ceph/src/boost/libs/histogram/test/utility_histogram.hpp

   1 // Copyright 2018 Hans Dembinski
   2 //
   3 // Distributed under the Boost Software License, Version 1.0.
   4 // (See accompanying file LICENSE_1_0.txt
   5 // or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #ifndef BOOST_HISTOGRAM_TEST_UTILITY_HISTOGRAM_HPP
   8 #define BOOST_HISTOGRAM_TEST_UTILITY_HISTOGRAM_HPP
   9
  10 #include <boost/histogram/axis/category.hpp>
  11 #include <boost/histogram/axis/integer.hpp>
  12 #include <boost/histogram/axis/regular.hpp>
  13 #include <boost/histogram/axis/variable.hpp>
  14 #include <boost/histogram/axis/variant.hpp>
  15 #include <boost/histogram/make_histogram.hpp>
  16 #include <boost/mp11/algorithm.hpp>
  17 #include <type_traits>
  18 #include <vector>
  19
  20 namespace boost {
  21 namespace histogram {
  22
  23 template <class... Ts>
  24 auto make_axis_vector(const Ts&... ts) {
  25   // make sure the variant is never trivial (contains only one type)
  26   using R = axis::regular<double, boost::use_default, axis::null_type>;
  27   using I = axis::integer<int, axis::null_type, axis::option::none_t>;
  28   using V = axis::variable<double, axis::null_type>;
  29   using C = axis::category<int, axis::null_type>;
  30   using Var = boost::mp11::mp_unique<axis::variant<Ts..., R, I, V, C>>;
  31   return std::vector<Var>({Var(ts)...});
  32 }
  33
  34 struct static_tag : std::false_type {};
  35 struct dynamic_tag : std::true_type {};
  36
  37 template <class... Axes>
  38 auto make(static_tag, const Axes&... axes) {
  39   return make_histogram(axes...);
  40 }
  41
  42 template <class S, class... Axes>
  43 auto make_s(static_tag, S&& s, const Axes&... axes) {
  44   return make_histogram_with(s, axes...);
  45 }
  46
  47 template <class... Axes>
  48 auto make(dynamic_tag, const Axes&... axes) {
  49   return make_histogram(make_axis_vector(axes...));
  50 }
  51
  52 template <class S, class... Axes>
  53 auto make_s(dynamic_tag, S&& s, const Axes&... axes) {
  54   return make_histogram_with(s, make_axis_vector(axes...));
  55 }
  56
  57 } // namespace histogram
  58 } // namespace boost
  59
  60 #endif