chromium/components/prefs/pref_value_store.h

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_PREFS_PREF_VALUE_STORE_H_
#define COMPONENTS_PREFS_PREF_VALUE_STORE_H_

#include <array>
#include <functional>
#include <map>
#include <memory>
#include <string>
#include <string_view>
#include <type_traits>
#include <vector>

#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/ref_counted.h"
#include "base/values.h"
#include "components/prefs/pref_store.h"
#include "components/prefs/prefs_export.h"

class PrefNotifier;
class PrefStore;

// The PrefValueStore manages various sources of values for Preferences
// (e.g., configuration policies, extensions, and user settings). It returns
// the value of a Preference from the source with the highest priority, and
// allows setting user-defined values for preferences that are not managed.
//
// Unless otherwise explicitly noted, all of the methods of this class must
// be called on the UI thread.
class COMPONENTS_PREFS_EXPORT PrefValueStore { … };

namespace std {

template <>
struct hash<PrefValueStore::PrefStoreType> { … };

}  // namespace std

#endif  // COMPONENTS_PREFS_PREF_VALUE_STORE_H_