libcxx/test/std/containers/sequences/vector.bool/iterators.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <vector>
  10
  11 // iterator       begin();
  12 // iterator       end();
  13 // const_iterator begin()  const;
  14 // const_iterator end()    const;
  15 // const_iterator cbegin() const;
  16 // const_iterator cend()   const;
  17
  18 #include <vector>
  19 #include <cassert>
  20 #include <iterator>
  21
  22 #include "test_macros.h"
  23 #include "min_allocator.h"
  24
  25 TEST_CONSTEXPR_CXX20 bool tests()
  26 {
  27     using IterRefT = std::iterator_traits<std::vector<bool>::iterator>::reference;
  28     ASSERT_SAME_TYPE(IterRefT, std::vector<bool>::reference);
  29
  30     using ConstIterRefT = std::iterator_traits<std::vector<bool>::const_iterator>::reference;
  31 #if !defined(_LIBCPP_VERSION) || defined(_LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL)
  32     ASSERT_SAME_TYPE(ConstIterRefT, bool);
  33 #else
  34     ASSERT_SAME_TYPE(ConstIterRefT, std::__bit_const_reference<std::vector<bool> >);
  35 #endif
  36     {
  37         typedef bool T;
  38         typedef std::vector<T> C;
  39         C c;
  40         C::iterator i = c.begin();
  41         C::iterator j = c.end();
  42         assert(std::distance(i, j) == 0);
  43         assert(i == j);
  44     }
  45     {
  46         typedef bool T;
  47         typedef std::vector<T> C;
  48         const C c;
  49         C::const_iterator i = c.begin();
  50         C::const_iterator j = c.end();
  51         assert(std::distance(i, j) == 0);
  52         assert(i == j);
  53     }
  54     {
  55         typedef bool T;
  56         typedef std::vector<T> C;
  57         C c;
  58         C::const_iterator i = c.cbegin();
  59         C::const_iterator j = c.cend();
  60         assert(std::distance(i, j) == 0);
  61         assert(i == j);
  62         assert(i == c.end());
  63     }
  64     {
  65         typedef bool T;
  66         typedef std::vector<T> C;
  67         C::iterator i;
  68         C::const_iterator j;
  69         (void) i;
  70         (void) j;
  71     }
  72 #if TEST_STD_VER >= 11
  73     {
  74         typedef bool T;
  75         typedef std::vector<T, min_allocator<T>> C;
  76         C c;
  77         C::iterator i = c.begin();
  78         C::iterator j = c.end();
  79         assert(std::distance(i, j) == 0);
  80
  81         assert(i == j);
  82         assert(!(i != j));
  83
  84         assert(!(i < j));
  85         assert((i <= j));
  86
  87         assert(!(i > j));
  88         assert((i >= j));
  89
  90 #  if TEST_STD_VER >= 20
  91         // P1614 + LWG3352
  92         std::same_as<std::strong_ordering> decltype(auto) r = i <=> j;
  93         assert(r == std::strong_ordering::equal);
  94 #  endif
  95     }
  96     {
  97         typedef bool T;
  98         typedef std::vector<T, min_allocator<T>> C;
  99         const C c;
 100         C::const_iterator i = c.begin();
 101         C::const_iterator j = c.end();
 102         assert(std::distance(i, j) == 0);
 103
 104         assert(i == j);
 105         assert(!(i != j));
 106
 107         assert(!(i < j));
 108         assert((i <= j));
 109
 110         assert(!(i > j));
 111         assert((i >= j));
 112
 113 #  if TEST_STD_VER >= 20
 114         // P1614 + LWG3352
 115         std::same_as<std::strong_ordering> decltype(auto) r = i <=> j;
 116         assert(r == std::strong_ordering::equal);
 117 #  endif
 118     }
 119     {
 120         typedef bool T;
 121         typedef std::vector<T, min_allocator<T>> C;
 122         C c;
 123         C::const_iterator i = c.cbegin();
 124         C::const_iterator j = c.cend();
 125         assert(std::distance(i, j) == 0);
 126         assert(i == j);
 127         assert(i == c.end());
 128     }
 129     {
 130         typedef bool T;
 131         typedef std::vector<T, min_allocator<T>> C;
 132         C::iterator i;
 133         C::const_iterator j;
 134         (void) i;
 135         (void) j;
 136     }
 137 #endif
 138 #if TEST_STD_VER > 11
 139     { // N3644 testing
 140         std::vector<bool>::iterator ii1{}, ii2{};
 141         std::vector<bool>::iterator ii4 = ii1;
 142         std::vector<bool>::const_iterator cii{};
 143         assert ( ii1 == ii2 );
 144         assert ( ii1 == ii4 );
 145
 146         assert (!(ii1 != ii2 ));
 147
 148         assert ( (ii1 == cii ));
 149         assert ( (cii == ii1 ));
 150         assert (!(ii1 != cii ));
 151         assert (!(cii != ii1 ));
 152         assert (!(ii1 <  cii ));
 153         assert (!(cii <  ii1 ));
 154         assert ( (ii1 <= cii ));
 155         assert ( (cii <= ii1 ));
 156         assert (!(ii1 >  cii ));
 157         assert (!(cii >  ii1 ));
 158         assert ( (ii1 >= cii ));
 159         assert ( (cii >= ii1 ));
 160         assert (cii - ii1 == 0);
 161         assert (ii1 - cii == 0);
 162
 163 #  if TEST_STD_VER >= 20
 164         // P1614 + LWG3352
 165         std::same_as<std::strong_ordering> decltype(auto) r1 = ii1 <=> ii2;
 166         assert(r1 == std::strong_ordering::equal);
 167
 168         std::same_as<std::strong_ordering> decltype(auto) r2 = cii <=> ii2;
 169         assert(r2 == std::strong_ordering::equal);
 170 #  endif // TEST_STD_VER > 20
 171     }
 172 #endif
 173
 174     return true;
 175 }
 176
 177 int main(int, char**)
 178 {
 179     tests();
 180 #if TEST_STD_VER > 17
 181     static_assert(tests());
 182 #endif
 183     return 0;
 184 }