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comparison: mfbt/NumericLimits.h
mfbt/NumericLimits.h
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
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| -1:000000000000 | 0:8f2300cfe8d6 |
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| 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 /* Compatibility with std::numeric_limits<char16_t>. */ | |
| 8 | |
| 9 #ifndef mozilla_NumericLimits_h | |
| 10 #define mozilla_NumericLimits_h | |
| 11 | |
| 12 #include "mozilla/Char16.h" | |
| 13 | |
| 14 #include <limits> | |
| 15 #include <stdint.h> | |
| 16 | |
| 17 namespace mozilla { | |
| 18 | |
| 19 /** | |
| 20 * The NumericLimits class provides a compatibility layer with std::numeric_limits | |
| 21 * for char16_t, otherwise it is exactly the same as std::numeric_limits. | |
| 22 * Code which does not need std::numeric_limits<char16_t> should avoid using | |
| 23 * NumericLimits. | |
| 24 */ | |
| 25 template<typename T> | |
| 26 class NumericLimits : public std::numeric_limits<T> | |
| 27 { | |
| 28 }; | |
| 29 | |
| 30 #ifdef MOZ_CHAR16_IS_NOT_WCHAR | |
| 31 template<> | |
| 32 class NumericLimits<char16_t> : public std::numeric_limits<uint16_t> | |
| 33 { | |
| 34 // char16_t and uint16_t numeric limits should be exactly the same. | |
| 35 }; | |
| 36 #endif | |
| 37 | |
| 38 } // namespace mozilla | |
| 39 | |
| 40 #endif /* mozilla_NumericLimits_h */ |
