зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
2.3 KiB
C
88 строки
2.3 KiB
C
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef XPCOM_DS_NSTHASHMAP_H_
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#define XPCOM_DS_NSTHASHMAP_H_
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#include "mozilla/Attributes.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/UniquePtr.h"
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#include "nsBaseHashtable.h"
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#include "nsCOMPtr.h"
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#include "nsHashKeys.h"
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#include "nsHashtablesFwd.h"
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#include <type_traits>
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namespace mozilla::detail {
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template <class KeyType>
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struct nsKeyClass {
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// Prevent instantiation with an incomplete KeyType, as std::is_base_of_v
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// would have undefined behaviour then.
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static_assert(sizeof(KeyType) > 0,
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"KeyType must be a complete type (unless there's an explicit "
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"specialization for nsKeyClass<KeyType>)");
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static_assert(std::is_base_of_v<PLDHashEntryHdr, KeyType>,
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"KeyType must inherit from PLDHashEntryHdr (unless there's an "
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"explicit specialization for nsKeyClass<KeyType>)");
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using type = std::conditional_t<std::is_base_of_v<PLDHashEntryHdr, KeyType>,
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KeyType, void>;
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};
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template <typename KeyType>
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struct nsKeyClass<KeyType*> {
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using type = nsPtrHashKey<KeyType>;
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};
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template <>
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struct nsKeyClass<nsCString> {
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using type = nsCStringHashKey;
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};
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// This uses the case-sensitive hash key class, if you want the
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// case-insensitive hash key, use nsStringCaseInsensitiveHashKey explicitly.
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template <>
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struct nsKeyClass<nsString> {
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using type = nsStringHashKey;
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};
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template <>
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struct nsKeyClass<uint32_t> {
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using type = nsUint32HashKey;
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};
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template <>
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struct nsKeyClass<uint64_t> {
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using type = nsUint64HashKey;
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};
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template <>
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struct nsKeyClass<intptr_t> {
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using type = IntPtrHashKey;
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};
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template <>
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struct nsKeyClass<nsCOMPtr<nsISupports>> {
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using type = nsISupportsHashKey;
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};
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template <typename T>
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struct nsKeyClass<RefPtr<T>> {
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using type = nsRefPtrHashKey<T>;
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};
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template <>
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struct nsKeyClass<nsID> {
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using type = nsIDHashKey;
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};
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} // namespace mozilla::detail
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// The actual definition of nsTHashMap is in nsHashtablesFwd.h, since it is a
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// type alias.
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#endif // XPCOM_DS_NSTHASHMAP_H_
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