quote = "1.0"
• syn = { version = "1.0", features = ["full"] }

Usage

This crate is typically used as a dependency of sized-data. Direct usage:

[dependencies]
sized_data_derive = "0.1.1"

use sized_data_derive::SizedData;

License

MIT License