juncture-derive 0.2.0

Proc-macro derive implementation for Juncture State trait
Documentation 
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use proc_macro::TokenStream;
use syn::{DeriveInput, parse_macro_input};

mod state_derive;

/// Derive macro for State trait
///
/// Generates:
/// - Update struct (each field becomes Option<T>)
/// - Field index constants
/// - State trait implementation
#[proc_macro_derive(State, attributes(reducer, state_version, migrate_from, subset_of))]
pub fn derive_state(input: TokenStream) -> TokenStream {
    let input = parse_macro_input!(input as DeriveInput);
    state_derive::derive_state_impl(input)
}

// Rust guideline compliant 2026-05-21