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//LICENSE Portions Copyright 2019-2021 ZomboDB, LLC.
//LICENSE
//LICENSE Portions Copyright 2021-2023 Technology Concepts & Design, Inc.
//LICENSE
//LICENSE Portions Copyright 2023-2023 PgCentral Foundation, Inc. <contact@pgcentral.org>
//LICENSE
//LICENSE All rights reserved.
//LICENSE
//LICENSE Use of this source code is governed by the MIT license that can be found in the LICENSE file.
use core::ops::{Deref, DerefMut};
pub(crate) enum Toast<T>
where
T: Toasty,
{
Stale(T),
Fresh(T),
}
pub(crate) trait Toasty: Sized {
/// Why does it always land butter-side down?
unsafe fn drop_toast(&mut self);
}
impl<T: Toasty> Drop for Toast<T> {
fn drop(&mut self) {
match self {
Toast::Stale(_) => {}
Toast::Fresh(t) => unsafe { t.drop_toast() },
}
}
}
impl<T: Toasty> Deref for Toast<T> {
type Target = T;
fn deref(&self) -> &Self::Target {
match self {
Toast::Stale(t) => t,
Toast::Fresh(t) => t,
}
}
}
impl<T: Toasty> DerefMut for Toast<T> {
fn deref_mut(&mut self) -> &mut Self::Target {
match self {
Toast::Stale(t) => t,
Toast::Fresh(t) => t,
}
}
}