llvm/llvm/include/llvm/Support/Duration.h

//===--- Duration.h - wrapper around std::chrono::Duration ------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
//  The sole purpose of this file is to avoid the dependency on <chrono> in
//  raw_ostream.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_DURATION_H
#define LLVM_SUPPORT_DURATION_H

#include <chrono>

namespace llvm {
class Duration { … };
}

#endif