/usr/include/boost/chrono/chrono_io.hpp is in libboost1.54-dev 1.54.0-4ubuntu3.
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//
// (C) Copyright Howard Hinnant
// (C) Copyright 2010-2011 Vicente J. Botet Escriba
// Use, modification and distribution are subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt).
//
// This code was adapted by Vicente from Howard Hinnant's experimental work
// on chrono i/o under lvm/libc++ to Boost
#ifndef BOOST_CHRONO_CHRONO_IO_HPP
#define BOOST_CHRONO_CHRONO_IO_HPP
#include <boost/chrono/config.hpp>
//#if BOOST_CHRONO_VERSION == 2
//#include <boost/chrono/io/time_point_io.hpp>
//#include <boost/chrono/io/duration_io.hpp>
//#elif BOOST_CHRONO_VERSION == 1
//#include <boost/chrono/io_v1/chrono_io.hpp>
//#endif
#if defined BOOST_CHRONO_DONT_PROVIDES_DEPRECATED_IO_SINCE_V2_0_0
#include <boost/chrono/io/time_point_io.hpp>
#include <boost/chrono/io/duration_io.hpp>
#else
#include <boost/chrono/io_v1/chrono_io.hpp>
#endif
#include <boost/chrono/io/utility/to_string.hpp>
#endif // BOOST_CHRONO_CHRONO_IO_HPP
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