https://github.com/rust-num/num-derive

Procedural macros to derive numeric traits in Rust
https://github.com/rust-num/num-derive

num-derive rust

Last synced: 3 months ago
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Procedural macros to derive numeric traits in Rust

• Host: GitHub
• URL: https://github.com/rust-num/num-derive
• Owner: rust-num
• License: apache-2.0
• Created: 2017-12-19T01:36:45.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2024-02-06T21:00:52.000Z (12 months ago)
• Last Synced: 2024-10-29T16:24:51.807Z (3 months ago)
• Topics: num-derive, rust
• Language: Rust
• Homepage:
• Size: 1.29 MB
• Stars: 169
• Watchers: 8
• Forks: 25
• Open Issues: 10
• Metadata Files:
  • Readme: README.md
  • License: LICENSE-APACHE

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README

        
# num-derive

[![crate](https://img.shields.io/crates/v/num-derive.svg)](https://crates.io/crates/num-derive)

[![documentation](https://docs.rs/num-derive/badge.svg)](https://docs.rs/num-derive)

[![minimum rustc 1.56](https://img.shields.io/badge/rustc-1.56+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)

[![build status](https://github.com/rust-num/num-derive/workflows/master/badge.svg)](https://github.com/rust-num/num-derive/actions)

Procedural macros to derive numeric traits in Rust.

## Usage

Add this to your `Cargo.toml`:

```toml

[dependencies]

num-traits = "0.2"

num-derive = "0.4"

```

and this to your crate root:

```rust

#[macro_use]

extern crate num_derive;

```

Then you can derive traits on your own types:

```rust

#[derive(FromPrimitive, ToPrimitive)]

enum Color {

    Red,

    Blue,

    Green,

}

```

## Optional features

- **`full-syntax`** — Enables `num-derive` to handle enum discriminants

  represented by complex expressions. Usually can be avoided by

  [utilizing constants], so only use this feature if namespace pollution is

  undesired and [compile time doubling] is acceptable.

[utilizing constants]: https://github.com/rust-num/num-derive/pull/3#issuecomment-359044704

[compile time doubling]: https://github.com/rust-num/num-derive/pull/3#issuecomment-359172588

## Releases

Release notes are available in [RELEASES.md](RELEASES.md).

## Compatibility

The `num-derive` crate is tested for rustc 1.56 and greater.

## License

Licensed under either of

 * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)

 * [MIT license](http://opensource.org/licenses/MIT)

at your option.

### Contribution

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.