|  | /* | 
|  | * Copyright (C) 2016 The Android Open Source Project | 
|  | * | 
|  | * Licensed under the Apache License, Version 2.0 (the "License"); | 
|  | * you may not use this file except in compliance with the License. | 
|  | * You may obtain a copy of the License at | 
|  | * | 
|  | *      http://www.apache.org/licenses/LICENSE-2.0 | 
|  | * | 
|  | * Unless required by applicable law or agreed to in writing, software | 
|  | * distributed under the License is distributed on an "AS IS" BASIS, | 
|  | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 
|  | * See the License for the specific language governing permissions and | 
|  | * limitations under the License. | 
|  | */ | 
|  |  | 
|  | #pragma once | 
|  |  | 
|  | #include <chrono> | 
|  |  | 
|  | #if defined(_WIN32) | 
|  | // We don't have C++14 on Windows yet. | 
|  | // Reimplement std::chrono_literals ourselves until we do. | 
|  |  | 
|  | // Silence the following warning (which gets promoted to an error): | 
|  | // error: literal operator suffixes not preceded by ‘_’ are reserved for future standardization | 
|  | #pragma GCC system_header | 
|  |  | 
|  | constexpr std::chrono::seconds operator"" s(unsigned long long s) { | 
|  | return std::chrono::seconds(s); | 
|  | } | 
|  |  | 
|  | constexpr std::chrono::duration<long double> operator"" s(long double s) { | 
|  | return std::chrono::duration<long double>(s); | 
|  | } | 
|  |  | 
|  | constexpr std::chrono::milliseconds operator"" ms(unsigned long long ms) { | 
|  | return std::chrono::milliseconds(ms); | 
|  | } | 
|  |  | 
|  | constexpr std::chrono::duration<long double, std::milli> operator"" ms(long double ms) { | 
|  | return std::chrono::duration<long double, std::milli>(ms); | 
|  | } | 
|  | #else | 
|  | using namespace std::chrono_literals; | 
|  | #endif |