chksum_cli/
color.rs

1use clap::builder::PossibleValue;
2use clap::ValueEnum;
3
4#[derive(Clone, Copy, Debug, Eq, PartialEq)]
5pub enum Color {
6    Always,
7    Auto,
8    Never,
9}
10
11impl Color {
12    #[must_use]
13    pub fn as_str(&self) -> &'static str {
14        match self {
15            Self::Always => "always",
16            Self::Auto => "auto",
17            Self::Never => "never",
18        }
19    }
20}
21
22impl ValueEnum for Color {
23    fn from_str(input: &str, ignore_case: bool) -> Result<Self, String> {
24        let input = if ignore_case {
25            input.to_lowercase()
26        } else {
27            input.to_string()
28        };
29        match &input[..] {
30            "auto" => Ok(Self::Auto),
31            "always" => Ok(Self::Always),
32            "never" => Ok(Self::Never),
33            _ => Err("unrecognized option".to_string()),
34        }
35    }
36
37    fn value_variants<'a>() -> &'a [Self] {
38        &[Self::Always, Self::Auto, Self::Never]
39    }
40
41    fn to_possible_value(&self) -> Option<PossibleValue> {
42        let possible_value = PossibleValue::new(self.as_str());
43        Some(possible_value)
44    }
45}
chksum_cli/color.rs

chksum_cli/
color.rs
