rpgn 0.8.1

A crate for parsing PGNs (Portable [Chess] Game Notation).
Documentation 
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use std::fmt::{Display, Formatter};
use std::str::FromStr;
use shakmaty::Color;

/// This is like [`shakmaty::Outcome`], but with an additional variant: [`Outcome::Other`].
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum Outcome {
    Decisive { winner: Color },
    Draw,
    /// In progress, game abandoned, result otherwise unknown, or an invalid value.
    Other,
}

#[cfg(feature = "serde")]
crate::serde_display_from_str!(Outcome);

#[derive(Clone, Debug, PartialEq, Copy, Eq, Hash)]
pub struct ParseError;

impl Display for ParseError {
    fn fmt(&self, f: &mut Formatter) -> Result<(), std::fmt::Error> {
        f.write_str("string did not match any of the following: 1-0, 0-1, 1/2-1/2, *")
    }
}

impl std::error::Error for ParseError {}

impl Display for Outcome {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        f.write_str(match self {
            Self::Draw => "1/2-1/2",
            Self::Other => "*",
            Self::Decisive { winner: Color::White } => "1-0",
            Self::Decisive { winner: Color::Black } => "0-1",
        })
    }
}

impl FromStr for Outcome {
    type Err = ParseError;

    /// # Errors
    /// The string doesn't match any of these:
    /// - `1-0`
    /// - `0-1`
    /// - `1/2-1/2`
    /// - `*`
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s {
            "1-0" => Ok(Self::Decisive { winner: Color::White }),
            "0-1" => Ok(Self::Decisive { winner: Color::Black }),
            "1/2-1/2" => Ok(Self::Draw),
            "*" => Ok(Self::Other),
            _ => Err(ParseError),
        }
    }
}

#[cfg(test)]
#[allow(clippy::unwrap_used)]
mod tests {
    use super::*;
    use pretty_assertions::{assert_eq};
    use test_case::test_case;
    
    #[test_case(Outcome::Draw, "1/2-1/2")]
    #[test_case(Outcome::Other, "*")]
    #[test_case(Outcome::Decisive { winner: Color::White }, "1-0")]
    #[test_case(Outcome::Decisive { winner: Color::Black }, "0-1")]
    fn to_string_from_string(result: Outcome, result_str: &str) {
        assert_eq!(result.to_string(), result_str);
        assert_eq!(Outcome::from_str(result_str).unwrap(), result);
    }
}