Procedurals

Collection of basic proc-macros

IntoEnum

#[macro_use]
extern crate procedurals;

struct A {}
struct B {}

#[derive(IntoEnum)] // derives From<A> and From<B> for E
enum E {
    A(A),
    B(B),
}

EnumError

#[macro_use]
extern crate procedurals;

use std::{io, fmt};

#[derive(Debug, EnumError)] // EnumError derives From<*>, fmt::Display and error::Error
pub enum Error {
    IO(io::Error),
    Fmt(fmt::Error),
}

fn io_error() -> Result<(), io::Error> {
    Ok(())
}

fn fmt_error() -> Result<(), fmt::Error> {
    Ok(())
}

fn merged_error() -> Result<(), Error> {
    io_error()?;
    fmt_error()?;
    Ok(())
}