{"id":57194,"library":"num-derive","title":"num-derive","description":"Procedural macros for numeric conversions and operations.","status":"active","version":"0.4.2","language":"rust","source_language":null,"source_url":"https://github.com/rust-num/num-derive","tags":["numerics","macros","conversion","enum"],"install":[{"cmd":"# Cargo.toml\n[dependencies]\nnum-derive = \"0.4.2\"","lang":"toml","label":"Cargo.toml"},{"cmd":"cargo add num-derive","lang":"bash","label":"cargo add"}],"dependencies":[],"imports":[{"symbol":"FromPrimitive","correct":"use num_derive::FromPrimitive;"}],"quickstart":{"code":"use num_derive::FromPrimitive;\nuse num_traits::FromPrimitive;\n\n#[derive(FromPrimitive)]\nenum Color {\n    Red = 0,\n    Green = 1,\n    Blue = 2,\n}\n\nfn main() {\n    let color = Color::from_i32(1).unwrap();\n    println!(\"{:?}\", color);\n}","lang":"rust","description":"Derive FromPrimitive for an enum to convert integers to enum variants."},"warnings":[{"fix":"Add num-traits as a dependency.","message":"Requires num-traits crate for the trait implementations.","severity":"gotcha","affected_versions":">=0.3.0"}],"env_vars":null,"search_vec":"'convers':8,13 'deriv':3 'enum':14 'macro':5,12 'num':2 'num-der':1 'numer':7,11 'oper':10 'procedur':4","created_at":"2026-06-16T15:32:29.629317+00:00","updated_at":"2026-06-16T15:32:29.629317+00:00","problems":[],"ecosystem":"crates","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":null,"cli_version":null,"type":"library","homepage":"https://github.com/rust-num/num-derive","github":"https://github.com/rust-num/num-derive","docs":"https://docs.rs/num-derive/","changelog":null,"pypi":null,"npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["utility"],"base_url":null,"auth_type":null,"provenance":{"verified_status":null,"verified_at":null,"last_verified":"2026-06-16","next_check":"2026-12-13","install_tag":null}}