igs 0.1.4

The library for for solving impartial games.
Documentation 
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/// Optional information about outcome.
pub trait OptionalOutcome: Copy {
    #[inline(always)] fn is_winning(self) -> bool { false }
    #[inline(always)] fn is_losing(self) -> bool { false }
}

impl OptionalOutcome for () {}

impl OptionalOutcome for Option<bool> {
    #[inline(always)] fn is_winning(self) -> bool { self == Some(true) }
    #[inline(always)] fn is_losing(self) -> bool { self == Some(false) }
}