rust-clippy/tests/ui/wildcard_enum_match_arm.rs

// run-rustfix

#![deny(clippy::wildcard_enum_match_arm)]
#![allow(
    unreachable_code,
    unused_variables,
    dead_code,
    clippy::single_match,
    clippy::wildcard_in_or_patterns,
    clippy::unnested_or_patterns,
    clippy::diverging_sub_expression
)]

use std::io::ErrorKind;

#[derive(Clone, Copy, Debug, Eq, PartialEq)]
enum Color {
    Red,
    Green,
    Blue,
    Rgb(u8, u8, u8),
    Cyan,
}

impl Color {
    fn is_monochrome(self) -> bool {
        match self {
            Color::Red | Color::Green | Color::Blue => true,
            Color::Rgb(r, g, b) => r | g == 0 || r | b == 0 || g | b == 0,
            Color::Cyan => false,
        }
    }
}

fn main() {
    let color = Color::Rgb(0, 0, 127);
    match color {
        Color::Red => println!("Red"),
        _ => eprintln!("Not red"),
    };
    match color {
        Color::Red => println!("Red"),
        _not_red => eprintln!("Not red"),
    };
    let _str = match color {
        Color::Red => "Red".to_owned(),
        not_red => format!("{:?}", not_red),
    };
    match color {
        Color::Red => {},
        Color::Green => {},
        Color::Blue => {},
        Color::Cyan => {},
        c if c.is_monochrome() => {},
        Color::Rgb(_, _, _) => {},
    };
    let _str = match color {
        Color::Red => "Red",
        c @ Color::Green | c @ Color::Blue | c @ Color::Rgb(_, _, _) | c @ Color::Cyan => "Not red",
    };
    match color {
        Color::Rgb(r, _, _) if r > 0 => "Some red",
        _ => "No red",
    };
    match color {
        Color::Red | Color::Green | Color::Blue | Color::Cyan => {},
        Color::Rgb(..) => {},
    };
    let x: u8 = unimplemented!();
    match x {
        0 => {},
        140 => {},
        _ => {},
    };
    // We need to use an enum not defined in this test because non_exhaustive is ignored for the
    // purposes of dead code analysis within a crate.
    let error_kind = ErrorKind::NotFound;
    match error_kind {
        ErrorKind::NotFound => {},
        _ => {},
    }
    match error_kind {
        ErrorKind::NotFound => {},
        ErrorKind::PermissionDenied => {},
        ErrorKind::ConnectionRefused => {},
        ErrorKind::ConnectionReset => {},
        ErrorKind::ConnectionAborted => {},
        ErrorKind::NotConnected => {},
        ErrorKind::AddrInUse => {},
        ErrorKind::AddrNotAvailable => {},
        ErrorKind::BrokenPipe => {},
        ErrorKind::AlreadyExists => {},
        ErrorKind::WouldBlock => {},
        ErrorKind::InvalidInput => {},
        ErrorKind::InvalidData => {},
        ErrorKind::TimedOut => {},
        ErrorKind::WriteZero => {},
        ErrorKind::Interrupted => {},
        ErrorKind::Other => {},
        ErrorKind::UnexpectedEof => {},
        ErrorKind::Unsupported => {},
        ErrorKind::OutOfMemory => {},
        _ => {},
    }
}