// Copyright 2015-2017 Hans Dembinski
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_HISTOGRAM_ACCUMULATORS_OSTREAM_HPP
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#define BOOST_HISTOGRAM_ACCUMULATORS_OSTREAM_HPP
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#include <boost/histogram/detail/counting_streambuf.hpp>
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#include <boost/histogram/fwd.hpp>
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#include <ios>
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/**
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\file boost/histogram/accumulators/ostream.hpp
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Simple streaming operators for the builtin accumulator types.
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The text representation is not guaranteed to be stable between versions of
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Boost.Histogram. This header is only included by
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[boost/histogram/ostream.hpp](histogram/reference.html#header.boost.histogram.ostream_hpp).
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To use your own, include your own implementation instead of this header and do not
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include
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[boost/histogram/ostream.hpp](histogram/reference.html#header.boost.histogram.ostream_hpp).
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*/
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#ifndef BOOST_HISTOGRAM_DOXYGEN_INVOKED
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namespace boost {
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namespace histogram {
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namespace detail {
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template <class CharT, class Traits, class T>
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std::basic_ostream<CharT, Traits>& handle_nonzero_width(
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std::basic_ostream<CharT, Traits>& os, const T& x) {
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const auto w = os.width();
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os.width(0);
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std::streamsize count = 0;
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{
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auto g = make_count_guard(os, count);
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os << x;
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}
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if (os.flags() & std::ios::left) {
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os << x;
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for (auto i = count; i < w; ++i) os << os.fill();
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} else {
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for (auto i = count; i < w; ++i) os << os.fill();
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os << x;
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}
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return os;
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}
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} // namespace detail
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namespace accumulators {
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template <class CharT, class Traits, class U>
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std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os,
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const count<U>& x) {
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return os << x.value();
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}
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template <class CharT, class Traits, class U>
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std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os,
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const sum<U>& x) {
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if (os.width() == 0) return os << "sum(" << x.large() << " + " << x.small() << ")";
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return detail::handle_nonzero_width(os, x);
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}
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template <class CharT, class Traits, class U>
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std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os,
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const weighted_sum<U>& x) {
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if (os.width() == 0)
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return os << "weighted_sum(" << x.value() << ", " << x.variance() << ")";
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return detail::handle_nonzero_width(os, x);
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}
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template <class CharT, class Traits, class U>
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std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os,
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const mean<U>& x) {
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if (os.width() == 0)
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return os << "mean(" << x.count() << ", " << x.value() << ", " << x.variance() << ")";
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return detail::handle_nonzero_width(os, x);
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}
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template <class CharT, class Traits, class U>
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std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os,
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const weighted_mean<U>& x) {
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if (os.width() == 0)
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return os << "weighted_mean(" << x.sum_of_weights() << ", " << x.value() << ", "
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<< x.variance() << ")";
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return detail::handle_nonzero_width(os, x);
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}
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template <class CharT, class Traits, class T>
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std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os,
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const thread_safe<T>& x) {
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os << x.load();
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return os;
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}
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} // namespace accumulators
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} // namespace histogram
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} // namespace boost
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#endif // BOOST_HISTOGRAM_DOXYGEN_INVOKED
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#endif
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