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use std::fmt::Debug;
pub trait KeyValuePair {
type Type: Debug + Copy + Clone + PartialEq + Eq + std::hash::Hash;
type Key: Debug + Clone + PartialEq + Eq + std::hash::Hash;
type Value: Debug + Clone + Default + PartialEq + Eq;
type ValueRef<'l>: Debug + Copy + Clone + PartialEq + Eq + 'l
where
Self: 'l;
type ValueRefMut<'l>: Debug + PartialEq + Eq + 'l
where
Self: 'l;
fn ty(&self) -> Self::Type;
fn key(&self) -> Self::Key;
fn value(&self) -> Self::Value;
fn value_ref(&self) -> Self::ValueRef<'_>;
fn value_mut(&mut self) -> Self::ValueRefMut<'_>;
fn from_key_and_value(key: Self::Key, value: Self::Value) -> Self;
fn from_key_and_value_ref(key: Self::Key, value_ref: Self::ValueRef<'_>) -> Self;
fn into_key_and_value(self) -> (Self::Key, Self::Value);
}
/// Derives the [`KeyValuePair`][trait@KeyValuePair] trait for a enum. Each variant need to
/// have a `value` field which becomes part of the value enum and all remaining fields become
/// part of the key.
///
/// Assuming the enum is called `Abc` it exposes `AbcKey` and `AbcValue` types for it too. The
/// key enum will have [`Debug`], [`Clone`], [`PartialEq`], [`Eq`], and [`Hash`] derived. The
/// value enum will have [`Debug`] and [`Clone`] derived. It's expected that all fields
/// implement these traits.
pub use turbo_tasks_macros::KeyValuePair;
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