Derive macros for pack-abi Value conversion.

This crate provides #[derive(GraphValue)] which generates implementations of From<T> for Value and TryFrom<Value> for T.

Example

use packr_abi::{GraphValue, Value};

#[derive(GraphValue)]
struct Point {
    x: i64,
    y: i64,
}

let point = Point { x: 10, y: 20 };
let value: Value = point.into();
let back: Point = value.try_into().unwrap();

Crate Path

By default, the macro expects packr_abi to be in scope. For no_std guests using packr_guest, specify the crate path:

use packr_guest::GraphValue;

#[derive(GraphValue)]
#[graph(crate = "packr_guest::composite_abi")]
struct MyState {
    count: i32,
}