1 use winnow::prelude::*;
2
3 mod parser;
4
5 use parser::hex_color;
6
main() -> Result<(), lexopt::Error>7 fn main() -> Result<(), lexopt::Error> {
8 let args = Args::parse()?;
9
10 let input = args.input.as_deref().unwrap_or("#AAAAAA");
11
12 println!("{input} =");
13 match hex_color.parse(input) {
14 Ok(result) => {
15 println!(" {result:?}");
16 }
17 Err(err) => {
18 println!(" {err}");
19 }
20 }
21
22 Ok(())
23 }
24
25 #[derive(Default)]
26 struct Args {
27 input: Option<String>,
28 }
29
30 impl Args {
parse() -> Result<Self, lexopt::Error>31 fn parse() -> Result<Self, lexopt::Error> {
32 use lexopt::prelude::*;
33
34 let mut res = Args::default();
35
36 let mut args = lexopt::Parser::from_env();
37 while let Some(arg) = args.next()? {
38 match arg {
39 Value(input) => {
40 res.input = Some(input.string()?);
41 }
42 _ => return Err(arg.unexpected()),
43 }
44 }
45 Ok(res)
46 }
47 }
48
49 #[test]
parse_color()50 fn parse_color() {
51 assert_eq!(
52 hex_color.parse_peek("#2F14DF"),
53 Ok((
54 "",
55 parser::Color {
56 red: 47,
57 green: 20,
58 blue: 223,
59 }
60 ))
61 );
62 }
63