1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
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)
}
|
