- enum
- dead_code
- PartialEq
Enumeration colors - functions and String
- Similar example with colors with functions to convert to RGB and from RGB values.
examples/enums/colors-with-functions-using-strings/src/main.rs
#[derive(Debug, PartialEq)] #[allow(dead_code)] enum Color { Red, Green, Blue, White, Black, Other(String), } fn to_rgb(color: &Color) -> String { return match color { Color::Black => String::from("000000"), Color::Red => String::from("ff0000"), Color::Green => String::from("00ff00"), Color::Blue => String::from("0000ff"), Color::White => String::from("ffffff"), Color::Other(val) => val.clone(), } } fn from_rgb(rgb: &str) -> Color { return match rgb.to_ascii_lowercase().as_str() { "000000" => Color::Black, "ff0000" => Color::Red, "00ff00" => Color::Green, "0000ff" => Color::Blue, "ffffff" => Color::White, val => Color::Other(val.to_owned()), } } fn main() { let background = Color::Black; let foreground = Color::White; let ink = Color::Black; let sky = Color::Blue; let other = Color::Other(String::from("4674b9")); let experiment = from_rgb("ab89e2"); println!("{}", background == foreground); println!("{}", background == ink); println!(); for color in [background, foreground, ink, sky, other, experiment] { println!("{} {:?}", to_rgb(&color), color); } }
false true 000000 Black ffffff White 000000 Black 0000ff Blue 4674b9 Other("4674b9") ab89e2 Other("ab89e2")