| use winnow::prelude::*; |
| use winnow::token::take_while; |
| |
| #[derive(Debug, Eq, PartialEq)] |
| pub struct Color { |
| pub red: u8, |
| pub green: u8, |
| pub blue: u8, |
| } |
| |
| impl std::str::FromStr for Color { |
| // The error must be owned |
| type Err = String; |
| |
| fn from_str(s: &str) -> Result<Self, Self::Err> { |
| hex_color.parse(s).map_err(|e| e.to_string()) |
| } |
| } |
| |
| pub fn hex_color(input: &mut &str) -> PResult<Color> { |
| let _ = "#".parse_next(input)?; |
| let (red, green, blue) = (hex_primary, hex_primary, hex_primary).parse_next(input)?; |
| |
| Ok(Color { red, green, blue }) |
| } |
| |
| fn hex_primary(input: &mut &str) -> PResult<u8> { |
| take_while(2, |c: char| c.is_ascii_hexdigit()) |
| .try_map(|input| u8::from_str_radix(input, 16)) |
| .parse_next(input) |
| } |
