ceph/src/boost/libs/hof/test/rotate.cpp

   1 /*=============================================================================
   2     Copyright (c) 2017 Paul Fultz II
   3     rotate.cpp
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7 #include <boost/hof/rotate.hpp>
   8 #include <boost/hof/placeholders.hpp>
   9 #include <boost/hof/compose.hpp>
  10 #include <boost/hof/repeat.hpp>
  11 #include "test.hpp"
  12
  13 struct head
  14 {
  15     template<class T, class... Ts>
  16     constexpr T operator()(T x, Ts&&...) const
  17     BOOST_HOF_RETURNS_DEDUCE_NOEXCEPT(x)
  18     {
  19         return x;
  20     }
  21 };
  22
  23 #if BOOST_HOF_HAS_NOEXCEPT_DEDUCTION
  24 BOOST_HOF_TEST_CASE()
  25 {
  26     static_assert(noexcept(boost::hof::rotate(head{})(1, 2, 3, 4)), "noexcept rotate");
  27     static_assert(noexcept(boost::hof::repeat(std::integral_constant<int, 5>{})(boost::hof::rotate)(head{})(1, 2, 3, 4, 5, 6, 7, 8, 9)), "noexcept rotate");
  28 }
  29 #endif
  30
  31 BOOST_HOF_TEST_CASE()
  32 {
  33     BOOST_HOF_TEST_CHECK(2 == boost::hof::rotate(head{})(1, 2, 3, 4));
  34     BOOST_HOF_STATIC_TEST_CHECK(2 == boost::hof::rotate(head{})(1, 2, 3, 4));
  35 }
  36
  37 BOOST_HOF_TEST_CASE()
  38 {
  39     BOOST_HOF_TEST_CHECK(3 == boost::hof::compose(boost::hof::rotate, boost::hof::rotate)(head{})(1, 2, 3, 4));
  40     BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::compose(boost::hof::rotate, boost::hof::rotate)(head{})(1, 2, 3, 4));
  41 }
  42
  43 BOOST_HOF_TEST_CASE()
  44 {
  45     BOOST_HOF_TEST_CHECK(6 == boost::hof::repeat(std::integral_constant<int, 5>{})(boost::hof::rotate)(head{})(1, 2, 3, 4, 5, 6, 7, 8, 9));
  46     BOOST_HOF_STATIC_TEST_CHECK(6 == boost::hof::repeat(std::integral_constant<int, 5>{})(boost::hof::rotate)(head{})(1, 2, 3, 4, 5, 6, 7, 8, 9));
  47 }
  48
  49 BOOST_HOF_TEST_CASE()
  50 {
  51     BOOST_HOF_TEST_CHECK(3 == boost::hof::rotate(boost::hof::_ - boost::hof::_)(2, 5));
  52     BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::rotate(boost::hof::_ - boost::hof::_)(2, 5));
  53 }
  54
  55 #if defined(__GNUC__) && !defined (__clang__) && __GNUC__ == 4 && __GNUC_MINOR__ < 7
  56 #define FINAL
  57 #else
  58 #define FINAL final
  59 #endif
  60
  61
  62 struct f FINAL {
  63     int operator()(int i, void *) const {
  64         return i;
  65     }
  66 };
  67
  68 BOOST_HOF_TEST_CASE()
  69 {
  70     BOOST_HOF_TEST_CHECK(boost::hof::rotate(f())(nullptr, 2) == 2);
  71 }