num-derive

Procedural macros to derive numeric traits in Rust.

Usage

Add this to your Cargo.toml:

toml [dependencies] num-traits = "0.2" num-derive = "0.2"

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.

Releases

Release notes are available in RELEASES.md.

Compatibility

The num-derive crate is tested for rustc 1.15 and greater.