1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mfbt/NumericLimits.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,40 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=8 sts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +/* Compatibility with std::numeric_limits<char16_t>. */
1.11 +
1.12 +#ifndef mozilla_NumericLimits_h
1.13 +#define mozilla_NumericLimits_h
1.14 +
1.15 +#include "mozilla/Char16.h"
1.16 +
1.17 +#include <limits>
1.18 +#include <stdint.h>
1.19 +
1.20 +namespace mozilla {
1.21 +
1.22 +/**
1.23 + * The NumericLimits class provides a compatibility layer with std::numeric_limits
1.24 + * for char16_t, otherwise it is exactly the same as std::numeric_limits.
1.25 + * Code which does not need std::numeric_limits<char16_t> should avoid using
1.26 + * NumericLimits.
1.27 + */
1.28 +template<typename T>
1.29 +class NumericLimits : public std::numeric_limits<T>
1.30 +{
1.31 +};
1.32 +
1.33 +#ifdef MOZ_CHAR16_IS_NOT_WCHAR
1.34 +template<>
1.35 +class NumericLimits<char16_t> : public std::numeric_limits<uint16_t>
1.36 +{
1.37 + // char16_t and uint16_t numeric limits should be exactly the same.
1.38 +};
1.39 +#endif
1.40 +
1.41 +} // namespace mozilla
1.42 +
1.43 +#endif /* mozilla_NumericLimits_h */
