boost/histogram/detail/relaxed_equal.hpp

// Copyright 2015-2019 Hans Dembinski
//
// Distributed under 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)

#ifndef BOOST_HISTOGRAM_DETAIL_RELAXED_EQUAL_HPP
#define BOOST_HISTOGRAM_DETAIL_RELAXED_EQUAL_HPP

#include <boost/histogram/detail/detect.hpp>
#include <boost/histogram/detail/static_if.hpp>

namespace boost {
namespace histogram {
namespace detail {

template <class T>
constexpr bool relaxed_equal(const T& a, const T& b) noexcept {
  return static_if<has_operator_equal<T>>(
      [](const auto& a, const auto& b) { return a == b; },
      [](const auto&, const auto&) { return true; }, a, b);
}

} // namespace detail
} // namespace histogram
} // namespace boost

#endif

Boost C++ Libraries

boost/histogram/detail/relaxed_equal.hpp