//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <chrono>
// duration
// duration& operator+=(const duration& d);
#include<chrono>#include<cassert>intmain(){std::chrono::secondss(3);s+=std::chrono::seconds(2);assert(s.count()==5);s+=std::chrono::minutes(2);assert(s.count()==125);}