// Copyright (C) 2019-2025, Lux Industries, Inc. All rights reserved.
// See the file LICENSE for licensing terms.

package cache

var _ Cacher[struct{}, struct{}] = (*Empty[struct{}, struct{}])(nil)

// Empty is a cache that doesn't store anything.
type Empty[K any, V any] struct{}

func (*Empty[K, V]) Put(K, V) {}

func (*Empty[K, V]) Get(K) (V, bool) {
	var zero V
	return zero, false
}

func (*Empty[K, _]) Evict(K) {}

func (*Empty[_, _]) Flush() {}

func (*Empty[_, _]) Len() int {
	return 0
}

func (*Empty[_, _]) PortionFilled() float64 {
	return 0
}