Bug: 162331178

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  1. fef27ce Make num-derive available to product and vendor am: 578c2b6ca3 by Matthew Maurer · 3 weeks ago master
  2. 578c2b6 Make num-derive available to product and vendor by Matthew Maurer · 3 weeks ago
  3. 20dff95 Update TEST_MAPPING am: e39b6d2dd3 by Jeff Vander Stoep · 8 weeks ago
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  5. 2fb3d6b Update TEST_MAPPING am: 8ac8cdb21c by David Brazdil · 9 weeks ago

num-derive

crate documentation minimum rustc 1.31 build status

Procedural macros to derive numeric traits in Rust.

Usage

Add this to your Cargo.toml:

[dependencies]
num-traits = "0.2"
num-derive = "0.3"

and this to your crate root:

#[macro_use]
extern crate num_derive;

Then you can derive traits on your own types:

#[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 1.31 and greater.

License

Licensed under either of

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.