libstdc++-v3/testsuite/24_iterators/range_access/range_access_cpp14.cc

   1 // { dg-do run { target c++14 } }
   2
   3 // Copyright (C) 2015-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // C++ 2014 24.7, range access [iterator.range]
  21
  22 #include <iterator>
  23 #include <vector>
  24 #include <testsuite_hooks.h>
  25
  26 void
  27 test01()
  28 {
  29   int i[1];
  30   VERIFY(std::cbegin(i) == i);
  31   VERIFY(std::cend(i) == i+1);
  32   VERIFY(std::rbegin(i) == std::reverse_iterator<int*>(i+1));
  33   VERIFY(std::rend(i) == std::reverse_iterator<int*>(i));
  34   VERIFY(std::crbegin(i) == std::reverse_iterator<int*>(i+1));
  35   VERIFY(std::crend(i) == std::reverse_iterator<int*>(i));
  36 }
  37
  38 void
  39 test02()
  40 {
  41   static int i[1];
  42   // LWG 2280
  43   constexpr auto b  __attribute__((unused)) = std::begin(i);
  44   constexpr auto e  __attribute__((unused)) = std::end(i);
  45   constexpr auto cb __attribute__((unused)) = std::cbegin(i);
  46   constexpr auto ce __attribute__((unused)) = std::cend(i);
  47
  48   // LWG 2280
  49   static_assert( noexcept(std::begin(i)),  "LWG 2280" );
  50   static_assert( noexcept(std::end(i)),    "LWG 2280" );
  51   static_assert( noexcept(std::cbegin(i)), "LWG 2280" );
  52   static_assert( noexcept(std::cend(i)),   "LWG 2280" );
  53
  54   // LWG 3537
  55   static_assert( noexcept(std::rbegin(i)),  "LWG 3537" );
  56   static_assert( noexcept(std::rend(i)),    "LWG 3537" );
  57 }
  58
  59 void
  60 test03()
  61 {
  62   std::initializer_list<int> il{1};
  63   VERIFY(std::cbegin(il) == il.begin());
  64   VERIFY(std::cend(il) == il.end());
  65   VERIFY(std::rbegin(il) == std::reverse_iterator<const int*>(il.end()));
  66   VERIFY(std::rend(il) == std::reverse_iterator<const int*>(il.begin()));
  67   VERIFY(std::crbegin(il) == std::reverse_iterator<const int*>(il.end()));
  68   VERIFY(std::crend(il) == std::reverse_iterator<const int*>(il.begin()));
  69
  70   // LWG 3537
  71   static_assert( noexcept(std::rbegin(il)),  "LWG 3537" );
  72   static_assert( noexcept(std::rend(il)),    "LWG 3537" );
  73 }
  74
  75 void
  76 test04()
  77 {
  78   std::vector<int> v{1};
  79   VERIFY(std::cbegin(v) == v.cbegin());
  80   VERIFY(std::cend(v) == v.cend());
  81   VERIFY(std::rbegin(v) == v.rbegin());
  82   VERIFY(std::rend(v) == v.rend());
  83   VERIFY(std::crbegin(v) == v.crbegin());
  84   VERIFY(std::crend(v) == v.crend());
  85 }
  86
  87 int
  88 main()
  89 {
  90   test01();
  91   test02();
  92   test03();
  93   test04();
  94 }