macro

Iroha Macros

This crate contains macros and attributes for Iroha projects:

• FromVariant, a macro used for implementing From<Variant> for Enum and TryFrom<Enum> for Variant

Usage

Add the following to the manifest file of your Rust project:

iroha_derive = { git = "https://github.com/hyperledger/iroha/", branch="main" }

Examples

use iroha_derive::FromVariant;

trait MyTrait {}

// Use derive to derive the implementation of `FromVariant`:
#[derive(FromVariant)]
enum Obj {
    Uint(u32),
    Int(i32),
    String(String),
    // You can also skip implementing `From`
    Vec(#[skip_from] Vec<Obj>),
    // You can also skip implementing `From` for item inside containers such as `Box`
    Box(#[skip_container] Box<dyn MyTrait>)
}

// That would help you avoid doing this:
impl<T: Into<Obj>> From<Vec<T>> for Obj {
    fn from(vec: Vec<T>) -> Self {
        // stringify!(
        // ...
        // );
        // todo!()
    }
}