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// These impls for PartialEq, Eq, etc are written by hand. This is
// because the `#[derive()]` would add requirements onto the context
// object that are not needed.
use super::*;
use std::cmp::{Eq, PartialEq};
use std::hash::{Hash, Hasher};
use std::mem;
///////////////////////////////////////////////////////////////////////////
impl<I: Interner> PartialEq for Literal<I> {
fn eq(&self, other: &Literal<I>) -> bool {
match (self, other) {
(Literal::Positive(goal1), Literal::Positive(goal2))
| (Literal::Negative(goal1), Literal::Negative(goal2)) => goal1 == goal2,
_ => false,
}
}
}
impl<I: Interner> Eq for Literal<I> {}
impl<I: Interner> Hash for Literal<I> {
fn hash<H: Hasher>(&self, state: &mut H) {
mem::discriminant(self).hash(state);
match self {
Literal::Positive(goal) | Literal::Negative(goal) => {
goal.hash(state);
}
}
}
}
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