use super::JsValue;
use crate::builtins::Number;
use std::hash::{Hash, Hasher};
impl PartialEq for JsValue {
fn eq(&self, other: &Self) -> bool {
Self::same_value_zero(self, other)
}
}
impl Eq for JsValue {}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
struct UndefinedHashable;
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
struct NullHashable;
#[derive(Debug, Clone, Copy)]
struct RationalHashable(f64);
impl PartialEq for RationalHashable {
#[inline]
fn eq(&self, other: &Self) -> bool {
Number::same_value(self.0, other.0)
}
}
impl Eq for RationalHashable {}
impl Hash for RationalHashable {
#[inline]
fn hash<H: Hasher>(&self, state: &mut H) {
self.0.to_bits().hash(state);
}
}
impl Hash for JsValue {
fn hash<H: Hasher>(&self, state: &mut H) {
match self {
Self::Undefined => UndefinedHashable.hash(state),
Self::Null => NullHashable.hash(state),
Self::String(ref string) => string.hash(state),
Self::Boolean(boolean) => boolean.hash(state),
Self::Integer(integer) => RationalHashable(f64::from(*integer)).hash(state),
Self::BigInt(ref bigint) => bigint.hash(state),
Self::Rational(rational) => RationalHashable(*rational).hash(state),
Self::Symbol(ref symbol) => Hash::hash(symbol, state),
Self::Object(ref object) => std::ptr::hash(object.as_ref(), state),
}
}
}