#macro-derive #derive #macro #enums #variant #quickly #wrap

macro quick_from

A derive macro for quickly implementing From on on enum variants that wrap other types

2 unstable releases

0.2.0 Nov 3, 2021
0.1.0 Jun 11, 2021

#69 in #wrap

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Custom license

6KB
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quick_from

A derive macro for quickly implementing From on on enum variants that wrap other types.

Example

#[macro_use]
extern crate quick_from;

use std::{io, fs};

#[derive(QuickFrom)]
enum Error {
    InvalidInput,

    #[quick_from]
    Io(io::Error),
}

fn my_read(s : &str) -> Result<Vec<u8>, Error> {
    if s.len() == 0 {
        return Err(Error::InvalidInput)
    }

    Ok(fs::read(s)?)
}

Dependencies

~1.5MB
~36K SLoC