Literals.h (1092B)
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 /* Helpers for units on integer literals. */ 8 9 #ifndef mozilla_Literals_h 10 #define mozilla_Literals_h 11 12 #include <cstddef> 13 14 // User-defined literals to make constants more legible. Use them by 15 // appending them to literals such as: 16 // 17 // size_t page_size = 4_KiB; 18 // 19 constexpr size_t operator""_KiB(unsigned long long int aNum) { 20 return size_t(aNum) * 1024; 21 } 22 23 constexpr size_t operator""_KiB(long double aNum) { 24 return size_t(aNum * 1024); 25 } 26 27 constexpr size_t operator""_MiB(unsigned long long int aNum) { 28 return size_t(aNum) * 1024_KiB; 29 } 30 31 constexpr size_t operator""_MiB(long double aNum) { 32 return size_t(aNum * 1024_KiB); 33 } 34 35 constexpr double operator""_percent(long double aPercent) { 36 return double(aPercent) / 100; 37 } 38 39 #endif /* ! mozilla_Literals_h */