import quincy beta 17.1.0

[ceph.git] / ceph / src / boost / boost / histogram / axis / boolean.hpp

diff --git a/ceph/src/boost/boost/histogram/axis/boolean.hpp b/ceph/src/boost/boost/histogram/axis/boolean.hpp
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+// Copyright Hans Dembinski 2020
+//
+// 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_AXIS_BOOLEAN_HPP
+#define BOOST_HISTOGRAM_AXIS_BOOLEAN_HPP
+
+#include <boost/core/nvp.hpp>
+#include <boost/histogram/axis/iterator.hpp>
+#include <boost/histogram/axis/metadata_base.hpp>
+#include <boost/histogram/axis/option.hpp>
+#include <boost/histogram/detail/relaxed_equal.hpp>
+#include <boost/histogram/detail/replace_type.hpp>
+#include <boost/histogram/fwd.hpp>
+#include <string>
+
+namespace boost {
+namespace histogram {
+namespace axis {
+
+/**
+  Discrete axis for boolean data.
+
+  Binning is a pass-though operation with zero cost, making this the
+  fastest possible axis. The axis has no internal state apart from the
+  optional metadata state. The axis has no under- and overflow bins.
+  It cannot grow and cannot be reduced.
+
+  @tparam MetaData type to store meta data.
+ */
+template <class MetaData>
+class boolean : public iterator_mixin<boolean<MetaData>>,
+                public metadata_base_t<MetaData> {
+  using value_type = bool;
+  using metadata_base = metadata_base_t<MetaData>;
+  using metadata_type = typename metadata_base::metadata_type;
+
+public:
+  /** Construct a boolean axis.
+   *
+   * \param meta     description of the axis.
+   */
+  explicit boolean(metadata_type meta = {}) : metadata_base(std::move(meta)) {}
+
+  /// Return index for value argument.
+  index_type index(value_type x) const noexcept { return static_cast<index_type>(x); }
+
+  /// Return value for index argument.
+  value_type value(index_type i) const noexcept { return static_cast<value_type>(i); }
+
+  /// Return bin for index argument.
+  value_type bin(index_type i) const noexcept { return value(i); }
+
+  /// Returns the number of bins, without over- or underflow.
+  index_type size() const noexcept { return 2; }
+
+  /// Whether the axis is inclusive (see axis::traits::is_inclusive).
+  static constexpr bool inclusive() noexcept { return true; }
+
+  /// Returns the options.
+  static constexpr unsigned options() noexcept { return option::none_t::value; }
+
+  template <class M>
+  bool operator==(const boolean<M>& o) const noexcept {
+    return detail::relaxed_equal{}(this->metadata(), o.metadata());
+  }
+
+  template <class M>
+  bool operator!=(const boolean<M>& o) const noexcept {
+    return !operator==(o);
+  }
+
+  template <class Archive>
+  void serialize(Archive& ar, unsigned /* version */) {
+    ar& make_nvp("meta", this->metadata());
+  }
+
+private:
+  template <class M>
+  friend class boolean;
+};
+
+#if __cpp_deduction_guides >= 201606
+
+boolean()->boolean<null_type>;
+
+template <class M>
+boolean(M) -> boolean<detail::replace_type<std::decay_t<M>, const char*, std::string>>;
+
+#endif
+
+} // namespace axis
+} // namespace histogram
+} // namespace boost
+
+#endif // BOOST_HISTOGRAM_AXIS_BOOLEAN_HPP