UniquePtr.h (1547B)
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 js_UniquePtr_h 8 #define js_UniquePtr_h 9 10 #include "mozilla/UniquePtr.h" 11 12 #include "js/Utility.h" 13 14 namespace js { 15 16 // Replacement for mozilla::UniquePtr that defaults to JS::DeletePolicy. 17 template <typename T, typename D = JS::DeletePolicy<T>> 18 using UniquePtr = mozilla::UniquePtr<T, D>; 19 20 namespace detail { 21 22 template <typename T> 23 struct UniqueSelector { 24 typedef UniquePtr<T> SingleObject; 25 }; 26 27 template <typename T> 28 struct UniqueSelector<T[]> { 29 typedef UniquePtr<T[]> UnknownBound; 30 }; 31 32 template <typename T, decltype(sizeof(int)) N> 33 struct UniqueSelector<T[N]> { 34 typedef UniquePtr<T[N]> KnownBound; 35 }; 36 37 } // namespace detail 38 39 // Replacement for mozilla::MakeUnique that correctly calls js_new and produces 40 // a js::UniquePtr. 41 template <typename T, typename... Args> 42 typename detail::UniqueSelector<T>::SingleObject MakeUnique(Args&&... aArgs) { 43 return UniquePtr<T>(js_new<T>(std::forward<Args>(aArgs)...)); 44 } 45 46 template <typename T> 47 typename detail::UniqueSelector<T>::UnknownBound MakeUnique( 48 decltype(sizeof(int)) aN) = delete; 49 50 template <typename T, typename... Args> 51 typename detail::UniqueSelector<T>::KnownBound MakeUnique(Args&&... aArgs) = 52 delete; 53 54 } // namespace js 55 56 #endif /* js_UniquePtr_h */