/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ /* Implements a mozilla::IsNullPointer<T> type trait. */ #ifndef mozilla_NullPtr_h #define mozilla_NullPtr_h #include "mozilla/TypeTraits.h" namespace mozilla { /** * IsNullPointer<T>::value is true iff T is decltype(nullptr). * * Ideally this would be in TypeTraits.h, but C++11 omitted std::is_null_pointer * (fixed in C++14), so in the interests of easing a switch to <type_traits>, * this trait lives elsewhere. */ template<typename T> struct IsNullPointer : FalseType {}; template<> struct IsNullPointer<decltype(nullptr)> : TrueType {}; } // namespace mozilla #endif /* mozilla_NullPtr_h */