mfbt/NullPtr.h
author Masayuki Nakano <masayuki@d-toybox.com>
Thu, 16 Mar 2017 16:26:43 +0900
changeset 398554 8e72178c3893c377972209cccd2e561e1ec06c7d
parent 285938 91d6e262b662a0b4e47358665e222d3927337af9
child 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1339331 TextEventDispatcher should replace \r in composition string with \n and TextComposition should allow to input \n with composition events r=m_kato According to ATOK's behavior, IME may send different line breaker from its platform's standard. Therefore, we should treat \r as \n too. Additionally, currently, TextComposition doesn't allow to input \n with composition. However, this was added for preventing to see odd control characters as boxes with code point. Therefore, we should allow \n for IMEs. (It was allowed, this limitation is unexpected when I reviewed the patch to reject control characters in TextComposition.) MozReview-Commit-ID: DzGSMgp89Av

/* -*- 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 */