#pragma once

// Copyright 2016 Google Inc.

// Copyright Envoy Project Authors

// SPDX-License-Identifier: Apache-2.0

#pragma once

#include <functional>

#include "absl/container/flat_hash_map.h" // for hash<>

namespace Envoy {

namespace SimpleLruCache {

namespace internal {

template <typename T> struct SimpleLRUHash : public std::hash<T> {};

} // namespace internal

template <typename Key, typename Value, typename H = internal::SimpleLRUHash<Key>,

          typename EQ = std::equal_to<Key>>

class SimpleLRUCache;

// Deleter is a functor that defines how to delete a Value*. That is, it

// contains a public method:

//  operator() (Value* value)

// See example in the associated unittest.

template <typename Key, typename Value, typename Deleter, typename H = internal::SimpleLRUHash<Key>,

          typename EQ = std::equal_to<Key>>

class SimpleLRUCacheWithDeleter;

} // namespace SimpleLruCache

} // namespace Envoy