ceph/src/boost/libs/stl_interfaces/test/view_tests.hpp

   1 // Copyright (C) 2019 T. Zachary Laine
   2 //
   3 // Distributed under the Boost Software License, Version 1.0. (See
   4 // accompanying file LICENSE_1_0.txt or copy at
   5 // http://www.boost.org/LICENSE_1_0.txt)
   6 #ifndef BOOST_STL_INTERFACES_VIEW_TESTING_HPP
   7 #define BOOST_STL_INTERFACES_VIEW_TESTING_HPP
   8
   9 #include <boost/stl_interfaces/view_interface.hpp>
  10
  11
  12 template<
  13     typename Iterator,
  14     typename Sentinel,
  15     boost::stl_interfaces::element_layout Contiguity>
  16 struct subrange
  17     : boost::stl_interfaces::
  18           view_interface<subrange<Iterator, Sentinel, Contiguity>, Contiguity>
  19 {
  20     subrange() = default;
  21     constexpr subrange(Iterator it, Sentinel s) : first_(it), last_(s) {}
  22
  23     constexpr auto begin() const { return first_; }
  24     constexpr auto end() const { return last_; }
  25
  26 private:
  27     Iterator first_;
  28     Sentinel last_;
  29 };
  30
  31 template<
  32     boost::stl_interfaces::element_layout Contiguity,
  33     typename Iterator,
  34     typename Sentinel>
  35 auto range(Iterator i, Sentinel s)
  36 {
  37     return subrange<Iterator, Sentinel, Contiguity>(i, s);
  38 }
  39
  40 #endif