xpcom/ds/nsTHashMap.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef XPCOM_DS_NSTHASHMAP_H_
   8 #define XPCOM_DS_NSTHASHMAP_H_
   9
  10 #include "mozilla/Attributes.h"
  11 #include "mozilla/RefPtr.h"
  12 #include "mozilla/UniquePtr.h"
  13 #include "nsBaseHashtable.h"
  14 #include "nsCOMPtr.h"
  15 #include "nsHashKeys.h"
  16 #include "nsHashtablesFwd.h"
  17 #include <type_traits>
  18
  19 namespace mozilla::detail {
  20 template <class KeyType>
  21 struct nsKeyClass<
  22     KeyType, std::enable_if_t<sizeof(KeyType) &&
  23                               std::is_base_of_v<PLDHashEntryHdr, KeyType>>> {
  24   using type = KeyType;
  25 };
  26
  27 template <typename KeyType>
  28 struct nsKeyClass<KeyType*> {
  29   using type = nsPtrHashKey<KeyType>;
  30 };
  31
  32 template <>
  33 struct nsKeyClass<nsCString> {
  34   using type = nsCStringHashKey;
  35 };
  36
  37 // This uses the case-sensitive hash key class, if you want the
  38 // case-insensitive hash key, use nsStringCaseInsensitiveHashKey explicitly.
  39 template <>
  40 struct nsKeyClass<nsString> {
  41   using type = nsStringHashKey;
  42 };
  43
  44 template <typename KeyType>
  45 struct nsKeyClass<KeyType, std::enable_if_t<std::is_integral_v<KeyType> ||
  46                                             std::is_enum_v<KeyType>>> {
  47   using type = nsIntegralHashKey<KeyType>;
  48 };
  49
  50 template <>
  51 struct nsKeyClass<nsCOMPtr<nsISupports>> {
  52   using type = nsISupportsHashKey;
  53 };
  54
  55 template <typename T>
  56 struct nsKeyClass<RefPtr<T>> {
  57   using type = nsRefPtrHashKey<T>;
  58 };
  59
  60 template <>
  61 struct nsKeyClass<nsID> {
  62   using type = nsIDHashKey;
  63 };
  64
  65 }  // namespace mozilla::detail
  66
  67 // The actual definition of nsTHashMap is in nsHashtablesFwd.h, since it is a
  68 // type alias.
  69
  70 #endif  // XPCOM_DS_NSTHASHMAP_H_