io-enum

Crates.ioio-enum
lib.rsio-enum
version1.1.3
sourcesrc
created_at2019-02-03 08:45:08.09727
updated_at2024-01-27 12:23:28.937423
description#[derive(Read, Write, Seek, BufRead)] for enums.
homepage
repositoryhttps://github.com/taiki-e/io-enum
max_upload_size
id112333
size34,495
Taiki Endo (taiki-e)

documentation

README

io-enum

crates.io docs.rs license rust version github actions

#[derive(Read, Write, Seek, BufRead)] for enums.

Usage

Add this to your Cargo.toml:

[dependencies]
io-enum = "1"

Compiler support: requires rustc 1.56+

Examples

use std::{
    fs::File,
    io::{self, Write},
    path::Path,
};

use io_enum::*;

#[derive(Read, Write, Seek, BufRead)]
enum Either<A, B> {
    A(A),
    B(B),
}

fn func(path: Option<&Path>) -> impl Write {
    if let Some(path) = path {
        Either::A(File::open(path).unwrap())
    } else {
        Either::B(io::stdout())
    }
}

See auto_enums crate for how to automate patterns like this.

Supported traits

Related Projects

  • auto_enums: A library for to allow multiple return types by automatically generated enum.
  • derive_utils: A procedural macro helper for easily writing derives macros for enums.
  • iter-enum: #[derive(Iterator, DoubleEndedIterator, ExactSizeIterator, FusedIterator, Extend)] for enums.

License

Licensed under either of Apache License, Version 2.0 or MIT license at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

Commit count: 307

cargo fmt